Stream River
Mostrando 13-24 de 149 artigos, teses e dissertações.
-
13. Impacts of land-use change on southeast Amazonia basin streamflow
Resumo A Região Amazônica vem despertando interesse crescente da comunidade científica internacional devido às amplas possibilidades ambientais que suas densas florestas têm a oferecer no que diz respeito à regulação climática e recursos hídricos. Apesar dos muitos esforços de agências reguladoras de meio ambiente e centros de pesquisa, esta regi
Rev. Ambient. Água. Publicado em: 01/04/2019
-
14. Analytical solution for the stationary model of pollutant propagation in an aquatic medium
Resumo Este trabalho apresenta uma nova abordagem analítica para a solução de problemas de dispersão de poluentes ao longo de corpos hídricos com contornos irregulares. Nesta abordagem, a equação advectivo-difusiva é expressa em termos de coordenadas curvilíneas ortogonais que são definidas pelo potencial de velocidade e pela função de corrente c
Rev. Ambient. Água. Publicado em: 25/03/2019
-
15. Gestión de cuencas metropolitanas. Un abordaje desde el proyecto de paisaje. Caso: Arroyo del Gato, Región Metropolitana de Buenos Aires
Resumo Historicamente, a gestão de bacias hidrográficas na Região Metropolitana de Buenos Aires (RMBA) carece de uma abordagem ambiental integral, em que rios e córregos sejam valorizados a partir de seu potencial ecológico e paisagístico. Nesse sentido, a ideia de paisagem, difundida desde o continente europeu para o início do século XXI, poderia c
urbe, Rev. Bras. Gest. Urbana. Publicado em: 21/02/2019
-
16. Effects of deforestation on headwater stream fish assemblages in the Upper Xingu River Basin, Southeastern Amazonia
RESUMO A expansão da fronteira agrícola amazônica representa a mais ampla mudança na cobertura e uso da terra no mundo contemporâneo, e ameaça a integridade de ecossistemas de riachos que abrigam a maior diversidade de peixes de água doce do planeta. Nosso objetivo foi testar as hipóteses de que o desmatamento afeta a abundância, a riqueza e a estru
Neotrop. ichthyol.. Publicado em: 31/01/2019
-
17. New endemic species of freshwater crayfish Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae) from the Atlantic forest in southern Brazil
Abstract Two new species of Parastacus Huxley, 1879 are described from the Atlantic Forest in southern Brazil: Parastacus buckupi sp. nov. from a highland stream in the hydrographic basin Maquiné river, Maquiné, state of Rio Grande do Sul; and Parastacus pilicarpus sp. nov. from a first order stream in the hydrographic basin Araranguá River, Morro Grande,
Nauplius. Publicado em: 25/06/2018
-
18. Occurrence of phoresy between Ancistrus multispinis (Actinopterygii: Siluriformes) and Ichthyocladius sp. (Diptera: Chironomidae) in Atlantic forest streams, Southeastern Brazil
ABSTRACT Phoretic relationships often bring large advantages to epibionts. By attaching themselves to mobile hosts, epibionts are able to: expand their ranges without spending energy, reduce their risk of being predated, and increase their probability of finding food. We assessed the phoretic relationship between the siluriform fish Ancistrus multispinis (Re
Zoologia (Curitiba). Publicado em: 28/05/2018
-
19. Hardening and Stability of Plinthic Materials of the Araguaia River Floodplain under Different Drying Treatments
ABSTRACT Plinthite and petroplinthite occur frequently in Brazilian soils, but there is little information on the behavior of these materials. The aim of the present study was to assess the effect of different drying periods on the hardening and stability of plinthic materials of soils in the floodplain of the Araguaia River and the João Leite stream in Goi
Rev. Bras. Ciênc. Solo. Publicado em: 03/05/2018
-
20. Metrics derived from fish assemblages as indicators of environmental degradation in Cerrado streams
ABSTRACT The development of effective monitoring tools depends on finding sensitive metrics that are capable of detecting the most important environmental impacts at a given region. We assessed if metrics derived from stream fish assemblages reflect physical habitat degradation and changes in land cover. We sampled the ichthyofauna and environmental characte
Zoologia (Curitiba). Publicado em: 26/04/2018
-
21. Rapid Assessment of Habitat Diversity Along the Araras Stream, Brazil
ABSTRACT Agriculture, urbanization, and industrialization are some of the anthropogenic activities that constantly generate negative impacts on natural environments. Part of this degradation directly affects aquatic systems. This study aimed to evaluate the visual characteristics of the Araras Stream, located in the municipality of Araras, São Paulo state,
Floresta Ambient.. Publicado em: 30/11/2017
-
22. Abbreviated larval development of Macrobrachium inpa Kensley and Walker, 1982 (Crustacea: Decapoda: Palaemonidae) from an Amazon Basin forest stream, Brazil, reared in the laboratory
Abstract This paper brings the description and illustrations of the abbreviated larval development of the Amazonian freshwater palaemonid shrimp, Macrobrachium inpa Kensley and Walker, 1982. The study was based on ovigerous females (mean total body length of 27.0 ± 1.64 mm) collected in a small forest stream in the Reserva Florestal Ducke, near Manaus, Braz
Nauplius. Publicado em: 11/08/2016
-
23. Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco System (Northern Patagonia, Argentina)
ABSTRACT Seven sites were examined in the Challhuaco-Ñireco system, located in the reserve of the Nahuel Huapi National Park, however part of the catchment is urbanized, being San Carlos de Bariloche (150,000 inhabitants) placed in the lower part of the basin. Physico-chemical variables were measured and benthic macroinvertebrates were collected during thre
Iheringia, Sér. Zool.. Publicado em: 2015-09
-
24. Diferenças na alimentação de Rhamdia quelen em quatro diferentes ordens de sistemas lóticos
ResumoEste estudo teve como objetivo comparar a alimentação de Rhamdia quelenem quatro diferentes ordens de sistemas lóticos. O estudo foi realizado em um trecho da parte baixa da bacia do rio Sorocaba, em sistemas de primeira (Anastácio stream), segunda (Nego stream), quinta (Tatuí river) e sexta (Sorocaba river) ordens. As coletas foram realizadas men
Braz. J. Biol.. Publicado em: 25/08/2015