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Linking spatial self-organization to community assembly and biodiversity.

Bidesh K Bera1, Omer Tzuk2, Jamie Jr Bennett1

  • 1Department of Solar Energy and Environmental Physics, BIDR, Ben-Gurion University of the Negev, Sede Boqer Campus, Israel.

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Dryland plant communities under climate change can reassemble or self-organize spatially. Spatial self-organization helps maintain species and functional diversity, buffering against drought stress and informing ecosystem management.

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community structureecologyplant communitiesresponse to climate changetrait-based approachvegetation pattern formation

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Area of Science:

  • Ecology
  • Environmental Science
  • Mathematical Biology

Background:

  • Temporal climate shifts to drier conditions create environmental stresses for plant communities.
  • These stresses can lead to community reassembly, threatening ecosystem services.
  • Conversely, self-organization in spatial patterns can mitigate these stresses.

Purpose of the Study:

  • To investigate the complex interplay between community reassembly and spatial self-organization in dryland plant communities.
  • To understand how these processes respond to increasing water-deficit stress.
  • To explore the implications for ecosystem services and community structure.

Main Methods:

  • Utilized a spatio-temporal model of dryland plant communities.
  • Employed a trait-based approach to analyze community responses.
  • Simulated increasing water-deficit stress.

Main Results:

  • Spatial patterning was found to counteract shifts towards stress-tolerant species and reverse functional diversity loss.
  • Spatial self-organization effectively buffered the impact of further stress on community structure.
  • Identified multistability ranges between uniform and patterned community states.

Conclusions:

  • Spatial self-organization is a crucial mechanism for maintaining dryland community structure and function under drought.
  • The findings suggest novel, non-uniform ecosystem management strategies.
  • These strategies can balance the provisioning of ecosystem services with the preservation of community integrity.