EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021

(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)

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5/26/2021 | 8:30 AM - 10:30 AM | CLIMATIC ARIDITY INCREASES TEMPORAL NESTEDNESS OF INVERTEBRATE COMMUNITIES IN NATURALLY DRYING RIVERS | Virtual Platform

CLIMATIC ARIDITY INCREASES TEMPORAL NESTEDNESS OF INVERTEBRATE COMMUNITIES IN NATURALLY DRYING RIVERS

Intermittent rivers are pervasive across nearly every climate type. However, it is unknown whether biodiversity responses to drying are similar across different climates. We gathered a global dataset capturing responses of aquatic invertebrate communities to river drying, which includes 112 sites spanning a gradient of climatic aridity. We measured the effects of river drying on taxonomic richness, temporal ??diversity (turnover and nestedness components, and relative abundance of aquatic invertebrates with strategies that confer resilience (or resistance) to drying. Taxonomic richness recovered from drying similarly across the aridity gradient and the turnover component of ??diversity (i.e. species replacements over time) largely accounted for differences in community composition before versus after drying. However, increasing aridity was associated with greater nestedness?driven compositional changes at intermittent sites – that is, after drying communities became subsets of those before drying. Thus, climatic context can explain variation in community responses to drying, suggesting that increased aridity will constrain biodiversity responses at regional scales. Considering climatic context in hydroecological research may help improve predictions of the local impacts of hydrological disturbance by identifying climate regions where communities are more (or less) sensitive to extremes.

Ecohydrology
IRES
Climate variability

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Presenters/Authors

Ross Vander Vorste (), Rivers Study Center and Department of Biology - University of Wisconsin La Crosse , vandervorste.ross@gmail.com;