| 1. |
- Crona, Beatrice I., et al.
(författare)
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Masked, diluted and drowned out : how global seafood trade weakens signals from marine ecosystems
- 2016
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Ingår i: Fish and Fisheries. - : Wiley. - 1467-2960 .- 1467-2979. ; 17:4, s. 1175-1182
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Tidskriftsartikel (refereegranskat)abstract
- Nearly 40% of seafood is traded internationally and an even bigger proportion is affected by international trade, yet scholarship on marine fisheries has focused on global trends in stocks and catches, or on dynamics of individual fisheries, with limited attention to the link between individual fisheries, global trade and distant consumers. This paper examines the usefulness of fish price as a feedback signal to consumers about the state of fisheries and marine ecosystems. We suggest that the current nature of fisheries systems and global markets prevent transmission of such price signals from source fisheries to consumers. We propose several mechanisms that combine to weaken price signals, and present one example - the North Sea cod - to show how these mechanisms can be tested. The lack of a reliable price feedback to consumers represents a challenge for sustainable fisheries governance. We therefore propose three complimentary approaches to address the missing feedback: (i) strengthening information flow through improved traceability and visibility of individual fishers to consumers, (ii) capitalizing on the changing seafood trade structures and (iii) bypassing and complementing market mechanisms by directly targeting citizens and political actors regarding marine environmental issues through publicity and information campaigns. These strategies each havelimitations and thus need to be pursued together to address the challenge of sustainability in global marine fisheries.
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| 2. |
- Crona, Beatrice, et al.
(författare)
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Middlemen, a critical social-ecological link in coastal communities of Kenya and Zanzibar
- 2010
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Ingår i: Marine Policy. - : Elsevier BV. - 0308-597X .- 1872-9460. ; 34:4, s. 761-771
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Tidskriftsartikel (refereegranskat)abstract
- This paper analyzes the middlemen-fishermen link in coastal communities along the coast of southern Kenya and Zanzibar, and explores effects of reciprocal agreements and credit arrangements on social-ecological feedbacks of coastal systems The existence and generality of such arrangements are mapped and their effect on resource use and ecosystem dynamics is then explored Data show that credit arrangements are widespread and that fishermen are bound by reciprocal agreements and financial guarantees during periods of lower catches that provide short-term stabilizing social effects These arrangements create incentives which disconnect resource extraction from ecosystem dynamics and impede development of sustainable use practices The role of middlemen is seldom accounted for in fisheries governance Scenarios for the development of small-scale fisheries in the region are outlined and the function of middlemen is discussed considering the influence of external drivers Policies that incorporate middlemen are recommended to improve the governance of fish stocks and coastal ecosystems in East Africa.
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| 3. |
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| 4. |
- Folke, Carl, et al.
(författare)
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Transnational corporations and the challenge of biosphere stewardship
- 2019
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Ingår i: Nature Ecology & Evolution. - : Springer Science and Business Media LLC. - 2397-334X. ; 3:10, s. 1396-1403
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Tidskriftsartikel (refereegranskat)abstract
- Sustainability within planetary boundaries requires concerted action by individuals, governments, civil society and private actors. For the private sector, there is concern that the power exercised by transnational corporations generates, and is even central to, global environmental change. Here, we ask under which conditions transnational corporations could either hinder or promote a global shift towards sustainability. We show that a handful of transnational corporations have become a major force shaping the global intertwined system of people and planet. Transnational corporations in agriculture, forestry, seafood, cement, minerals and fossil energy cause environmental impacts and possess the ability to influence critical functions of the biosphere. We review evidence of current practices and identify six observed features of change towards 'corporate biosphere stewardship', with significant potential for upscaling. Actions by transnational corporations, if combined with effective public policies and improved governmental regulations, could substantially accelerate sustainability efforts.
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| 5. |
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| 6. |
- Keys, Patrick W., et al.
(författare)
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Anthropocene risk
- 2019
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Ingår i: Nature Sustainability. - : Springer Science and Business Media LLC. - 2398-9629. ; 2:8, s. 667-673
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Tidskriftsartikel (refereegranskat)abstract
- The potential consequences of cross-scale systemic environmental risks with global effects are increasing. We argue that current descriptions of globally connected systemic risk poorly capture the role of human-environment interactions. This creates a bias towards solutions that ignore the new realities of the Anthropocene. We develop an integrated concept of what we denote Anthropocene risk-that is, risks that: emerge from human-driven processes; interact with global social-ecological connectivity; and exhibit complex, cross-scale relationships. To illustrate this, we use four cases: moisture recycling teleconnections, aquaculture and stranded assets, biome migration in the Sahel, and sea-level rise and megacities. We discuss the implications of Anthropocene risk across several research frontiers, particularly in the context of supranational power, environmental and social externalities and possible future Anthropocene risk governance. We conclude that decision makers must navigate this new epoch with new tools, and that Anthropocene risk contributes conceptual guidance towards a more sustainable and just future.
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| 7. |
- Lokrantz, Jerker, et al.
(författare)
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Impacts of artisanal fishing on key functional groups and the potential vulnerability of coral reefs
- 2010
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Ingår i: Environmental Conservation. - Online. - 0376-8929 .- 1469-4387. ; 36:4, s. 327-337
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Tidskriftsartikel (refereegranskat)abstract
- Fishing can have major impacts on the structure of coral reef ecosystems. Overfishing of herbivores is particularly detrimental, as it makes the coral system more likely to undergo shifts to macroalgal dominance in the event of coral mass mortality. Knowing when important processes, such as herbivory, are becoming brittle is important because it can provide an opportunity for managers to avoid undesirable ecosystem-level changes. This study investigates the impact of artisanal fishing on three important functional groups of herbivores (grazers, scrapers and excavators) on five coral-dominated reefs outside Zanzibar (Tanzania). There was a negative correlation between fishing pressure and fish biomass, abundance, diversity and species richness. Moreover, fishing had a negative influence on the demographic structure of functional groups, particularly excavators, manifesting itself as a skewness towards smaller individuals within populations. Artisanal fishing can have significant impacts on key functional groups of herbivorous reef fishes which may increase the vulnerability of coral reefs to undesirable ecosystem shifts.
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| 8. |
- Norström, Albert V., et al.
(författare)
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Alternative states on coral reefs : beyond coral-macroalgal phase shifts
- 2009
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Ingår i: Marine Ecology Progress Series. - : Inter-Research Science Center. - 0171-8630 .- 1616-1599. ; 376, s. 295-306
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Tidskriftsartikel (refereegranskat)abstract
- Degradation of coral reefs is often associated with changes in community structure where macroalgae become the dominant benthic life form. These phase shifts can be difficult to reverse. The debate on coral reef phase shifts has not focused on reports of coral reefs becoming dominated by other life forms following disturbance. A review of the primary and grey literature indicates that reefs dominated by corallimorpharia, soft corals, sponges and sea urchins can enter an alternative state as a result of a phase shift. Shifts can be triggered by pulse disturbances that cause large-scale coral mortality, and may become stable as a result of positive feedback mechanisms. However, they may differ from the archetypical coral-macroalgae shift, depending on the factors driving the shift; whereas coral-macroalgae and coral-urchin shifts seem to be driven by loss of top-down control through overfishing, shifts to corallimorpharian, soft coral and sponge dominance seem more associated with changes in bottom-tip dynamics. Understanding the differences and similarities in mechanisms that cause and maintain this variety of alternative states will aid management aimed at preventing and reversing phase shifts of coral reefs.
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| 9. |
- Norström, Albert V., et al.
(författare)
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Guiding coral reef futures in the Anthropocene
- 2016
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Ingår i: Frontiers in Ecology and the Environment. - : Wiley. - 1540-9295 .- 1540-9309. ; 14:9, s. 490-498
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Forskningsöversikt (refereegranskat)abstract
- Anthropogenic changes to the Earth now rival those caused by the forces of nature and have shepherded us into a new planetary epoch - the Anthropocene. Such changes include profound and often unexpected alterations to coral reef ecosystems and the services they provide to human societies. Ensuring that reefs and their services endure during the Anthropocene will require that key drivers of coral reef change fishing, water quality, and anthropogenic climate change - stay within acceptable levels or safe operating spaces. The capacity to remain within these safe boundaries hinges on understanding the local, but also the increasingly global and cross-scale, socioeconomic causes of these human drivers of change. Consequently, local and regional management efforts that are successful in the short term may ultimately fail if current decision making and institution-building around coral reef systems remains fragmented, poorly coordinated, and unable to keep pace with the escalating speed of social, technological, and ecological change.
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| 10. |
- Nyström, Magnus, et al.
(författare)
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Anatomy and resilience of the global production ecosystem
- 2019
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 575, s. 98-108
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Tidskriftsartikel (refereegranskat)abstract
- Much of the Earth's biosphere has been appropriated for the production of harvestable biomass in the form of food, fuel and fibre. Here we show that the simplification and intensification of these systems and their growing connection to international markets has yielded a global production ecosystem that is homogenous, highly connected and characterized by weakened internal feedbacks. We argue that these features converge to yield high and predictable supplies of biomass in the short term, but create conditions for novel and pervasive risks to emerge and interact in the longer term. Steering the global production ecosystem towards a sustainable trajectory will require the redirection of finance, increased transparency and traceability in supply chains, and the participation of a multitude of players, including integrated 'keystone actors' such as multinational corporations.
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