2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/25/2021 | 2:00 PM - 3:30 PM | HYDROPERIOD EFFECTS ON SEASONAL COMMUNITY ASSEMBLY OF AQUATIC MACROINVERTEBRATES IN LENTIC SYSTEMS OF NORTHERN ARIZONA | Virtual Platform
HYDROPERIOD EFFECTS ON SEASONAL COMMUNITY ASSEMBLY OF AQUATIC MACROINVERTEBRATES IN LENTIC SYSTEMS OF NORTHERN ARIZONA
Aquatic habitats in the arid southwest will likely experience more frequent drying events due to climate change. In northern Arizona, natural aquatic systems are infrequent and isolated, whereas anthropogenic stock ponds are abundant across the landscape. Both of these habitats
vary in hydroperiod, where some dry annually (ephemeral), some remain consistently perennial (permanent), and some dry only in extreme drought years. To evaluate the relative value of these aquatic habitats as refugia for biodiversity, we sampled aquatic macroinvertebrates in natural lentic systems and anthropogenic ponds across three seasons in 2019. We found significant seasonal effects on total abundance, richness, and diversity regardless of habitat type. Natural versus anthropogenic origin had no significant effect on diversity indices. However, hydroperiod had substantial effects on diversity and community composition. In the post-monsoon recovery from summer drying, ponds that were predictably either permanent or ephemeral had higher diversity than ponds that were normally permanent but had experienced extreme drying events in the previous year. Our results suggest that a variety of lentic systems can support aquatic invertebrate diversity, but that extreme events related to climate change can have large and lasting effects.
- Climate change
- Anthropogenic
- Conservation
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Presenters/Authors
Kaitlin Haase
(), Northern Arizona University, kbh233@nau.edu;
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Rebecca Best
(), Northern Arizona University, rebecca.best@nau.edu;
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