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Benthic megafaunal community structure of cobalt-rich manganese crusts on Necker Ridge

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dc.contributor.author Morgan, Nicole B. en
dc.contributor.author Cairns, Stephen D. en
dc.contributor.author Reiswig, Henry en
dc.contributor.author Baco, Amy R. en
dc.date.accessioned 2015-07-28T13:36:26Z
dc.date.available 2015-07-28T13:36:26Z
dc.date.issued 2015
dc.identifier.citation Morgan, Nicole B., Cairns, Stephen D., Reiswig, Henry, and Baco, Amy R. 2015. "<a href="https://repository.si.edu/handle/10088/26706">Benthic megafaunal community structure of cobalt-rich manganese crusts on Necker Ridge</a>." <em>Deep Sea Research Part I: Oceanographic Research Papers</em>. 104:92&ndash;105. <a href="https://doi.org/10.1016/j.dsr.2015.07.003">https://doi.org/10.1016/j.dsr.2015.07.003</a> en
dc.identifier.issn 0967-0637
dc.identifier.uri http://hdl.handle.net/10088/26706
dc.description.abstract In the North Pacific Ocean, the seamounts of the Hawaiian Archipelago and the Mid-Pacific Mountains are connected by Necker Ridge, a 600 km-long feature spanning a depth range of 1400-4000 m. The Necker Ridge is a part of a large area of the central and western Pacific under consideration for cobalt-rich manganese crust mining. We describe the fauna and community structure of the previously unsampled Necker Ridge based on explorations with the submersible Pisces IV. On five pinnacles and a portion of the Ridge ranging from 1400-2000 m deep, 27 transects were recorded using HD video, and voucher specimens were collected to aid in species identification. The video was analyzed to identify and count the megafauna found on each transect and to characterize the substrate. Diversity increased from south to north along the feature. There was a significant difference in community structure between southern and northern pinnacles, with southern pinnacles dominated by crinoids of the Family Charitometridae and northern pinnacles dominated by octocorals, especially the Families Isididae and Chrysogorgiidae. DistLM demonstrated a correlation between community structure on the pinnacles and at least six environmental variables, including latitude, sediment cover, and oxygen concentration, but not including depth. The discontinuous and patchy nature of these distinct megafaunal communities highlights growing evidence that cobalt-rich seamounts are highly heterogeneous habitats, and that managing seamounts may require more complex regulations than treating them as a single ecological unit. These results suggest that extensive community analysis should occur at a given site to determine management priority areas, prior to consideration of that site for exploitation of natural resources. en
dc.relation.ispartof Deep Sea Research Part I: Oceanographic Research Papers en
dc.title Benthic megafaunal community structure of cobalt-rich manganese crusts on Necker Ridge en
dc.type Journal Article en
dc.identifier.srbnumber 136618
dc.identifier.doi 10.1016/j.dsr.2015.07.003
rft.jtitle Deep Sea Research Part I: Oceanographic Research Papers
rft.volume 104
rft.spage 92
rft.epage 105
dc.description.SIUnit NH-Invertebrate Zoology en
dc.description.SIUnit NMNH en
dc.description.SIUnit Peer-reviewed en
dc.citation.spage 92
dc.citation.epage 105

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