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《Marine Policy》2015
What have been the moral values and practices allowing equitable economic opportunities and a sense of fairness in North American small-scale fisheries? How have these “moral economies” been affected by neoliberal policies with their emphasis on efficiency, rational self-interest, and wealth accumulation? Focusing especially on the salmon and halibut fisheries in British Columbia, Canada, this discussion summarizes key findings on the manner in which small-scale fisheries and their moral practices tend to be marginalized and undervalued under neoliberal regimes. The paper considers the value of these moral economies for promoting social, economic, and ecological welfare as grounds for the expansion of small-scale fisheries. 相似文献
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Marine legislation world-wide has, as a recent final objective, the maintenance of a good environmental or ecological status for marine waters, habitats and resources. The concept of environmental status takes into account the structure, function and processes of marine ecosystems, bringing together physical, chemical, physiographic, geographic and climatic factors: subsequently, integrating such conditions, with anthropogenic impacts and activities undertaken in the area concerned. Such an approach is intended to permit an assessment of the environmental status at the ecosystem level, i.e. ‘ecosystem-based approach’, or ‘ecosystem-based management’.Such legislation emphasises the need for the development of methodologies, to assess environmental status. As such the knowledge acquired within Regional Seas, discussed at International Symposia and, finally, published as Special Issues, can serve as the basis for a regional ecosystem-based approach to management and the integrative assessment of marine systems. Hence, the Bay of Biscay is used in this contribution, as an example, to show past and present research, together with perspectives for the future. It is concluded that collaboration between institutions (marine research institutes, universities) and countries (France, Spain, Portugal, the United Kingdom and Ireland) could result in an interesting ‘case-study’, for the further implementation of the European Marine Strategy Framework Directive, at the level of this particular Regional Sea. In this way, the experience gained in the implementation of the Water Framework Directive within the ecoregion, together with the information collated in the eleven International Symposia of Oceanography of the Bay of Biscay, celebrated until now, can be very useful, for an ecosystem-based management approach for this Regional Sea. 相似文献
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Validation of the AZTI's Fish Index (AFI), proposed for the Basque Country (northern Spain), in assessing fish quality within the Water Framework Directive (WFD), is undertaken. The response to anthropogenic pressure is investigated, in setting the boundaries between the different quality status classes. Hence, 12 estuaries were sampled, at different frequencies, between 1989 and 2007, by means of a beam trawl. Significant (p < 0.0001) correlations were found between the AFI and oxygen saturation and ammonia. Oxygen quality standards are used to set boundaries between quality classes. Then, the AFIs obtained are compared with different anthropogenic pressures, including urban and industrial discharges, engineering works and dredging. The effects of the removal of some of these pressures are also studied. The total number of pressures within an estuary shows significant (p < 0.009) negative correlation with AFI, explaining between 51 and 62% of the variability in fish quality. The impact of pressures upon fish and demersal assemblages is detected as required by the WFD. Nonetheless, further investigation and intercalibration of the methods used, are necessary. 相似文献
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《Marine Policy》2013
Human activities in ocean environments have resulted in significant impacts to ocean health and diminishing returns to society from these ecosystems. In response, there have been increasing calls for implementing ecosystem-based approaches to ocean planning and management. Such approaches require consideration of the complexity of human relationships with ecosystems including their social, cultural, political, and economic dimensions in order to develop and implement management viable strategies. This article reviews progress in spatial research on human activities and social dimensions of ocean environments and explores the promise this research has for enhancing ecosystem-based ocean planning. A global review reveals growth in the number and sophistication of research on social dimensions of oceans, with an increasing focus on new tools and technologies that involve stakeholders in the production, maintenance, and use of data in planning processes. Notably, most research is undertaken in the developed rather than the developing world, pointing to possible discrepancies in the capacity and resources required to engage this research. There is promising, albeit limited, evidence for the successful use of social data and applied research approaches in ecosystem-based ocean planning initiatives. This review shows that spatial research on the human dimensions of the ocean environments has much potential to engender a more comprehensive understanding of these complex seascapes, and to aid in planning processes aimed at achieving sustainable social and ecological outcomes. 相似文献
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Assessing the benthic quality status of the Bohai Bay (China) with proposed modifications of M-AMBI 总被引：1，自引：1，他引：0
Multivariate AZTI's Marine Biotic Index (M-AMBI) was designed to indicate the ecological status of European coastal areas. Based upon samples collected from 2009 to 2012 in the Bohai Bay, we have tested the response of variations of M-AMBI, using biomass (M-BAMBI) in the calculations, with different transformations of the raw data. The results showed that the ecological quality of most areas in the study indicated by M-AMBI was from moderate to bad status with the worse status in the coastal areas, especially around the estuaries, harbors and outfalls, and better status in the offshore areas except the area close to oil platforms or disposal sites. Despite large variations in nature of the input data, all variations of M-AMBI gave similar spatial and temporal distribution patterns of the ecological status within the bay, and showed high correlation between them. The agreement of new ecological status obtained from all M-AMBI variations, which were calculated according to linear regression, was almost perfect. The benthic quality, assessed using different input data, could be related to human pressures in the bay, such as water discharges, land reclamation, dredged sediment and drilling cuts disposal sites. It seems that M-BAMBI were more effective than M-NABMI (M-AMBI calculated using abundance data) in indicating human pressures of the Bay. Finally, indices calculated with more severe transformations, such as presence/absence data, could not indicate the higher density of human pressures in the coastal areas of the north part of our study area, but those calculated using mild transformation (i.e., square root) did. 相似文献
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Medium- and Long-term Recovery of Estuarine and Coastal Ecosystems: Patterns,Rates and Restoration Effectiveness 总被引：1，自引：0，他引：1
Ángel Borja Daniel M. Dauer Michael Elliott Charles A. Simenstad 《Estuaries and Coasts》2010,33(6):1249-1260
Many estuarine and coastal marine ecosystems have increasingly experienced degradation caused by multiple stressors. Anthropogenic
pressures alter natural ecosystems and the ecosystems are not considered to have recovered unless secondary succession has
returned the ecosystem to the pre-existing condition or state. However, depending upon the scales of time, space and intensity
of anthropogenic disturbance, return along the historic trajectory of the ecosystem may: (1) follow natural restoration though
secondary succession; (2) be re-directed through ecological restoration, or (3) be unattainable. In order to address the gaps
in knowledge about restoration and recovery of estuarine and coastal ecosystems, this special feature includes the present
overview and other contributions to provide a synthesis of our knowledge about recovery patterns, rates and restoration effectiveness.
From the 51 examples collated in this contribution, we refine the recovery from the list of stressors into six recovery mechanisms:
(1) recovery from sediment modification, which includes all aspects of dredging and disposal; (2) recovery by complete removal
of stressors limiting natural ecosystem processes, which includes tidal marsh and inundation restoration; (3) recovery by
speed of organic degradation, which includes oil discharge, fish farm wastes, sewage disposal, and paper mill waste; (4) recovery
from persistent pollutants, which includes chemical discharges, such as TBT; (5) recovery from excessive biological removal,
related to fisheries and (6) recovery from hydrological and morphological modification. Drawing upon experience both from
these many examples and from an example of one comprehensive study, we show that although in some cases recovery can take
<5 years, especially for the short-lived and high-turnover biological components, full recovery of coastal marine and estuarine
ecosystems from over a century of degradation can take a minimum of 15–25 years for attainment of the original biotic composition
and diversity may lag far beyond that period. 相似文献
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Agencies in the US with oversight for marine renewable energy development idealistically have sought space where this new use might proceed unhindered by other uses. Despite experiential evidence of spatial overlap among existing ocean uses, a lack of documentation made the identification of potential space-use conflicts, communication between existing and potential ocean users, and the design of mitigation exceedingly challenging.We conducted a study along the US Atlantic and Pacific coasts to gather and document available spatial information on existing use through a compilation and organization of geographic information system (GIS) data. Stakeholder group meetings were used to vet the collected spatial data, and ethnographic interviews were conducted to gather knowledge and cultural perspectives. Results show extensive coverage and overlap of existing ocean space uses and provide a visualization of the social and cultural landscape of the ocean that managers can use to determine which stakeholders to engage.Marine resource managers are encouraged to recognize that marine space use is dynamic and multi-dimensional and as such research thereof requires a balance between the efficiency of GIS and the stories captured and told by ethnographic research. There are important linkages within and across fisheries and other uses, communities and interests, and across the land–sea interface. Therefore, it is important to use techniques demonstrated in this research that (1) integrate ethnographic and geospatial data collection and analysis; (2) engage stakeholders throughout the process; and (3) recognize the unique qualities of each geographic location and user group to support sound decision-making. 相似文献