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Presented at the NABS Annual meeting, Athens, Georgia, 2003
in Conservation Ecology
Estimation of species richness of macroinvertebrate taxa in headwater streams within the Maryland Piedmont Region
W.O. Lamp and L.C. Alexander. Department of Entomology, University of Maryland, College Park, MD 20742
To aid in the documentation of macroinvertebrate species from headwater streams in the Maryland Piedmont Region, we compared two sampling methods (one through space, the other through time) for determining species richness in three streams with a basin size of about 0.5 sq. km. The streams varied in land use: one forested, another draining agricultural land, and the last draining an urbanized area. We sampled using two approaches for a 50 m reach along each stream: 1) 25 transects each across the stream the width of a D-net, conducted summer, fall, and spring, and 2) three 24-hour drift samplers every 2-3 weeks during one year. The samples were used to develop species accumulation curves and to estimate total species richness within each stream.
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