2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/21/2019 | 2:15 PM - 2:30 PM | COMMUNITIES ASSOCIATED WITH THE FUNCTIONAL PROCESS ZONE SCALE: A CASE STUDY OF STREAM MACROINVERTEBRATES | 250 DE

COMMUNITIES ASSOCIATED WITH THE FUNCTIONAL PROCESS ZONE SCALE: A CASE STUDY OF STREAM MACROINVERTEBRATES

Rivers are being increasingly analyzed from a holistic scale focus, imposing the challenge to establish a clear sampling framework that integrates complex valley-to-reach hydrogeomorphic features. Here, we address this challenge by examining macroinvertebrate communities of different hydrogeomorphic patches, or Functional Process Zones (FPZs). We delineated FPZs using a self-emergent clustering method that classifies segments of rivers with similar hydrogeomorphic characteristics. We sampled macroinvertebrates across different FPZs and examined the taxonomic and functional organizations of their communities. We examined the main drivers of community compositional community dissimilarity as ?-diversity and nestedness components. We decomposed functional diversity into the Eltonian and Grinnellian aspects of the ecological niche, as we expected differences between FPZs to be mainly driven by the Eltonian aspect of the ecological niche as it relates to the interactions of macroinvertebrates with their direct environment, and thereby reflecting the many ecological processes defining an FPZ. Finally, we assessed the relative contributions of in-stream and watershed-scale environmental parameters in structuring these communities. Therefore, we partitioned variances between sets of environmental parameters of different spatial scales in explaining the structure and functional organization of macroinvertebrate communities.

Invertebrate
Biodiversity
Distribution

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Presenters/Authors

Alain Maasri (), The Academy of Natural Sciences of Drexel University, alainmaasri@gmail.com;