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Related Experiment Videos

Phenotypic diversity and ecosystem functioning in changing environments: a theoretical framework.

J Norberg1, D P Swaney, J Dushoff

  • 1Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA. jon.norberg@ecology.su.se

Proceedings of the National Academy of Sciences of the United States of America
|September 6, 2001
PubMed
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Biodiversity is key for ecosystems. Modeling species

Area of Science:

  • Ecology
  • Theoretical Ecology
  • Ecosystem Dynamics

Background:

  • Biodiversity is crucial for ecosystem functioning, especially in changing environments.
  • Existing theoretical frameworks struggle to integrate diversity into classical ecosystem theory with mechanistic principles.

Purpose of the Study:

  • To extend quantitative genetics approaches to ecosystem functioning by modeling species' phenotypic means and variances.
  • To develop a framework linking phenotypic variance within functional groups to their environmental change response.

Main Methods:

  • Modeling the means and variances of phenotypes within species groups.
  • Applying quantitative genetics principles to ecosystem functioning.

Main Results:

Related Experiment Videos

  • Phenotypic variance within functional groups is linearly related to their capacity to adapt to environmental shifts.
  • High phenotypic variance can lead to greater long-term ecosystem productivity than monocultures, despite short-term decreases.
  • Accelerating environmental change may cause discontinuous species succession, linked to diversity and disturbance regimes.

Conclusions:

  • Phenotypic variance is a critical factor in ecosystem resilience and long-term productivity.
  • Anthropogenic activities influencing diversity and disturbance regimes can drive discontinuous ecological changes.
  • New modeling techniques for aggregate species behavior offer novel ecosystem analysis avenues.