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231.
The imperative to further constrain extractive uses of natural resources will strengthen as resources degrade through over-use
or exposure to climate changes. Here, we explore an approach to increase the support for marine conservation among coral reef
fishers. We explore the proposition that resource dependency in the Egyptian Red Sea can act as a barrier to conservation.
We administered face-to-face surveys to 49% of the fishing industry to: (i) identify the level of compliance to the local
marine protected area (MPA), (ii) assess the level of dependency on marine resources in the region and (iii) examine the relationship
between resource dependency and conservation attitudes. Only 11.4% of fishers were aware of the MPA. Fishers were mostly limited
in their social flexibility and livelihood options. Results suggest that resource dependency is highly and negatively correlated
with conservation attitudes suggesting that management efforts need to seriously focus on reducing dependency if conservation
goals are to be met. 相似文献
232.
Recent developments of safer formulations
of agrochemicals 总被引:2,自引:0,他引:2
Alan Knowles 《The Environmentalist》2008,28(1):35-44
The primary objectives of formulation technology are to optimise the biological activity of the pesticide, and to give a product
which is safe and convenient for use. However, because of the wide variety of pesticide active ingredients which are available,
many different types of formulations have been developed depending mainly on the physico-chemical properties of the active
ingredients. In the past most formulations were based on simple solutions in water (SL), emulsifiable concentrates in a petroleum-based
solvent (EC), or dusts (DP) and wettable powders (WP). The presence of petroleum-based solvents in EC formulations and dusty
powders in DP and WP formulations can lead to safety hazards in use and a negative impact on the envirnoment generally. Most
government and regulatory authorities are now demanding formulations which are cleaner and safer for the user, have minimal
impact on the environment, and can be applied at the lowest dose rate. Developments in formulation technology and novel formulation
types, sometimes in special packaging such as water-soluble packs, can also give products a competitive advantage, add value
or extend the lif-cycle of active ingredients. There is also a demand from government authorities and consumer groups to use
safer formulation additives and adjuvants, and to minimise the residues of pesticides on food crops after spraying. All of
these aspects are putting increasing pressure on the development of improved formulation and adjuvant technologies. Pesticide
formulations for spray application and for seed treatment are discussed, along with developments in bioenchancement. 相似文献
233.
The field of environmental psychology is primely placed to further understanding of the way in which social capital influences or is influenced by the context and characteristics of neighbourhood environments, but has been one of the quieter voices in the cacophony of social capital discourse over the last decade. While there is increasing research interest in area and neighbourhood variations in social capital, the mechanisms and causal pathways through which physical environments, social capital and health may be related are not yet clear. More refined unpacking of the relationship between social capital and neighbourhood design, features and settings is required to identify practical intervention points for preserving, fostering and harnessing social capital within communities. Through a review of literature, this paper explores whether there is a place for social capital in the psychology of place and considers the contribution that environmental psychology and related disciplines could make to future social capital research and applications. 相似文献
234.
Kelly S. Fielding Rachel McDonald Winnifred R. Louis 《Journal of environmental psychology》2008,28(4):318-326
This study incorporated identity constructs into the theory of planned behaviour (TPB) to investigate intentions to engage in environmental activism. First year students and participants of a students of sustainability conference (n=169) were administered a questionnaire survey that measured standard TPB constructs as well as environmental group membership and self-identity as an environmental activist. Consistent with predictions, environmental group membership and self-identity were positive predictors of intentions. Thus, greater involvement in environmental groups and a stronger sense of the self as an environmental activist were associated with stronger intentions to engage in environmental activism. There was also evidence that self-identity was a stronger predictor of intentions for participants with low rather than high environmental group membership. In accordance with the standard TPB model, participants with more positive attitudes toward and a greater sense of normative support for environmental activism also had greater intentions to engage in the behaviour. The implications for groups seeking to harness support for activities to protect the environment are discussed. 相似文献
235.
Visitor use surveys and water quality data indicates that high visitor use levels of two rivers in Puerto Rico does not appear
to adversely affect several water quality parameters. Optimum visitor use to maximize visitor defined satisfaction is a more
constraining limit on visitor use than water quality. Our multiple regression analysis suggests that visitor use of about
150 visitors per day yields the highest level of visitor reported satisfaction, a level that does not appear to affect turbidity
of the river. This high level of visitor use may be related to the gregarious nature of Puerto Ricans and their tolerance
for crowding on this densely populated island. The daily peak visitation model indicates that regulating the number of parking
spaces may be the most effective way to keep visitor use within the social carrying capacity. 相似文献
236.
This article responds to Gray’s (2002) call for normative research on social and environmental accounting (SEA) and Parker’s (2005) call for active engagement in the process of designing SEA systems. More specifically, our investigation focuses on the
study of boundary setting for triple bottom line (TBL) reporting, an issue that has been given more attention by practitioners
than by researchers. The study reviews the consequences of boundary setting for the discharge of organizational accountability,
from which it develops a framework to investigate TBL reporting boundaries and then reports on an empirical survey of best
practice. It concludes that organizations are strategically setting and disclosing their boundaries instead of discharging
their accountability and argues that such strategies have far-reaching consequences, because reporting boundaries are not
only reflective of organizations but also have a constitutive role in their definition. A further consequence is that it calls
into question the use of voluntary labeling, such as “in accordance” with Global Reporting Initiative; one implication being
that further research into technical developments in TBL reporting could contribute to the discharge of organizational accountability. 相似文献
237.
Ana Delgado 《Journal of Agricultural and Environmental Ethics》2008,21(6):559-577
In science and environmental studies, there is a general concern for the democratization of the expert-lay interplay. However, the democratization of expertise does not necessarily lead to more sustainable decisions. If citizens do not take the sustainable choice, what should experts and decision makers do? Should the expert-lay interplay be dissolved? In thinking about how to shape the expert-lay interplay in a better way in agro-biodiversity conservation, I take the case of the MST (Movimento Sem Terra/Landless People’s Movement), possibly the largest rural movement in Latin America. The MST is in a process of turning towards environmentalism. It has adopted agroecology, a democratically oriented knowledge field. However, not all of the farmers were willing to adopt new environmentalist ideas and practices. Through ethnographic research, I analyze how expertise was recognized and redistributed within the MST, attending particularly to the role of MST coordinators and technicians. I explore how participation was framed and put into action. The adoption of agroecology brought to the MST a new and more inclusive map of expertise, but it also influenced new social distinctions within the communities. In part, farmers’ knowledge was labeled as ignorance. This may close down possibilities for dialogue as well as for sustainability. The paper suggests that experts’ power for discriminating among lay knowledges should come together with a responsibility for opening spaces for dialogue and action. One way of doing so could be by adding “interactional reflexivity” to experts’ expertise. 相似文献
238.
Kunisue T Higaki Y Isobe T Takahashi S Subramanian A Tanabe S 《Environmental pollution (Barking, Essex : 1987)》2008,154(2):272-282
The present study determined concentrations and patterns of polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) in specimens of open sea, and Japanese coastal and inland avian species, which have been stored in the Environmental Specimen Bank of Ehime University (es-Bank), to examine the spatial trends. PBDEs and PCBs were detected in all the muscle samples analyzed, suggesting that PBDE pollution has spread even to the remote open sea areas, as in the case of PCBs. Japanese coastal and inland birds accumulated higher concentrations of PBDEs than open sea birds. In addition, higher PBDE/PCB concentration ratios were observed in Japanese coastal and inland birds than in open sea birds, indicating the input of PBDEs into the Japanese terrestrial environment. Compositions of PBDEs varied among avian species with a predominance of BDE47 or BDE153. This could be due to differences in their habitat, food habit and/or biotransformation capacity of PBDEs. 相似文献
239.
Douglas A. Harned J. Brian Atkins John S. Harvill 《Journal of the American Water Resources Association》2004,40(3):765-793
ABSTRACT: A nutrient mass balance — accounting for nutrient inputs from atmospheric deposition, fertilizer, crop nitrogen fixation, and point source effluents; and nutrient outputs, including crop harvest and storage — was calculated for 18 subbasins in the Mobile River Basin, and trends (1970 to 1997) were evaluated as part of the U.S. Geological Survey National Water Quality Assessment (NAWQA) Program. Agricultural nonpoint nitrogen and phosphorus sources and urban nonpoint nitrogen sources are the most important factors associated with nutrients in this system. More than 30 percent of nitrogen yield in two basins and phosphorus yield in eight basins can be attributed to urban point source nutrient inputs. The total nitrogen yield (1.3 tons per square mile per year) for the Tombigbee River, which drains a greater percentage of agricultural (row crop) land use, was larger than the total nitrogen yield (0.99 tons per square mile per year) for the Alabama River. Decreasing trends of total nitrogen concentrations in the Tombigbee and Alabama Rivers indicate that a reduction occurred from 1975 to 1997 in the nitrogen contributions to Mobile Bay from the Mobile River. Nitrogen concentrations also decreased (1980 to 1995) in the Black Warrior River, one of the major tributaries to the Tombigbee River. Total phosphorus concentrations increased from 1970 to 1996 at three urban influenced sites on the Etowah River in Georgia. Multiple regression analysis indicates a distinct association between water quality in the streams of the Mobile River drainage basin and agricultural activities in the basin. 相似文献
240.
Summary In Bombus terrestris females, dominant status is correlated with high levels of juvenile hormone (JH) biosynthesis and rapid oöcyte maturation. Queenright workers, which are inhibited by the dominant queen, complete the cycle of oöcyte maturation while exhibiting a continuous low rate of JH production, but their egglaying is inhibited. Measurements in foundress queens suggest that the low JH titer during oögenesis is probably not responsible for the inhibition of egg-laying. Queenless workers, kept individually, are not activated either for JH production or oöcyte maturation. In groups of three queenless workers, a dominance order becomes established and high rates of JH synthesis are observed in the dominant egg-laying workers, with low rates in subordinated workers. In groups of founder queens, also, a dominance order becomes established and results in a reduced rate of JH production in subordinated females.
Correspondence to: F. Couillaud 相似文献