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Global change re-structures alpine plant communities through interacting abiotic and biotic effects
Courtney G Collins1,2, Sarah C Elmendorf1, Jane G Smith1
1Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado, USA.
Ecology Letters
|June 28, 2022
Summary
Global change impacts alpine plant communities. Competition dynamics, influenced by nitrogen and warming, determine species abundance shifts over time.
Area of Science:
- Ecology
- Environmental Science
- Plant Biology
Background:
- Global change factors like nitrogen addition, warming, and altered snow regimes significantly influence ecological community assembly.
- Understanding species' direct responses to abiotic conditions and indirect responses via biotic interactions is crucial for predicting community dynamics.
Discussion:
- Density-dependent competitive interactions are key drivers of long-term species abundance changes under global change.
- Density-independent environmental factors can limit the growth of dominant species, counteracting competitive advantages.
Key Insights:
- Environmental shifts, particularly nitrogen availability, alter competitive interactions, leading to non-linear species abundance responses.
- Global change can either reorder species dominance or reinforce the success of already dominant species.
Outlook:
- Predicting community assembly outcomes requires integrating both density-dependent and density-independent mechanisms.
- Further research should focus on the interactive effects of multiple global change drivers on ecological communities.
Keywords:
alpinebiotic interactionscompetitiondensity-dependentdensity-independentdominanceglobal changejoint attribute modellingplant communitiesspecies hierarchiesMore Related Videos
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