Use of 35S to determine the influence of Hexagenia on sulfur cycling in lake sediments |
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| Authors: | G. B. Lawrence M. J. Mitchell |
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| Affiliation: | (1) Brevard County Environmental Engineering Department, 2575 N. Courtenay Parkway, 32952 Merritt Island, FL, USA;(2) Nelson Biological Laboratory, Rutgers University, P. O. Box 1059, 08854 Piscataway, NJ, USA |
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| Abstract: | A new quantitative grab for sampling benthos is described. It is constructed of stainless steel to retard corrosion, and incorporates six features designed to make it outperform other grabs: 1) a frame support; 2) counter-weighted arms; 3) overlapping buckets; 4) upright posts on the frame for addition of weights; 5) a fine mesh cover on each bucket; and 6) a moving elliptical pivot point. These features result in high reliability compared to other grabs, and a somewhat quadrangular bite profile. The model in use digs to 6 cm depth over the entire area sampled, and penetrates to a maximum of 11.5 cm. |
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| Keywords: | grab sampler sediment benthos |
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