Now showing items 1-10 of 188
Artificial reefs and their effects on fish assemblages in a Brazilian reservoir and Tailrace
In this paper, we evaluate the effects of artificial reefs on fish assemblages in a hypereutrophic reservoir and in the lotic zone immediately below dam. Fish diversity was highest in the lotic zone relative to the reservoir. ...
NEW ALGAE RECORDS (CHLOROPHYCEAE AND BACILLARIOPHYCEAE CLASSES) FROM SIX PAMPEAN LOTIC SYSTEMS OF ARGENTINA
(Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, 2001)
Geographic Distribution of Arsenic and Trace Metals in Lotic Ecosystems of the Pampa Plain, Argentina
In this paper, the geographic distribution of arsenic and other trace elements in surface waters of 39 lotic ecosystems of central Argentina was evaluated. Manganese and arsenic were the most conspicuous elements, being ...
Influence of artificial reefs on fish assemblage of the Barra Bonita Reservoir (São Paulo, Brazil)
This paper deals with the effects of introduced artificial reefs on the diversity of freshwater fish communities in lentic and lotic zones of a very impacted river in southeastern Brazil. To accomplish this goal, artificial ...
Tropical lotic primary producers: Who has the most efficient photosynthesis in low-order stream ecosystems?
Photosynthetic performance was assessed for the main groups of primary producers of low-order tropical streams, comprising macroalgae (11 taxa of Chlorophyta, Rhodophyta and Xanthophyta plus Cyanobacteria), bryophytes (2), ...
Tadpole species richness within lentic and lotic microhabitats: an interactive influence of environmental and spatial factors
(British Herpetol Soc, 2017-10-01)
Anurans inhabiting lentic and lotic water bodies show distinct responses to environmental and spatial variables due to dispersal by adults and microhabitat selection by tadpoles, which creates a hierarchical structure in ...
Photosynthetic responses to temperature in tropical lotic macroalgae
A comparative analysis of the photosynthetic responses to temperature (10-30°C) was carried out under short-term laboratory conditions by chlorophyll fluorescence and oxygen (O2) evolution. Ten lotic macroalgal species ...
Light-related photosynthetic characteristics of lotic macroalgae
(Kluwer Academic Publ, 2004-09-01)
Photosynthetic characteristics in response to irradiance were analysed in 42 populations of 33 macroalgal species by two distinct techniques (chlorophyll fluorescence and oxygen evolution). Photosynthesis-irradiance (PI) ...
Tadpole community structure in lentic and lotic habitats: Richness and diversity in the Atlantic Rainforest lowland
The analysis of species richness and community composition provides basic information to understand the structure of species assemblages. Here, we compared species richness and composition, compositional similarity and ...