Analysis of urban impacts on aquatic habitats in the central Amazon basin: Adult odonates as bioindicators of environmental quality |
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| Institution: | 1. Coordenação de Biodiversidade, Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, Petrópolis, CEP 69067-375 Manaus, Amazonas, Brazil;2. Laboratório de Ecologia e Conservação, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Correia, N° 1 Bairro Guamá, CEP 66.075-110 Belém, Pará, Brazil;1. Office de l’Environnement de la Corse, Observatoire – Conservatoire des Insectes de Corse, Lieu-dit “Lergie”, RN 200, F-20250 Corte, France;2. Université de Corse, UMR SPE, F-20250 Corte, France;3. Office de l’Environnement de la Corse – Observatoire, Conservatoire des Insectes de Corse, F-20250 Corte, France;1. UMR 7204 (MNHN-CNRS-UPMC), Laboratoire Centre d''Ecologie et des Sciences de la Conservation, Muséum National d''Histoire Naturelle, CP 51, 55 rue Buffon, 75005 Paris, France;2. Natureparif, 84 rue de Grenelle, 75007 Paris, France;3. UMR 5119 (CNRS-IFREMER-UM2-IRD), Laboratoire Ecologie des Systèmes Marins et Côtiers, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France;1. Department of Biology and Ecology/Institute of Environmental Technologies, Faculty of Science, University of Ostrava, Chittussiho 10, 71000 Ostrava, Czech Republic;2. Department of Zoology, Fisheries, Hydrobiology and Apiculture, Mendel University in Brno, Zemědělská 1, 61300 Brno, Czech Republic;3. Department of Vegetation Ecology, Institute of Botany CAS, Lidická 25/27, 60200 Brno, Czech Republic;1. Universidade Federal do Tocantins, Campus Universitário Araguaína, Cimba, Biologia, CEP: 77.838-824, Araguaína TO, Brazil;2. Universidade Federal de Goiás, Campus Samambaia, Instituto de Ciências Biológicas, Departamento de Biologia Geral, Laboratório de Ecologia Teórica e Síntese, 74001-970, Goiânia GO, Caixa Postal: 2424, Brazil;1. Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK;2. Amazon Institute of People and the Environment (Imazon), Rua Dom Romualdo de Seixas 1668, 11° andar, CEP 66.055-200, Belém, Pará, Brazil;3. Stockholm Environment Institute, Linnégatan 87D, Stockholm, 104 51, Sweden;4. MHR Consultoria, Residencial Parquelândia, Alameda dos Sorrisos, Quadra F, casa 02, CEP: 66633-090, Belém, Pará, Brazil;5. Terras App Soluções, Rua Antonio Barreto, 130, Sala: 1508, Umarizal, CEP 66055-050, Belém, Pará, Brazil;1. Department of Geosciences, University of Padova, Via Gradenigo 6, 35131 Padova, Italy;2. Corpo Forestale dello Stato, Centro Nazionale per lo Studio e la Conservazione della Biodiversità Forestale “Bosco Fontana”, Strada Mantova 29, 46045 Marmirolo (MN), Italy;3. E Mach Foundation, Research and Innovation Centre, Via E. Mach 1, 38100 San Michele all’Adige (TN), Italy |
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| Abstract: | Thirty streams were surveyed in urban and natural settings in the municipality of Manaus in the central Amazon basin (Brazil) with the objective of identifying the species of adult odonates that can be used as bioindicators of environmental quality. The data collected were used to test the hypothesis that species in the suborder Zygoptera are indicators of better-preserved environments due to their smaller body sizes and reduced tolerances to habitat modification, whereas species in the suborder Anisoptera were presumed to be indicators of impacted habitats with no vegetation. The habitats were classified as preserved, intermediate, and degraded, based on their environmental characteristics. A total of 908 specimens were collected, representing 60 species. The results of the indicator value (IndVal) identified 13 species as indicators of environmental quality, of which nine were typical of preserved habitats, two of intermediate habitats, and four of modified habitats (intermediate or degraded). Odonate species richness declined with increasing urbanization, a pattern also presented by the zygopterans, although anisopteran species richness was higher in intermediate habitats. Zygopteran species showed high fidelity/specificity for preserved habitats, although a small number of the species of this suborder showed a similar relationship with intermediate or degraded habitats, whereas anisopterans were associated only with disturbed habitats (intermediate and degraded). Overall, the results indicate that the diagnosis of the adult odonate community can provide a rapid and effective tool for evaluation of environmental quality. As many species are stenotopic, they can be used as indicators of good habitat quality, whereas some of the more eurytopic species can indicate disturbed habitats. |
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| Keywords: | Conservation Streams Riparian vegetation Integrity index Odonata |
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