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Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
Published on: July 30, 2019
Structural dynamics and robustness of food webs
Phillip P A Staniczenko1, Owen T Lewis, Nick S Jones
1Department of Physics, University of Oxford, Oxford OX1 3PU, UK. phillip.staniczenko@physics.ox.ac.uk
Ecology Letters
|May 21, 2010
Summary
Ecosystems can better withstand species loss when species interactions change, a process called rewiring. Identifying "overlap species" is key to understanding this resilience and buffering capacity against environmental change.
Area of Science:
- Ecology
- Theoretical Ecology
- Food Web Dynamics
Background:
- Food web structure influences ecosystem robustness to secondary extinctions.
- Current models often overlook trophic interaction changes (rewiring) after species loss.
Purpose of the Study:
- Investigate how structural dynamics and rewiring impact food web robustness.
- Identify species categories that enhance ecosystem resilience.
- Quantify the role of rewiring in buffering against species loss.
Main Methods:
- Simulated primary species loss in 12 empirical food webs using realistic removal criteria.
- Modeled novel trophic interactions (rewiring) following predator species loss.
- Compared robustness in simulations with and without structural dynamics.
Main Results:
- Rewiring significantly increases food web robustness to secondary extinctions.
- Identified 'overlap species' that promote robustness through rewiring.
- The proportion of overlap species strongly correlates with increased robustness.
- Species richness and connectance were not correlated with increased robustness.
Conclusions:
- Ecosystems possess compensatory mechanisms that buffer against environmental change.
- Overlap species play a crucial role in facilitating ecosystem resilience.
- Future research should focus on identifying and understanding the function of overlap species.
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