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Relationships among the deforestation process and the fish diversity patterns at Western Amazon streams

Grant number: 12/21916-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2014
Effective date (End): March 31, 2018
Field of knowledge:Agronomical Sciences - Forestry Resources and Forestry Engineering - Nature Conservation
Principal Investigator:Lilian Casatti
Grantee:Gabriel Lourenço Brejão
Home Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil
Associated scholarship(s):15/05827-6 - Relationships between the deforestation process and the fish diversity patterns at Western Amazon streams, BE.EP.DR


The streams of the Neotropical region harbor a small-sized fish fauna, frequently with limited geographical distribution and, generally, highly dependent on riparian vegetation for feeding, shelter and reproduction. The watershed native vegetation removal is one of the modifications which the effects on aquatic environments are not completely understood yet. The use of the deforestation history along with the current landscape structure enhances the power of analysis to evaluate the ecological deforestation effects. Moreover, distinct ways of the deforestation process might affect the fish community composition and functioning. For understanding how the historical process of deforestation interfered with the current features of fish diversity, two hypotheses surface: (1.) the functional erosion of the studied communities from the deforestation process occurs, and (2.) The way how the deforestation process was conducted and the age of the forest removal drives the composition and the diversity patterns by three distinct paths (i) the partial forest remain allows the diversity remains but occurs a little loss of species, (ii) the recent deforestation allows the diversity remains but occurs a great loss of species, and (iii) the ancient deforestation causes several damages on the ichthyofauna diversity and composition.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RIBEIRO, JR., JOSE WAGNER; SIQUEIRA, TADEU; BREJAO, GABRIEL LOURENCO; ZIPKIN, ELISE F. Effects of agriculture and topography on tropical amphibian species and communities. Ecological Applications, v. 28, n. 6, p. 1554-1564, SEP 2018. Web of Science Citations: 2.
BREJAO, GABRIEL L.; HOEINGHAUS, DAVID J.; PEREZ-MAYORGA, MARIA ANGELICA; FERRAZ, SILVIO F. B.; CASATTI, LILIAN. Threshold responses of Amazonian stream fishes to timing and extent of deforestation. Conservation Biology, v. 32, n. 4, p. 860-871, AUG 2018. Web of Science Citations: 7.
PEREZ-MAYORGA, MARIA ANGELICA; CASATTI, LILIAN; TERESA, FABRICIO BARRETO; BREJAO, GABRIEL LOURENCO. Shared or distinct responses between intermediate and satellite stream fish species in an altered Amazonian River?. ENVIRONMENTAL BIOLOGY OF FISHES, v. 100, n. 12, p. 1527-1541, DEC 2017. Web of Science Citations: 2.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
BREJÃO, Gabriel Lourenço. Responses of stream fish assemblages to timing and extent of deforestation in Western Amazon. 2018. 140 f. Doctoral Thesis - Universidade Estadual Paulista "Júlio de Mesquita Filho" Instituto de Biociências, Letras e Ciências Exatas..

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