Lotic Systems
Mostrando 13-20 de 20 artigos, teses e dissertações.
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13. Estudos evolutivos no gênero Astyanax (Pisces, Characidae) / Evolutionary studies in the Astyanax genus (Pisces, Characidae).
Astyanax is one of the species-richest genera within the order Characiformes. More than 100 representatives are widespread throughout nearly all the Neotropical region, inhabiting an array of environments, such as mountain areas, lotic and lentic river portions, lake systems and headwaters. This fish group has been a target of chromosomal studies for over 30
Publicado em: 2008
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14. Macroinvertebrados em córregos da região da Mata Atlântica (Sudeste do Brasil) : influência da cultivo de banana
A integridade dos ecossistemas aquáticos tem sido comprometida por inúmeras ações antrópicas, como por exemplo, pela agricultura extensiva que tem mostrado alterações na qualidade de água e nas características da comunidade aquática. Muito se conhece a respeito de plantações anuais, como da cana-de-açúcar, sojas, milho, etc., mas pouca informa�
Publicado em: 2007
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15. Influence of the phreatic aquifer in the nutrient dynamics (nitrogen and phosphorus) in lakes of different hydrodynamic characteristics / Influência do aqüífero freático na dinâmica de nutrientes (nitrogênio e fósforo) em lagoas com diferentes características hidrodinâmicas
The discharge zone of Paranapanema river at Jurumirim reservoir is an area of decreased current velocity associated to a great number of aquatic environments with different hydrodynamic characteristics. To evaluate the influence of the superficial phreatic aquifer in the nutrient dynamics (nitrogen and phosphorus and main cations), three floodplain lakes wit
Publicado em: 2007
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16. BIOLOGIA POPULACIONAL DO CARANGUEJO DE ÃGUA DOCE Trichodactylus petropolitanus NO CÃRREGO DA MINA, CAÃAPAVA, SP: MONITORAMENTO AMBIENTAL A PARTIR DE ESTUDO DE POPULAÃÃES ANIMAIS / Population biology of the freshwater crab Trichodactylus petropolitanus in the CÃrrego da Mina, CaÃapava, SP: environmental monitoring from animal population studies
The freshwater crab Trichodactylus petropolitanus (GÃldi, 1886), is an endemic Brazilian species with occurrence in the States of Minas Gerais, Rio de Janeiro, SÃo Paulo, Paranà and Santa Catarina, being its distribution widely coincident with the domain of the almost extinct Mata AtlÃntica forest. Besides its importance in the trofic web of lotic system
Publicado em: 2005
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17. Limnologia do rio Uberaba (MG) e a utilização de macroinvertebrados bentônicos como bioindicadores das modificações ambientais / Limnology of Uberaba river and using of benthic macroinvertebrates as bioindicator of environmental changes
Lotic systems are considered opened and one-way energy flux systems. In these cases, the intense relationship with adjacent terrestrial environment renders rivers ecological conditions a reflex of transformations occurred at its watershed. The present study aimed to profile an Uberaba river ecological features as a function of the watershed main uses. Limnol
Publicado em: 2003
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18. Efeito da alteração ambiental sobre comunidades de Odonata em riachos de Mata Atlântica de Minas Gerais, Brasil
The effect of riparian deforestation and stream impoundments on an odonate community was studied in áreas of surviving Atlantic forest in Viçosa and in Rio Doce State Park (PERD), Marliéria, Minas Gerais, Brazil. During 1997 16 species of Libellulidae, 4 Coenagrionidae, 2 Gomphidae, 2 Calopterygidae, 1 Megapodagrionidae, 1 Aeshnidae and 3 Protoneuridae we
Revista Brasileira de Zoologia. Publicado em: 2002-06
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19. Prevalence and distribution of Aeromonas hydrophila in the United States.
The abundance of Aeromonas hydrophila was measured in 147 natural aquatic habitats in 30 states and Puerto Rico. Viable cell counts were used to estimate density at all sites by using Rimler-Shotts medium, a differential presumptive medium for A. hydrophila. Temperature, pH, conductivity, salinity, and turbidity were measured simultaneously with water sample
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20. Prediction of Substrate Removal Rates of Attached Microorganisms and of Relative Contributions of Attached and Suspended Communities at Field Sites
A mathematical model composed of a direct proportionality relationship between bulk water velocities and field-determined second-order microbial transformation rate coefficients, and the relative rate coefficient of a benchmark chemical, was developed for estimating the substrate removal rates of rapidly degraded chemicals by attached organisms in shallow (<