Changes in Nematode Communities in Different Physiographic Sites of the Condor Seamount (North-East Atlantic Ocean) and Adjacent Sediments
Identifieur interne : 000359 ( Ncbi/Merge ); précédent : 000358; suivant : 000360Changes in Nematode Communities in Different Physiographic Sites of the Condor Seamount (North-East Atlantic Ocean) and Adjacent Sediments
Auteurs : Daniela Zeppilli [Portugal, France] ; Lucia Bongiorni [Portugal, Italie] ; Ricardo Serrão Santos [Portugal] ; Ann Vanreusel [Belgique]Source :
- PLoS ONE [ 1932-6203 ] ; 2014.
Abstract
Several seamounts are known as ‘oases’ of high abundances and biomass and hotspots of biodiversity in contrast to the surrounding deep-sea environments. Recent studies have indicated that each single seamount can exhibit a high intricate habitat turnover. Information on alpha and beta diversity of single seamount is needed in order to fully understand seamounts contribution to regional and global biodiversity. However, while most of the seamount research has been focused on summits, studies considering the whole seamount structure are still rather poor. In the present study we analysed abundance, biomass and diversity of nematodes collected in distinct physiographic sites and surrounding sediments of the Condor Seamount (Azores, North-East Atlantic Ocean). Our study revealed higher nematode biomass in the seamount bases and values 10 times higher in the Condor sediments than in the far-field site. Although biodiversity indices did not showed significant differences comparing seamount sites and far-field sites, significant differences were observed in term of nematode composition. The Condor summit harboured a completely different nematode community when compared to the other seamount sites, with a high number of exclusive species and important differences in term of nematode trophic diversity. The oceanographic conditions observed around the Condor Seamount and the associated sediment mixing, together with the high quality of food resources available in seamount base could explain the observed patterns. Our results support the hypothesis that seamounts maintain high biodiversity through heightened beta diversity and showed that not only summits but also seamount bases can support rich benthic community in terms of standing stocks and diversity. Furthermore functional diversity of nematodes strongly depends on environmental conditions link to the local setting and seamount structure. This finding should be considered in future studies on seamounts, especially in view of the potential impacts due to current and future anthropogenic threats.
Url:
DOI: 10.1371/journal.pone.0115601
PubMed: 25541988
PubMed Central: 4277353
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<front><div type="abstract" xml:lang="en"><p>Several seamounts are known as ‘oases’ of high abundances and biomass and hotspots of biodiversity in contrast to the surrounding deep-sea environments. Recent studies have indicated that each single seamount can exhibit a high intricate habitat turnover. Information on alpha and beta diversity of single seamount is needed in order to fully understand seamounts contribution to regional and global biodiversity. However, while most of the seamount research has been focused on summits, studies considering the whole seamount structure are still rather poor. In the present study we analysed abundance, biomass and diversity of nematodes collected in distinct physiographic sites and surrounding sediments of the Condor Seamount (Azores, North-East Atlantic Ocean). Our study revealed higher nematode biomass in the seamount bases and values 10 times higher in the Condor sediments than in the far-field site. Although biodiversity indices did not showed significant differences comparing seamount sites and far-field sites, significant differences were observed in term of nematode composition. The Condor summit harboured a completely different nematode community when compared to the other seamount sites, with a high number of exclusive species and important differences in term of nematode trophic diversity. The oceanographic conditions observed around the Condor Seamount and the associated sediment mixing, together with the high quality of food resources available in seamount base could explain the observed patterns. Our results support the hypothesis that seamounts maintain high biodiversity through heightened beta diversity and showed that not only summits but also seamount bases can support rich benthic community in terms of standing stocks and diversity. Furthermore functional diversity of nematodes strongly depends on environmental conditions link to the local setting and seamount structure. This finding should be considered in future studies on seamounts, especially in view of the potential impacts due to current and future anthropogenic threats.</p>
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<pmc article-type="research-article"><pmc-dir>properties open_access</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-ta">PLoS One</journal-id>
<journal-id journal-id-type="iso-abbrev">PLoS ONE</journal-id>
<journal-id journal-id-type="publisher-id">plos</journal-id>
<journal-id journal-id-type="pmc">plosone</journal-id>
<journal-title-group><journal-title>PLoS ONE</journal-title>
</journal-title-group>
<issn pub-type="epub">1932-6203</issn>
<publisher><publisher-name>Public Library of Science</publisher-name>
<publisher-loc>San Francisco, USA</publisher-loc>
</publisher>
</journal-meta>
<article-meta><article-id pub-id-type="pmid">25541988</article-id>
<article-id pub-id-type="pmc">4277353</article-id>
<article-id pub-id-type="publisher-id">PONE-D-14-37961</article-id>
<article-id pub-id-type="doi">10.1371/journal.pone.0115601</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject>
</subj-group>
<subj-group subj-group-type="Discipline-v2"><subject>Biology and Life Sciences</subject>
<subj-group><subject>Ecology</subject>
<subj-group><subject>Coastal Ecology</subject>
<subject>Marine Ecology</subject>
</subj-group>
</subj-group>
<subj-group><subject>Marine Biology</subject>
</subj-group>
</subj-group>
<subj-group subj-group-type="Discipline-v2"><subject>Earth Sciences</subject>
<subj-group><subject>Marine and Aquatic Sciences</subject>
</subj-group>
</subj-group>
<subj-group subj-group-type="Discipline-v2"><subject>Ecology and Environmental Sciences</subject>
<subj-group><subject>Terrestrial Environments</subject>
<subj-group><subject>Seamounts</subject>
</subj-group>
</subj-group>
</subj-group>
</article-categories>
<title-group><article-title>Changes in Nematode Communities in Different Physiographic Sites of the Condor Seamount (North-East Atlantic Ocean) and Adjacent Sediments</article-title>
<alt-title alt-title-type="running-head">Changes in Nematode Communities in the Condor Seamount</alt-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Zeppilli</surname>
<given-names>Daniela</given-names>
</name>
<xref ref-type="aff" rid="aff1"><sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2"><sup>2</sup>
</xref>
<xref ref-type="aff" rid="aff3"><sup>3</sup>
</xref>
<xref ref-type="corresp" rid="cor1"><sup>*</sup>
</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Bongiorni</surname>
<given-names>Lucia</given-names>
</name>
<xref ref-type="aff" rid="aff1"><sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff4"><sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Serrão Santos</surname>
<given-names>Ricardo</given-names>
</name>
<xref ref-type="aff" rid="aff1"><sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff5"><sup>5</sup>
</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Vanreusel</surname>
<given-names>Ann</given-names>
</name>
<xref ref-type="aff" rid="aff6"><sup>6</sup>
</xref>
</contrib>
</contrib-group>
<aff id="aff1"><label>1</label>
<addr-line>Centre of IMAR of the University of the Azores & LARSyS Associated Laboratory, PT-9901-862 Horta, Azores, Portugal</addr-line>
</aff>
<aff id="aff2"><label>2</label>
<addr-line>IFREMER, Centre Brest, REM/EEP/LEP, Institut Carnot Ifremer-EDROME, ZI de la pointe du diable, CS10070, Plouzané, France</addr-line>
</aff>
<aff id="aff3"><label>3</label>
<addr-line>Université de Brest, Institut Universitaire Européen de la Mer, Laboratoire des sciences de l'environnement marin (UMR6539 CNRS/IRD/UBO), Plouzané, France</addr-line>
</aff>
<aff id="aff4"><label>4</label>
<addr-line>Institute of Marine Sciences – National Research Council (ISMAR-CNR), Arsenale - Tesa 104, Castello 2737/F, Venezia, Italy</addr-line>
</aff>
<aff id="aff5"><label>5</label>
<addr-line>Department of Ocenography and Fisheries of the University of the Azores, PT-9901-862 Horta, Azores, Portugal</addr-line>
</aff>
<aff id="aff6"><label>6</label>
<addr-line>Department of Biology, Marine Biology section, Ghent University, Krijgslaan 281, S8, Ghent, Belgium</addr-line>
</aff>
<contrib-group><contrib contrib-type="editor"><name><surname>Bianchi</surname>
<given-names>Carlo Nike</given-names>
</name>
<role>Editor</role>
<xref ref-type="aff" rid="edit1"></xref>
</contrib>
</contrib-group>
<aff id="edit1"><addr-line>Università di Genova, Italy</addr-line>
</aff>
<author-notes><corresp id="cor1">* E-mail: <email>Daniela.Zeppilli@ifremer.fr</email>
</corresp>
<fn fn-type="conflict"><p><bold>Competing Interests: </bold>
The authors have declared that no competing interests exist.</p>
</fn>
<fn fn-type="con"><p>Conceived and designed the experiments: LB DZ. Performed the experiments: LB DZ. Analyzed the data: DZ LB AV. Contributed reagents/materials/analysis tools: DZ LB RSS. Wrote the paper: DZ LB AV RSS. Species identification: DZ AV. The Principal Investigators of the FCT grant that founded the study described in this manuscript: LB RSS.</p>
</fn>
</author-notes>
<pub-date pub-type="collection"><year>2014</year>
</pub-date>
<pub-date pub-type="epub"><day>26</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>9</volume>
<issue>12</issue>
<elocation-id>e115601</elocation-id>
<history><date date-type="received"><day>2</day>
<month>9</month>
<year>2014</year>
</date>
<date date-type="accepted"><day>29</day>
<month>11</month>
<year>2014</year>
</date>
</history>
<permissions><copyright-year>2014</copyright-year>
<copyright-holder>Zeppilli et al</copyright-holder>
<license><license-p>This is an open-access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution License</ext-link>
, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</license-p>
</license>
</permissions>
<abstract><p>Several seamounts are known as ‘oases’ of high abundances and biomass and hotspots of biodiversity in contrast to the surrounding deep-sea environments. Recent studies have indicated that each single seamount can exhibit a high intricate habitat turnover. Information on alpha and beta diversity of single seamount is needed in order to fully understand seamounts contribution to regional and global biodiversity. However, while most of the seamount research has been focused on summits, studies considering the whole seamount structure are still rather poor. In the present study we analysed abundance, biomass and diversity of nematodes collected in distinct physiographic sites and surrounding sediments of the Condor Seamount (Azores, North-East Atlantic Ocean). Our study revealed higher nematode biomass in the seamount bases and values 10 times higher in the Condor sediments than in the far-field site. Although biodiversity indices did not showed significant differences comparing seamount sites and far-field sites, significant differences were observed in term of nematode composition. The Condor summit harboured a completely different nematode community when compared to the other seamount sites, with a high number of exclusive species and important differences in term of nematode trophic diversity. The oceanographic conditions observed around the Condor Seamount and the associated sediment mixing, together with the high quality of food resources available in seamount base could explain the observed patterns. Our results support the hypothesis that seamounts maintain high biodiversity through heightened beta diversity and showed that not only summits but also seamount bases can support rich benthic community in terms of standing stocks and diversity. Furthermore functional diversity of nematodes strongly depends on environmental conditions link to the local setting and seamount structure. This finding should be considered in future studies on seamounts, especially in view of the potential impacts due to current and future anthropogenic threats.</p>
</abstract>
<funding-group><funding-statement>This study was funded by the CONDOR project (Observatory for long term study and monitoring of Azorean ecosystem, EEA Grants PT0040/2008, (Iceland, Liechtenstein), the Fundação para a Ciência e Tecnologia, Portugal (FCT Project BIOMOUNT, PTDC/MAR/105486/2008, COMPETE/FEDERE funds). IMAR-DOP/UAz is Research and Development Unit no. 531 and LARSyS-Associated Laboratory no. 9 funded by the Portuguese Foundation for Science and Technology (FCT) through FCT - Pest/OE/EEI/LA0009/2011-2014 and by the Azores Fund for Science and Technology (FRCT), funded by OE, COMPETE, QREN and ProConvergencia. The Open Access of this paper is funded by FCT -Pest/OE/EEI/LA0009/2014 (OE, COMPETE and QREN). DZ was partly supported by the “Laboratoire d'Excellence” LabexMER (ANR-10-LABX-19), co-funded by a grant from the French government under the program “Investissements d'Avenir” by a grant from the Regional Council of Brittany (SAD programme), and by the project “Deep-sea hYdrothermal Vent nematodes as potential source of new Antibiotics” (DYVA) funded by Fondation Total and Ifremer. LB was supported by the RITMARE flagship project 2012-2016 funded by MIUR and coordinated by CNR, Italy. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.</funding-statement>
</funding-group>
<counts><page-count count="26"></page-count>
</counts>
<custom-meta-group><custom-meta id="data-availability"><meta-name>Data Availability</meta-name>
<meta-value>The authors confirm that all data underlying the findings are fully available without restriction. All relevant data are within the paper.</meta-value>
</custom-meta>
</custom-meta-group>
</article-meta>
<notes><title>Data Availability</title>
<p>The authors confirm that all data underlying the findings are fully available without restriction. All relevant data are within the paper.</p>
</notes>
</front>
</pmc>
<affiliations><list><country><li>Belgique</li>
<li>France</li>
<li>Italie</li>
<li>Portugal</li>
</country>
<region><li>Champagne-Ardenne</li>
<li>Grand Est</li>
<li>Province de Flandre-Orientale</li>
<li>Région flamande</li>
</region>
<settlement><li>Gand</li>
<li>Plouzané</li>
</settlement>
<orgName><li>Université de Gand</li>
</orgName>
</list>
<tree><country name="Portugal"><noRegion><name sortKey="Zeppilli, Daniela" sort="Zeppilli, Daniela" uniqKey="Zeppilli D" first="Daniela" last="Zeppilli">Daniela Zeppilli</name>
</noRegion>
<name sortKey="Bongiorni, Lucia" sort="Bongiorni, Lucia" uniqKey="Bongiorni L" first="Lucia" last="Bongiorni">Lucia Bongiorni</name>
<name sortKey="Serrao Santos, Ricardo" sort="Serrao Santos, Ricardo" uniqKey="Serrao Santos R" first="Ricardo" last="Serrão Santos">Ricardo Serrão Santos</name>
<name sortKey="Serrao Santos, Ricardo" sort="Serrao Santos, Ricardo" uniqKey="Serrao Santos R" first="Ricardo" last="Serrão Santos">Ricardo Serrão Santos</name>
</country>
<country name="France"><region name="Grand Est"><name sortKey="Zeppilli, Daniela" sort="Zeppilli, Daniela" uniqKey="Zeppilli D" first="Daniela" last="Zeppilli">Daniela Zeppilli</name>
</region>
<name sortKey="Zeppilli, Daniela" sort="Zeppilli, Daniela" uniqKey="Zeppilli D" first="Daniela" last="Zeppilli">Daniela Zeppilli</name>
</country>
<country name="Italie"><noRegion><name sortKey="Bongiorni, Lucia" sort="Bongiorni, Lucia" uniqKey="Bongiorni L" first="Lucia" last="Bongiorni">Lucia Bongiorni</name>
</noRegion>
</country>
<country name="Belgique"><region name="Région flamande"><name sortKey="Vanreusel, Ann" sort="Vanreusel, Ann" uniqKey="Vanreusel A" first="Ann" last="Vanreusel">Ann Vanreusel</name>
</region>
</country>
</tree>
</affiliations>
</record>
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