: материалы временных коллективов / M. L. Dvinskaya, S. T. Im // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 34
Аннотация: The results show that Siberian pine and spruce have high K1 values both along the margin and in the center of zones of absolute larch dominance. There is tendency of K1 to increase. for DNC and birch from south to north and from west to east. Scots pine did not significantly penetrate into the zone of larch dominance.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50, стр., 28
Доп.точки доступа:
Im, Sergey Tkhekdyeyevich
Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН
w10=
Найдено документов в текущей БД: 82
Dark needle conifer invasion into larch dominated communities as response to climate trends
Climate change, and glaciers indicated by tree-ring chronologies
: материалы временных коллективов / D. V. Ovchinnikov // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 34
Аннотация: Dendroclimatic analysis shows that summer temperature is a common limiting factor which influences mass balance, ablation and maximum density there for it is not surprising that these are closely correlated. The model reproduces well the increase of the glacier in the middle of 1980s and the decrease of mass balance from the middle 19Th to the late 20th century.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Овчинников, Дмитрий Викторович
Аннотация: Dendroclimatic analysis shows that summer temperature is a common limiting factor which influences mass balance, ablation and maximum density there for it is not surprising that these are closely correlated. The model reproduces well the increase of the glacier in the middle of 1980s and the decrease of mass balance from the middle 19Th to the late 20th century.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Овчинников, Дмитрий Викторович
Analysis of tree-ring growth curves form
: материалы временных коллективов / A. E. Petrenko // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 34-35
Аннотация: Measurements of conifers tree ring width from 280 dendrochronological sites were analyzed for Russia. Tree-ring series by the cambial age of the ring (also known as regional growth curves) were fitted with negative-exponential curve using maximum and minimum ring width and a constant related to site as the parameters of approximation.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Петренко, Алексей Евгеньевич
Аннотация: Measurements of conifers tree ring width from 280 dendrochronological sites were analyzed for Russia. Tree-ring series by the cambial age of the ring (also known as regional growth curves) were fitted with negative-exponential curve using maximum and minimum ring width and a constant related to site as the parameters of approximation.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Петренко, Алексей Евгеньевич
Modelling of seasonal dynamics and annual photosynthesis in conifers and its relation with radial growth
: материалы временных коллективов / A. V. Benkova // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 32
Аннотация: At high latitudes, where temperature determines the growth process, the calculated dynamics of productivity adequately describe real dynamics of certain conifer growth. In time periods, when the link between productivity and radiall growth decreases, water regime of a tree plays an increasingly important role.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Бенькова, Анна Викторовна
Аннотация: At high latitudes, where temperature determines the growth process, the calculated dynamics of productivity adequately describe real dynamics of certain conifer growth. In time periods, when the link between productivity and radiall growth decreases, water regime of a tree plays an increasingly important role.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Бенькова, Анна Викторовна
Dynamics of wood density and b13C in tree rings of beech (Fagus sylvatica L.) growing in Germany and Italy
: материалы временных коллективов / M. V. Skomarkova // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 30-31
Аннотация: The relationship between seasonal changes in tree-ring structure and carbon isotope composition can be used to study carbon storage and re-allocation, which is important for improving models of tree-ring growth and carbon isotope fractionation.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Скомаркова, Марина Викторовна
Аннотация: The relationship between seasonal changes in tree-ring structure and carbon isotope composition can be used to study carbon storage and re-allocation, which is important for improving models of tree-ring growth and carbon isotope fractionation.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Скомаркова, Марина Викторовна
Relation on NPP for ecosystem different components to climate changes
: материалы временных коллективов / M. V. Skomarkova // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 29
Аннотация: Our results show that the main contribution to changes in annual biomass productivity in forest-tundra and northern taiga ecosystems under the predicted climatic changes will be determined by living ground cover.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Кнорре, Анастасия Алексеевна
Аннотация: Our results show that the main contribution to changes in annual biomass productivity in forest-tundra and northern taiga ecosystems under the predicted climatic changes will be determined by living ground cover.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Кнорре, Анастасия Алексеевна
Possible change in distribution of vegetation, tree species and their climatypes in Siberia in a warming climate
: материалы временных коллективов / N. M. Tchebakova // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 28
Аннотация: The results show enormous changes in the vegetation cover of Siberia for a warmed climate. Southern vegetation types such as southen taiga, subtaiga, and forest-steppe are expected to expand from about 10% to 70% coverage. This increase in coverage would be largely at the expense of northern and middle taiga each of which would then occupy less than 20%. Some contemporary climatypes are projected to diappear from Siberia while others common elsewhere would evolve. To mitigate these effects, climatypes should be transferred today to the expected future location of their climatic optima, a distance that is likely to approach 700-1200 km for Siberian species of larches.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Чебакова, Надежда Михайловна
Аннотация: The results show enormous changes in the vegetation cover of Siberia for a warmed climate. Southern vegetation types such as southen taiga, subtaiga, and forest-steppe are expected to expand from about 10% to 70% coverage. This increase in coverage would be largely at the expense of northern and middle taiga each of which would then occupy less than 20%. Some contemporary climatypes are projected to diappear from Siberia while others common elsewhere would evolve. To mitigate these effects, climatypes should be transferred today to the expected future location of their climatic optima, a distance that is likely to approach 700-1200 km for Siberian species of larches.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Чебакова, Надежда Михайловна
The use of scanning X-ray fluorescent techniques to analyse the distribution of chemical elements in tree rings
: материалы временных коллективов / M. M. Naurzbaev, V. V. Shishov // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 24-25
Аннотация: In this work tree cores of Siberian Larch (Larix Sibirica) from the Altai mountains, Russia were used. We assume that the distribution of chemical elements within the tree-rings is the same as the distribution found in the local environment of the tree. The main goal of this work is to recover a year-to-year biochemical, geochemical and climatic history of a tree's local environment.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Shishov, Vladimir Valer'yevich; Шишов, Владимир Валерьевич; Наурзбаев, Мухтар Мухаметович
Аннотация: In this work tree cores of Siberian Larch (Larix Sibirica) from the Altai mountains, Russia were used. We assume that the distribution of chemical elements within the tree-rings is the same as the distribution found in the local environment of the tree. The main goal of this work is to recover a year-to-year biochemical, geochemical and climatic history of a tree's local environment.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Shishov, Vladimir Valer'yevich; Шишов, Владимир Валерьевич; Наурзбаев, Мухтар Мухаметович
Modern tendencies in tree-ring growth for Russia
: материалы временных коллективов / V. V. Shishov // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 24
Аннотация: The analysis of long tree-ring chronologies fro Northern timberline has revealed differences between temperature changes (principal factor limiting tree growth) and a measured tree growth after 1960 (Briffa et al, 1998; 2004). The ppurpose of the present work was a spatial analysis of tree-ring growth, as forced by climatic factors, both before and after 1960 over extensive territories in Russia.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Шишов, Владимир Валерьевич
Аннотация: The analysis of long tree-ring chronologies fro Northern timberline has revealed differences between temperature changes (principal factor limiting tree growth) and a measured tree growth after 1960 (Briffa et al, 1998; 2004). The ppurpose of the present work was a spatial analysis of tree-ring growth, as forced by climatic factors, both before and after 1960 over extensive territories in Russia.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Шишов, Владимир Валерьевич
The current warming and shifting of ice events on the siberian rivers
: материалы временных коллективов / V. S. Myglan // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 31
Аннотация: This study represents the results of an analysis of long-timescale series of annual observations of the melting and freezing of ice on Siberian rivers (Ob, Irtysh, Enisey, Angara, etc.). The dates of these ice events are related to spring and autumn temperatures. The relation between an indirect indicator of changing summer temperatures, tree-growth indices derived from tree-ring chronologies, and the period of open water is shown.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Мыглан, Владимир Станиславович
Аннотация: This study represents the results of an analysis of long-timescale series of annual observations of the melting and freezing of ice on Siberian rivers (Ob, Irtysh, Enisey, Angara, etc.). The dates of these ice events are related to spring and autumn temperatures. The relation between an indirect indicator of changing summer temperatures, tree-growth indices derived from tree-ring chronologies, and the period of open water is shown.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Мыглан, Владимир Станиславович
Simulation modeling of tree-ring series in temoerature and water limited sites
: материалы временных коллективов / Artem Ivanovsky // Workshop on climate change, the tree growth response, and reconstruction of climate 25-29 January 2006, V.N. Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of Forest SB RAS, 2006. - С. 33
Аннотация: 285 tree-ring chronologies were used for tree-ring modeling (biophysical VS-model). All chronologies are located in the Eurasian part of Russia. Due to limitations of the present meteorological network in this territory for use in spatial tree-ring modeling, monthly climatic data were obtained from the high spatial resolution climate dataset (Climatic Research Unit, UEA, Norwich, UK) for ieach site. Average monthly temperature and cumulative precipitation were converted into daily data using a technique created by author. These daily datasets were used by the VS-model.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Ивановский, Артем Борисович
Аннотация: 285 tree-ring chronologies were used for tree-ring modeling (biophysical VS-model). All chronologies are located in the Eurasian part of Russia. Due to limitations of the present meteorological network in this territory for use in spatial tree-ring modeling, monthly climatic data were obtained from the high spatial resolution climate dataset (Climatic Research Unit, UEA, Norwich, UK) for ieach site. Average monthly temperature and cumulative precipitation were converted into daily data using a technique created by author. These daily datasets were used by the VS-model.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Ивановский, Артем Борисович
Reassessing the evidence for tree-growth and inferred temperature change during the Common Era in Yamalia, northwest Siberia
/ K. R. Briffa [et al.] // Quat. Sci. Rev. - 2013. - Vol. 72. - P83-107, DOI 10.1016/j.quascirev.2013.04.008. - Cited References: 70. - KRB, TMM and TJO acknowledge support from NERC (NE/G018863/1). RMH, AVK, VSM and SGS acknowledge support from the partnership project of the Ural and Siberian Branches of the Russian Academy of Sciences (No 12-C-4-1038 and No 69). SGS, VSM and RMH acknowledge support from the Russian Foundation for Basic Research (No 11-04-00623-a, No 13-04-00961-a and No 13-04-02058).
. - 25. - ISSN 0277-3791
РУБ Geography, Physical + Geosciences, Multidisciplinary
Аннотация: The development of research into the history of tree growth and inferred summer temperature changes in Yamaha spanning the last 2000 years is reviewed. One focus is the evolving production of tree-ring width (TRW) and tree-ring maximum-latewood density (MXD) larch (Larix sibirica) chronologies, incorporating different applications of Regional Curve Standardisation (RCS). Another focus is the comparison of independent data representing past tree growth in adjacent Yamaha areas: Yamal and Polar Urals, and the examination of the evidence for common growth behaviour at different timescales. The sample data we use are far more numerous and cover a longer time-span at Yamal compared to the Polar Urals, but Yamal has only TRW, while there are both TRW and MXD for the Polar Urals. We use more data (sub-fossil and from living trees) than in previous dendroclimatic studies in this region. We develop a new TRW chronology for Yamal, more than 2000 years long and running up to 2005. For the Polar Urals we develop new TRW and MXD chronologies that show good agreement at short (<15 years) and medium (15-100 years) timescales demonstrating the validity of attempts to reconcile the evidence of longer-timescale information that they provide. We use a "conservative" application of the RCS approach (two-curve signal-free RCS), guarding against the possibility of "modern sample bias": a possible inflation of recent chronology values arising out of inadvertent selection of mostly relatively fast-growing trees in recent centuries. We also transform tree indices to have a normal distribution to remove the positive chronology skew often apparent in RCS TRW chronologies. This also reduces the apparent magnitude of 20th century tree-growth levels. There is generally good agreement between all chronologies as regards the major features of the decadal to centennial variability. Low tree-growth periods for which the inferred summer temperatures are approximately 2.5 degrees C below the 1961-90 reference are apparent in the 15-year smoothed reconstructions, centred around 1005, 1300, 1455, 1530, particularly the 1810s where the inferred cooling reaches -4 degrees C or even -6 degrees C for individual years, and the 1880s. These are superimposed on generally cool pre-20th century conditions: the long-term means of the pre-1900 reconstructed temperature anomalies range from -0.6 to -0.9 degrees C in our alternative reconstructions. There are numerous periods of one or two decades with relatively high growth (and inferred summer temperatures close to the 1961-1990 level) but at longer timescales only the 40-year period centred at 250 CE appears comparable with 20th century warmth. Although the central temperature estimate for this period is below that for the recent period, when we take into account the uncertainties we cannot be highly confident that recent warmth has exceeded the temperature of this earlier warm period. While there are clear warm decades either side of 1000 CE, neither TRW nor MXD data support the conclusion that temperatures were exceptionally high during medieval times. One previous version of the Polar Urals TRW chronology is shown here to be in error due to an injudicious application of RCS to non-homogeneous sample data, partly derived from root-collar samples that produce spuriously high chronology values in the 11th and 15th centuries. This biased chronology has been used in a number of recent studies aimed at reconstructing wider scale temperature histories. All of the chronologies we have produced here clearly show a generally high level of growth throughout their most recent 80 years. Allowing for chronology and reconstruction uncertainty, the mean of the last 100 years of the reconstruction is likely warmer than any century in the last 2000 years in this region. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Briffa, Keith R.
Melvin, Thomas M.
Osborn, Timothy J.] Univ E Anglia, Sch Environm Sci, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England
[Hantemirov, Rashit M.
Mazepa, Valeriy S.
Shiyatov, Stepan G.] Russian Acad Sci, Ural Branch, Inst Plant & Anim Ecol, Ekaterinburg 620144, Russia
[Kirdyanov, Alexander V.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Esper, Jan] Johannes Gutenberg Univ Mainz, Dept Geog, D-55099 Mainz, Germany
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Briffa, K.R.; Melvin, T.M.; Osborn, T.J.; Hantemirov, R.M.; Kirdyanov, A.V.; Mazepa, V.S.; Shiyatov, S.G.; Esper, J...
Рубрики:
REGIONAL CURVE STANDARDIZATION
TROPICAL NORTHERN-HEMISPHERE
SUMMER TEMPERATURES
RING CHRONOLOGIES
CLIMATE VARIABILITY
2 MILLENNIA
RECONSTRUCTION
AMPLIFICATION
REGRESSION
HOLOCENE
Кл.слова (ненормированные):
Dendroclimatology -- Climate reconstruction -- Medieval Warm Period -- Polar Urals -- Yamal -- Summer temperature
REGIONAL CURVE STANDARDIZATION
TROPICAL NORTHERN-HEMISPHERE
SUMMER TEMPERATURES
RING CHRONOLOGIES
CLIMATE VARIABILITY
2 MILLENNIA
RECONSTRUCTION
AMPLIFICATION
REGRESSION
HOLOCENE
Кл.слова (ненормированные):
Dendroclimatology -- Climate reconstruction -- Medieval Warm Period -- Polar Urals -- Yamal -- Summer temperature
Аннотация: The development of research into the history of tree growth and inferred summer temperature changes in Yamaha spanning the last 2000 years is reviewed. One focus is the evolving production of tree-ring width (TRW) and tree-ring maximum-latewood density (MXD) larch (Larix sibirica) chronologies, incorporating different applications of Regional Curve Standardisation (RCS). Another focus is the comparison of independent data representing past tree growth in adjacent Yamaha areas: Yamal and Polar Urals, and the examination of the evidence for common growth behaviour at different timescales. The sample data we use are far more numerous and cover a longer time-span at Yamal compared to the Polar Urals, but Yamal has only TRW, while there are both TRW and MXD for the Polar Urals. We use more data (sub-fossil and from living trees) than in previous dendroclimatic studies in this region. We develop a new TRW chronology for Yamal, more than 2000 years long and running up to 2005. For the Polar Urals we develop new TRW and MXD chronologies that show good agreement at short (<15 years) and medium (15-100 years) timescales demonstrating the validity of attempts to reconcile the evidence of longer-timescale information that they provide. We use a "conservative" application of the RCS approach (two-curve signal-free RCS), guarding against the possibility of "modern sample bias": a possible inflation of recent chronology values arising out of inadvertent selection of mostly relatively fast-growing trees in recent centuries. We also transform tree indices to have a normal distribution to remove the positive chronology skew often apparent in RCS TRW chronologies. This also reduces the apparent magnitude of 20th century tree-growth levels. There is generally good agreement between all chronologies as regards the major features of the decadal to centennial variability. Low tree-growth periods for which the inferred summer temperatures are approximately 2.5 degrees C below the 1961-90 reference are apparent in the 15-year smoothed reconstructions, centred around 1005, 1300, 1455, 1530, particularly the 1810s where the inferred cooling reaches -4 degrees C or even -6 degrees C for individual years, and the 1880s. These are superimposed on generally cool pre-20th century conditions: the long-term means of the pre-1900 reconstructed temperature anomalies range from -0.6 to -0.9 degrees C in our alternative reconstructions. There are numerous periods of one or two decades with relatively high growth (and inferred summer temperatures close to the 1961-1990 level) but at longer timescales only the 40-year period centred at 250 CE appears comparable with 20th century warmth. Although the central temperature estimate for this period is below that for the recent period, when we take into account the uncertainties we cannot be highly confident that recent warmth has exceeded the temperature of this earlier warm period. While there are clear warm decades either side of 1000 CE, neither TRW nor MXD data support the conclusion that temperatures were exceptionally high during medieval times. One previous version of the Polar Urals TRW chronology is shown here to be in error due to an injudicious application of RCS to non-homogeneous sample data, partly derived from root-collar samples that produce spuriously high chronology values in the 11th and 15th centuries. This biased chronology has been used in a number of recent studies aimed at reconstructing wider scale temperature histories. All of the chronologies we have produced here clearly show a generally high level of growth throughout their most recent 80 years. Allowing for chronology and reconstruction uncertainty, the mean of the last 100 years of the reconstruction is likely warmer than any century in the last 2000 years in this region. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.
Полный текст,
WOS,
Scopus
Держатели документа:
[Briffa, Keith R.
Melvin, Thomas M.
Osborn, Timothy J.] Univ E Anglia, Sch Environm Sci, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England
[Hantemirov, Rashit M.
Mazepa, Valeriy S.
Shiyatov, Stepan G.] Russian Acad Sci, Ural Branch, Inst Plant & Anim Ecol, Ekaterinburg 620144, Russia
[Kirdyanov, Alexander V.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Esper, Jan] Johannes Gutenberg Univ Mainz, Dept Geog, D-55099 Mainz, Germany
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Briffa, K.R.; Melvin, T.M.; Osborn, T.J.; Hantemirov, R.M.; Kirdyanov, A.V.; Mazepa, V.S.; Shiyatov, S.G.; Esper, J...
Stable carbon isotope labeling reveals different carry-over effects between functional types of tropical trees in an Ethiopian mountain forest
/ J. . Krepkowski [et al.] // New Phytol. - 2013. - Vol. 199, Is. 2. - P431-440, DOI 10.1111/nph.12266. - Cited References: 56. - We are indebted to the German Research Foundation for funding this project (BR 1895/15). We are grateful to the two anonymous reviewers for their constructive comments, which helped us to improve the quality of the paper.
. - 10. - ISSN 0028-646X
РУБ Plant Sciences
Аннотация: We present an intra-annual stable carbon isotope (13C) study based on a labeling experiment to illustrate differences in temporal patterns of recent carbon allocation to wood structures of two functional types of trees, Podocarpus falcatus (a late-successional evergreen conifer) and Croton macrostachyus (a deciduous broadleaved pioneer tree), in a tropical mountain forest in Ethiopia. Dendrometer data, wood anatomical thin sections, and intra-annual 13C analyses were applied. Isotope data revealed a clear annual growth pattern in both studied species. For P.falcatus, it was possible to synchronize annual 13C peaks, wood anatomical structures and monthly precipitation patterns. The labeling signature was evident for three consecutive years. For C.macrostachyus, isotope data illustrate a rapid decline of the labeling signal within half a year. Our 13C labeling study indicates a distinct difference in carryover effects between trees of different functional types. A proportion of the labeled 13C is stored in reserves of wood parenchyma for up to 3yr in P.falcatus. By contrast, C.macrostachyus shows a high turnover of assimilates and a carbon carryover effect is only detectable in the subsequent year.
Полный текст,
WOS,
Scopus
Держатели документа:
[Krepkowski, Julia
Braeuning, Achim] Univ Erlangen Nurnberg, Inst Geog, D-91054 Erlangen, Germany
[Gebrekirstos, Aster] World Agroforestry Ctr, Nairobi, Kenya
[Shibistova, Olga] Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany
[Shibistova, Olga] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Krepkowski, J...; Gebrekirstos, A...; Shibistova, O...; Brauning, A...
Рубрики:
PODOCARPUS-FALCATUS
SOUTHERN ETHIOPIA
ALPHA-CELLULOSE
DECIDUOUS TREES
GROWTH DYNAMICS
TIME-SERIES
RINGS
RECONSTRUCTION
DELTA-C-13
DELTA-O-18
Кл.слова (ненормированные):
carryover effect -- dendrometer -- Ethiopia -- growth dynamics -- stable carbon isotopes -- tropical dendrochronology -- wood anatomy
PODOCARPUS-FALCATUS
SOUTHERN ETHIOPIA
ALPHA-CELLULOSE
DECIDUOUS TREES
GROWTH DYNAMICS
TIME-SERIES
RINGS
RECONSTRUCTION
DELTA-C-13
DELTA-O-18
Кл.слова (ненормированные):
carryover effect -- dendrometer -- Ethiopia -- growth dynamics -- stable carbon isotopes -- tropical dendrochronology -- wood anatomy
Аннотация: We present an intra-annual stable carbon isotope (13C) study based on a labeling experiment to illustrate differences in temporal patterns of recent carbon allocation to wood structures of two functional types of trees, Podocarpus falcatus (a late-successional evergreen conifer) and Croton macrostachyus (a deciduous broadleaved pioneer tree), in a tropical mountain forest in Ethiopia. Dendrometer data, wood anatomical thin sections, and intra-annual 13C analyses were applied. Isotope data revealed a clear annual growth pattern in both studied species. For P.falcatus, it was possible to synchronize annual 13C peaks, wood anatomical structures and monthly precipitation patterns. The labeling signature was evident for three consecutive years. For C.macrostachyus, isotope data illustrate a rapid decline of the labeling signal within half a year. Our 13C labeling study indicates a distinct difference in carryover effects between trees of different functional types. A proportion of the labeled 13C is stored in reserves of wood parenchyma for up to 3yr in P.falcatus. By contrast, C.macrostachyus shows a high turnover of assimilates and a carbon carryover effect is only detectable in the subsequent year.
Полный текст,
WOS,
Scopus
Держатели документа:
[Krepkowski, Julia
Braeuning, Achim] Univ Erlangen Nurnberg, Inst Geog, D-91054 Erlangen, Germany
[Gebrekirstos, Aster] World Agroforestry Ctr, Nairobi, Kenya
[Shibistova, Olga] Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany
[Shibistova, Olga] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Krepkowski, J...; Gebrekirstos, A...; Shibistova, O...; Brauning, A...
Reconstruction of forest ecosystem Holocene dynamics in the left bank of Kas River (Krasnoyarsk Region)
/ L. V. Karpenko, N. A. Rudaya // Contemp. Probl. Ecol. - 2013. - Vol. 6, Is. 2. - P137-142, DOI 10.1134/S1995425513020066. - Cited References: 12. - This work was supported by the Presidium of the Russian Academy of Sciences (program "Biological Diversity," project of the Siberian Branch, Russian Academy of Sciences, no. 26.2) and the Russian Foundation for Basic Research (project no. 09-04-01-380).
. - 6. - ISSN 1995-4255
РУБ Ecology
Кл.слова (ненормированные):
swamp -- peat deposit -- pollen analysis -- climate and vegetation reconstruction -- forest cover dynamics -- Holocene
Аннотация: A reconstruction of forest-cover dynamics in the northern part of the Kas River basin has been done for the first time. This study based on a palynological analysis of the peat profile. Six pollen zones and respective phases of forest evolution are distinguished. It is inferred that changes in the forest species composition over the last 8000 years were determined by variations in the global and regional climate. The warm and humid climate of the Atlantic period promoted the development of dark coniferous birch-spruce-fir forests. Cooling and smaller precipitation in the Subboreal period led to a change in dominant species to Scotch pine and birch-Siberian pine forests with an admixture of spruce and fir. In the Subatlantic period, closed coniferous forests eventually evolved, with Siberian pine-pine remaining dominant.
Полный текст,
WOS,
Scopus
Держатели документа:
[Karpenko, L. V.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Rudaya, N. A.] Russian Acad Sci, Siberian Branch, Inst Archaeol & Ethnog, Novosibirsk, Russia
Доп.точки доступа:
Karpenko, L.V.; Rudaya, N.A.
Кл.слова (ненормированные):
swamp -- peat deposit -- pollen analysis -- climate and vegetation reconstruction -- forest cover dynamics -- Holocene
Аннотация: A reconstruction of forest-cover dynamics in the northern part of the Kas River basin has been done for the first time. This study based on a palynological analysis of the peat profile. Six pollen zones and respective phases of forest evolution are distinguished. It is inferred that changes in the forest species composition over the last 8000 years were determined by variations in the global and regional climate. The warm and humid climate of the Atlantic period promoted the development of dark coniferous birch-spruce-fir forests. Cooling and smaller precipitation in the Subboreal period led to a change in dominant species to Scotch pine and birch-Siberian pine forests with an admixture of spruce and fir. In the Subatlantic period, closed coniferous forests eventually evolved, with Siberian pine-pine remaining dominant.
Полный текст,
WOS,
Scopus
Держатели документа:
[Karpenko, L. V.] Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Rudaya, N. A.] Russian Acad Sci, Siberian Branch, Inst Archaeol & Ethnog, Novosibirsk, Russia
Доп.точки доступа:
Karpenko, L.V.; Rudaya, N.A.
Extraction of the climatic signal for moisture from tree-ring chronologies of Altai-Sayan mountain forest-steppes
[Text] / V. N. Magda [et al.] // Contemp. Probl. Ecol. - 2011. - Vol. 4, Is. 7. - P716-724, DOI 10.1134/S1995425511070034. - Cited References: 20
. - 9. - ISSN 1995-4255
РУБ Ecology
Аннотация: Studies in Central Asia (Altai-Sayan region, northwest and central Mongolia) have shown that trees growing in arid conditions of mountain forest-steppes have a mixed and unstable climatic response. It is obvious that this nature of the climatic response of trees prevents the use of tree-ring chronologies for climate reconstruction. In this connection, it is necessary to separate the climatic signal of tree-ring chronologies, i.e., extract the signal for moisture. This paper proposes a method for separating the climatic signal of tree-ring chronologies of mountain forest-steppes, and reports estimates of its reliability by two independent methods. Analysis of the chronologies obtained after separation of the signal, based on meteorological and hydrological data, has shown that these chronologies can be used for climate reconstructions.
Полный текст,
Scopus,
WOS
Держатели документа:
[Magda, V. N.
Oidupaa, O. Ch.
Vaganov, E. A.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Block, J.] Friedrich Alexander Univ Erlangen Nuernberg, Inst Geog, Erlangen, Germany
Доп.точки доступа:
Magda, V.N.; Block, J...; Oidupaa, O.C.; Vaganov, E.A.
Аннотация: Studies in Central Asia (Altai-Sayan region, northwest and central Mongolia) have shown that trees growing in arid conditions of mountain forest-steppes have a mixed and unstable climatic response. It is obvious that this nature of the climatic response of trees prevents the use of tree-ring chronologies for climate reconstruction. In this connection, it is necessary to separate the climatic signal of tree-ring chronologies, i.e., extract the signal for moisture. This paper proposes a method for separating the climatic signal of tree-ring chronologies of mountain forest-steppes, and reports estimates of its reliability by two independent methods. Analysis of the chronologies obtained after separation of the signal, based on meteorological and hydrological data, has shown that these chronologies can be used for climate reconstructions.
Полный текст,
Scopus,
WOS
Держатели документа:
[Magda, V. N.
Oidupaa, O. Ch.
Vaganov, E. A.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
[Block, J.] Friedrich Alexander Univ Erlangen Nuernberg, Inst Geog, Erlangen, Germany
Доп.точки доступа:
Magda, V.N.; Block, J...; Oidupaa, O.C.; Vaganov, E.A.
Reconstruction of Paleohydrological Regime, Vegetation Change, and Peat Accumulation in a Bog in the Kas-Sym Interfluve
[Text] / L. V. Karpenko // Contemp. Probl. Ecol. - 2010. - Vol. 3, Is. 2. - P221-227, DOI 10.1134/S199542551002013X. - Cited References: 12
. - 7. - ISSN 1995-4255
РУБ Ecology
Кл.слова (ненормированные):
bog -- reconstruction -- paleohydrological regime -- vegetation changes -- peat accumulation
Аннотация: Comprehensive stratigraphic analyses of a standard peat profile laid on a large oligotrophic bog in the interfluve of Kas and Sym rivers, left tributaries of the Yenisei River, allowed reconstruction of local vegetation change and hydrological regime over a period of seven thousand years. The established three stages in vegetation succession in a local bog correspond to different degree of humidification. The development of bog ecosystem is found to be scarcely affected by regional climate. The process and rate of peat accumulation varied in different periods of the Holocene. The average rate of peat accumulation in the profile was 0.88 mm/year.
Полный текст,
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Karpenko, L.V.
Кл.слова (ненормированные):
bog -- reconstruction -- paleohydrological regime -- vegetation changes -- peat accumulation
Аннотация: Comprehensive stratigraphic analyses of a standard peat profile laid on a large oligotrophic bog in the interfluve of Kas and Sym rivers, left tributaries of the Yenisei River, allowed reconstruction of local vegetation change and hydrological regime over a period of seven thousand years. The established three stages in vegetation succession in a local bog correspond to different degree of humidification. The development of bog ecosystem is found to be scarcely affected by regional climate. The process and rate of peat accumulation varied in different periods of the Holocene. The average rate of peat accumulation in the profile was 0.88 mm/year.
Полный текст,
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Karpenko, L.V.
Climate signals in tree-ring width, density and delta C-13 from larches in Eastern Siberia (Russia)
[Text] / A. V. Kirdyanov [et al.] // Chem. Geol. - 2008. - Vol. 252, Is. 01.02.2013. - P31-41, DOI 10.1016/j.chemgeo.2008.01.023. - Cited References: 74
. - 11. - ISSN 0009-2541
РУБ Geochemistry & Geophysics
Аннотация: We present the first and longest (413 years) dataset on stable carbon isotope ratios in tree-ring cellulose (delta C-13), tree-ring width (TRW), and maximum latewood density (MXD) obtained from larch trees growing on permafrost under continental climate in the Suntar Khayata mountain ridge in Eastern Siberia (Russia). With this first study we calibrate tree-ring parameters against climate quantities, and based on these results assess the potential added value of MXD and especially of delta C-13 complementing TRW analysis for future climate reconstruction purposes. delta C-13 chronologies were corrected for human induced changes in atmospheric CO2 since AD 1800. Two different approaches were compared i) a correction referring merely to the decline in atmospheric delta C-13 (delta C-13(atm)) and ii) a correction additionally accounting for the increase in atmospheric partial pressure of CO2. delta C-13 chronologies are characterized by strong signal strength with only 4 trees representing the population signal at the site (mean inter-series correlation = 0.71 and EPS = 0.90). delta C-13 variation shows low similarity to TRW and MXD, while correlation between TRW and MXD is highly significant. Correlation analysis of tree-ring parameters with gridded instrumental data (Climate Research Unit, CRU TS 2.1) over the AD 1929-2000 calibration period demonstrates that TRW and MXD react as reported from other sites at cold and humid northern latitudes: precipitation plays no significant role, but strong dependencies on monthly mean, maximum and minimum temperatures, particularly of the current summer (June to August), are found (up to r=0.60, p<0.001). Combining instrumental data to a summer season mean (JJA) and TRW and MXD to a growth parameter mean (TRW+MXD), clearly shows the importance of the number of frost days and minimum temperatures during summer (r=0.67, p <0.001) to dominate tree growth and highlights the potential for climate reconstruction. Carbon isotope fixation in tree rings is obviously less controlled by temperature variables. In particular, the frost days and minimum temperature have a much smaller influence on delta C-13 than on tree growth. delta C-13 strongly reacts to current-year July precipitation (r=-0.44, p<0.05) and June-July maximum temperature (r=0.46, p<0.001). All significant (p<0.05) correlation coefficients are higher when using the corrected delta C-13 chronology considering an additional plant physiological response on increasing atmospheric CO2 concentration, than using the chronology corrected for delta C-13(atm) changes alone. Spatial distribution of correlations between tree-ring data and climate variables for Eastern Siberia indicates that the summer temperature regime in the studied region is mostly influenced by Arctic air masses, but precipitation in July seems to be brought out from the Pacific region. Both the combined TRW+MXD record and the (513 C record revealed a high reconstruction potential for summer temperature and precipitation, respectively, particularly on decadal and longer-term scales. (C) 2008 Elsevier B.V. All rights reserved.
Полный текст,
WOS
Держатели документа:
[Kirdyanov, Alexander V.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Treydte, Kerstin S.] Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland
[Nikolaev, Anatolli] Melnikov Inst Permafrost SB RAS Yakutsk, Yakutsk, Russia
[Helle, Gerhard
Schleser, Gerhard H.] ICG V, Inst Chem & Dynam Geosphere, Res Ctr Juelich GmbH, Julich, Germany
Доп.точки доступа:
Kirdyanov, A.V.; Treydte, K.S.; Nikolaev, A...; Helle, G...; Schleser, G.H.
Рубрики:
ATMOSPHERIC CARBON-DIOXIDE
MAXIMUM LATEWOOD DENSITY
TEMPERATURE-VARIATIONS
SUMMER TEMPERATURE
ISOTOPE RATIOS
SOIL-MOISTURE
EUROPEAN ALPS
FRENCH ALPS
VARIABILITY
GROWTH
Кл.слова (ненормированные):
tree rings -- stable carbon isotopes -- maximum latewood density -- Eastern Siberia -- permafrost -- dendroclimatology
ATMOSPHERIC CARBON-DIOXIDE
MAXIMUM LATEWOOD DENSITY
TEMPERATURE-VARIATIONS
SUMMER TEMPERATURE
ISOTOPE RATIOS
SOIL-MOISTURE
EUROPEAN ALPS
FRENCH ALPS
VARIABILITY
GROWTH
Кл.слова (ненормированные):
tree rings -- stable carbon isotopes -- maximum latewood density -- Eastern Siberia -- permafrost -- dendroclimatology
Аннотация: We present the first and longest (413 years) dataset on stable carbon isotope ratios in tree-ring cellulose (delta C-13), tree-ring width (TRW), and maximum latewood density (MXD) obtained from larch trees growing on permafrost under continental climate in the Suntar Khayata mountain ridge in Eastern Siberia (Russia). With this first study we calibrate tree-ring parameters against climate quantities, and based on these results assess the potential added value of MXD and especially of delta C-13 complementing TRW analysis for future climate reconstruction purposes. delta C-13 chronologies were corrected for human induced changes in atmospheric CO2 since AD 1800. Two different approaches were compared i) a correction referring merely to the decline in atmospheric delta C-13 (delta C-13(atm)) and ii) a correction additionally accounting for the increase in atmospheric partial pressure of CO2. delta C-13 chronologies are characterized by strong signal strength with only 4 trees representing the population signal at the site (mean inter-series correlation = 0.71 and EPS = 0.90). delta C-13 variation shows low similarity to TRW and MXD, while correlation between TRW and MXD is highly significant. Correlation analysis of tree-ring parameters with gridded instrumental data (Climate Research Unit, CRU TS 2.1) over the AD 1929-2000 calibration period demonstrates that TRW and MXD react as reported from other sites at cold and humid northern latitudes: precipitation plays no significant role, but strong dependencies on monthly mean, maximum and minimum temperatures, particularly of the current summer (June to August), are found (up to r=0.60, p<0.001). Combining instrumental data to a summer season mean (JJA) and TRW and MXD to a growth parameter mean (TRW+MXD), clearly shows the importance of the number of frost days and minimum temperatures during summer (r=0.67, p <0.001) to dominate tree growth and highlights the potential for climate reconstruction. Carbon isotope fixation in tree rings is obviously less controlled by temperature variables. In particular, the frost days and minimum temperature have a much smaller influence on delta C-13 than on tree growth. delta C-13 strongly reacts to current-year July precipitation (r=-0.44, p<0.05) and June-July maximum temperature (r=0.46, p<0.001). All significant (p<0.05) correlation coefficients are higher when using the corrected delta C-13 chronology considering an additional plant physiological response on increasing atmospheric CO2 concentration, than using the chronology corrected for delta C-13(atm) changes alone. Spatial distribution of correlations between tree-ring data and climate variables for Eastern Siberia indicates that the summer temperature regime in the studied region is mostly influenced by Arctic air masses, but precipitation in July seems to be brought out from the Pacific region. Both the combined TRW+MXD record and the (513 C record revealed a high reconstruction potential for summer temperature and precipitation, respectively, particularly on decadal and longer-term scales. (C) 2008 Elsevier B.V. All rights reserved.
Полный текст,
WOS
Держатели документа:
[Kirdyanov, Alexander V.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Treydte, Kerstin S.] Swiss Fed Res Inst WSL, CH-8903 Birmensdorf, Switzerland
[Nikolaev, Anatolli] Melnikov Inst Permafrost SB RAS Yakutsk, Yakutsk, Russia
[Helle, Gerhard
Schleser, Gerhard H.] ICG V, Inst Chem & Dynam Geosphere, Res Ctr Juelich GmbH, Julich, Germany
Доп.точки доступа:
Kirdyanov, A.V.; Treydte, K.S.; Nikolaev, A...; Helle, G...; Schleser, G.H.
Reconstruction of May-July precipitation in the north Helan Mountain, Inner Mongolia since AD 1726 from tree-ring late-wood widths
[Text] / Y. . Liu [et al.] // Chin. Sci. Bull. - 2004. - Vol. 49, Is. 4. - P405-409, DOI 10.1360/03wd0409. - Cited References: 16
. - 5. - ISSN 1001-6538
РУБ Multidisciplinary Sciences
Аннотация: By analyzing statistical characteristics of five tree-ring standard chronologies, early-wood ring width (EWW), late-wood ring width (LWW), total ring width (TRW), minimum early-wood density (MinD), maximum late-wood density (MaxD) and, their climatic response respectively, we reconstructed the May to July precipitation using late-wood ring width (LWW) over the north Helan Mountain since A.D. 1726. The explained variance is 42% (R-adj(2) = 41%, F = 31.46, p < 0.000001). After 11-a moving average, the explained variance reaches 82% (F = 156.9, p < 0.05). On the decadal scale, the rainfall reconstruction of the northern Helan Mountain displays a quite similar variation pattern with that of the April to early July precipitation in Baiyinaobao, east of Inner Mongolia for the last 150 years. It may reflect the intensity variation of the East Asia Summer Monsoon front to a certain extent. Spectrum analysis shows 11-a and 22-a periodicities in the May to July precipitation reconstruction at the north Helan Mountain.
Полный текст,
WOS,
Scopus
Держатели документа:
Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
Russian Acad Sci, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Liu, Y...; Shi, J.F.; Shishov, V...; Vaganov, E...; Yang, Y.K.; Cai, Q.F.; Sun, J.Y.; Wang, L...; Djanseitov, I...
Рубрики:
SERIES
CHINA
Кл.слова (ненормированные):
Helan Mountain -- pinus tabulaeformis -- late-wood ring width -- precipitation reconstruction
SERIES
CHINA
Кл.слова (ненормированные):
Helan Mountain -- pinus tabulaeformis -- late-wood ring width -- precipitation reconstruction
Аннотация: By analyzing statistical characteristics of five tree-ring standard chronologies, early-wood ring width (EWW), late-wood ring width (LWW), total ring width (TRW), minimum early-wood density (MinD), maximum late-wood density (MaxD) and, their climatic response respectively, we reconstructed the May to July precipitation using late-wood ring width (LWW) over the north Helan Mountain since A.D. 1726. The explained variance is 42% (R-adj(2) = 41%, F = 31.46, p < 0.000001). After 11-a moving average, the explained variance reaches 82% (F = 156.9, p < 0.05). On the decadal scale, the rainfall reconstruction of the northern Helan Mountain displays a quite similar variation pattern with that of the April to early July precipitation in Baiyinaobao, east of Inner Mongolia for the last 150 years. It may reflect the intensity variation of the East Asia Summer Monsoon front to a certain extent. Spectrum analysis shows 11-a and 22-a periodicities in the May to July precipitation reconstruction at the north Helan Mountain.
Полный текст,
WOS,
Scopus
Держатели документа:
Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
Russian Acad Sci, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Liu, Y...; Shi, J.F.; Shishov, V...; Vaganov, E...; Yang, Y.K.; Cai, Q.F.; Sun, J.Y.; Wang, L...; Djanseitov, I...
Feasibility of estimating stem size distribution from measurement on the largest trees in even-aged pure stands
[Text] / A. . Osawa, A. P. Abaimov // Can. J. For. Res.-Rev. Can. Rech. For. - 2001. - Vol. 31, Is. 5. - P910-918, DOI 10.1139/cjfr-31-5-910. - Cited References: 23
. - 9. - ISSN 0045-5067
РУБ Forestry
Аннотация: Reconstruction of the size distribution of trees in stands provides critical information for assessing the effects of environmental changes on forests and for forest management. For furthering a method of such reconstruction, feasibility of estimating size distribution in stem volume from measurement of the largest trees was examined for even-aged pure stands of Pinus banksiana Lamb.and Larix gmelinii (Rupr.) Rupr. We tested what percentage of the largest trees should be included in obtaining a frequency distribution in stem volume that is not statistically different from the observed size distribution patterns. The -3/2 power, beta-type, and adjusted beta-type distribution functions were applied. Comparison of the observed stem frequencies and those estimated from measurement of the largest trees in a stand suggested that (i) the -3/2 power distribution, beta-type distribution, or adjusted beta-type distribution may be used for reconstruction of stem size variation in pure stands, if the overall size variation could be approximated by one of these functions; (ii) we can be at least 95% sure that the tree size pattern be expressed successfully with the -3/2 power distribution with tree samples of only the largest 20% in the stand, or with the beta-type distribution with the largest 30% in the stand; and (iii) the reliability decreases somewhat for the adjusted beta-type distribution. The second observation implies that reconstruction of the temporal changes in stand structure may be reliable up to the time when the stand density was about five times that of the trees used for fitting the -3/2 power distribution curve. Reliability may be warranted up to the stand density of about three times as the number of trees used for fitting the beta-type distribution. Other considerations and limitations are also discussed.
WOS,
Scopus
Держатели документа:
Ryukoku Univ, Fac Intercultural Commun, Ohtsu, Shiga 5202194, Japan
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Osawa, A...; Abaimov, A.P.
Аннотация: Reconstruction of the size distribution of trees in stands provides critical information for assessing the effects of environmental changes on forests and for forest management. For furthering a method of such reconstruction, feasibility of estimating size distribution in stem volume from measurement of the largest trees was examined for even-aged pure stands of Pinus banksiana Lamb.and Larix gmelinii (Rupr.) Rupr. We tested what percentage of the largest trees should be included in obtaining a frequency distribution in stem volume that is not statistically different from the observed size distribution patterns. The -3/2 power, beta-type, and adjusted beta-type distribution functions were applied. Comparison of the observed stem frequencies and those estimated from measurement of the largest trees in a stand suggested that (i) the -3/2 power distribution, beta-type distribution, or adjusted beta-type distribution may be used for reconstruction of stem size variation in pure stands, if the overall size variation could be approximated by one of these functions; (ii) we can be at least 95% sure that the tree size pattern be expressed successfully with the -3/2 power distribution with tree samples of only the largest 20% in the stand, or with the beta-type distribution with the largest 30% in the stand; and (iii) the reliability decreases somewhat for the adjusted beta-type distribution. The second observation implies that reconstruction of the temporal changes in stand structure may be reliable up to the time when the stand density was about five times that of the trees used for fitting the -3/2 power distribution curve. Reliability may be warranted up to the stand density of about three times as the number of trees used for fitting the beta-type distribution. Other considerations and limitations are also discussed.
WOS,
Scopus
Держатели документа:
Ryukoku Univ, Fac Intercultural Commun, Ohtsu, Shiga 5202194, Japan
Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Osawa, A...; Abaimov, A.P.
The logic and uncertainty of explanations in organismal morphology (the principle of minimum change in evolution)
[Текст] / D. L. Grodnitsky // Zhurnal Obshchei Biol. - 1998. - Vol. 59, Is. 6. - С. 617-622. - Cited References: 117
. - 17. - ISSN 0044-4596
РУБ Biology
Аннотация: The development of certain form depends on natural selection and morphogenesis. The former process is resulted in analogies - characters of convergent similarity, while the latter can lead to non-adaptive parallel similarity of relatives (homologous series of N.I. Vavilov). Morphogenetic factor is shaped by past selection but does not depend on it at each new evolution act: spectrum of forms that can be produced is totally determined by embryological mechanisms and precedes the beginning of an evolutionary change. Mutual independence of two factors allows to use Bohr's correspondence principle. According to this principle any explanation is not full: it has its own competence area with its own rules for conclusions; there is no rules for logic transition between groups of accidental events; interaction of factors is expressed only as a limitation of their pattern formation abilities. To diminish uncertainty one can use the principle of evolution stabilisation of function by N.V. Kokshaisky, i.e. statement that functions of organism level are kept stable in the process of evolution while some changes at the lower levels are possible. The higher level of changes, the more complete reconstruction takes place in organism. The direction of evolution is minimisation of total sum of changes. As a consequence, the higher hierarchical level of function, more adaptive characters are belonged to its structures. And opposite, the lower hierarchical level, the more freedom for morphogenetic changes, the form of structures becomes indifferent for selection. Therefore the characters of high hierarchical levels can be explained in terms of adaptation, while the features of low level - on the base of morphogenetic peculiarities.
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest Res, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Grodnitsky, D.L.
Аннотация: The development of certain form depends on natural selection and morphogenesis. The former process is resulted in analogies - characters of convergent similarity, while the latter can lead to non-adaptive parallel similarity of relatives (homologous series of N.I. Vavilov). Morphogenetic factor is shaped by past selection but does not depend on it at each new evolution act: spectrum of forms that can be produced is totally determined by embryological mechanisms and precedes the beginning of an evolutionary change. Mutual independence of two factors allows to use Bohr's correspondence principle. According to this principle any explanation is not full: it has its own competence area with its own rules for conclusions; there is no rules for logic transition between groups of accidental events; interaction of factors is expressed only as a limitation of their pattern formation abilities. To diminish uncertainty one can use the principle of evolution stabilisation of function by N.V. Kokshaisky, i.e. statement that functions of organism level are kept stable in the process of evolution while some changes at the lower levels are possible. The higher level of changes, the more complete reconstruction takes place in organism. The direction of evolution is minimisation of total sum of changes. As a consequence, the higher hierarchical level of function, more adaptive characters are belonged to its structures. And opposite, the lower hierarchical level, the more freedom for morphogenetic changes, the form of structures becomes indifferent for selection. Therefore the characters of high hierarchical levels can be explained in terms of adaptation, while the features of low level - on the base of morphogenetic peculiarities.
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest Res, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Grodnitsky, D.L.