2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/22/2018 | 10:00 AM - 10:15 AM | HABITAT AND LANDSCAPE EFFECTS ON THE RECOVERY OF LARVAL DRAGONFLY COMMUNITIES FOLLOWING POND DRYING | 420 A
HABITAT AND LANDSCAPE EFFECTS ON THE RECOVERY OF LARVAL DRAGONFLY COMMUNITIES FOLLOWING POND DRYING
Landscape context can affect the recovery of freshwater communities following disturbances such as drying. Community recovery after drying may depend on how well dispersers recolonize habitats, in part driven by their responses to the heterogeneous terrestrial landscape surrounding aquatic habitats. To assess the impacts of landscape type on community reassembly following pond drying, we surveyed larval dragonfly communities over 15 years, in ponds situated among fields and forests. We predicted that forest cover in between ponds and canopy cover at ponds would slow the reassembly of larval communities following drying, by limiting adult dispersal and colonization.
Pond canopy cover reduced the diversity of larval dragonflies across years (p < 0.001), independent of drying regime. Pond canopy cover was positively associated with relative richness after a drying event (p = 0.03), however neither canopy or landscape forest cover affected Shannon diversity (p > 0.1 in both cases). Presence/absence-based community composition changed marginally over time in relation to canopy cover (p = 0.07) and least cost distance (p = 0.08), however abundance-based composition did not change. Canopy cover may therefore affect how semi-aquatic species detect and colonize aquatic habitats following a disturbance.
- Connectivity
- Aquatic-terrestrial Linkage
- Community
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Presenters/Authors
Sarah French
(), University of Toronto Mississauga, sarah.french@mail.utoronto.ca;
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Michael Benard
(), Case Western Reserve University, mfb38@case.edu;
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Jason Hoverman
(), Purdue University, jhoverm@purdue.edu;
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Rick Relyea
(), Rensselaer Polytechnic Institute, relyer@rpi.edu;
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David Skelly
(), Yale University, david.skelly@yale.edu;
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Earl Werner
(), University of Michigan, eewerner@umich.edu;
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Kerry Yurewicz
(), Plymouth State University, klyurewicz@plymouth.edu;
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Shannon McCauley
(), University of Toronto Mississauga, shannon.mccauley@utoronto.ca;
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