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SUBSURFACE AND SURFACE SAMPLING OF BENTHIC INVERTEBRATES IN TWO STREAM1, 2

D. S. Radford, R. Hartland-Rowe

Open publisher page 21 citations

Abstract

A new subsurface sampling technique for collecting macroinvertebrates in gravel‐bottom streams is described. The cylinder sampler collects all species whose presence is indicated by a Surber sampler, but the percentage composition of the population sampled is different. With this method, a far larger number of benthic invertebrates is obtained, making it possible to reduce the number of samples to 10 or less and yet obtain estimates within 20% of the true mean of the benthic invertebrate population inhabiting the top 17.5 cm of substrate.

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What this paper is about

A new subsurface sampling technique for collecting macroinvertebrates in gravel‐bottom streams is described. The cylinder sampler collects all species whose presence is indicated by a Surber sampler, but the percentage composition of the population sampled is different. With this method, a far larger number of benthic invertebrates is obtained, making it possible to reduce the number of samples to 10 or less and yet obtain estimates within 20% of the true mean of the benthic invertebrate population inhabiting the top 17.5 cm of substrate.

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Available abstract

A new subsurface sampling technique for collecting macroinvertebrates in gravel‐bottom streams is described. The cylinder sampler collects all species whose presence is indicated by a Surber sampler, but the percentage composition of the population sampled is different. With this method, a far larger number of benthic invertebrates is obtained, making it possible to reduce the number of samples to 10 or less and yet obtain estimates within 20% of the true mean of the benthic invertebrate population inhabiting the top 17.5 cm of substrate.

Key concepts: Benthic zone, Invertebrate, Sampling (signal processing), Substrate (aquarium), Environmental science, Population, STREAMS, Ecology

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