Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ B. Yang [et al.] // Proc. Natl. Acad. Sci. U. S. A. - 2017. - Vol. 114, Is. 27. - P6966-6971, DOI 10.1073/pnas.1616608114. - Cited References:51. - We are grateful to the three anonymous reviewers for their invaluable comments. We are grateful to Q. B. Zhang, Z. S. Li, and X. H. Gou for providing the tree-ring data; to T. Che, L. Y. Dai, and L. Xiao for forwarding the snow depth dataset; to J. C. Xu and H. Y. Yu for providing phenological data; to C. Qin, M. Song, X. Wang, and T. Yang for doing support in simulation; to Prof. Quansheng Ge, Prof. Kathleen A. Campbell, David Chandler, and Martin Cregeen for suggestions and language edits; and to the National Natural Reserve of the Qilian Mountains for logistic support. We acknowledge the International Tree-Ring Data Bank as the source of some of our tree-ring data. This study was jointly funded by the National Natural Science Foundation of China (Grants 41520104005, 41325008, and 41661144008). V.S. and I.T. were supported by the Russian Science Foundation (Grant 14-14-00219P). V. S. acknowledges the support of the Chinese Academy of Sciences President's International Fellowship for Visiting Scientists (Grant 2016VEC033). M.H. appreciates the support of the Alexander von Humboldt Foundation. . - ISSN 0027-8424РУБ Multidisciplinary Sciences

Аннотация: Phenological responses of vegetation to climate, in particular to the ongoing warming trend, have received much attention. However, divergent results from the analyses of remote sensing data have been obtained for the Tibetan Plateau (TP), the world's largest high-elevation region. This study provides a perspective on vegetation phenology shifts during 1960-2014, gained using an innovative approach based on a well-validated, process-based, tree-ring growth model that is independent of temporal changes in technical properties and image quality of remote sensing products. Twenty composite site chronologies were analyzed, comprising about 3,000 trees from forested areas across the TP. We found that the start of the growing season (SOS) has advanced, on average, by 0.28 d/y over the period 1960-2014. The end of the growing season (EOS) has been delayed, by an estimated 0.33 d/y during 1982-2014. No significant changes in SOS or EOS were observed during 1960-1981. April-June and August-September minimum temperatures are the main climatic drivers for SOS and EOS, respectively. An increase of 1 degrees C in April-June minimum temperature shifted the dates of xylem phenology by 6 to 7 d, lengthening the period of tree-ring formation. This study extends the chronology of TP phenology farther back in time and reconciles the disparate views on SOS derived from remote sensing data. Scaling up this analysis may improve understanding of climate change effects and related phenological and plant productivity on a global scale.

WOS,
Смотреть статью,
Scopus

Держатели документа:
Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China.
Univ Erlangen Nurnberg, Inst Geog, D-91058 Erlangen, Germany.
Siberian Fed Univ, Math Methods & Informat Technol Dept, Krasnoyarsk 660075, Russia.
Russian Acad Sci, VN Sukachev Inst Forest, Lab Tree Ring Struct, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Univ Quebec Chicoutimi, Dept Sci Fondamentales, Chicoutimi, PQ G7H 2B1, Canada.
Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China.
Stockholm Univ, Dept Hist, SE-10691 Stockholm, Sweden.
Stockholm Univ, Bolin Ctr Climate Res, SE-10691 Stockholm, Sweden.

Доп.точки доступа:
Yang, Bao; He, Minhui; Shishov, Vladimir; Tychkov, Ivan; Vaganov, Eugene; Rossi, Sergio; Ljungqvist, Fredrik Charpentier; Brauning, A.; Griessinger, Jussi; National Natural Science Foundation of China [41520104005, 41325008, 41661144008]; Russian Science Foundation [14-14-00219P]; Chinese Academy of Sciences [2016VEC033]; Alexander von Humboldt Foundation

/ E. Babushkina, D. Zhirnova, L. Belokopytova, E. Vaganov // J Mt. Sci. - 2020. - Vol. 17, Is. 1. - P16-30, DOI 10.1007/s11629-019-5516-6. - Cited References:82. - Authors would like to thank administration of the National Park "ShushenskyBor" and personally its director Tolmachev V.A. for providing permission and facilitating field work on the park territory. The research reported in this manuscript is funded by the Russian Foundation for Basic Research (Project No. 17-04-00315, data aquisition and wood anatomy analysis) and Russian Science Foundation (Project No 19-18-00145, analysis of climate change and its impact). . - ISSN 1672-6316. - ISSN 1993-0321РУБ Environmental Sciences

Аннотация: The warming-driven increase of the vegetation season length impacts both net productivity and phenology of plants, changing an annual carbon cycle of terrestrial ecosystems. To evaluate this influence, tree growth along the temperature gradients can be investigated on various organization levels, beginning from detailed climatic records in xylem cells' number and morphometric parameters. In this study, the Borus Ridge of the Western Sayan Mountains (South Siberia) was considered as a forest area under rapid climate change caused by massive Sayano-Shushenskoe reservoir. Several parameters of the xylem anatomical structure in Siberian spruce (Picea obovata Ledeb.) were derived from normalized tracheidograms of cell radial diameter and cell wall thickness and analyzed during 50 years across elevational gradient (at 520, 960, and 1320 m a.s.l.). On the regional scale, the main warming by 0.42 degrees C per decade occurs during cold period (November-March). Construction of the reservoir accelerated local warming substantially since 1980, when abrupt shift of the cold season temperature by 2.6 degrees C occurred. It led to the vegetation season beginning 3-6 days earlier and ending 4-10 day later with more stable summer heat supply. Two spatial patterns were found in climatic response of maximal cell wall thickness: (1) temperature has maximal impact during 21-day period, and its seasonality shifts with elevation in tune with temperature gradient; (2) response to the date of temperature passing +9.5 degrees C threshold is observed at two higher sites. Climate change yielded significantly bigger early wood spruce tracheids at all sites, but its impact on cell wall deposition process had elevational gradient: maximal wall thickness increased by 7.9% at the treeline, by 18.2% mid-range, and decreased by 4.9% at the lower boundary of spruce growth; normalized total cell wall area increased by 6.2%-6.8% at two higher sites but remained stable at the lowest one. We believe that these patterns are caused by two mechanisms of spruce secondary growth cessation: "emergency" induced by temperature drop versus "regular" one in warmer conditions. Therefore, autumn lengthening of growth season stimulated wood matter accumulation in tracheid walls mainly in cold environment, increasing role of boreal and mountain forests in carbon cycle.

WOS

Держатели документа:
Siberian Fed Univ, Khakass Tech Inst, Abakan 633017, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, SukachevInst Forest, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Babushkina, Elena; Zhirnova, Dina; Belokopytova, Liliana; Vaganov, Eugene; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [17-04-00315]; Russian Science FoundationRussian Science Foundation (RSF) [19-18-00145]