Knowledge Base

The Knowledge Base provides access to information about the environmental effects of marine and wind energy, supporting OES-Environmental and WREN initiatives. Relevant documents and OES-Environmental metadata forms are compiled into a user-friendly table with advanced filtering. Filters may be selected on the right, or keywords entered in the Search Text box. Content may also be sorted alphabetically by clicking on column headers.


As an alternative to the Knowledge Base, check out the Map Viewer to access geotagged content in a spatial view.


Title Author* Date** Type of Content Technology Types Stressorssort descending Receptors
Three-dimensional mapping of the benthic invertebrates biophony with a compact four-hydrophones array Gervaise, C., et al. May 2019 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Attraction Invertebrates
Functional and structural responses to marine urbanisation Mayer-Pinto, M., et al. January 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Attraction, Avoidance Invertebrates
Environmental Risk Evaluation System - An Approach to Ranking Risk of Ocean Energy Development on Coastal and Estuarine Environments Copping, A., et al. January 2015 Journal Article Marine Energy (General), Tidal, Wave, Wind Energy (General), Offshore Wind Attraction, Avoidance, Changes in Flow, Chemicals, Collision, Displacement, Habitat Change Birds, Fish, Marine Mammals
Oceanographic and biological influences on recruitment of benthic invertebrates to hard substrata on the Oregon shelf Meyer, K., Li, Y., Young, C. August 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Attraction, Habitat Change Invertebrates
Anthropogenic disturbance facilitates a non-native species on offshore oil platforms Viola, S., et al. July 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Attraction, Habitat Change Invertebrates
Colonization of an Artificial Hard Substrate by Mytilus edulis in the German Bight Joschko, T., et al. October 2008 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Attraction, Habitat Change Invertebrates
Connectivity of larval stages of sedentary marine communities between hard substrates and offshore structures in the North Sea van der Molen, J., et al. October 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Attraction, Habitat Change Ecosystem Processes
Impact of pile-driving on Hector's dolphin in Lyttelton Harbour, New Zealand Leunissen, E., Rayment, W., Dawson, S. May 2019 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Avoidance, Noise Marine Mammals, Cetaceans
Responses of bottlenose dolphins and harbor porpoises to impact and vibration piling noise during harbor construction Graham, I., et al. May 2017 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Avoidance, Noise Marine Mammals, Cetaceans
Physical and Numerical Large-Scale Wave Basin Modeling of Fluid-Structure Interaction and Wave Impact Phenomena Yim, S., et al. June 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Changes in Flow N/A
Effects of Man-Made Structures on Sedimentary Oxygenation: Extent, Seasonality and Implications for Offshore Renewables Wilding, T. June 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Changes in Flow Physical Environment
Evaluation of the nearshore impact of a hybrid wave-wind energy farm Diaconu, S., Onea, F., Rusu, E. February 2013 Journal Article Marine Energy (General), Wave, Wind Energy (General), Offshore Wind Changes in Flow Physical Environment
The Expected Shoreline Effect of a Marine Energy Farm Operating Close to Sardinia Island Onea, F., Rusu, E. November 2019 Journal Article Marine Energy (General), Wave, Wind Energy (General), Offshore Wind Changes in Flow Physical Environment
The expected efficiency and coastal impact of a hybrid energy farm operating in the Portuguese nearshore Onea, F., Rusu, E. February 2016 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Changes in Flow Physical Environment
Short-Term Disturbance by a Commercial Two-Dimensional Seismic Survey does Not Lead to Long-Term Displacement of Harbour Porpoises Thompson, P., et al. November 2013 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Displacement, Noise Marine Mammals, Cetaceans
Effect of low frequency electromagnetic field on the behavior and bioenergetics of the polychaete Hediste diversicolor Jakubowska, M., et al. September 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind EMF Invertebrates
Assessment of Entanglement Risk to Marine Megafauna due to Offshore Renewable Energy Mooring Systems Harnois, V., et al. September 2015 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Entrapment Marine Mammals
Ecological best practice in decommissioning: a review of scientific research Fortune, I., Paterson, D. September 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Ecosystem Processes, Human Dimensions, Legal & Policy
Fish densities associated with structural elements of oil and gas platforms in southern California Meyer-Gutbrod, E., et al. October 2019 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Fish
Creation of microhabitats (tidepools) in ripraps with climax communities as a way to mitigate negative effects of artificial substrate on marine biodiversity Ostale-Valriberas, E., et al. September 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Invertebrates
Ocean sprawl facilitates dispersal and connectivity of protected species Henry, L., et al. August 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Invertebrates
Contributions of marine infrastructures to marine planning and protected area networking Shabtay, A., Portman, M., Carmel, Y. June 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Ecosystem Processes, Human Dimensions, Marine Spatial Planning
Corridors for aliens but not for natives: effects of marine urban sprawl at a regional scale Airoldi, L., et al. July 2015 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Invertebrates
Marine Mammals Trace Anthropogenic Structures at Sea Russell, D., et al. July 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Ecosystem Processes, Marine Mammals, Pinnipeds
Individual Consistency in the Foraging Behaviour of Northern Gannets: Implications for Interactions with Offshore Renewable Energy Developments Soanes, L., et al. March 2013 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Birds, Seabirds
Epibenthic Colonization of Concrete and Steel Pilings in a Cold-Temperate Embayment: A Weld Experiment Andersson, M., et al. March 2009 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind Habitat Change Fish, Invertebrates
Design and Implementation of a Marine Animal Alert System to Support Marine Renewable Energy Deng, Z., et al. July 2013 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Marine Mammals, Cetaceans
Tethys: Developing a Commons for Understanding Environmental Effects of Marine Renewable Energy Copping, A., et al. December 2013 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
Evaluating the Statistical Power of Detecting Changes in the Abundance of Seabirds at Sea Maclean, I., et al. January 2013 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Birds
Marine Renewable Energies: Perspectives and Implications for Marine Ecosystems Azzellino, A., et al. June 2013 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Ecosystem
Renewable Energy from the Ocean Pelc, R., Fujita, R. November 2002 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
The Lessons Learned from the Development of the Wind Energy Industry that Might be Applied to Marine Industry Renewables Garrad, A. January 2012 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics
The Potential for Cooperative Management of Elasmobranchs and Offshore Renewable Energy Development in UK Waters Gill, A., Kimber, J. October 2005 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Fish
Towards Best Environmental Practice for Cetacean Conservation in Developing Scotland's Marine Renewable Energy Dolman, S., Simmonds, M. September 2010 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Marine Mammals, Cetaceans
Encouraging Renewable Energy in the Offshore Environment Appiott, J., Dhanju, A., Cicin-Sain, B. March 2014 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
The Effects of Landscape Modifications on the Long-Term Persistence of Animal Populations Nabe-Nielsen, J., et al. January 2010 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Nearfield Habitat
Offshore Marine Renewable Energy Devices as Stepping Stones Across Biogeographical Boundaries Adams, T., et al. January 2014 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Benthic Invertebrates, Ecosystem
Applicability of the "Frame of Reference" Approach for Environmental Monitoring of Offshore Renewable Energy Projects Garel, E., et al. August 2014 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
Symbiotic Offshore Energy Harvesting and Storage Systems Slocum, A. September 2015 Journal Article Marine Energy general, Wave, Wind Energy general, Offshore Wind N/A Birds
The Main Characteristics, Problems, and Prospects for Western European Coastal Seas Dauvin, J. February 2008 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Ecosystem
Technologies and their Influence on Future UK Marine Resource Development and Management Side, J., Jowitt, P. July 2002 Journal Article Marine Energy general, Wave, Wind Energy general, Offshore Wind N/A Socio-economics
The Development and Use of Individuals-Based Models to Predict the Effects of Habitat Loss and Disturbance on Waders and Waterfowl West, A., Caldow, R. March 2006 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Birds, Shorebirds, Waterfowl, Nearfield Habitat
Marine governance in an industrialised ocean: A case study of the emerging marine renewable energy industry Wright, G. February 2015 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Legal and Policy
Overview of ocean power technology Wilberforce, T., et al. May 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
Assessing use-use interactions at sea: A theoretical framework for spatial decision support tools facilitating co-location in maritime spatial planning Bonnevie, I., Hansen, H., Schrøder, L. August 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Marine Spatial Planning
International good practices for facilitating transboundary collaboration in Marine Spatial Planning Kull, M., et al. January 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Marine Spatial Planning
The mechanics of blue growth: Management of oceanic natural resource use with multiple, interacting sectors Klinger, D., et al. January 2018 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Legal and Policy, Marine Spatial Planning
Benthos distribution modelling and its relevance for marine ecosystem management Reiss, H., et al. February 2015 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Benthic Invertebrates
Integrated Environmental Mapping and Monitoring, a Methodological Approach to Optimise Knowledge Gathering and Sampling Strategy Nilssen, I., et al. July 2015 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
Vitamine ENA: A framework for the development of ecosystem-based indicators for decision makers Safi, G., et al. May 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Ecosystem, Socio-economics, Environmental Impact Assessment
Developing offshore wind farm siting criteria by using an international Delphi method Ho, L., et al. February 2018 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Marine Spatial Planning
A Methodology for Multi-Criteria Design of Multi-Use Offshore Platforms for Marine Renewable Energy Harvesting Zanuttigh, B., et al. January 2016 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics
Challenges in Implementing Sustainable Marine Spatial Planning: The New Portuguese Legal Framework Case Santos, C., et al. November 2015 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Legal and Policy, Marine Spatial Planning
Combining Wave Energy with Wind and Solar: Short-Term Forecasting Reikard, G., Robertson, B., Bidlot, J. September 2015 Journal Article Marine Energy general, Wave, Wind Energy general, Offshore Wind N/A N/A
Practical Approaches and Advances in Spatial Tools to Achieve Multi-Objective Marine Spatial Planning Lombard, A., et al. April 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Marine Spatial Planning
From identification of compatibilities and conflicts to reaching marine spatial allocation agreements. Review of actions required and relevant tools and processes Kyriazi, Z. December 2018 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Marine Spatial Planning
Community benefits from offshore renewables: The relationship between different understandings of impact, community, and benefit Rudolph, D., Haggett, C., Aitken, M. March 2017 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Legal and Policy, Stakeholder Engagement
Effects of Pile Driving on the Residency and Movement of Tagged Reef Fish Iafrate, J., et al. November 2016 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Fish
Buried Alive: The Behavioural Response of the Mussels, Modiolus modiolus and Mytilus edulis to Sudden Burial by Sediment Hutchison, Z., et al. March 2016 Journal Article Marine Energy general, Tidal, Wave, Wind Energy general, Offshore Wind N/A Invertebrates
Marine Renewable Energy: Potential Benefits to Biodiversity? An Urgent Call for Research Inger, R., et al. December 2009 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Ecosystem
Improving visual biodiversity assessments of motile fauna in turbid aquatic environments Jones, R., et al. August 2019 Journal Article Marine Energy general, Tidal, Wave, Wind Energy general, Offshore Wind N/A Fish, Invertebrates, Marine Mammals
Oil and gas infrastructure decommissioning in marine protected areas: System complexity, analysis and challenges Burdon, D., et al. October 2018 Journal Article Marine Energy general, Tidal, Wave, Wind Energy general, Offshore Wind N/A N/A
Tracking seabirds to identify ecologically important and high risk marine areas in the western North Atlantic Montevecchi, W., et al. November 2012 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Birds, Seabirds
Identifying ecologically important marine areas for seabirds using behavioural information in combination with distribution patterns Camphuysen, K., et al. November 2012 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Birds, Seabirds
A strategic analysis of tidal current energy conversion systems in the European Union Segura, E., Morales, R., Somolinos, J. February 2018 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
Assessing the cumulative exposure of wildlife to offshore wind energy development Wing Goodale, M., Milman, A. April 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A N/A
Combined Exploitation of Offshore Wind and Wave Energy in the Italian Seas: A Spatial Planning Approach Azzellino, A., et al. April 2019 Journal Article Marine Energy general, Wave, Wind Energy general, Offshore Wind N/A Socio-economics, Marine Spatial Planning
Building the Blue Economy: The Role of Marine Spatial Planning in Facilitating Offshore Renewable Energy Development Young, M. February 2015 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Marine Spatial Planning
Social licence in the marine sector: A review of understanding and application Kelly, R., Pecl, G., Fleming, A. July 2017 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-economics, Stakeholder Engagement
Reconversion of offshore oil and gas platforms into renewable energy sites production: Assessment of different scenarios Leporini, M., et al. December 2018 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Life Cycle Assessment
Co-location opportunities for renewable energies and aquaculture facilities in the Canary Archipelago Weiss, C., et al. December 2018 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Human Dimensions, Fishing, Marine Spatial Planning
Improving policies and regulations for environmental-friendly ocean renewable energy development in Korea Park, J., Kim, T. August 2014 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-Economics, Legal and Policy
External Effects of Renewable Energy Projects: Life Cycle Analysis-based Approach Salnikova, A., et al. May 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Socio-Economics, Life Cycle Assessment
Feeding home ranges of pacific coast feeding group gray whales Lagerquist, B., et al. February 2019 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Marine Mammals, Cetaceans
Site Selection of Hybrid Offshore Wind and Wave Energy Systems in Greece Incorporating Environmental Impact Assessment Loukogeorgaki, E., Vagiona, D., Vasileiou, M. August 2018 Journal Article Marine Energy general, Wave, Wind Energy general, Offshore Wind N/A N/A
Lessons learned in marine governance: Case studies of marine spatial planning practice in the U.S. Smythe, T., McCann, J. August 2018 Journal Article Marine Energy general, Wind Energy general, Offshore Wind N/A Human Dimensions, Legal and Policy, Marine Spatial Planning, Stakeholder Engagement
Imbalances in interaction for transboundary marine spatial planning: Insights from the Baltic Sea Region Janßen, H., et al. July 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Marine Spatial Planning
Camera technology for monitoring marine biodiversity and human impact Bicknell, A., et al. October 2016 Journal Article Marine Energy (General), Tidal, Wave, Wind Energy (General), Offshore Wind N/A Fish, Invertebrates, Human Dimensions
Marine Renewable Energy Seascape Borthwick, A. March 2016 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A N/A
Mapping Fisheries for Marine Spatial Planning: Gear-Specific Vessel Monitoring System (VMS), Marine Conservation and Offshore Renewable Energy Campbell, M., et al. March 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Fish, Human Dimensions, Fisheries
Modelling the Biological Significance of Behavioural Change in Coastal Bottlenose Dolphins in Response to Disturbance New, L., et al. April 2013 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Marine Mammals, Cetaceans
Establishing an Agenda for Social Studies Research in Marine Renewable Energy Kerr, S., et al. April 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Social & Economic Data
Marine Renewable Energy and Scottish West Coast Fishers: Exploring Impacts, Opportunities and Potential Mitigation Alexander, K., Potts, T., Wilding, T. April 2013 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Fisheries, Social & Economic Data
Special Issue: Renewable Ocean Energy Development and the Environment Zydlewski, G., Copping, A., Redden, A. January 2015 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Ecosystem Processes
Investigating the Co-Existence of Fisheries and Offshore Renewable Energy in the UK: Identification of a Mitigation Agenda for Fishing Effort Displacement de Groot, J., et al. December 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Fisheries
Great Skua (Stercorarius skua) Movements at Sea in Relation to Marine Renewable Energy Developments Wade, H., et al. October 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Birds, Seabirds
The interplay between economics, legislative power and social influence examined through a social-ecological framework for marine ecosystems services Martino, S., Tett, P., Kenter, J. February 2019 Journal Article Marine Energy (General), Tidal, Wave, Wind Energy (General), Offshore Wind N/A Human Dimensions, Social & Economic Data
Do tidal stream energy projects offer more value than offshore wind farms? A case study in the United Kingdom Lamy, J., Azevedo, I. February 2018 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Social & Economic Data
Integration of wave energy and other marine renewable energy sources with the needs of coastal societies Manasseh, R., et al. January 2017 Journal Article Marine Energy (General), Ocean Current, OTEC, Tidal, Wave, Wind Energy (General), Offshore Wind N/A Human Dimensions, Social & Economic Data
Attitudes and Perceptions of Fishermen on the Island of Ireland Towards the Development of Marine Renewable Energy Projects Reilly, K., O'Hagan, A., Dalton, G. August 2015 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Social & Economic Data
Ocean Zoning for Conservation, Fisheries and Marine Renewable Energy: Assessing Trade-Offs and Co-Location Opportunities Yates, K., Schoeman, D., Klein, C. April 2015 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Fisheries, Marine Spatial Planning
Rights and Ownership in Sea Country: Implications of Marine Renewable Energy for Indigenous and Local Communities Kerr, S., et al. February 2015 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Social & Economic Data
A Marine Spatial Planning Framework for the Optimal Siting of Marine Renewable Energy Installations: Two Danish Case Studies Azzellino, A., et al. January 2013 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Marine Spatial Planning
A review of unmanned vehicles for the detection and monitoring of marine fauna Verfuss, U., et al. March 2019 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Environmental Impact Assessment
Environmental and Ecological Effects of Ocean Renewable Energy Development: A Current Synthesis Boehlert, G., Gill, A. June 2010 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A N/A
The New Mode of Marine Planning in the UK: Aspirations and Challenges Scarff, G., Fitzsimmons, C., Gray, T. January 2015 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Legal & Policy
Strengthening the Role of Science in Marine Governance through Environmental Impact Assessment: A Case Study of the Marine Renewable Energy Industry Wright, G. October 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Environmental Impact Assessment
Coordination and Cooperation in the European Marine Strategy Framework Directive and the US National Ocean Policy Maier, N. May 2014 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Legal & Policy
Attitudes of Scottish Fishers Towards Marine Renewable Energy Alexander, K., Wilding, T., Jacomina Heymans, J. January 2013 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Social & Economic Data
Evaluation of the near future wave energy resources in the Black Sea under two climate scenarios Rusu, L. November 2019 Journal Article Marine Energy (General), Wind Energy (General), Offshore Wind N/A Human Dimensions, Climate Change

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