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Ecosystem multifunctionality in metacommunities.

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Dispersal is key for ecosystem multifunctionality. Intermediate dispersal rates maintain diversity and functions across landscapes by balancing species sorting and mass effects, crucial for ecological management.

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Area of Science:

  • Ecology
  • Metacommunity Dynamics
  • Ecosystem Functioning

Background:

  • Ecosystem multifunctionality, the simultaneous provision of multiple ecosystem functions, is influenced by community attributes like diversity and composition.
  • In metacommunities, species dispersal between local patches is critical for adapting to environmental changes and maintaining community properties.

Purpose of the Study:

  • To investigate how species dispersal influences the relationship between community diversity, composition, and ecosystem multifunctionality in a metacommunity.
  • To elucidate the mechanisms by which dispersal affects ecosystem multifunctionality, specifically species sorting and mass effects.

Main Methods:

  • Utilized a consumer-resource metacommunity model based on resource competition.
  • Simulated scenarios with species possessing differing functional traits and environmental niches.

Main Results:

  • Metacommunity multifunctionality is highly dependent on dispersal, which sustains community diversity under changing environmental conditions.
  • Dispersal enhances multifunctionality through species sorting (preserving diversity and productivity) and mass effects (allowing persistence in suboptimal habitats).
  • A unimodal relationship exists between dispersal rate and metacommunity multifunctionality, with optimal function at intermediate dispersal levels.

Conclusions:

  • Metacommunity processes, particularly dispersal, are significant drivers of ecosystem multifunctionality.
  • Effective management of multiple ecosystem functions necessitates considering landscape connectivity and dispersal dynamics.
  • While species sorting stabilizes functions regionally, it can increase temporal variability locally.