Zygoptera / Anisoptera (Insecta: Odonata) ratio as a tool to assess anthropogenic changes in Brazilian Cerrado streams.

Autor: Machado de Albuquerque AK; Programa de Pós-Graduação Em Biodiversidade, Ambiente E Saúde, Laboratório de Entomologia Aquática, Centro de Ensino Superior de Caxias, Universidade Estadual Do Maranhão, 65604.380, Caxias, MA, Brasil. amandakatly@gmail.com., Silas Veras D; Laboratório de Ecologia de Comunidades, Instituto Federal Do Maranhão, Campus Caxias, Rodovia MA-340, Km 02, Gleba Buriti Do Paraíso, Povoado Lamego, Zona Rural, CEP 65600-000, Caxias, MA, Brasil.; Programa de Pós-Graduação Em Ecologia, Instituto de Ciências Biológicas, Universidade Federal Do Pará, Rua Augusto Correia, N° 1, Bairro Guamá, CEP 66075-110, Belém, PA, Brasil., Juen L; Instituto de Ciências Biológicas, Laboratório de Ecologia E Conservação, Universidade Federal Do Pará, Belém, PA, Brasil.; Programa de Pós-Graduação Em Ecologia, Instituto de Ciências Biológicas, Universidade Federal Do Pará, Rua Augusto Correia, N° 1, Bairro Guamá, CEP 66075-110, Belém, PA, Brasil., Silva de Azevêdo CA; Programa de Pós-Graduação Em Biodiversidade, Ambiente E Saúde, Laboratório de Entomologia Aquática, Centro de Ensino Superior de Caxias, Universidade Estadual Do Maranhão, 65604.380, Caxias, MA, Brasil.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2024 Jul 16; Vol. 196 (8), pp. 737. Date of Electronic Publication: 2024 Jul 16.
DOI: 10.1007/s10661-024-12870-1
Abstrakt: Aquatic ecosystems are among the most affected by anthropogenic impacts, and the rapid detection and measurement of these impacts are of great importance for the maintenance of such environments. The order of aquatic insects Odonata has emerged as an important bioindicator of environmental quality due to its sensitivity to environmental changes and its ecophysiological requirements, which make them closely associated with habitat conditions. The aim of this study was to test whether the Zygoptera/Anisoptera ratio can be used as an effective tool to assess anthropogenic changes in Cerrado streams. Our hypothesis is that the proportion of Zygoptera/Anisoptera is an efficient tool for measuring environmental alterations in Cerrado streams, with a positive relationship between habitat integrity and the proportion of Zygoptera and an inverse relationship with the proportion of Anisoptera. Adults were collected in 44 streams of the Cerrado Biome in the eastern Maranhão state. The Habitat Integrity Index (HII) was used to verify the environmental gradient. Our hypothesis was corroborated, with a positive relationship between the richness and abundance of Zygoptera and HII, while an inverse relationship was observed for Anisoptera. According to our results, streams exhibiting a Zygoptera abundance of 68% or higher and richness of 58% or higher can be classified as preserved, while those showing an Anisoptera abundance and richness surpassing 31% and 41%, respectively, may be deemed altered. The patterns detected in the Cerrado were similar to those found in studies of the Amazon Biome and the Atlantic Forest, confirming the effectiveness of this method even for naturally open environments, such as the Cerrado. We conclude, therefore, that this method can be used as a tool to generate rapid results in monitoring studies, with low cost and easy application, enabling the development of mitigation, control, and conservation measures for extremely threatened environments such as those found in the Cerrado Biome.
(© 2024. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
Externí odkaz: