2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/25/2021 | 8:30 AM - 10:30 AM | WATER QUALITY DETERMINANTS OF THE DENSITY OF ZOOPLANKTON SUBSIDY TO A STREAM WITH MULTIPLE IMPOUNDMENTS | Virtual Platform

WATER QUALITY DETERMINANTS OF THE DENSITY OF ZOOPLANKTON SUBSIDY TO A STREAM WITH MULTIPLE IMPOUNDMENTS

Damming of streams inserts a lentic system (a reservoir) into a lotic system (the stream), causing alterations to downstream hydrological, biogeochemical, and ecological attributes of streams. One way in which reservoirs alter ecological interactions is through the creation of planktonic subsidies that cause a shift in downstream community composition toward filter feeders. Filter feeders obtain resources as a function of the density of those resources in the environment. Measuring zooplankton density is a labor-intensive process, so in this study we assess whether the density of zooplankton subsidies can be predicted by water quality variables, which would be a much more efficient way of quantifying zooplankton subsidy. We monitored zooplankton subsidy from four polymictic reservoirs and assessed 22 water quality variables for their ability to predict subsidies. Using linear regression and modeling methods, 48.3% of the variation in zooplankton subsidy can be predicted using a combination of 7 water quality variables. We detected three distinct water quality states during the study, but differences in water quality state did not significantly affect the density of zooplankton subsidy.

Stream
Nutrient cycling
Monitoring

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Presenters/Authors

Dominic Ruggiero (), Rowan University, ruggierod1@students.rowan.edu;