2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | EAST OR WEST, NESTS ARE BEST: DRAMATICALLY DIFFERENT DRAGONFLY HABITATS HAVE SURPRISINGLY SIMILAR NESTEDNESS (NEATO!) | Virtual Platform
EAST OR WEST, NESTS ARE BEST: DRAMATICALLY DIFFERENT DRAGONFLY HABITATS HAVE SURPRISINGLY SIMILAR NESTEDNESS (NEATO!)
Ecologists have long sought to explain species richness patterns in which less diverse habitat patches predictably contain only subsets of species found in more diverse communities. Although such nestedness patterns are sometimes observed locally, direct comparisons of analogous communities in contrasting ecosystems are uncommon despite representing excellent opportunities to test the generality of island biogeography theory predictions. To determine if larval odonate (dragonfly and damselfly) communities in dissimilar ecosystems exhibit similar richness patterns, we collected exuviae (larval exoskeletons) from 27 saline sinkholes in New Mexico and 21 freshwater ponds in Rhode Island. Nestedness analyses reveal that both systems support significantly nested larval communities and regression analyses suggest that species richness tends to increase with increasing pond size. However, the environmental filtering mechanisms driving these patterns appear to differ: species’ idiosyncratic water salinity tolerances and predation pressure from larger larval odonates are important in the desert sinkholes, while the degree of surrounding urbanization in the temperate pond system may drive those species distribution patterns. This study illustrates that superficially similar nestedness patterns in analogous systems may arise from very different local-scale environmental forces.
- Ecosystem
- Ecological dynamics
- Habitat
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Presenters/Authors
Karen Gaines
(), University of Kansas, khgaines@hotmail.com;
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Maria Aliberti-Lubertazzi
(), RHODE ISLAND SCHOOL OF DESIGN, MALIBERT@RISD.EDU;
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