2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 12:00 PM - 12:15 PM | VARIATION IN MACROINVERTEBRATE PASSIVE SAMPLING DEVICES FOR SOUTHEASTERN COASTAL PLAIN RIVERS | 410 A
VARIATION IN MACROINVERTEBRATE PASSIVE SAMPLING DEVICES FOR SOUTHEASTERN COASTAL PLAIN RIVERS
Techniques for sampling macroinvertebrates in large rivers have not been standardized by many agencies. Variation within sampling devices can affect metric calculations used in bioassessments. This study quantifies variation in passive samplers deployed in the Savannah and Ogeechee Rivers within the Southeastern Coastal Plain. Leaf packs, snag bags, and Hester-Dendy samplers were deployed at three sites in each river for ~30d. We calculated 39 common bioassessment metrics to evaluate variation within each sampler. Average mean square error (MSE) of metric calculations was significantly different within samplers; snag bags exhibited 27% higher MSE than leaf packs (t38=2.6 P=0.01). MSE of methods adding variation within sites differed significantly between snag bags and Hesters (t38 =3.7, P=<0.01); snag bags exhibiting the highest MSE and Hesters the lowest, with 47% difference. Sampler variation increases when site variation is accounted for. However, variation scoring for samplers was not consistent after adding sites; leaf packs exhibited the least amount MSE within samplers, but Hesters exhibited the least amount of MSE after sites were added. Determining the precision of sampling devices will be an important step towards developing standard operating procedures for bioassessment of large rivers.
- Invertebrate
- Water Quality
- Community
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Presenters/Authors
Kelsey Laymon
(), Georgia Southern University, kelsey.laymon@icloud.com;
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Damon Mullis
(), Ogeechee Riverkeeper, damon@ogeecheeriverkeeper.org ;
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Checo Colon-Gaud
(), Georgia Southern University, jccolongaud@georgiasouthern.edu;
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