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771.
dos Santos Reginaldo Carvalho da Silva Junior Carlos Antonio Battirola Leandro Denis Lima Mendelson 《Environment, Development and Sustainability》2022,24(3):3356-3370
Environment, Development and Sustainability - This paper evaluates compliance with environmental laws in the municipality of Sorriso and the impact of changing legislation on vegetation. To verify... 相似文献
772.
This study aimed at the ecological-economic valuation of the Potengi estuary mangrove wetlands, based on the integration of
spatial data (mangrove forest coverage map, Nautical Chart, Environmental Sensitivity Chart) with data from literature on
the biogeochemistry of nitrogen (N), phosphorus (P), and heavy metals in the mangrove estuary wetland Potengi) and field verification
data (topographic profile of mangrove forest, GPS routes obtained in the field in the touristy sightseeing areas and plots
of mariculture). The ecological and economic valuation of the services performed by the Potengi estuary mangrove wetlands,
mainly as biogeochemical barrier for the transport of P, N and heavy metals in tropical coastal areas, were obtained just
as if the retention of those elements was necessary by Wastewater Treatment Plants (WTP) with Stabilization Ponds, typical
in the estuary, and Zeolitic plant, respectively. Closer to real scenarios were observed for obtaining the values of these
ecological services, such as the release of the P, N and heavy metals in domestic and industrial sewage in the estuary, the
capability of dilution and the influence of the tides in the estuary. The tourism potential of the Potengi estuary mangrove
wetlands were assessed according to the current forms of use, and potential of aquaculture through the main types of farming
in mangrove areas. For these ecological services, considerable values were obtained of about USS15,500/ha, such as costs of
implementation and construction of sewage treatment plants, as well as costs of sewage treatment plants. Nearly US$ 12.500
/ ha amount each year from tourism and aquaculture income, demonstrating the economic viability of the Potengi estuary mangrove
wetlands conservation. 相似文献
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776.
Mercury pollution in the Tapajos River basin, Amazon: mercury level of head hair and health effects.
M Harada J Nakanishi E Yasoda M C Pinheiro T Oikawa G de Assis Guimaraes B da Silva Cardoso T Kizaki H Ohno 《Environment international》2001,27(4):285-290
There is increasing concern about the potential neurotoxic effects of exposure to methylmercury for the 6 million people living in the Amazon, even in regions situated far away from the gold mines (garimpos), considered to be the major source of mercury pollution. In November 1998, a spot investigation on mercury contamination was conducted in three fishing villages (Barreiras, Rainha, and Sao Luiz do Tapajos) on the Tapajos River, an effluent of the Amazon, situated several hundred kilometers downstream from the gold-mining areas. A total of 132 fishermen and their families volunteered for the current study. As was anticipated, the total mercury levels in the head hair collected from the fishing villages were relatively high (14.1-20.8 ppm on the average) and the number of subjects with a high total mercury level over 10 ppm (the least upper bound of a normal value) was 103 (78.0%) in total, along with various symptoms, thereby suggesting wide mercury contamination in the Tapajos River basin. Moreover, in view of the absence of other diseases (e.g., alcoholism or malaria), a high intake of fish containing a methylmercury level, and high hair mercury levels in addition to the various symptoms such as sensory disturbance (especially glove-and-stocking type, which is characteristic of Minamata disease), tremor, failure in two-point discrimination, and slight balancing failure, several subjects examined were diagnosed with mild Minamata disease. The findings obtained suggest, thus, that the mercury pollution in the Amazon should be crucially observed for head hair mercury level and health in a much broader region. 相似文献
777.
Dielle Monteiro Teixeira Juliana Merces Hernandez Luciana Damascena Silva Darleise de Souza Oliveira Paula Katharine de Pontes Spada Tereza Cristina Monteiro Gurjão Joana D’Arc Pereira Mascarenhas Alexandre Costa Linhares Lena Líllian Canto de Sá Morais Yvone Benchimol Gabbay 《Food and environmental virology》2016,8(1):101-104
Noroviruses are the major cause of non-bacterial acute gastroenteritis outbreaks in humans, with few reports about the occurrence of the norovirus GIV strain. We investigated the presence of norovirus GIV in surface water (river, bay, and stream) and untreated sewage, and we determined a positivity rate of 9.4 % (9/96). The strains genotyped were GIV.1. To our knowledge, this is the first report of GIV in Brazil. 相似文献
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L. Silva F. Saporit D. Vales M. Tavares P. Gandini E. A. Crespo L. Cardona 《Marine Biology》2014,161(5):1195-1206
In diving seabirds, sexual dimorphism in size often results in sex-related differences of foraging patterns. Previous research on Magellanic penguins, conducted during the breeding season, failed to reveal consistent differences between the sexes on foraging behavior, despite sexual dimorphism. In this paper, we tested the hypothesis that male and female Magellanic penguins differ in diet and foraging patterns during the non-breeding period when the constraints imposed by chick rearing activities vanish. We used stable isotope ratios of carbon and nitrogen in feather and bone to characterize the diet and foraging patterns of male and female penguins in the South Atlantic at the beginning of the 2009–2010 and 2010–2011 post-breeding seasons (feathers) and over several consecutive breeding and migratory seasons (bone). The mean δ13C and δ15N values of feathers showed no differences between the sexes in any of the three regions considered or in the diet composition between the sexes from identical breeding regions; however, Bayesian ellipses showed a higher isotopic niche width in males at the beginning of the post-breeding season. Stable isotope ratios in bone revealed the enrichment of males with δ13C compared with females across the three regions considered. Furthermore, the Bayesian ellipses were larger for males and encompassed those of females in two of the three regions analyzed. These results suggest a differential use of winter resources between the sexes, with males typically showing a larger diversity of foraging/migratory strategies. The results also show that dietary differences between male and female Magellanic penguins may occur once the constraints imposed by chick rearing activities cease at the beginning of the post-breeding season. 相似文献
780.
A. P. Reis C. Patinha J. Wragg A. C. Dias M. Cave A. J. Sousa C. Costa A. Cachada E. Ferreira da Silva F. Rocha A. Duarte 《Environmental geochemistry and health》2014,36(5):867-881
An urban survey of Lisbon, the largest city in Portugal, was carried out to investigate its environmental burden, emphasizing metallic elements and their public health impacts. This paper examines the geochemistry of lead (Pb) and its influence on human health data. A total of 51 soil samples were collected from urban recreational areas used by children to play outdoors. The semi-quantitative analysis of Pb was carried out by inductively coupled plasma mass spectrometry after an acid digestion. X-ray diffraction was used to characterize the soil mineralogy. The solid-phase distribution of Pb in the urban soils was investigated on a subset of 7 soils, out of a total of 51 samples, using a non-specific sequential extraction method coupled with chemometric analysis. Oral bioaccessibility measurements were obtained using the Unified BARGE Method developed by the Bioaccessibility Research Group of Europe. The objectives of the study are as follows: (1) investigation of Pb solid-phase distribution; (2) interpretation of Pb oral bioaccessibility measurements; (3) integration of metal geochemistry with human health data; and (4) understanding the influence of geochemistry and mineralogy on oral bioaccessibility. The results show that the bioaccessible fraction of Pb is lower when major metal fractions are associated with less soluble soil phases such as Fe oxyhydroxides, and more increased when the metal is in the highly soluble carbonate phase. However, there is some evidence that the proportion of carbonates in the soil environment is also a key control over the oral bioaccessibility of Pb, irrespective of its solid-phase fractionation. 相似文献