Banca de DEFESA: BRUNO STEFANY FEITOZA BARROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : BRUNO STEFANY FEITOZA BARROS
DATE: 29/06/2022
TIME: 14:00
LOCAL: auditório - Prédio das Coleções Biológicas (Bloco 4B)
TITLE:

Beta diversity of the ichthyofauna of streams in Conservation Units in the South Western Amazon

KEY WORDS:

Neotropical fish ecology, Madeira River basin, streams, protected areas, biological collections

PAGES: 95
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Beta diversity is a component of description of species diversity between locations and, when partitioned, may reflect two phenomena: nesting (nestedness/species richness) and species replacement (turnover/species replacement). Among the objectives of this study, the following stand out: identification of variations in factors involved in the composition of fish among streams; determination of physical associations of habitat and abiotic and spatial factors with the ichthyofauna found in streams of hydrographic basins in protected areas in the South Western Amazon. The collections were carried out in 2019 and 2021 in six streams of each of the three federal conservation units located in the South Western portion of the Amazon: Campos Amazônicos National Park (PARNA), PARNA Mapinguari and Jaru Biological Reserve (REBIO). Data from ichthyofauna studies of five streams in the Cuniã Ecological Station were also used, totaling 23 upland streams from four UC, all sampled in the low-water period of the region. A total of 10.473 were captured. Distributed in 157 species, 96 genera, 28 families and eight orders. The calculated β-total diversity was 0.33 for the presence-absence (p/a) data and 0.40 in the calculation performed with abundance data. Its partition/decomposition showed the dominance of species replacement for p/a and abundance data at 71.09% and 85.76%, respectively. Indicating that the species substitution mechanism is the main influencing structure in the heterogeneity of the studied fish fauna. LCBD showed an inversely proportional relationship with the richness and abundance indices between the points and needs to be better understood. The predictive models indicated that the environmental variable "altitude" had the greatest contribution among the observed variation in the ichthyofauna, but the categorical "basin" (considered here as spatial) predominated in explaining the variation in β and βREP diversity for both abundance and data Pan. The combination of the two types of predictors (environmental and spatial) presented explanation values greater than each of these isolated factors. The nesting component did not show a strong correlation with the predictive variables and needs to be better understood as a whole.

BANKING MEMBERS:
Interna - 2282442 - CAROLINA RODRIGUES DA COSTA DORIA
Interno - 1905088 - RONALDO DE ALMEIDA
Interno - 359961 - WANDERLEY RODRIGUES BASTOS
Externo à Instituição - JANSEN ZUANOM - INPA
Externa à Instituição - ARIANA CELLA RIBEIRO - IFRO