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Relating Depth and Diversity of Bivalvia and Gastropoda in Two Contrasting Sub-Arctic Marine Regions

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Egilsdottir, Hronn
dc.contributor.author McGinty, Niall
dc.contributor.author Guðmundsson, Guðmundur
dc.date.accessioned 2020-09-14T09:28:32Z
dc.date.available 2020-09-14T09:28:32Z
dc.date.issued 2019-03-22
dc.identifier.citation Egilsdottir, H., et al. (2019). "Relating Depth and Diversity of Bivalvia and Gastropoda in Two Contrasting Sub-Arctic Marine Regions." 6(129).
dc.identifier.issn 2296-7745
dc.identifier.uri https://hdl.handle.net/20.500.11815/2064
dc.description Publisher's version (útgefin grein)
dc.description.abstract The need to understand species distribution- and biodiversity patterns in high-latitude marine regions is immediate as these marine environments are undergoing rapid environmental changes, including ocean warming and ocean acidification. By the year 2100, the seas north of the Greenland-Iceland-Faroe (GIF) topographic ridge are predicted to become largely corrosive to aragonite, a form of calcium carbonate commonly formed by calcifying molluscs. We examine depth-diversity relationships in bivalves and gastropods north and south of the GIF ridge, between 200 and 2000 m depth. We also identify bivalve and gastropod species that could be monitored to identify early signs of changes in benthic communities north of the GIF ridge, due to ocean acidification. Patterns of α-diversity were estimated through rarefaction, as E(S 20 ). Regional and depth related β-diversity was analyzed and the additive contribution of species replacement (turnover) and species loss/gain (nestedness) to β-diversity calculated. Despite sharing a significant number of species, diversity patterns differed between the study regions. The diversity patterns also differed between bivalves and gastropods. North of the GIF ridge, the relationship between α-diversity and depth was unimodal with a predominant decrease in bivalve and gastropod α-diversity between 300 and 2000 m depth. Species assemblages in the deep bathyal zone were partly nested subsets of the assemblages in the shallow bathyal zone. South of the GIF ridge, patterns in α-diversity were more ambiguous. Alpha diversity decreased between 300 and 2000 m depth in bivalves, with no clear trend observed in gastropods. This finding contradicts the recognized increase in α-diversity in the bathyal zone in the North Atlantic basin, perhaps due to the oceanographic conditions directly south of the GIF ridge. In contrast to that observed north of the GIF ridge, nestedness did not contribute significantly to β-diversity south of the GIF ridge. This comparative study sheds new light on deep-sea diversity patterns of molluscs in the high-latitude North Atlantic and provides baseline data on species occurrences. This information can inform future assessment of the impact of environmental changes in these regions and management efforts.
dc.description.sponsorship This work was supported by the “European Project on Ocean Acidification” EPOCA, which received funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 211384. HE was also supported by a grant from Fisheries Iceland.
dc.format.extent 129
dc.language.iso en
dc.publisher Frontiers Media SA
dc.relation info:eu-repo/grantAgreement/EC/FP7/211384
dc.relation.ispartofseries Frontiers in Marine Science;6(MAR)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Alpha diversity
dc.subject Arctic
dc.subject Beta diversity
dc.subject Bivalvia
dc.subject Diversity
dc.subject Gastropoda
dc.subject Iceland
dc.subject Nestedness
dc.subject Lindýr
dc.subject Sniglar
dc.subject Norður-heimskautið
dc.subject Líffræðileg fjölbreytni
dc.subject Sjávarlíffræði
dc.title Relating Depth and Diversity of Bivalvia and Gastropoda in Two Contrasting Sub-Arctic Marine Regions
dc.type info:eu-repo/semantics/article
dcterms.license This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.description.version Peer Reviewed
dc.identifier.journal Frontiers in Marine Science
dc.identifier.doi 10.3389/fmars.2019.00129
dc.relation.url https://www.frontiersin.org/article/10.3389/fmars.2019.00129/full
dc.contributor.department Jarðvísindastofnun (HÍ)
dc.contributor.department Institute of Earth Sciences (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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