Biodiversidade Tropical (extinto)

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http://repositorio.ufes.br/handle/10/17602
Programa de Pós-Graduação em Biodiversidade Tropical

Centro: CEUNES
Telefone: (27) 3312 1701
URL do programa: https://posgraduacao.saomateus.ufes.br/ppgbtextinto

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Navegando Biodiversidade Tropical (extinto) por Assunto "Aquatic insects"

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    Diversidade e variação espacial de Ephemeroptera, Plecoptera e Trichoptera (Insecta) para a bacia do Rio São Mateus
    (Universidade Federal do Espírito Santo, 2013-02-20) Angeli, Kamila Batista; Salles, Frederico Falcão; Soares, Luisa Maria Sarmento; Silva, Luiz Fernando Duboc da
    Ephemeroptera, Plecoptera and Trichoptera form a group known as EPT, and have recognized importance in biomonitoring studies, as well as playing a significant role in nutrient cycling. The three orders have representatives in the State of Espirito Santo. River São Mateus is the main water supply for several cities in the northern portion of the state and its remaining forests that protect soil and water resources have been cut or burned along its course. There is no study about the aquatic insects, including EPT from the Basin of River São Mateus. The aim of this study was to analyze the spatial variation of the diversity of Ephemeroptera, Plecoptera and Trichoptera in the Basin of River São Mateus based on adults, as well as to produce a list of the species found in the river for the first time. The work was divided in two chapters: the first constitutes the first inventory to the River São Mateus. The second chapter deals with the spatial variation of richness, diversity and composition of Ephemeroptera and Trichoptera in an extension of the Basin of River São Mateus. Specimens were collected using Pennsylvania light trap. The results of the first chapter indicate a high diversity of both orders for the Basin of River São Mateus, some taxa recorded are for the first time from the State of Espirito Santo and others from the Southeast Region. Besides, several new species and even genera have been found in the river. The study highlights the need to expand studies on large rivers, since the faunal composition of the Basin of River São Mateus differs considerably from smaller rivers and streams in the same region. The results of the second chapter show that the richness of Ephemeroptera and Trichoptera is strongly influenced by the distance from the river mouth, unlike the results found for diversity, evenness and taxonomic distinctiveness. The composition of Ephemeroptera is well-structured as the distance of the points of the river mouth, unlike Trichoptera whose closest points of the mouth have similar composition, and the farthest points does not show any grouping pattern as species composition.
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    O uso do DNA barcode para a taxonomia de insetos aquáticos
    (Universidade Federal do Espírito Santo, 2016-12-14) Constantino, Rayner Paresqui; Salles, Frederico Falcão; Paresque, Roberta; Araújo, Anderson Geyson Alves de; Fagundes, Valéria
    Aquatic insects are excellent environmental bioindicators , by the fact that they respond in some way to the factors that alter the environment. However, its use as a biomarker has been highly hindered due to lack of immature identified to species level, due to the immature stages do not have remarkable morphological characteristics, as they present in the mature phase. In order to reverse this, this study aimed to use molecular tools, together with the alpha taxonomy, to accelerate the identification and association of immature stages with adult stages, in which a mitochondrial gene fragment analysis, COI, also known as barcode, acts supporting the species delimitation. A total of 221 sequences, of the orders Odonata, Plecoptera and Trichoptera, were analyzed, with a mean intraspecific genetic divergence was approximately 1%, in which it was possible to rescue twenty associations between immature stages and their respective adult representatives, in which nine of these, do not have the stage described in the literature: four associations for Odonata, one for Plecoptera and four in Trichoptera. Validating in this way, the use of the barcode, together with the alpha taxonomy, for analyzes focused on the delimitation of species of groups of aquatic insects.