Results 31 to 40 of about 527 (97)
ESTIMATION OF PHOSPHORUS EMISSIONS IN THE UPPER IGUAZU BASIN (BRAZIL) USING GIS AND THE MORE MODEL [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 Pollution emissions into the drainage basin have direct impact on surface water quality. These emissions result from human activities that turn into pollution loads when they reach the water bodies, as point or diffuse sources. Their pollution potential
E. A. Acosta Porras +3 more
doaj +1 more source
Ecography, EarlyView.Harmful Microcystis proliferation severely threatens aquatic ecosystems globally, but its impacts on food‐web stability remain poorly understood. Here, we analyzed 1309 metagenomic samples from freshwater ecosystems across China to investigate how Microcystis abundance affects synchrony among taxa in multi‐trophic food webs (from bacteriophages to ...
Lemian Liu +6 more
wiley +1 more source
Ichthyofauna of streams of the Lower Paranapanema River basin, state of Paraná, Brazil [PDF]
Check List, 2015 Several studies of small watersheds of in the Upper Paraná River basin are currently available. Howev-er, the number and extent of its tributary streams still pose a challenge to enhancing current knowledge of their ichthyofauna.
Ana Vidotto-Magnoni +6 more
doaj +3 more sources
Eye Darkening Under Dehydration Stress in the Neotropical Frog Boana punctata (Schneider, 1799)
Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.Dehydration induces a strong and partially reversible increase in iris pigmentation in the Neotropical frog Boana punctata. The tight relationship between iris darkening and hydration state identifies ocular pigmentation as a simple, non‐invasive physiological biomarker with broad potential for assessing hydric stress in amphibian populations ...
Ricardo Reques +5 more
wiley +1 more source
Prospecting molecular markers to distinguish Cichla kelberi, C. monoculus and C. piquiti
Acta Scientiarum: Biological Sciences, 2015 Peacock bass, a fish of the genus Cichla, is an exotic species from the upper river Paraná floodplain in which the species Cichla kelberi and C. piquiti have been confirmed, coupled to the specie C.
Luciano Seraphim Gasques +4 more
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First record of Arapaima gigas (Schinz, 1822) (Teleostei: Osteoglossomorpha), the “pirarucu”, in the upper Paraná River basin, Southeast Brazil [PDF]
Check List, 2015 Arapaima gigas (Schinz), the “pirarucu”, is one of largest freshwater fish of the Neotropical region, naturally occurring in the Amazon, Essequibo, and Orinoco river basins.
Fernando Carvalho +3 more
doaj +3 more sources
International Journal of Climatology, EarlyView.Extreme precipitation trends detected in Paraná, Southern Brazil (1983–2024), are strongly conditioned by the dataset used, with reanalyses indicating coherent inland drying and longer dry spells, observations retaining stronger mesoscale heterogeneity, and satellite products often showing declines in short‐duration extremes. Monthly diagnostics reveal
Paulo Miguel de Bodas Terassi +2 more
wiley +1 more source
Revista Brasileira de Geomorfologia, 2017 This paper presents the spatial distribution of liquid and solid (suspended load) discharge in the Ivaí River Basin, and its implication in the functioning of this river system.
Isabel Terezinha Leli +3 more
doaj +1 more source
Physical and Chemical Characterization of Soil in Urban Solid Waste Disposal Area
Land Degradation &Development, EarlyView.ABSTRACT Waste generation and subsequent disposal in adequate sites still have limitations in some Brazilian municipalities. Therefore, environmental monitoring of these areas is extremely important, as it helps to preserve the environment. The purpose of this study is to analyze the chemical and physical parameters of soil in a landfill area. For this,
Mayara Aline Bones +9 more
wiley +1 more source
Systematic conservation planning for the Paranã River Basin, Brazil, under climate change
, 2016 Planning for effective conservation begins with precise information about species occurrences, accurate species identifications, knowledge of the distributions of species and communities and threats to biodiversity posed by anthropogenic activities and resultant climate change.
openaire +1 more source