Aquatic Ecosystem
Mostrando 13-24 de 83 artigos, teses e dissertações.
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13. Forecasting the impact of an invasive macrophyte species in the littoral zone through aquatic insect species composition
ABSTRACT Invasive macrophytes threaten freshwater ecosystem biodiversity. We analyzed the impact of the invasive white ginger lily (Hedychium coronarium J. König, Zingiberaceae) on aquatic insect assemblages living in the littoral zone of a tropical reservoir. We took aquatic insect samples in the littoral zone on four main vegetal profile banks: white ging
Iheringia, Sér. Zool.. Publicado em: 27/11/2017
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14. Spider species composition in the tree-shrub strata of riparian forests and its microhabitats in southern Brazil
ABSTRACT The composition of the spider fauna of riparian forests is insufficiently known. These forests, adjacent to both aquatic and terrestrial environments, are recognised as having important ecosystem functions. We compare the composition of spider assemblages of four riparian forests in different drainage basins, along with their microhabitats (edges an
Zoologia (Curitiba). Publicado em: 14/07/2016
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15. Diet shift of Red Belly Pacu Piaractus brachypomus (Cuvier, 1818) (Characiformes: Serrasalmidae), a Neotropical fish, in the Sepik-Ramu River Basin, Papua New Guinea
Introduction of fish species is a globally widespread practice that causes losses of native species and homogenization of diversity within and across continents. Diet assessments are important tools to depict the ecological function of species introduced into novel ecosystem and possible direct and indirect ecological effects. In this study, we compare the d
Neotrop. ichthyol.. Publicado em: 09/01/2015
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16. Phytoplankton of two rivers in the eastern Amazon: characterization of biodiversity and new occurrences
During the various hydrological periods in 2011, we studied the phytoplankton along an 87-km stretch of the Araguari and Falsino rivers, which are located in the eastern Brazilian Amazon, in the state of Amapá, Brazil, the most ecologically preserved state in the country. In the study area, the aquatic ecosystem is under pressure from human activities such
Acta Bot. Bras.. Publicado em: 2013-06
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17. Um rio de unidade de conservaÃÃo, como ambiente âpristineâ para ictiofauna neotropical / A river of storage unit, as environment "pristine" for neotropical ichthyofauna
Os ambientes lÃticos sofrem influÃncia das regiÃes externas, mas tambÃm influenciam no ambiente terrestre. Os estudos em Ãreas preservadas ainda sÃo escassos principalmente quando se considera os ecossistemas aquÃticos, que somente sÃo preservados quando fazem parte de uma Unidade de ConservaÃÃo. Outro fator que dificulta a preservaÃÃo de ambient
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2012
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18. Algae of economic importance that accumulate cadmium and lead: a review
Currently, algae and algae products are extensively applied in the pharmaceutical, cosmetic and food industries. Algae are the main organisms that take up and store heavy metals. Therefore, the use of compounds derived from algae by the pharmaceutical industry should be closely monitored for possible contamination. The pollution generated by heavy metals rel
Revista Brasileira de Farmacognosia. Publicado em: 05/06/2012
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19. A new species of Lemmermanniella (Cyanobacteria) from the Atlantic Rainforest, Brazil
The Brazilian Atlantic Rainforest is a highly heterogeneous ecosystem comprising large numbers of tropical and subtropical habitats favorable to the development of cyanobacteria. Studies on cyanobacteria in this ecosystem are still rare, however, especially those involving unicellular and colonial types. The high biodiversity and endemism of this biome has b
Braz. J. Bot.. Publicado em: 2012
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20. Crescimento, hematologia e metabolismo de pacu (Piaractus mesopotamicus) submetido ao exercício aeróbico e alimentado com níveis crescentes de proteínas
The composition of the diet, the metabolic adaptations and variations in the activity of the fish are the main factors responsible for seasonal changes in physiological variables. It is known that aerobic exercise can improve the fish growth due to: the enhancement of feed conversion, reduced dominance, increased protein synthesis and lipid and glucose catab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2011
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21. Simulação biofisicoquímica em reservatório tropical polimítico / Biophysicochemicall simulation in a tropical polimithic reservoir
O reservatório do Lobo, localizado no estado de São Paulo, é um sistema dinâmico no qual se desenvolve um ciclo diurno de estratificação e mistura, de modo similar ao que tem sido observado em outros lagos tropicais. Utilizou-se simulação 3D computacional com os softwares ELCOM (Estuary and Lake Computer Model) acoplado ao CAEDYM (Computacional Aquat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2011
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22. Desempenho de tanques vegetados em um ecossistema engenheirado para tratamento descentralizado de esgotos domiciliares na Ilha Grande, RJ / Performance of vegetated tanks in an engineered ecosystem for decentralized treatment of sewage in Grande Island, RJ
The lack of appropriate infrastructure for sewage collection and treatment affects several communities living under unhealthy conditions in coastal areas and in insular systems in Rio de Janeiro State. The objective of this study was to assess the performance of an engineering ecosystem for the descentralized treatment of domestic wastewater located at the C
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2011
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23. Diversidade de macrófitas aquáticas em áreas úmidas do Parque Nacional da Lagoa do Peixe, Rio Grande do Sul
The Lagoa do Peixe National Park is an important conservation unity, aiming to protect the wetlands, one of the most endangered type of ecosystem in the world. In Southern Brazil around 90% of the wetlands were already lost. The protected ecosystems in the park are ernationally important for biodiversity conservation and it is the unique Ramsar site in South
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/03/2011
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24. Simulação da dinâmica de carbono em bacias hidrográficas
In most aquatic ecosystems respiration exceeds autochtonous gross primary production leading to a negative net ecosystem production. Recent studies attributes this condition to allochtonous organic matter degradation processes, so the inland water carbon cycle should be linked to the input of organic carbon from the catchment. This work contributes to a bett
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011