Assessing the cumulative environmental effects of marine renewable energy developments: establishing common ground

Assessing and managing the cumulative impacts of human activities on the environment remains a major challenge to sustainable development. This challenge is highlighted by the worldwide expansion of marine renewable energy developments (MREDs) in areas already subject to multiple activities and climate change. Cumulative effects assessments in theory provide decision makers with adequate information about how the environment will respond to the incremental effects of licensed activities and are a legal requirement in many nations. In practise, however, such assessments are beset by uncertainties resulting in substantial delays during the licensing process that reduce MRED investor confidence and limit progress towards meeting climate change targets. In light of these targets and ambitions to manage the marine environment sustainably, reducing the uncertainty surrounding MRED effects and cumulative effects assessment are timely and vital. This review investigates the origins and evolution of cumulative effects assessment to identify why the multitude of approaches and pertinent research have emerged, and discusses key considerations and challenges relevant to assessing the cumulative effects of MREDs and other activities on ecosystems. The review recommends a shift away from the current reliance on disparate environmental impact assessments and limited strategic environmental assessments, and a move towards establishing a common system of coordinated data and research relative to ecologically meaningful areas, focussed on the needs of decision makers tasked with protecting and conserving marine ecosystems and services

Developing a novel approach to assess the cumulative effects of human activities to support contemporary marine management and planning.

The challenges of assessing and managing the cumulative impacts of human activities on the environment remain major obstacles to sustainable development. This challenge is highlighted by the worldwide expansion of marine renewable energy developments (MREDs) in areas already subject to multiple activities and where climate change is rapidly changing the environment. Cumulative effects assessments (CEAs) in theory provide decision makers with adequate information about how the environment will respond to the incremental effects of licensed activities and are a legal requirement in many nations. In practise, however, such assessments are beset by uncertainties that, in context of MREDs, resulting in substantial delays during the licensing process that limit progress towards meeting carbon emission reduction targets. At a broader level, poor CEA practice risks developments and activities being permitted that contribute to environmental degradation with negative implications for connected human societies. This thesis investigates the origins of CEA to understand why improved practice remains challenging and to identify key CEA considerations that need to be addressed to improve CEA. Shortcomings in current practice were evaluated to refine the key CEA considerations. A conceptual analysis of the underpinnings of CEA was completed that resulted in a tiered conception of CEA being proposed to support regional coherence between CEAs, and the elaboration of principles and a CEA pathway to support consistent CEA practice. The CEA pathway was tested by defining and collating evidence to populate the steps of the pathway, which was then applied to a case-study to investigate the potential for novel approaches to support improved CEA. Insights and directions for future research were discussed to contribute to the evidence base required to improve CEA and to advocate for a change in CEA, from being a sub-discipline of project- and plan- level assessments, to becoming the overarching purpose of such assessments.PhD in Environment and Agrifoo

Obligations and aspirations: A critical evaluation of offshore wind farm cumulative impact assessments

Proponents of marine renewable energy worldwide highlight that regulatory and consenting procedures are a significant barrier to the upscaling of infrastructure required to transform the energy generation sector. Uncertainties about the cumulative effects of marine renewable energy developments cause substantial delays during the consenting process, which are exacerbated by the lack of clarity about how to assess cumulative effects. These obstacles have contributed to perceptions that this essential emerging industry receives disproportionate scrutiny relative to established maritime activities. However, alongside legislated targets to reduce carbon emissions, there are legal obligations to protect, maintain and improve the condition of the marine environment. As the imperative to halt the decline in the condition of the environment increases, so expectations of cumulative impact assessments grow and the risk of consenting delays persists. To investigate how robust current cumulative impact assessment practise is, a novel evaluation framework was developed and applied to Environmental Statements of the world's largest offshore wind farms, currently in United Kingdom waters. The framework was designed to evaluate cumulative impact assessments relative to the information needs of decision-makers tasked with managing cumulative effects. We found that current practise does not meet those needs, that there is dissonance between science and practise, and problematic variability between assessments was observed. Straightforward recommendations for improved practise are provided, which if implemented may ease the perceived regulatory burden by clarifying practise. We also highlight additional steps that could enable project-led cumulative impact assessments to better support regional marine management. The results and recommendations will be of interest to countries worldwide where marine renewable energy is emerging alongside ecosystem-approach and marine spatial planning aspirations

Structuring cumulative effects assessments to support regional and local marine management and planning obligations

Cumulative effects assessments are a legal requirement in many jurisdictions and are key to informing marine policy. However, practice does not yet deliver fit-for-purpose assessments relative to sustainable development and environmental protection obligations. The complexity of cumulative effect questions, which are embedded in complex social-ecological systems, makes multiple, methodologically diverse assessments a necessity. Using the expansion of marine renewable energy developments in European Union waters as a case study, this paper explores how social-ecological systems thinking and cumulative effects assessment theory can combine to structure CEAs that better support the management and regulation of maritime activities at regional scales. A general perspective for cumulative effects assessment is proposed to remove ambiguity of intent and to orient assessments towards a common objective. Candidate principles for practice are presented for consideration. These principles are integrated into a stepped assessment approach that seeks to improve cumulative effects assessments of localised activities relative to the information needs of decision-makers implementing the ecosystem approach

Attribute table, evaluation data & analysis of evaluation data for published paper "Obligations and aspirations: a critical evaluation of offshore wind farm cumulative impact assessments"

Files uploaded enable: <div><br><div>1) application of the critical evaluation framework developed to other fields; </div><div><br></div><div>2) re-examination of the data generated by the evaluation. <br><div><br></div><div>The full methodology is reported in the published paper. Information identifying individual Environmental Statements has been removed from publicly available data. </div></div></div

Advances in cumulative effects assessment and application in marine and coastal management

Quantifying and managing the cumulative effects of human activities on coastal and marine environments is among the foremost challenges in enabling sustainable development in the twenty-first century. As the speed with which these environments are changing increases, there is greater impetus to resolve the evident problems facing governance systems responsible for managing cumulative impacts. Policymakers and regulators recognise the need to assess and manage cumulative effects, as evidenced by widespread legislation requiring cumulative effects assessment (CEA). Yet there is ample evidence that we are not turning the tide in terms of balancing good environmental health with increasing demands of already degraded coastal and marine spaces that are increasingly impacted by climate change. This paper reviews the current state of knowledge regarding scientific and practical advances in CEA, assesses whether these advances are being applied in decision-making and identifies where challenges to implementation exist. Priority research questions are formulated to accelerate the inclusion of effective CEA in marine and coastal planning and management