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Fluvial dynamics and limnological characterization of cedro stream, president Prudente-SPDinâmica fluvial e caracterização limnológica do córrego do cedro, presidente Prudente-São Paulo/ Brasil
(2020-01-01)
A B S T R A C T The need for studies on environmental issues, such as water resources, is increasingly essential as a way of mitigating the adverse impacts caused by human actions. In this sense this article aims to analyze ...
Dispersal of fish eggs and larvae in a cascade of small hydropower plants with fish ladders
(Springer, 2020-10-10)
This study was conducted to investigate fish eggs and larvae dispersal in a river stretch influenced by small hydropower plants in Southeast Brazil. The main hypothesis is that the downstream dispersal of free-flowing eggs ...
The variation of microcrustaceans diversity downstream of small reservoirs is influenced by litoranean taxa
(Fundacao Zoobotanica Rio Grande Sul, Museu Ciencias Naturais, 2021-01-01)
The hypotheses tested were that, as well as in reservoirs of large surface areas, volumes and flow, in small reservoirs there is also a gradual and continuous dilution of the richness, diversity and abundance of microcrustaceans ...
The influence of habitat structure, at different spatial scales, on the ecological distribution of macroalgal communities in streams
(Soc Botanica Sao Paulo, 2016-06-01)
Habitat heterogeneity influences the composition and structure of macroalgal communities in lotic environments. However, depending on the spatial scale, different environmental characteristics may exert more or less ...
Sexual Dimorphism in Bokermannohyla martinsi (Bokermann, 1964) (Anura, Hylidae) with a Report of Male-Male Combat
(Soc Brasileira Herpetologia, 2018-08-01)
Male-biased sexual size dimorphism (SSD), or a lack of SSD, in amphibians may be related to the territoriality. Male-biased SSD is quite abundant among the species of the Neotropical hylid genus Bokermannohyla. However, ...
Spatial heterogeneity affecting fish fauna in cascade reservoirs of the Upper Parana Basin, Brazil
(Springer, 2014-10-01)
In cascade reservoirs, different zonation effects can be observed along the longitudinal axis, depending on the retention time of each reservoir. In this study, we evaluated the relationships among fish and spatial and ...
Índices de qualidade da água e de estado trófico do rio Caiabi, MT
(2016-01-01)
The objective of this study was to evaluate the water quality of the Caiabi River based upon the water quality index (WQI) and the trophic state index (TSI), considering seasonal and spatial variations, with the aim of ...
Trophic State Evolution over 15 Years in a Tropical Reservoir with Low Nitrogen Concentrations and Cyanobacteria Predominance
(2016-03-01)
Anthropic eutrophication is one of the most widespread problems affecting water quality worldwide. This condition is caused by excessive nutrient inputs to aquatic systems, and one of the main consequences is accelerated ...
Local spatial distribution of stream macroalgae – does gastropod activity matters?
(2021-12-01)
The effects of gastropod Biomphalaria sp. on the benthic algae community (micro and macroalgae) were experimentally studied in an unshaded artificial stream. Using artificial substrates, two treatments were tested: with ...
Evaluation of seasonal dynamics and bioindication potential of macroalgal communities in a polluted tropical stream
(2002-01-01)
Macroalgal communities and environmental variables were analyzed seasonally along a polluted tropical stream in São Paulo State, Brazil. We aimed to improve the knowledge of tropical macroalgal communities, to study the ...