2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 2:30 PM - 2:45 PM | REGIONAL DIFFERENCES IN STREAM NETWORK GEOMETRY MEDIATE THE SPATIAL PATTERNING AND EXTENT OF AQUATIC-DERIVED RESOURCES IN TERRESTRIAL ENVIRONMENTS | 320
REGIONAL DIFFERENCES IN STREAM NETWORK GEOMETRY MEDIATE THE SPATIAL PATTERNING AND EXTENT OF AQUATIC-DERIVED RESOURCES IN TERRESTRIAL ENVIRONMENTS
The redistribution of materials and energy across ecosystem boundaries suggests ex situ factors contribute to local food webs. Emergent insects develop in aquatic environments and shuttle resources to terrestrial systems as winged adults dispersing overland. The distance they travel from the stream is contingent the production and composition of the benthic macroinvertebrate community. At the watershed scale, the configuration of the entire river network could influence the amount of contact between aquatic and terrestrial systems and create locally intensified aquatic-terrestrial interactions. We estimated the proportion of a watershed receiving aquatic inputs from multiple stream sources for ~1,300 stream networks across the contiguous US and tested the relative roles of network geometry and several hydroclimate variables in defining these patterns. Up to 36% of the watershed could be subjected to 25% of the insect biomass exported form a stream and that the spatial extent was strongly related to stream network drainage density, which differed among ecoregions. This work complements theoretical developments with realistic stream networks sampled across a broad spatial extent and demonstrates the hydrogeomorphic template could constrain the spatial extent and patterning of aquatic resources in terrestrial ecosystems.
- Geomorphology
- Aquatic-terrestrial Linkage
- Riparian
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Presenters/Authors
Darin Kopp
(), University of Oklahoma, darinkopp@gmail.com;
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Daniel Allen
(), University of Oklahoma, dcallen@ou.edu;
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