Brazilian Journal of Enviromnent
Open Access Journal
CiteScore
0.4
Indexada na
SCOPUS
QUALIS
B3
2017-2021
quadriênio
Open Access Journal
0.4
Indexada na
SCOPUS
B3
2017-2021
quadriênio
Biomonitoring techniques are frequently used to assess environmental integrity and propose conservation strategies based on the behavior of biotic communities. This study evaluated the effects of anthropogenic environmental changes in the municipality of Itaituba - PA, on dragonfly communities (Insecta: Odonata) in two Permanent Preservation Areas (APPs) on the banks of the Piracanã River, determining their potential as bioindicators of environmental quality. The Habitat Integrity Index (HII) was used to verify the environmental variables present in each location. Data for the collected specimens were analyzed by Analysis of Variance (ANOVA), Linear Regression, Permutational Multivariate Analysis of Variance (PERMANOVA), Nonmetric Multidimensional Scaling (NMDS) and Indicator Value (IndVal). Our results indicated that the degraded area (IIH = 0,10) presented greater richness (F=6.60 p<0.01) and abundance (F=45.02 p<0.0001) of Odonata than the area considered preserved (IIH = 0,48) due to the occurrence of generalist species of Anisoptera, whose ecophysiological needs depend on places with greater incidence of sunlight. The low richness and diversity of Zygoptera in the preserved area were associated with human activities (fishing, deforestation and flow of people) and microclimatic variables. The difference in taxonomic composition was related to the physical conditions of aquatic environments, such as temperature, physical parameters of the water and luminosity, which are important for the distribution of Odonata species. The species considered as habitat indicators were possible due to the composition of the landscape, mainly due to the absence and/or presence of aquatic and riparian vegetation.
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Copyright (c) 2025 Ana Beatriz de Oliveira Araújo, Lucas Tavares Batista, Wully Barreto da Silva