Rader, R.B. and C.J. Richardson. 1993. The effects of agricultural run-off on small fish and macroinvertebrates in the Everglades. Pp. 462-465 in: Landin, M.C. (ed.), Wetlands: Proceedings of the 13th Annual SWS Conference, New Orleans, LA, June 1992. SWS South Central Chapter, Utica, Mississippi. 990 pp.

Abstract: One of the most highly publicized fears associated with nutrient enrichment in the Florida Everglades is the loss of wading bird populations because of a decline in the density and diversity of macroinvertebrates. The object of this study was to determine the effects of nutrient enrichment on oxygen, pH, and especially macroinvertebrates along a nutrient enrichment gradient in the Everglades. Although 24-hr. oxygen profiles were lower within enriched compared to unenriched habitats, macroinvertebrate diversity and density [were] higher. To date, 96 and 63 taxa have been identified from enriched and unenriched sites, respectively. The density of macroinvertebrates (#’s/m3), averaged across all sampling dates, is 2.9 X greater within enriched compared to unenriched sites. Although some analyses are not yet completed, these data indicate that nutrient enrichment has not caused harmful foodweb effects.

Reproduced by permission

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