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The macroinvertebrate fauna of the little river north carolina usa taxa list and seasonal trends

, : The macroinvertebrate fauna of the little river north carolina usa taxa list and seasonal trends. Archiv fuer Hydrobiologie 110(1): 19-44

Monthly benthic macroinvertebrate samples was collected from a single site on the Little River, North Carolina, from September 1983-October 1984. These collections were used to test a standardized qualitative sampling method and to determine normal seasonal trends. The qualitative sampling technique was quite effective, with individual samples having a taxa richness of 89-107. Approximately 271 species were collected from this site. The most rapid seasonal changes occurred during March-May, with taxa richness values remaining relatively constant during the remainder of the year. At any one time, a large proportion of the population is in some resting stage (egg, pupa) or is inaccessible to normal sampling techniques. A large degree of temporal separation was observed for the Little River fauna, supporting the idea that competition is, or has been, a major structuring mechanism for stream communities. Comparisons with other North Carolina streams suggested that total species richness is similar for a wide variety of lotic systems. Taxa richness values, tabulated by major taxonomic groups, appear to be similar in streams from the same ecoregion, but differences are observed between ecoregions.

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