Кл.слова (ненормированные):
birch stands -- climate-induced tree growth -- Biometrics -- Drought -- Forestry -- Vegetation -- Betula pendula roth -- Biometric parameters -- Diameter-at-breast heights -- Drought indices -- Inventory data -- Tree growth -- Vegetation periods -- Western siberia -- Carbon dioxide -- Betula -- Biometrics -- Carbon Dioxide -- Drought -- Fertilization -- Forestry -- Betula pendula
Аннотация: Birch (Betula pendula Roth) growth within the Western Siberia forest-steppe was analyzed based on long-term (1897-2006) inventory data (height, diameter at breast height [dbh], and stand volume). Analysis of biometry parameters showed increased growth at the beginning of twenty-first century compared to similar stands (stands age = 40-60 years) at the end of nineteenth century. Mean height, dbh, and stem volume increased from 14 to 20 m, from 16 to 22 cm, and from ?63 to ?220 m3/ha, respectively. Significant correlations were found between the stands mean height, dbh, and volume on the one hand, and vegetation period length (rs = 0.71 to 0.74), atmospheric CO2 concentration (rs = 0.71 to 0.76), and drought index (Standardized Precipitation-Evapotranspiration Index, rs = -0.33 to -0.51) on the other hand. The results obtained have revealed apparent climate-induced impacts (e.g. increase of vegetation period length and birch habitat drying due to drought increase) on the stands growth. Along with this, a high correlation of birch biometric parameters and [CO2] in ambient air indicated an effect of CO2 fertilization. Meanwhile, further drought increase may switch birch stand growth into decline and greater mortality as has already been observed within the Trans-Baikal forest-steppe ecotone. © 2014 © 2014 Taylor & Francis.
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Держатели документа:
Sukachev Forest Institute, Krasnoyarsk 660036, Russian Federation
GIS Chair, Siberian Federal University, Krasnoyarsk 660036, Russian Federation
NASA's Goddard Space Flight Center, Greenbelt, MD 20771, United States
Доп.точки доступа:
Kharuk, V.I.; Kuzmichev, V.V.; Im, S.T.; Ranson, K.J.