Кл.слова (ненормированные):
Alpine forest line -- Climate-induced tree response -- Forest-tundra ecotone -- Landsat -- Siberian pine -- Vegetation spatial pattern -- Air temperature -- Climate trends -- Crown closures -- Forest stand -- Forest-tundra ecotone -- Ground observations -- Krummholz -- LANDSAT -- Multi-temporal -- Pine vegetation -- Shift-and -- SIBERIA -- Slope steepness -- Spatial patterns -- Temperature limits -- Temperature trends -- Tree growth -- Upper boundary -- Data flow analysis -- Landforms -- Reforestation -- Temperature -- Vegetation -- Climate change -- Altitude -- Climates -- Data Processing -- Growth -- Mountains -- Pinus -- Plants -- Reforestation -- Satellites -- Trees -- Abies -- Pinus sibirica
Аннотация: Tree response to climate trends is most likely to be observed in the forest-tundra ecotone, where mainly temperature limits tree growth. On-ground observation and multitemporal Landsat data were used in the analysis of forest-tundra ecotone dynamics (from 1976 to 2000) in the Western Sayan Mountains, Siberia. Observations showed an increase in forest stand crown closure, upward tree-line and regeneration shift and the transformation of Siberian pine and fir krummholz into arboreal forms. Closed stands were increasing in the area at a rate of 0.8% year -1 and advancing their upper boundary at an altitudinal rate of 0.6 m year -1; these changes were shown mainly by the transformation of sparse stands into closed stands. The altitudinal rate of regeneration propagation was estimated at 1.2 m year -1. It was also found that these changes correlated positively with temperature trends. The response of tree vegetation to air temperature increase was dependent on topographic relief features (azimuth and slope steepness). В© 2010 Taylor & Francis.
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Полный текст
Держатели документа:
V. N. Sukachev Institute of Forest, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Kharuk, V.I.; Im, S.T.; Dvinskaya, M.L.