2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/26/2021 | 8:30 AM - 10:30 AM | THE ROLES OF LOCAL, REGIONAL AND SPATIAL FACTORS IN SHAPING ZOOPLANKTON METACOMMUNITIES: IMPLICATIONS FOR THE BIOASSESSMENT OF LAKES IN NORTHERN GREAT PLAINS | Virtual Platform

THE ROLES OF LOCAL, REGIONAL AND SPATIAL FACTORS IN SHAPING ZOOPLANKTON METACOMMUNITIES: IMPLICATIONS FOR THE BIOASSESSMENT OF LAKES IN NORTHERN GREAT PLAINS

In the face of climate warming and intensifying land-use changes affecting the lakes of northern Great Plains, a better understanding of the processes regulating the lake biota is important. While local environmental factors were traditionally considered as sole determinants of lake community assembly, the importance of regional factors and dispersal processes have received limited attention. Based on a synoptic survey of 78 prairie lakes across Saskatchewan, we evaluated the relationships of local (water chemistry, morphometric, watershed characteristics), regional (climate, land use) and spatial factors with zooplankton species composition. To test and quantify the relative importance of these factors, we performed ordination analyses, spatial modeling, and variation partitioning. Significant associations between species composition and local factors including salinity, productivity, maximum depth, hydraulic conductivity, percentage shrub-land, and percentage broadleaf forest in the watershed were detected. In addition, species compositional variation was significantly related to regional differences in urbanization and agricultural intensity, indicating the potential of zooplankton communities to reflect the effects of regional land-use changes. Variation partitioning indicated a considerable importance of spatially contingent, dispersal processes in structuring zooplankton communities. Thus, dispersal processes may partially offset zooplankton community responses to environmental changes.

Salinity
Land use
Biological effects

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Presenters/Authors

Buddhine Meegahage (), University of Regina, buddhine.meegahage@gmail.com;