Kardol, P., Todd, D. E., Hanson, P. J. & Mulholland, P. J. (2010): Long-term successional forest dynamics: species and community responses to climatic variability. Journal of Vegetation Science 21: 627-642.

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Reference: 
Kardol, P., Todd, D. E., Hanson, P. J. & Mulholland, P. J. (2010): Long-term successional forest dynamics: species and community responses to climatic variability. Journal of Vegetation Science 21: 627-642.
Short reference: 
Kardol et al. (2010)
First author: 
Kardol, Paul
Abstract: 

Long-term successional forest dynamics: species and community responses to climatic variability
Paul Kardol, Donald E. Todd, Paul J. Hanson & Patrick J. Mulholland

Abstract:
Question: Are trees sensitive to climatic variability, and do tree species differ in their responses to climatic variability? Does sensitivity of forest communities to climatic variability depend on stand composition?
Location: Mixed young forest at Walker Branch Watershed near Oak Ridge, East Tennesse, USA.
Methods: Using a long-term dataset (1967-2006), we analyzed temporal forest dynamics at the tree and species level, and community dynamics for forest stands that differed in initial species composition (i.e., chestnut oak, oak-hickory, pine, and yellow poplar stands). Using summer drought and growing season temperature as defined climate drivers, we evaluated relationships between forest dynamics and climate across levels of organization.
Results: Over the four-decade study period, forest communities underwent successional change and substantially increased in biomass. Variation in summer drought and growing season temperature contributed to temporal biomass dynamics for some tree species, but not for others. Stand-level responses to climatic variability were related to the responses of component species, except in pine stands. Pinus echinata, the dominant species in pine stands, decreased over time due to periodic outbreaks of pine bark beetle (Dendroctonus frontalis). These outbreaks at Walker Branch could not be directly related to climatic conditions.
Conclusions: The results indicate that sensitivity of developing forests to climatic variability is stand type-dependent, and hence is a function of species composition. However, in the long term, direct effects of climatic variability on forest dynamics may be small relative to autogenic successional processes or climate-related insect outbreaks. Empirical studies testing for interactions between forest succession and climatic variability are needed.

Címszavazva - GE

forest dynamic, gap dynamic, succession
forest ecology
climate: climate change
climate: microclimate, climate of stand
Notes: 

Long-term successional forest dynamics: species and community responses to climatic variability
Paul Kardol, Donald E. Todd, Paul J. Hanson & Patrick J. Mulholland

Tartalom:
Introduction
Methods
Site description
Tree diameter measurements
Biomass calculations
Forest stand types
Climatic factors
Data analyses
Statistical analyses
Results
Climatic variability
Individual tree species responses
Forest stand responses
Discussion
Conclusions and Implications
Acknowledgements
References
Supporting Information

Climate change; DBH; Global change; Growth; Insect outbreaks; Mortality; Palmer Drought Severity Index (PDSI); Precipitation; Summer drought; Temperature

Címszavazva - GE

Journal: 
Journal of Vegetation Science
Location: 
ER Archívum (2010/P-010)
Type: 
scientific paper, conference (full) paper