Banca de DEFESA: LUCAS PEREIRA MOURA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUCAS PEREIRA MOURA
DATE: 21/10/2021
TIME: 14:00
LOCAL: Google Meet
TITLE:

Não informado.

KEY WORDS:

Bioindicators. Habitat integrity. Dragonflies. Habitat selection. Land uses.

PAGES: 59
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Odonata are amphibian insects widely used in studies of aquatic ecosystems, especially those related to anthropogenic impacts resulting from changes in land use. So that we can improve their use as bioindicator organisms, there is a need to increase knowledge of the responses of species to the environmental gradient, especially those modified by anthropic action. Given this scenario, our study evaluates the relationship between habitat specificity, morphology, and tolerance differences of Odonata species in streams with different environmental conditions in the Cerrado Maranhense. For this, we collected from 24 streams in the municipality of Caxias, Maranhão, from May to November 2016 and March and April 2017. A total of 824 specimens were collected, distributed in 57 species, of which 12 were classified as generalists and 05 as specialists in integral habitat. Habitat generalists tend to be larger than species that specialize in intact environments. The length and width of the wings and the length of the chest were the most important characteristics for this differentiation. Erythrodiplax fusca and E. basalis had the highest tolerance levels and were classified as generalists, Telebasis griffinii and Epipleoneura williamsoni had the lowest tolerance levels. However, specialist species from intact environments do not always have lower tolerance levels. E. westfalli, E. williamsoni, T. coccinea, Hetaerina dutati and Argia hasemani can be used as bioindicators of intact environments associated with preserved riparian vegetation. More than half of the species (61%; n = 35) were considered rare. A worrying fact given the fragmentation of aquatic environments in the region, which has been shaping the Odonata assemblages, making room for generalist species and excluding species that need more intact conditions to survive. Understanding this balance or distribution of species is essential to establish efficient strategies to reduce anthropogenic impacts, as well as to seek to establish efficient conservation strategies that can meet the requirements of the most specialized species.

BANKING MEMBERS:
Presidente - 1844173 - SHEYLA REGINA MARQUES COUCEIRO
Interno - 2143267 - JOSE MAX BARBOSA DE OLIVEIRA JUNIOR
Externo à Instituição - LEANDRO SCHLEMMER BRASIL - UFPA
Externa à Instituição - KARINA SCHMIDT FURIERI - UFES
Externo à Instituição - FABIO DE OLIVEIRA ROQUE
Externo à Instituição - THIAGO PEREIRA MENDES