2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 2:30 PM - 2:45 PM | GLOBAL TRENDS OF MACROINVERTEBRATE FUNCTIONAL GROUP DOMINANCE IN ARID ROCK POOLS AND FUTURE PROJECTIONS | 250 DE
GLOBAL TRENDS OF MACROINVERTEBRATE FUNCTIONAL GROUP DOMINANCE IN ARID ROCK POOLS AND FUTURE PROJECTIONS
Rock pools are important surface waters in arid regions. Hydroperiod is a primary limiting factor for rock pool aquatic macroinvertebrate communities, as species must complete their life cycles or disperse aerially before drying occurs. Passive dispersers, often habitat specialists, can survive drying in situ via dormancy, while active dispersers can aerially, or terrestrially, travel away from drying pools. As climate change reduces hydroperiod length, the relative abundances of active vs passive dispersers may shift, which could have cascading effects on ecosystem function. Here, we analyze taxonomic data (species lists) obtained from 24 published studies to assess macroinvertebrate community structure (i.e. relative abundances of active dispersers, passive dispersers, and functional feeding groups) in rock pools across the globe. Taxa were equally comprised of active and passive dispersers. Active dispersers were predominately predators (60%) and gatherers (33%), but passive dispersers were mostly filterers (39%), gatherers (29%), and scrapers (21%). Shorter hydroperiods could eliminate passive disperser taxa, thus disrupting ecosystem functions these taxa provide, such as fine organic matter processing. These results provide a foundation for future work (e.g. experimental manipulations) to quantify how climate change will alter ecosystem function in rock pools.
- Functional Feeding Groups
- Intermittency
- ClimateChange
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Presenters/Authors
Susan Washko
(), University of Arizona, swashko@email.arizona.edu;
ASHA DISCLOSURE:
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Michael Bogan
(), School of Natural Resources and the Environment, The University of Arizona, mbogan@email.arizona.edu;
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Nonfinancial -