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| Publication Type:
| Refereed |
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| Author(s): | O'Neill, Kevin M.;
Larson, Deanna P.;
Kemp, William P. |
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| Author Affiliation: | Department of Entomology, Montana State University, Bozeman, Montana |
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| Title: | Sweep sampling technique affects estimates of the relative abundance and community composition of grasshoppers (Orthoptera: Acrididae) |
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| Source: | Journal of Agricultural and Urban Entomology. Vol. 19, No. 3, July 2002, p. 125-131. |
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| Publishing Information: | Clemson, SC: South Carolina Entomological Society, Inc. |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Ecology; Sampling techniques; Population dynamics; Grasshoppers
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| Abstract/Contents: | "Because sweep sampling is the most commonly used method of estimating grasshopper abundance and community composition on rangeland, it is of interest to evaluate its accuracy and precision. Previous studies have concluded that sweep sampling provides fairly accurate estimates of community composition. However, it is possible that differences among nonstandardized sampling techniques result in variable estimates of abundance and species composition among samplers or among different samples taken by the same person. We deliberately varied the sweep sampling technique among samples to evaluate whether the lack of a standardized technique can result in inconsistent estimates of abundance and species frequencies. In one set of analyses, we varied either the height of the net above the ground, the speed of sampling, or the arc of the sweep. Results indicate that estimates of abundance and community composition derived from sweep samples can vary with relatively minor differences in technique. When we evaluated the effect of having two samplers deliberately mimic each other's technique on close parallel transects, no differences were found among the samplers, suggesting that standardization of technique can improve precision." |
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| Language: | English |
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| References: | 15 |
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| Note: | Table |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
O'Neill, K. M., D. P. Larson, and W. P. Kemp. 2002. Sweep sampling technique affects estimates of the relative abundance and community composition of grasshoppers (Orthoptera: Acrididae). J. Agric. Urban Entomol. 19(3):p. 125-131. |
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MSU catalog number: SB 818 .J68 |
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