Skip to main content
U.S. flag

An official website of the United States government

Influence of offshore oil and gas structures on seascape ecological connectivity

March 16, 2022

Offshore platforms, subsea pipelines, wells and related fixed structures supporting the oil and gas (O&G) industry are prevalent in oceans across the globe, with many approaching the end of their operational life and requiring decommissioning. Although structures can possess high ecological diversity and productivity, information on how they interact with broader ecological processes remains unclear. Here, we review the current state of knowledge on the role of O&G infrastructure in maintaining, altering or enhancing ecological connectivity with natural marine habitats. There is a paucity of studies on the subject with only 33 papers specifically targeting connectivity and O&G structures, although other studies provide important related information. Evidence for O&G structures facilitating vertical and horizontal seascape connectivity exists for larvae and mobile adult invertebrates, fish and megafauna; including threatened and commercially important species. The degree to which these structures represent a beneficial or detrimental net impact remains unclear, is complex and ultimately needs more research to determine the extent to which natural connectivity networks are conserved, enhanced or disrupted. We discuss the potential impacts of different decommissioning approaches on seascape connectivity and identify, through expert elicitation, critical knowledge gaps that, if addressed, may further inform decision making for the life cycle of O&G infrastructure, with relevance for other industries (e.g. renewables). The most highly ranked critical knowledge gap was a need to understand how O&G structures modify and influence the movement patterns of mobile species and dispersal stages of sessile marine species. Understanding how different decommissioning options affect species survival and movement was also highly ranked, as was understanding the extent to which O&G structures contribute to extending species distributions by providing rest stops, foraging habitat, and stepping stones. These questions could be addressed with further dedicated studies of animal movement in relation to structures using telemetry, molecular techniques and movement models. Our review and these priority questions provide a roadmap for advancing research needed to support evidence-based decision making for decommissioning O&G infrastructure.

Publication Year 2022
Title Influence of offshore oil and gas structures on seascape ecological connectivity
DOI 10.1111/gcb.16134
Authors Dianne L McLean, Luciana C. Ferreira, Jessica A Benthuysen, Karen J. Miller, Marie-Lise Schlappy, Matthew J. Ajemian, Oliver Berry, Silvana N. R. Birchenough, Todd Bond, Fabio Boschetti, Ann S Bull, Jeremy T Claisse, Scott A Condie, Pierpaolo Consoli, Joop W. P. Coolen, Michael Elliott, Irene S Fortune, Ashley M Fowler, Bronwyn M Gillanders, Hugo B Harrison, Kristen Hart, Lea-Anne Henry, Chad L Hewitt, Natalie Hicks, Karlo Hock, Kieran Hyder, Milton S. Love, Peter I Macreadie, Robert J. Miller, William A Montevecchi, Mary M Nishimoto, Henry M. Page, David M Paterson, Charitha B Pattiaratchi, Gretta T Pecl, Joanne S Porter, David B. Reeves, Cynthia Riginos, Sally Rouse, Debbie J. F. Russell, Craig D. H. Sherman, Jonas Teilmann, Victoria L. G. Todd, Eric A. Treml, David H. Williamson, Michele Thums
Publication Type Article
Publication Subtype Journal Article
Series Title Global Change Biology
Index ID 70231194
Record Source USGS Publications Warehouse
USGS Organization Wetland and Aquatic Research Center