Can we manage ecosystems in a sustainable way?

Fisheries have often become unsustainable, despite efforts of policy, management, and science. FAO) has reviewed this undesirable pattern and identified six major factors contributing to unsustainability: inappropriate incentives, high demand for limited resources, poverty and lack of alternatives, complexity and lack of knowledge, lack of effective governance, and interactions of Fisheries sector with other sectors and the environment. It also identified eight classes of actions that provide pathways to addressing the factors causing unsustainability of fisheries; allocation of rights; transparent, participatory management; Support for science, enforcement and planning. equitable distribution of benefits; integrated policy development; application of precaution; building capacity and public understanding, and market incentives and economic instruments. The review highlighted that "sustainability" is a multi-dimensional concept (economic, social, ecological, and institutional), and measures implemented to address problems on one dimension of sustainability will move the fishery in a negative direction ill at least one other dimension. In this paper I apply the FAO framework to the whole ecosystem. For each factor of unsustainability, I consider whether redefining the sustainability problem to the greater ecosystem makes the factor more or less serious as a threat to sustainability. For each pathway to improvement I consider whether the redefinition of the problem makes the pathway more or less effective as a management response to the threat. Few of the factors Of Unsustainability becomes easier to address at the ecosystem scale, and several of them become much more difficult. Of the combinations of pathways of responses and factors of unsustainability., more than two thirds of them become more difficult to apply, and/or have even greater negative impacts on other dimensions of sustainability. Importantly, the most promising pathways for addressing unsustainability of fisheries alone become particularly hard to apply when addressing unsustainability at the ecosystem scale. The ecosystem approach may be a necessary step to take, because the problem of Sustainable use of fish stocks may not be solvable at the scale it has been defined historically. However these results imply that moving to an ecosystem scale of considerations is going to make the search for sustainability even more difficult. Moreover there is still no guarantee that a solution can be found - at least not any solution without major reductions in social and economic expectations. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.