Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Links between riparian landcover, instream environment and fish assemblages in headwater streams of south-eastern Brazil

Full text
Author(s):
Cruz, Bruna B. [1] ; Miranda, Leandro E. [2] ; Cetra, Mauricio [3]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos UFSCar Sorocaba, Programa Posgrad Diversidade Biol & Conservacao, BR-18052780 Sorocaba, SP - Brazil
[2] US Geol Survey, Mississippi Cooperat Fish & Wildlife Res Unit, Mississippi State, MS 39762 - USA
[3] Univ Fed Sao Carlos UFSCar Sorocaba, Dept Ciencias Ambientais, BR-18052780 Sorocaba, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ECOLOGY OF FRESHWATER FISH; v. 22, n. 4, p. 607-616, OCT 2013.
Web of Science Citations: 21
Abstract

We hypothesised and tested a hierarchical organisation model where riparian landcover would influence bank composition and light availability, which in turn would influence instream environments and control fish assemblages. The study was conducted during the dry season in 11 headwater tributaries of the Sorocaba River in the upper Parana River Basin, south-eastern Brazil. We focused on seven environmental factors each represented by one or multiple environmental variables and seven fish functional traits each represented by two or more classes. Multivariate direct gradient analyses suggested that riparian zone landcover can be considered a higher level causal factor in a network of relations that control instream characteristics and fish assemblages. Our results provide a framework for a hierarchical conceptual model that identifies singular and collective influences of variables from different scales on each other and ultimately on different aspects related to stream fish functional composition. This conceptual model is focused on the relationships between riparian landcover and instream variables as causal factors on the organisation of stream fish assemblages. Our results can also be viewed as a model for headwater stream management in that landcover can be manipulated to influence factors such as bank composition, substrates and water quality, whereas fish assemblage composition can be used as indicators to monitor the success of such efforts. (AU)

FAPESP's process: 09/53056-8 - Physical and biotic integrity in headwaters streams of the Atlantic Forest of Southern São Paulo
Grantee:Mauricio Cetra
Support Opportunities: Regular Research Grants