808 resultados para Fauna de solo. Determinantes ambientais locais. Bioma Caatinga.Método TSBF
Resumo:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Resumo:
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo:
Os igarapés amazônicos podem apresentar características ambientais rigorosas para diversas espécies de peixes devido à sua condição oligotrófica. Apesar disso, estes cursos d’água detêm uma ictiofauna rica e diversificada, que ocupa uma grande variedade de microhábitats nos igarapés. Em sistemas de lagos de ria, os rios e igarapés sofrem um represamento natural e passam a ter baixos valores de correnteza, o que pode tornar esses ambientes mais homogêneos, já que a correnteza afeta diversas características dos igarapés. Nesse caso, a distância entre os igarapés poderia ser um dos principais fatores estruturadores das assembleias de peixes. Este trabalho teve como objetivo analisar a influência do espaço e do ambiente sobre a estrutura das assembleias de peixes de igarapés afogados em Caxiuanã, na Amazônia Oriental. As coletas de peixes foram realizadas durante o período da seca de 2010, abrangendo 34 trechos de igarapés. Foram mensurados oito fatores abióticos para testar os efeitos das características ambientais locais. Para analisar os efeitos do espaço, foram calculados filtros espaciais a partir das coordenadas geográficas, bem como a distância fluvial entre os trechos. As análises mostraram que o ambiente foi o único fator a influenciar a diversidade beta, refutando a hipótese do espaço enquanto fator estruturador e reforçando o papel do nicho ecológico na distribuição das espécies. Apesar disso, os fatores abióticos explicaram uma porcentagem baixa da variação na composição das espécies de peixe, o que mostra que outras variáveis podem afetar essas assembleias.
Resumo:
Pós-graduação em Agronomia - FEIS
Resumo:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Resumo:
O presente estudo teve por objetivo verificar a ocorrência das principais espécies de moscas da família Calliphoridae em diferentes ambientes (urbano, rural e silvestre) do município de Botucatu, SP. Para tanto, foram usadas armadilhas apropriadas e iscas, substituídas diariamente, distribuídas em cada local de coleta mensalmente durante aproximadamente o período de um ano. Foram coletados um total de 3188 espécimes. Análises estatísticas e testes de correlação também foram usados para medir a relação das espécies com os fatores ambientais, locais, preferência e atratividade por iscas e as relações e interações ecológicas entre as diferentes espécies
Resumo:
In São Paulo state, deforestation and agriculture activities are increasing soil losses processes, especially in areas of susceptible soils where properties not adopt soil conservation practices. Environmental adequacy at property level regarding Permanent Protection Areas and Legal Reserves is considered a factor on reducing soil losses and considering that we assessed soil losses of different scenario of environmental adequacy. Simulations of erosive process were carried out in 15 catchments of Corumbataí river basin, according to different forest restoration scenarios, as well as the current situation of land use/land cover. The scenarios include the implementation of Permanent Preservation Areas (PPA), the reforestation of variable source areas, and two scenarios, the Legal Reserve installation in 20% of each catchment, being one of them for most critical areas in terms of erosion and the other at random. It was observed that the establishment of PPA and the reforestation of hydrologically sensitive areas, offered only a small contribution to the control of the erosive process, resulting in a reduction of 10% and 7,8%, respectively, while the legal reserve in critical areas has a significant reduction of 69,8%. The random scenario, in turn, resulted in a reduction of only 21,4%. Results show that reforestation could reduce soil losses, but previous studies of land prioritization and planning could increase significantly its efficiency at this process.
Relação entre macrofauna, agregação e atributos edáficos em sequência de culturas sob plantio direto
Resumo:
Pós-graduação em Agronomia (Agricultura) - FCA
Resumo:
As concern about the environment and demand for special coffees, this review aimed to gather information about the effects of shading on the coffee crop, whereas its origin in the African's understory. Among the effects discussed are the increase in organic matter and improving of the soil fauna, nutrient cycling, decrease of soil erosion, environmental contamination, greenhouse gases, biodiversity conservation, light availability, temperature and wind mitigation, incidence of pests, plant diseases and weeds, production of the shade species and, finally, how all of these factors together have an effect on the phenology, yield and quality of coffee.
Resumo:
OBJETIVO: Avaliar a responsividade da escala de avaliação funcional para pacientes com distrofia muscular de Duchenne (FES-DMD-D4), sentar e levantar do solo, no período de um ano. MÉTODO: Estudo observacional, longitudinal e retrospectivo. Foi estudada, utilizando o software FES-DMDDATA, uma amostra com 25 pacientes na atividade sentar no solo e 28 pacientes para a atividade levantar do solo. As avaliações ocorreram a cada três meses no período de um ano. Para análise estatística da capacidade de resposta foram utilizados índices de tamanho de efeito, como, effect size (ES) e Standardized Response Mean (SRM). RESULTADOS: A responsividade da atividade de sentar no solo foi considerada baixa a moderada em intervalos de três meses (ES de 0.28 a 0.54 e SRM de 0.38 a 0.71), moderada a alta em intervalos de seis meses (ES de 0.69 a 1.07 e SRM de 0.86 a 1.19), alta em intervalos de nove meses (ES de 1.3 a 1.17 e SRM de 1.26 a 1.55) e doze meses (ES de 1.9 e SRM de 1.72). Na atividade levantar do solo, a responsividade variou em baixa, moderada e alta em intervalos de três meses (ES de 0.21 a 0.33 e SRM de 0.45 a 0.83), baixa a alta em intervalos de seis meses (ES de 0.46 a 0.59 e SRM de 0.73 a 0.97), moderada a alta em intervalos de nove meses (ES de 0.76 a 0.88 e SRM de 1.03 a 1.22) e alta em doze meses (ES de 1.14 e SRM de 1.25). CONCLUSÃO: Para detectar alterações clinicamente significativas e consistentes nas atividades funcionais sentar e levantar do solo recomendamos a utilização da FES-DMD-D4 em intervalos a partir de seis meses, pois foi neste período de tempo que a capacidade de resposta variou de moderada a alta
Resumo:
Springtails are commonly recognized microarthropods edaphic environments. Among the most common (and most visible) forms of these animals are the Entomobryoidea, one of the most diverse groups of springtails. Although more than 8,300 species of Collembola are registered on the globe, in Brazil a little over 310 species are recorded, mostly in the Southeast. In the Northeast, particularly in Rio Grande do Norte, these records are still reduced, even in the Atlantic Forest domain for this admittedly diverse fauna and specifically, for Entomobryoidea. This study aimed to describe new species of Entomobryoidea in urban remnants of Atlantic Forest in Rio Grande do Norte, specifically in Parque das Dunas, Natal in the Environmental Protection Area Genipabu, Extremoz. The collections were made in the months July and August 2012 and January and February 2013, using entomological vacuums and plastic trays. The specimens were identified in the laboratory and described in detail by looking at the literature. In this paper four new species were described Entomobryidae family: Entomobrya sp. nov. 1, Seira sp. nov. 1, Seira sp. nov. 2 and Trogolaphysa sp. nov. 1. Seira sp. nov. 1 has clear similarities to S. paraibensis, however the chaetotaxy of the mesothorax and abdomen IV distinguishes both species. The number of phylogenetic proximity suggests similarities between species. Seira sp. nov. 2 is characterized by its chaetotaxy, mainly in the 'M' head and his mesothorax. There is possibility of a phylogenetic relationship with S. praiana and S. Potiguara due to some similarities. Entomobrya sp. nov. 1 has little resemblance to Brazilian species, from the point of view of color, however there is for the latter detailing the dorsal chaetotaxy, which might obscure evolutionary relationships of proximity. Even so, the main diagnostic feature Entomobrya sp. nov. 1 compared to other species of the genus is the complexity of the chaetotaxy of the fifth abdominal segment. Descriptions of new species of Collembola, potentially endemic to their habitats of occurrence may help to understand the morphological and evolutionary patterns in the sampled taxa, as well as the preservation of the environments in which they were found.
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo:
The feeding habits and biological aspects of the reproductive cycle of two-spot astyanax, Astyanax cf. lacustris (Reinhardt, 1874) were investigated. Fish samples were captured on a monthly basis, using gillnets of 4 cm mesh size, from the Piató Lake, Assu, Rio Grande do Norte, during the period of September, 2006 to August, 2007. Physico-chemical parameters, such as, temperature, electrical conductivity and dissolved oxygen of the lake were registered. The monthly values of rainfall also were obtained. The 360 individuals captured, were measured, weighed, dissected, and stomach weight and the stage of gonadal maturity were registered. The stomach contents analyses were carried out based on volumetric method, points, frequency of occurrence and applying the Index of Relative Importance. The degrees of repletion of the stomachs were determined besides the Index of Repletion relating to feeding activity variations and frequency of ingestion with limnological parameters and rainfall. The food items identified were separated into distinct groups according to their origin. Sex ratio and Gonadosomatic Relation of females were verified to determine the spawning period and fecundity. The physico-chemical parameters presented the following annual mean values: temperature = 28.8ºC, electrical conductivity = 992.5 µS.cm-1; dissolved oxygen = 4.9 mg.L-1 during the study period. The annual mean of the rainfall was 63.5 mm. The results indicate that this species present an omnivorous feeding habit with a tendency towards insectivory, with an increase in feeding activity during the dry season. The aquatic oxygen to interfere very importance in the feeding activity than the others factors physico-chemicals of water and rainfall. There was a predominance of females, with a sex proportion of 1M:7F. The macroscopic characteristics of the ovaries and testicles revealed four stages of gonadal development: immature, maturing, mature and spent. A temporal variation was observed for the gonadal development of males and females. There was reproductive activity through out the year, with peaks in the months of February, April and June to correspond with the rain of precipitation of the region. The mean fecundity was 7.681 mature oocytes, varying from 4.476 to 12.036, with mean of 7.681. There was positive relation between fecundity and body mass. Condition Factor is not an efficient indicator of the reproductive period of this species. The species A. cf. lacustris is an opportunist and is well adapted to the conditions of the semi-arid Caatinga Biome