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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 type: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 researcher:Tadeu de Siqueira Barros
Grantee:Jaquelini de Oliveira Zeni
Home Institution: Instituto de Biociências (IB). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil

Abstract

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
(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)
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, SEP 2020. Web of Science Citations: 0.
ZENI, JAQUELINI O.; HOEINGHAUS, DAVID J.; ROA-FUENTES, CAMILO A.; CASATTI, LILIAN. Stochastic species loss and dispersal limitation drive patterns of spatial and temporal beta diversity of fish assemblages in tropical agroecosystem streams. Hydrobiologia, v. 847, n. 18, SI JUL 2020. Web of Science Citations: 0.
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, p. -, 2020. Web of Science Citations: 0.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.