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101.
Identifying Determinants of Nations' Wetland Management Programs Using Structural Equation Modeling: An Exploratory Analysis 总被引:1,自引:0,他引:1
La Peyre MK Mendelssohn IA Reams MA Templet PH Grace JB 《Environmental management》2001,27(6):859-868
Integrated management and policy models suggest that solutions to environmental issues may be linked to the socioeconomic
and political characteristics of a nation. In this study, we empirically explore these suggestions by applying them to the
wetland management activities of nations. Structural equation modeling was used to evaluate a model of national wetland management
effort and one of national wetland protection. Using five predictor variables of social capital, economic capital, environmental
and political characteristics, and land-use pressure, the multivariate models were able to explain 60% of the variation in
nations' wetland protection efforts based on data from 90 nations, as defined by level of participation in the international
wetland convention. Social capital had the largest direct effect on wetland protection efforts, suggesting that increased
social development may eventually lead to better wetland protection. In contrast, increasing economic development had a negative
linear relationship with wetland protection efforts, suggesting the need for explicit wetland protection programs as nations
continue to focus on economic development. Government, environmental characteristics, and land-use pressure also had a positive
direct effect on wetland protection, and mediated the effect of social capital on wetland protection. Explicit wetland protection
policies, combined with a focus on social development, would lead to better wetland protection at the national level. 相似文献
102.
Fabia Barbosa Silva Alan Carlos Costa Clarice Aparecida Megguer Júlien Silva Lima Priscila Ferreira Batista Deborah Amorim Martins Gabriel Martins Almeida Marisa Domingos Caroline Müller 《环境质量管理》2021,30(3):17-25
The economic basis of the Brazilian midwest is agriculture, concentrating most of the grain production in the country. With the purpose of increasing yield, farmers have intensified land use and the use of atrazine among other pesticides, which can supposedly compromise human health and photosynthetic metabolism of plant species from Cerrado, such as Handroanthus heptaphyllus. The aim of this study was to determine experimentally the sensitivity level of H. heptaphyllus to atrazine, by measuring gas exchange, chlorophyll a fluorescence, chloroplastidic pigments, and membrane permeability. The experiment was conducted in a factorial scheme. Nine‐month‐old H. heptaphyllus plants were treated with six realistic doses of atrazine: 0, 25, 50, 100, 200, and 400 g a.i. ha–1 (corresponding to 10, 20, 40, 80, and 100% of the commercial dose recommended for corn crops, respectively), with five replications. Evaluations were performed at 12, 36, 84, 180, and 276 h after treatment application. Photosynthesis, the effective quantum yield of photosystem II, and electron transport rate were gradually reduced by the action of atrazine. On the other hand, the nonphotochemical quenching increased gradually, which indicates that this mechanism was not sufficient to avoid oxidative stress and cellular damage in H. heptaphyllus treated plants. Based on these results, we concluded that the action of the herbicide in the photosynthetic reduction occurs by the electron transport rate limitation. Therefore, H. heptaphyllus trees are at risk in Cerrado areas next to agricultural lands. 相似文献
103.
de Oliveira Sueli Aparecida Camani Paulo Henrique da Silva Barbosa Rennan Felix Rocha Daniel Belchior Mitra Sushanta K. dos Santos Rosa Derval 《Journal of Polymers and the Environment》2022,30(1):270-294
Journal of Polymers and the Environment - There is a scientific consensus that the use of membranes for water filtration presents itself as a promising research area for removing a wide range of... 相似文献
104.
Carvalho Thayane Ferreira Carvalho Aline Cristina Zanuncio José Cola de Oliveira Marcio Leles Romarco Machado Evandro Luiz Mendonça José Anderson Cleiton Santos José Barbosa Pereira Israel Marinho 《Environmental science and pollution research international》2022,29(10):14195-14205
Environmental Science and Pollution Research - Pteridium aquilinum (Dennstaedtiaceae) colonization affects ecological and restoration processes. The knowledge of the impacts on the ecological... 相似文献
105.
Barbosa Márcio Zago de Oliveira Dias Josinaldo Marvila Markssuel Teixeira de Azevedo Afonso R. G. 《Environmental science and pollution research international》2022,29(7):9957-9970
Environmental Science and Pollution Research - The use of the ornamental stone wastes, such as the originated from granite or marble, has been the subject of technological studies that evaluated... 相似文献
106.
da Silva Barbosa Ferreira Eduardo Luna Carlos Bruno Barreto Siqueira Danilo Diniz Araújo Edcleide Maria de França Danyelle Campos Wellen Renate Maria Ramos 《Journal of Polymers and the Environment》2022,30(2):541-554
Journal of Polymers and the Environment - PLA has aroused industrial and scientific interest in recent years, mainly due to its biodegradable character. However, PLA is brittle and displays low... 相似文献