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SpeciesDiversity - Species Diversity Chad R Greene...

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Species Diversity Chad R Greene Freed-Hardeman University BIO321-01FA10: Ecology October 27, 2010
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“Species Diversity” ABSTRACT The efforts of this experiment focused on the geographical distribution and population density of the common grasshopper, Schistocerca Americana [1]. In order to study population density of the grasshoppers, the specimens were captured using the Lincoln and Peterson Index. We made the hypothesis that the mark recapture method was an effective means of estimating the total population density of a given area. The test area that was used consisted of tall grasses and shrubbery that was known to house a fairly large amount of insects, including but not limited to grasshoppers. The area that was sampled measured 30x30m (.09 hectares). This testing area was sampled on two different occasions one week apart. The first of the samples 300 grasshoppers and the second contained 340 grasshoppers, which included 15 recaptured specimens from the first week. The Lincoln/Peterson Index estimated a population of 6,800 grasshoppers within the collection area. This number affirms that the mark recapture method is an effective way for estimating population density.
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INTRODUCTION The experiment involved the capture, marking, and recapture of the American Grasshopper to test the effectiveness of the Lincoln/Peterson Index. The reasoning in
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