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The role of current and historical factors on the patterns of fish beta diversity in agroecosystem streams

Grant number: 18/06033-1
Support Opportunities:Scholarships in Brazil - Post-Doctorate
Effective date (Start): September 01, 2019
Effective date (End): August 04, 2021
Field of knowledge:Biological Sciences - Ecology - Theoretical Ecology
Principal Investigator:Tadeu de Siqueira Barros
Grantee:Jaquelini de Oliveira Zeni
Host Institution: Instituto de Biociências (IB). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil


The conversion of local and regionally heterogeneous natural systems to agriculture has been leading to a widespread local and regional habitat and fauna homogenization. However, community response to landscape changes is not always immediate (i.e., historical legacy in communities). Moreover, the way the landscape changes happened over time (dynamic of landscape changes) can also represent an important factor to the current community patterns. Despite that, these historical factors are still neglected in ecological studies. Thus, our aims are to investigate the effects of current (land use in the watershed and instream habitat) and historical (time since initial deforestation and dynamic of landscape changes) factors on (i) instream habitat structure, (ii) species-environment relationships and (iii) taxonomic and functional fish beta diversity in stream from agroecosystems. We selected fish assemblages from Alto Paraná (São Paulo state), Machado (Rondônia state) and Aripuanã-Juruena (Mato Grosso state) basins, which show different patterns time since deforestation (more recent versus old) and forest and agriculture changes over time. Furthermore, these basins have different current deforestation scenarios, from 100% to 0% of forest loss. We are going to calculate taxonomic and functional beta diversity, ordinations (RLQ and fourth-corner) and association between matrices to analyze the relationship between historical and current factors and taxonomic and functional beta diversity. We believe that streams with older, more intense deforestation and landscapes more dynamics will show instream habitat homogenization, with a weak species-environment relationship and lower beta diversity due to the loss of habitat-specialist species with original traits. The results from this project will improve our comprehension of the structuring mechanism of the current patterns of fish assemblages from agroecosystem streams.

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Scientific publications (4)
(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)
JAQUELINI O. ZENI; LUISA MARTINS SENSATO-AZEVEDO; EDUARDO FERNANDO DOS SANTOS; GABRIEL LOURENÇO BREJÃO; LILIAN CASATTI. Habitat use, trophic, and occurrence patterns of Inpaichthys kerri and Hyphessobrycon vilmae (Pisces: Characidae) in Amazonian streams. Neotropical Ichthyology, v. 18, n. 3, . (18/06033-1, 16/01535-3, 18/11954-9)
RAFAELA CARVALHO NEVES; PEDRO PAULINO BORGES; JAQUELINI DE OLIVEIRA ZENI; LILIAN CASATTI; FABRÍCIO BARRETO TERESA. Populações generalistas formadas por indivíduos generalistas: um caso de estudo sobre os hábitos alimentares de um peixe de riacho Neotropical. Acta Limnol. Bras., v. 33, . (18/06033-1)
ROA-FUENTES, CAMILO A.; HEINO, JANI; ZENI, JAQUELINI O.; FERRAZ, SILVIO; CIANCIARUSO, MARCUS V.; CASATTI, LILIAN. Importance of local and landscape variables on multiple facets of stream fish biodiversity in a Neotropical agroecosystem. Hydrobiologia, . (12/05983-0, 18/06033-1)

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