2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/05/2017 | 3:15 PM - 3:30 PM | AN OVERVIEW OF SAMPLING DESIGNS FOR ASSESSING MUSSEL ASSEMBLAGES IN LARGE RIVERS | 305A
AN OVERVIEW OF SAMPLING DESIGNS FOR ASSESSING MUSSEL ASSEMBLAGES IN LARGE RIVERS
Over the past 50 years, sampling for freshwater unionid mussels has evolved from qualitative searches for species composition, presence/absence, and relative abundance to quantitative probabilistic designs. Most current sampling designs combine reconnaissance, qualitative, semi-quantitative, and quantitative sampling techniques. Reconnaissance, semi-quantitative, and qualitative sampling are considered informal, as data obtained from these methods is biased by the sampler’s ability to find mussels and field conditions, and data is difficult to compare statistically over space and time. However, these approaches are useful for efficiently determining distribution and detecting rare species. Quantitative sampling is more labor intensive, but can be applied to a variety of probabilistic designs that are statistically comparable temporally and spatially. How these techniques are applied is dependent on study objectives and data goals. “Normal” unionid abundance and distribution, which vary with stream size and geographic location, should also be considered in selecting the appropriate sample techniques. Many states have developed sampling protocols to standardize sampling and provide guidance on the level of effort required to achieve data goals within their geographic area.
- C05 Unionid Ecology
- C06 Large River Ecology
- S06 Advances in research to conserve and restore native freshwater mollusks
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Presenters/Authors
Heidi Dunn
(), Ecological Specialists, Inc., HDunn@ecologicalspecialists.com;
ASHA DISCLOSURE:
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Nonfinancial -