Rader, R.B. 1994. Macroinvertebrates of the northern Everglades: Species composition and trophic structure. Florida Scientist 57:22-33.

Abstract. Macroinvertebrates of the northern Everglades are adapted to temporary waters with fluctuating oxygen concentrations and periodic high (> 35.0 C) temperatures. Despite harsh conditions, the macroinvertebrate assemblage was surprisingly diverse with species richness values similar to well-oxygenated, lotic ecosystems. One hundred and forty-eight taxa of macroinvertebrates were identified from sloughs in the northern Everglades. Although the diversity and density of macroinvertebrates in sloughs were dominated by Chironomidae, Gastropoda, and Coleoptera, the amphipod Hyallella azteca was the most abundant species collected. Macroinvertebrate diversity and density was reduced in dense sawgrass. Almost all taxa, however, were well represented within man-made canals where amphipods and the freshwater shrimp Palaemonetes paludosus were extremely abundant. Trophic categories were dominated by grazers and collector-gatherers. Energy flow was equally distributed through grazer and detritivore pathways. Macroinvertebrates of the northern Everglades are characterized by common species from North America and the southeastern United States with a few colonists from Central and South America. However, two species, the most abundant snail Planorbella duryi and the mayfly Callibaetis floridanus, are endemic to the Florida peninsula.

Reproduced by kind permission from The Florida Academy of Sciences, Inc.

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