Resilience of forest ecosystems to climate change
A. G. DYUKAREV, N. V. KLIMOVA, A. N. NIKIFOROV, N. A. CHERNOVA, S. G. KOPYSOV
Institute of Monitoring of Climatic and Ecological Systems SB RAS, Tomsk, Russia
Keywords: forest ecosystems, edaphotop, succession, phytocenosis, productivity, soil, humus, climate, stability
Abstract
Long-term studies of the dynamics of forest ecosystems in different landscape-geomorphological conditions have shown their spatial heterogeneity, the dominance of forests at different stages of restoration. A close relationship with soil formation in the restoration cycles of the forest ecosystem is noted: soil degradation in the phase of climax coniferous forest and restoration in the phase of derivative deciduous forests. It was found that the duration of the succession is the main factor in the sustainability of forest ecosystems. The recovery time is determined by the conditions of the edaphotop, the biological characteristics of the forest-forming species and varies from 150-600 years, which exceeds the duration of regional (secular and intra-secular) climatic cycles. At the same time, the complex structure of the humus profile of soils indicates a change in landscape conditions associated with global climate changes in millennial cycles. Anthropogenic transformations shift the ecosystem out of balance, which significantly delays its restoration or makes it unattainable.
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