Journal article Open Access

Potential impacts of offshore oil and gas activities on deep-sea sponges and the habitats they form

Vad, J; Kazanidis, G; Henry, L-A; Jones, D O B; Tendal, O S; Christiansen, T H; Roberts J M

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  <identifier identifierType="DOI">10.5281/zenodo.3239342</identifier>
      <creatorName>Vad, J</creatorName>
      <affiliation>University of Edinburgh</affiliation>
      <creatorName>Kazanidis, G</creatorName>
      <affiliation>University of Edinburgh</affiliation>
      <creatorName>Henry, L-A</creatorName>
      <affiliation>University of Edinburgh</affiliation>
      <creatorName>Jones, D O B</creatorName>
      <givenName>D O B</givenName>
      <affiliation>National Oceanography Centre, Southampton</affiliation>
      <creatorName>Tendal, O S</creatorName>
      <givenName>O S</givenName>
      <affiliation>Natural History Museum of Denmark</affiliation>
      <creatorName>Christiansen, T H</creatorName>
      <givenName>T H</givenName>
      <affiliation>Institute for Advanced Sustainability Studies e.V. (IASS), Potsdam, Germany</affiliation>
      <creatorName>Roberts J M</creatorName>
      <affiliation>University of Edinburgh</affiliation>
    <title>Potential impacts of offshore oil and gas activities on deep-sea sponges and the habitats they form</title>
    <date dateType="Issued">2019-06-05</date>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
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    <rights rightsURI="">Creative Commons Attribution 4.0 International</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
    <description descriptionType="Abstract">&lt;p&gt;Sponges form an important component of benthic ecosystems from shallow littoral to hadal&amp;nbsp;depths. In the deep ocean, beyond the continental shelf, sponges can form high- density&amp;nbsp; fields, constituting important habitats supporting rich benthic communities. Yet these habitats remain relatively unexplored. The oil and gas industry has played an important role in&amp;nbsp; advancing our knowledge of deep-sea environments. Since its inception in the 1960s,&amp;nbsp;offshore oil and gas industry has moved into deeper waters. However, the impacts of these&amp;nbsp;activities on deep-sea sponges and other ecosystems are only starting to become the subject of active research. Throughout the development, operation and closure of an oil or gas field&amp;nbsp; many activities take place, ranging from the seismic exploration of sub seafloor geological&amp;nbsp; features to the installation of infrastructure at the seabed to the drilling process itself. These&amp;nbsp;routine activities and accidental releases of hydrocarbons during spills can significantly&amp;nbsp;&lt;br&gt;
impact the local marine environment. Each phase of a field development or an accidental oil&amp;nbsp; spill will therefore have different impacts on sponges at community, individual and cellular&amp;nbsp; levels. Legacy issues regarding the future decommissioning of infrastructure and the abandonment of wells are also important environmental management considerations. This chapter reviews our understanding of impacts from hydrocarbon exploration and exploitation&amp;nbsp; activities on deep-sea sponges and the habitats they form. These impacts include those (1) at&amp;nbsp; community level, decreasing the diversity and density of benthic communities associated&amp;nbsp; with deep-sea sponges owing to physical disturbance of the seabed; (2) at individual level, interrupting filtration owing to exposure to increased sedimentation; and (3) at cellular level, decreasing cellular membrane stability owing to exposure to drill muds. However, many &amp;nbsp;potential effects not yet tested in deep-sea sponges but observed in shallow-water sponges or&amp;nbsp;other model organisms should also be taken into account. Furthermore, to the best of our&amp;nbsp;knowledge, no studies have shown impact of oil or dispersed oil on deep-sea sponges. To &amp;nbsp;highlight these significant knowledge gaps, a summary table of potential and known impacts&amp;nbsp;of hydrocarbon extraction and production activities combined with a simple &amp;ldquo;traffic light&amp;rdquo; &amp;nbsp;scheme is also provided.&amp;nbsp;&lt;/p&gt;</description>
      <funderName>European Commission</funderName>
      <funderIdentifier funderIdentifierType="Crossref Funder ID">10.13039/501100000780</funderIdentifier>
      <awardNumber awardURI="info:eu-repo/grantAgreement/EC/H2020/678760/">678760</awardNumber>
      <awardTitle>A Trans-AtLantic Assessment and deep-water ecosystem-based Spatial management plan for Europe</awardTitle>
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