982 resultados para Estação Ecológica de Juréia-Itatins (SP)


Relevância:

100.00% 100.00%

Publicador:

Resumo:

Few studies have evaluated long-term changes in avian abundance in forest remnants. To compare both species richness and abundance of the bird community in a forest fragment located in the municipality of Gália, state of São Paulo, southeastern Brazil, we surveyed forest birds using transect counts. We compared our results with a survey conducted 30 years earlier at the same locality and further classified bird species according to their food habits to eventually predict fluctuations of specific abundance. Although species with population declines predominated in the community, all trophic categories had species which increased their abundances. Most species prone to move around remnants decreased in abundance. We suggest that, regarding specific abundances, trophic categories may be equally affected as a result of fragmentation processes and that the forest regeneration of this remnant may have led to the loss of edge species. Species that suffered from abundance loss during this time period may become locally extinct in the near future.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The genus Hemidactylus Oken, 1817 has cosmopolite distribution, with three species occurring in Brazil, two of them native, H. brasilianus and H. agrius, and one exotic, H. mabouia. Considering the studies about ecology of lizards conducted in the Ecological Station of the Seridó, from 2001 to 2011, this study aimed (1) to re-evaluate the occurrence of the species of Hemidactylus in this ESEC; (2) to analyze ecological and biological aspects of the H. agrius population; and (3) to investigate the current and potential distribution of the native species of the genus in northeastern Brazil, analyzing the suitability of ESEC to this taxon. For the first two objectives, a sampling area consisting of five transects of 200 x 20 m, was inspected in alternating daily shifts for three consecutive days, from August 2012 to August 2013. For the latter objective, occurrence points of H. agrius and H. brasilianus from literature and from the database of Herpetological Collections of the UFRN and the UNICAMP were consulted to build predictive maps via the Maximum Entropy algorithm (MaxEnt). In ESEC Seridó, 62 H. agrius individuals were collected (25 females, 18 males and 19 juveniles), and two neonates were obtained from a communal nest incubated in the laboratory. No record was made for the other two species of the genus. Hemidactylus agrius demonstrated to be a nocturnal species specialized in habitats with rocky outcrops; but this species is generalist regarding microhabitat use. In the population studied, females had an average body length greater than males, and showed higher frequencies of caudal autotomy. Regarding diet, H. agrius is a moderately generalist species that consumes arthropods, especially insect larvae, Isoptera and Araneae; and vertebrates, with a case of cannibalism registered in the population. With respect to seasonal differences, only the number of food items ingested differed between seasons. The diet was similar between sexes, but ontogenetic differences were recorded for the total volume and maximum length of the food items. Significant relationships were found between lizard body/head size measurements and the maximum length of prey consumed. Cases of polydactyly and tail bifurcation were recorded in the population, with frequencies of 1.6% and 3.1%, respectively. In relation xv to the occurrence points of the native species, 27 were identified, 14 for H. agrius and 13 for H. brasilianus. The first species presented restricted distribution, while the second showed a wide distribution. In both models generated, the ESEC Seridó area showed medium to high suitability. The results of this study confirm the absence of H. brasilianus and H. mabouia this ESEC, and reveal H. agrius as a dietary opportunist and cannibal species. Further, the results confirm the distribution patterns shown by native species of Hemidactylus, and point ESEC Seridó as an area of probable occurrence for the species of the genus, the establishing of H. brasilianus and H. mabouia are probably limited by biotic factors, a fact yet little understood

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Environmental degradation is a global problem that particularly affects areas subject to seasonal climatic variations, such as the brazilian semiarid region, namely the Caatinga Domain. Combined with other negative factors, such as natural resource misuse and disorderly land occupation, the consequences of Environmental Degradation have challenged science in the quest for addressing the resulting social and environmental problems. Accordingly, Environmental Perception methodology, by analyzing the concepts, attitudes and values, (especially those pertaining to environmental conservation) represent an important tool in studies that address the relationship between the environment and human actions. Sustainability Indicators are also relevant tools to assess the possible causes and consequences of environmental problems. Among several Sustainability Indicators available, the PressuresState-Impact-Response (PSIR) method is an analytical tool that permits the grouping of factors affecting sustainability as well as their consequences for nature and human health, and thus indicate mitigating actions for society and the public authorities. From this perspective, three areas of Caatinga were studied in Rio Grande do Norte state: Seridó Ecological Station (ESEC), Municipality of Serra Negra do Norte; Private Natural Reserve Stoessel de Brito (PNRSB), Municipality of Jucurutu; and part of the Serra de Santana, Municipality of Tenente Laurentino Cruz. The areas are both legally protected and unprotected and subject to diferent management protocols, though their share the common characteristic of human misuse of natural resources. In this scenario, this thesis´ main goal was to introduce the rural communities into the conservation process, using the results of Environmental Perception of such communities, combined with the analysis of the sustainability of municipalities through PSIR. Information on Environmental Perception was obtained from primary and secondary data from previous studies carried out in the ESEC Seridó and PRNP Stoessel de Brito. Additional data was obtained through direct observation and interview forms applied to rural communities in the Municipality of Tenente Laurentino Cruz. The results showed that respondents possessed a broad knowledge regarding environmental degradation, its causes and consequences for the caatinga biome. PEIR analysis showed that environmental degradation was smaller in countries with protected areas, as compared to those without. The population´s knowledge about environmental degradation and their acceptance of conservation units, as showed by Environmental Perception Analysis, coupled with the results of PEIR, suggest that those attitudes may foster actions aimed at reduction of environmental degradation in the Caatinga domain

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The caatinga is considered the only exclusively Brazilian biome, with a total area of 735.000km². It is estimated that about 59% of this area has already been removed and only 2% are protected in conservations units. The region is characteristic by strong seasonality and heterogeneity in their environments. This paper sets generate information on morphological and population patterns Lanio pilatus in two areas of caatinga of Estação Ecológica do Seridó (ESEC – Seridó), Serra Negra do Norte - RN. Data collection was performed in six phases between July 2012 and December 2014, covering the end of the dry and rainy seasons in the region. The captures were performed with nets and individuals captured were marked with metal rings and measured (weight, wing length, tail, tarsus, culmen and tip of the bill to nostril). Through these measures, we observed that only males of open area range in weight during the dry and rainy season, youngs were significantly lower for all parameters measured, and males were larger than females in three characteristics (weight, wing length and tail) in open area and only one (wing length) in the closed area. The population parameters were generated from the mark-capture-recapture technique by program MARK, using the techniques of robust design and CJS. The survival probability of detection and population estimates varied with time. Only individuals of open area fluctuated in their estimates during the study. Overall, the environment was a great mediator of results which increases the need for more studies on the life history of the species in the region.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The composition of termite assemblages was analyzed at three Caatinga sites of the Seridó Ecological Station, located in the municipality of Serra Negra do Norte, in the state of Rio Grande do Norte, Brazil. These sites have been subjected to selective logging, and cleared for pasture and farming. A standardized sampling protocol for termite assemblages (30h/person/site) was conducted between September 2007 and February 2009. At each site we measured environmental variables, such as soil granulometry, pH and organic matter, necromass stock, vegetation height, tree density, stem diameter at ankle height (DAH) and the largest and the smallest crown width. Ten species of termites, belonging to eight genera and three families, were found at the three experimental sites. Four feeding-groups were sampled: wood-feeders, soil-feeders, wood-soil interface feeders and leaf-feeders. The wood-feeders were dominant in number of species and number of encounters at all sites. In general, the sites were not significantly different in relation to the environmental variables measured. The same pattern was observed for termite assemblages, where no significant differences in species richness, relative abundance and taxonomic and functional composition were observed between the three sites. The agreement between the composition of assemblages and environmental variables reinforces the potential of termites as biological indicators of habitat quality

Relevância:

100.00% 100.00%

Publicador:

Resumo:

A taxonomic survey of representatives of the genus Geastrum took place during the rainy season from 2006 to 2009 in four districts in the state of Rio Grande do Norte: Parque Estadual Dunas do Natal (Atlantic Forest), Mata do Jiqui EMPARN (Atlantic Forest) and Estação Ecológica do Seridó (Caatinga). Fourteen species were recorded: G. entomophilum, G. fimbriatum, G. hirsutum, G. javanicum, G. lageniforme, G. lloydianum, G. minimum, G. morganii, G. ovalisporum, G. pectinatum, G. saccatum, G. schweinitzii, G. setiferum and G. triplex. Of these species, eleven occurred in the Atlantic Forest and six in the Caatinga. A new species has been recorded to science, G. entomophilum, other as a first record for Brazil, G. morganii, six new records for the Northeast, and ten new records for Rio Grande do Norte. The material was tumbled in the Herbarium UFRN. Additionally, a survey of the species of the genus deposited in the Herbarium UFRN was accomplished, resulting in 244 herbarium specimens belonging to thirty-three species. Of these ones, twenty-three were collected in Brazil and ten are from Czech Republic, Europe, as donation from the VZ Herbarium

Relevância:

40.00% 40.00%

Publicador:

Resumo:

O desenvolvimento econômico e o meio ambiente estão indissoluvelmente vinculados e devem ser tratados mediante a mudança do conteúdo, das modalidades e das utilizações do crescimento, devendo ser levados em consideração critérios fundamentais de equidade social, prudência ecológica e eficiência econômica. Recentemente tem ocorrido uma intensificação do debate sobre as consequências do aumento sem precedentes da escala do sistema econômico sobre o capital natural da Terra. A Economia Ecológica preconiza a integração de conceitos das ciências econômicas e das demais ciências sociais e políticas e das ciências naturais, notadamente a Ecologia, oferecendo uma perspectiva integrada e biofísica das interações do meio ambiente. Assim, a Economia Ecológica traz implícita a ideia de uma agenda de pesquisa verdadeiramente "transdisciplinar" e está fundamentada na visão pré-analítica que considera a economia um subsistema inserido em um sistema maior, finito e materialmente fechado (porém, aberto ao fluxo energético solar). O enfoque deve, então, promover a sustentabilidade dos bens e serviços ecossistêmicos e, para tanto, deve estar apoiado em componentes estruturais como: "escala" sustentável de exploração; "alocação" dos bens e serviços ecossistêmicos; "distribuição" desses bens e serviços; e o "princípio da precaução".

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Os agricultores têm o importante papel de alimentar uma população crescente, fornecer matéria prima para inúmeras indústrias e para a geração de energia, tudo de forma saudável e sustentável. Também está nas mãos dos agricultores a grande responsabilidade de manter uma área de preservação em suas propriedades para garantir a qualidade do solo e água e conservação da flora e fauna. O novo código florestal - Lei nº. 12.651 de 25 de maio de 2012 - estabelece que todas as propriedades rurais devem manter áreas de reserva legal e de preservação permanente. A Estação Experimental de Holambra, estudada nesta dissertação, segue a Lei vigente. Esta Estação Experimental é uma pequena propriedade da multinacional Syngenta, localizada no município de Holambra, onde são testados agrotóxicos e sementes para fins de registro e pesquisa. Nesta propriedade são seguidas as boas práticas agrícolas, de tal forma que não ocorram contaminações de solo e água ou erosão. As áreas de preservação são de mata nativa e reflorestamento e são mantidas sem perturbações antrópicas. Foram feitos levantamentos da avifauna nas áreas de preservação permanente e de reserva legal nos anos de 2003, 2005, 2010 e 2013. Os dados de levantamento da avifauna indicaram uma tendência de aumento de diversidade e riqueza específica no decorrer dos anos. Além disso, foi visto um aumento de aves florestais, de cerrado e aquáticas, assim como aves com um perfil menos oportunista e de média sensibilidade às alterações antrópicas. Estes dados indicam uma evolução no índice ambiental da área. Apesar do uso intenso de insumos agrícolas na Estação Experimental, não foram encontradas aves mortas ou com sinais de intoxicação. Além disso, foram encontradas diversas aves de topo da cadeia alimentar, que poderiam estar acumulando toxinas, mas que cresceram em riqueza específica durante os levantamentos. Estes dados demonstram que as atividades da estação experimental não estão impactando a avifauna e que a manutenção e cuidado criterioso da área de preservação e seus arredores podem contribuir para a conservação da biodiversidade local.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

40.00% 40.00%

Publicador:

Resumo:

The slugde from decanters in Water Treatment Plants (WTP) has different composition varying, according to the region, coagulant type and dosages, the plant layout. In this work, the physical characterization of the sludge generated from decenties (ETAII the municipality of Rio Claro, Brazil), the manufacture of bodies of evidence-sludge mixture of clay (with humidity of 8% and concentrations of sludge, 5, 15 and 30%) the testing technology after burning the mixture to a temperature of 950 ° C were investigated. The main aim assess the possibility of its use as raw material in the ceramic red production. For comparison of the obtained results it was used values of the testing technology of bodies of evidence only with clay, prepared under the same conditions. In general, the addition of sludge from ETA made worse the properties of the ceramic body, however, the values obtained from the tests on the concentration of 5% of sludge, still remain within the acceptable limits for the production of red pottery pieces.

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Não disponível

Relevância:

40.00% 40.00%

Publicador:

Resumo:

Sociedades sustentáveis pressupõem o uso de recursos naturais na medida em que o limite de capacidade de suporte dos sistemas naturais não seja ultrapassado. Neste contexto, o uso de indicadores de sustentabilidade se coloca no importante papel de operacionalização do conceito de desenvolvimento sustentável. O método da Pegada Ecológica utiliza a conversão dos fluxos de matéria e energia utilizadas por uma população em áreas biologicamente produtivas para a provisão dos mesmos. No presente estudo, será feita uma aplicação deste método para a cidade de Rio Claro, contabilizando-se os principais itens e serviços consumidos pela população. Pretende-se inferir sobre a sustentabilidade na cidade, através da comparação entre a área apropriada para obtenção dos recursos consumidos e o próprio limite da área do município