Results 21 to 30 of about 19,982,393 (193)
Acta Botânica Brasílica, 2005 Realizou-se o inventário florístico das diatomáceas pertencentes às classes Coscinodiscophyceae e Fragilariophyceae de rios da bacia hidrográfica Litorânea do Paraná.
Monaliza Landucci +1 more
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Effects of multiple stressors on hyporheic invertebrates in a lotic system
Ecological Indicators, 2003 Abstract The impacts of co-occurring stressors (river regulation by a dam and mine drainage) on hyporheic macroinvertebrate assemblages and environmental variables were investigated in a mountainous area of central Colorado at seven sampling sites in Lake Fork during two different seasons.
S.M. Nelson, R.A. Roline
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Predicting fish densities in lotic systems: a simple modeling approach [PDF]
Journal of the North American Benthological Society, 2010 AbstractFish density models are essential tools for fish ecologists and fisheries managers. However, applying these models can be difficult because of high levels of model complexity and the large number of parameters that must be estimated. We designed a simple fish density model and tested whether it could predict fish densities in lotic systems with
Daniel J. McGarvey +2 more
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Diversity and distribution of odonates in Rani Reserve Forest, Assam, India
Journal of Threatened Taxa, 2021 Odonata are the bioindicators of freshwater ecosystem health and is recognised as an excellent ‘flagship’ group among insects. Baseline knowledge on the diversity and distribution of odonates over spatiotemporal scale is the key to biodiversity ...
Dipti Thakuria, Jatin Kalita
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Modeling Lotic Organism Populations with Partial Differential Equations [PDF]
, 2016 We present in this paper a mathematical model for a population of caddisfly larvae in the Upper Mississippi River, which can either live in the current of the water or fix themselves to large wood debris submerged throughout the river. The model consists
Viss, Chase, Eager, Eric, Clark, Tom
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Principle and design of hatch operation system for fish migrating upstream-downstream of the discharge sill [PDF]
Acta Scientiarum Polonorum. Formatio Circumiectus, 2016 To improve fish migration and restore local lotic ecosystems, it is necessary to consider the various current hydro-construction methods. There have been partial successes in systems that improve fish passage over various obstacles but new approaches ...
Răzvan G.Voicu, Kelly N. Miles
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Atmosphere, 2021 In spite of the obvious climate changes effects on the Carpathian Basin hydrographic nets fish fauna, studies on their potential refuge habitats in drought periods are scarce.
Doru Bănăduc +4 more
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Monitoring bioavailable phosphorus in lotic systems: A polyphasic approach based on cyanobacteria
Science of The Total Environment, 2014 Conventional assays to measure phosphorus in freshwater systems are sometimes not sufficient to quantify the actual bioavailable P for aquatic biota since some inorganic or organic P species may not be detected by chemical methods, and their bioavailability can be affected by a range of environmental factors.
Martínez-Rosell, Aitor +4 more
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Differences in the feeding of Rhamdia quelen (Siluriformes, Heptapteridae) in four distinct lotic systems [PDF]
Brazilian Journal of Biology, 2015 AbstractThe aim of this study was to compare the food composition of Rhamdia quelen in four distinct order rivers. It was performed at a low part at the basin of the Sorocaba river in systems classified as first (Anastácio stream), second (Nego stream), fifth (Tatuí river) and sixth (Sorocaba river) orders.
Villares Junior, GA, Goitein, R
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Acta Botânica Brasílica, 2011 Poucos estudos tem abordado a flora de diatomáceas de sistemas oligotróficos do Brasil. São apresentados os resultados da composição taxonômica e distribuição espacial e temporal de diatomáceas no rio do Salto, situado no Parque Estadual do Ibitipoca ...
Luís Gustavo de Castro Canani +2 more
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