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Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates
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A precipitation gradient drives change in macroinvertebrate composition and interactions within bromeliads
Laura Melissa Guzman1, Bram Vanschoenwinkel2, Vinicius F Farjalla3
1Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada.
Plos One
|November 29, 2018
Summary
Ecological communities change with environmental gradients, driven by shifts in species and their interactions. This study in bromeliad ecosystems reveals how water volume influences invertebrate community composition and predator interactions.
Area of Science:
- Ecology
- Environmental Science
- Aquatic Ecology
Background:
- Ecological communities exhibit variation across spatial and environmental gradients.
- Changes can manifest as altered species composition, interaction frequency/strength, or interaction presence.
- Bromeliad phytotelm ecosystems offer a tractable model for studying multi-trophic community dynamics.
Purpose of the Study:
- To investigate how environmental gradients influence species composition and interaction strengths in aquatic invertebrate communities.
- To utilize bromeliad phytotelm communities along the Brazilian coast as a model system.
- To explore geographic variation in species pools and interaction strengths.
Main Methods:
- Documented variation in species pools across a geographical climate gradient.
- Employed a Markov network approach to explore geographic variation in species interaction strength.
- Analyzed community composition and interaction differences related to environmental factors like water volume.
Main Results:
- Community composition varied along a water volume gradient within bromeliads, attributed to species turnover.
- Markov network analysis revealed that predator interactions differed based on bromeliad water volume.
- Both species composition and interaction strengths demonstrated changes across the environmental gradient.
Conclusions:
- Multi-trophic communities can shift across environmental gradients through alterations in species composition.
- Environmental factors, such as water volume, significantly impact species interactions within these communities.
- The study highlights the interconnectedness of species and their interactions in shaping community structure along environmental gradients.
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