2022 Early Hearing Detection & Intervention Virtual Conference

March 13 - 15, 2022

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5/26/2021  |   8:30 AM - 10:30 AM   |  INVESTIGATING THE INFLUENCE OF HABITAT COMPLEXITY ON MACROINVERTEBRATE METACOMMUNITY DIVERSITY IN A WILDERNESS RIVER NETWORK   |  Virtual Platform

INVESTIGATING THE INFLUENCE OF HABITAT COMPLEXITY ON MACROINVERTEBRATE METACOMMUNITY DIVERSITY IN A WILDERNESS RIVER NETWORK

In river networks, the complexity of the habitat mosaic supporting macroinvertebrates may mediate metacommunity dynamics, dictating not only community membership, but also how communities interact and combine at multiple spatial scales. Alpha diversity of communities may be influenced by the characteristics of the larger metacommunity, and these relationships may occur at nested scales in a river-network, with reciprocal consequences for gamma diversity. We evaluated the influence of spatial complexity on macroinvertebrate metacommunities in a free-flowing, 6th-order river network in the central Idaho wilderness. Mainstem and tributary habitats are arranged throughout this network into confluence “complexes”, areas where multiple confluences occur in close proximity. We sampled the mainstem and 4 such complexes (10 tributary and 12 mainstem sites), totaling 66 distinct habitat patches. We hypothesized that habitats combine to support increasingly diverse communities at both the confluence-complex and river-network scales. Using a combinatory analytical framework, communities were aggregated in a randomized, sequential, iterative fashion into simulated forms of increasingly complex habitat mosaics. Preliminary results suggest that gamma diversity at the confluence-complex and river-network scale benefits from an increasingly complex habitat mosaic that supports high beta diversity from species turnover among communities.

  • Connectivity
  • Geomorphology
  • Freshwater continuum

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Presenters/Authors

Sawyer Finley (), Idaho State University, sawyerfinley@isu.edu;


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Colden Baxter (), Idaho State University, baxtcold@isu.edu;


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