Interannual variation of plant activity in earstern Siberian Taiga

Abstract

Taiga forest, which covers a huge area on permafrost in Eastern Siberia, is expected to affect on global water and carbon cycles. Soil moisture and its stable isotope ratios, photosynthetic activity, and carbon and nytrogen isotope ratios of plants were observed. Large interannual variations were found. Observational results showed that plant activity is drived by the variation of soil moisture which is caused by the variation in the amount of precipitation with a time lag.