共查询到7条相似文献,搜索用时 15 毫秒
1.
When spatial fishing data is fed into systematic conservation planning processes the cost to a fishery could be ensured to be minimal in the zoning of marine protected areas. We used vessel monitoring system (VMS) data to map the distribution of prawn trawling and calculate fishing intensity for 1-ha grid cells, in the Kosterhavet National Park (Sweden). We then used the software Marxan to generate cost-efficient reserve networks that represented every biotope in the Park. We asked what were the potential gains and losses in terms of fishing effort and species conservation of different planning scenarios. Given a conservation target of 10 % representation of each biotope, the fishery need not lose more than 20 % of its fishing grounds to give way to cost-efficient conservation of benthic diversity. No additional reserved area was needed to achieve conservation targets while minimizing fishing costs. We discuss the benefits of using VMS data for conservation planning. 相似文献
2.
Catherine Marina Pickering 《Ambio》2010,39(1):70-77
Protected areas represent the major method for conserving biodiversity. However, visitor use can threaten their conservation
value. Based on a review of recent research, I have categorized factors that affect the severity of environmental impacts
of visitor use. These factors need to be considered or evaluated when assessing visitor use of sites in protected areas. They
are: (i) the conservation value of the site, (ii) its resistance to use, (iii) its recovery from use, (iv) its susceptibility
to erosion, (v) the severity of direct impacts associated with specific activities, (vi) the severity of indirect impacts,
(vii) the amount of use, (viii) the social and (ix) ecological dimensions to the timing of use, and (x) the total area affected.
Although the factors may not be of equal importance or necessarily assessed on an equal scale, they allow people to make more
informed assessments of potential impacts, assist in identifying where monitoring may be required, and indicate where additional
site- or activity-specific research may be appropriate. 相似文献
3.
Marine protected areas (MPAs) are being promoted in Tanzania to mitigate the drivers of ecosystem change such as overfishing and other anthropogenic impacts on marine resources. The effectiveness of MPAs in managing those drivers was assessed in three ecological zones, seafront, mangrove, and riverine of Mnazi Bay Marine Park, using Participatory Community Analysis techniques, questionnaire survey, checklist and fishery resource assessment methods. Eleven major drivers of ecosystem change were identified. Resource dependence had a major effect in all ecological zones of the park. The results indicated that the park’s legislations/regulations, management procedures, and conservation efforts are reasonably effective in managing its resources. The positive signs accrued from conservation efforts have been realized by the communities in terms of increased catch/income, awareness and compliance. However, some natural and anthropogenic drivers continued to threaten the park’s sustainability. Furthermore, implementation of resource use and benefit sharing mechanisms still remained a considerable challenge to be addressed. 相似文献
4.
Departing from a theoretical methodology, we estimate empirically an index of adaptive capacity (IAC) of a fishing community to the establishment of marine protected areas (MPAs). We carried out household surveys, designed to obtain information for indicators and sub-indicators, and calculated the IAC. Moreover, we performed a sensitivity analysis to check for robustness of the results. Our findings show that, despite being located between two MPAs, the fishing community of Bazán in the Colombian Pacific is highly vulnerable and that the socioeconomic dimension of the IAC constitutes the most binding dimension for building adaptive capacity. Bazán is characterized by extreme poverty, high dependence on resources, and lack of basic public infrastructure. Notwithstanding, social capital and local awareness about ecological conditions may act as enhancers of adaptive capacity. The establishment of MPAs should consider the development of strategies to confer adaptive capacity to local communities highly dependent on resource extraction. 相似文献
5.
Robert Axelsson Per Angelstam Lennart Myhrman Stefan Sädbom Milis Ivarsson Marine Elbakidze Kenneth Andersson Petr Cupa Christian Diry Frederic Doyon Marcus K. Drotz Arne Hjorth Jan Olof Hermansson Thomas Kullberg F. Henry Lickers Johanna McTaggart Anders Olsson Yurij Pautov Lennart Svensson Johan Törnblom 《Ambio》2013,42(2):241-253
To implement policies about sustainable landscapes and rural development necessitates social learning about states and trends of sustainability indicators, norms that define sustainability, and adaptive multi-level governance. We evaluate the extent to which social learning at multiple governance levels for sustainable landscapes occur in 18 local development initiatives in the network of Sustainable Bergslagen in Sweden. We mapped activities over time, and interviewed key actors in the network about social learning. While activities resulted in exchange of experiences and some local solutions, a major challenge was to secure systematic social learning and make new knowledge explicit at multiple levels. None of the development initiatives used a systematic approach to secure social learning, and sustainability assessments were not made systematically. We discuss how social learning can be improved, and how a learning network of development initiatives could be realized. 相似文献
6.
The Growing Need for Sustainable Ecological Management of Marine Communities of the Persian Gulf 总被引:1,自引:0,他引:1
Sale PF Feary DA Burt JA Bauman AG Cavalcante GH Drouillard KG Kjerfve B Marquis E Trick CG Usseglio P Van Lavieren H 《Ambio》2011,40(1):4-17
The Persian Gulf is a semi-enclosed marine system surrounded by eight countries, many of which are experiencing substantial development. It is also a major center for the oil industry. The increasing array of anthropogenic disturbances may have substantial negative impacts on marine ecosystems, but this has received little attention until recently. We review the available literature on the Gulfs marine environment and detail our recent experience in the United Arab Emirates (U.A.E.) to evaluate the role of anthropogenic disturbance in this marine ecosystem. Extensive coastal development may now be the single most important anthropogenic stressor. We offer suggestions for how to build awareness of environmental risks of current practices, enhance regional capacity for coastal management, and build cooperative management of this important, shared marine system. An excellent opportunity exists for one or more of the bordering countries to initiate a bold and effective, long-term, international collaboration in environmental management for the Gulf. 相似文献
7.
Per Angelstam Kjell Andersson Maths Isacson Dmitri V. Gavrilov Robert Axelsson Mattias Bäckström Erik Degerman Marine Elbakidze Elena Yu. Kazakova-Apkarimova Lotta Sartz Stefan Sädbom Johan Törnblom 《Ambio》2013,42(2):146-159
Barriers and bridges to implement policies about sustainable development and sustainability commonly depend on the past development of social–ecological systems. Production of metals required integration of use of ore, streams for energy, and wood for bioenergy and construction, as well as of multiple societal actors. Focusing on the Swedish Bergslagen region as a case study we (1) describe the phases of natural resource use triggered by metallurgy, (2) the location and spatial extent of 22 definitions of Bergslagen divided into four zones as a proxy of cumulative pressure on landscapes, and (3) analyze the consequences for natural capital and society. We found clear gradients in industrial activity, stream alteration, and amount of natural forest from the core to the periphery of Bergslagen. Additionally, the legacy of top-down governance is linked to today’s poorly diversified business sector and thus municipal vulnerability. Comparing the Bergslagen case study with other similar regions in Russia and Germany, we discuss the usefulness of multiple case studies. 相似文献