Diversity and ecological aspects of aquatic insect communities from montane streams in southern Brazil/Diversidade e aspectos ecológicos de comunidades de insetos aquáticos em riachos de uma região montanhosa, sul do Brasil

• Published in: Acta limnológica brasiliensia Vol. 26; no. 2; p. 186
• Main Authors: Braun, Bruna Marmitt, Pires, Mateus Marques, Kotzian, Carla Bender, Spies, Marcia Regina
• Format: Journal Article
• Language: English
• Published: Botucatu Associação Brasileira de Limnologia 01-04-2014
• ISSN: 0102-6712; 2179-975X

In this study, the diversity of Ephemeroptera, Plecoptera, Trichoptera and Coleoptera communities was surveyed in the Toropi River basin, a watershed localized in a slope region, in southernmost Brazil. The influence of some local abiotic factors on the most common genera was also analyzed. Samplings were conducted at 40 sites in 1st-4th order streams, along a short elevation gradient (70-500 m), with a Surber sampler. Water physico-chemical factors, as well as substrate type, were obtained at each site. At all, 5,320 specimens were collected, belonging to 18 families and 52 genera. The caddisflies Austrotinodes and Celaenotrichia, and an undescribed Elmidae, Genus M, are new records for the region. The caddisfly Smicridea was the most frequent genus in the study area. The mayflies Camelobaetidius, Paracloeodes and Americabaetis were influenced by stream order. The high diversity found in the study area, compared to other Brazilian regions, reflects the environmental heterogeneity in the region.