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Updated: Mar 13, 2026
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Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
Published on: July 30, 2019
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Exploring species and site contributions to beta diversity in stream insect assemblages
1Finnish Environment Institute, Natural Environment Centre, Biodiversity, Paavo Havaksen Tie 3, 90570, Oulu, Finland. jani.heino@environment.fi.
Oecologia
|October 16, 2016
Summary
Beta diversity partitioning reveals that local contributions of sites (LCBD) relate to species richness, while species contributions (SCBD) are driven by occupancy. Intermediate species occupancy most influences beta diversity in stream insect communities.
Area of Science:
- Community ecology
- Biodiversity research
- Freshwater ecology
Background:
- Beta diversity is crucial for understanding community assembly.
- Beta diversity can be partitioned into local site contributions (LCBD) and species contributions (SCBD).
- The ecological drivers of LCBD and SCBD remain incompletely understood.
Purpose of the Study:
- To investigate the relationships between LCBD and site characteristics.
- To explore the relationships between SCBD and species characteristics.
- To understand the drivers of beta diversity partitioning in stream insect assemblages.
Main Methods:
- Partitioning beta diversity into LCBD and SCBD metrics.
- Statistical analysis of LCBD in relation to species richness.
- Statistical analysis of SCBD in relation to species occupancy, abundance, niche position, niche breadth, and biological traits.
Main Results:
- LCBD was negatively correlated with species richness.
- SCBD was strongly associated with species occupancy, abundance, niche position, and niche breadth.
- A unimodal relationship was observed between SCBD and species occupancy, indicating intermediate occupancy species contribute most to beta diversity.
Conclusions:
- Species richness is a key predictor of local site contributions to beta diversity.
- Species-specific traits, particularly occupancy, are strong drivers of species contributions to beta diversity.
- These findings enhance understanding of beta diversity and have implications for conservation and bioassessment.
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