Potential impacts of polymetallic nodule removal on deep-sea meiofauna

Abstract Deep seabed mining is potentially imminent in the Clarion Clipperton Fracture Zone (CCFZ; northeast Pacific). Seabed collectors will remove polymetallic nodules and the surrounding surface sediments, both inhabited by meiofauna, along their path. To determine potential impacts of polymetall...

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Autores principales:	Ellen Pape, Tania Nara Bezerra, Hendrik Gheerardyn, Marius Buydens, Amanda Kieswetter, Ann Vanreusel
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1c44ed8f2a31411bb27216fc4800490b
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spelling	oai:doaj.org-article:1c44ed8f2a31411bb27216fc4800490b2021-12-02T19:16:19ZPotential impacts of polymetallic nodule removal on deep-sea meiofauna10.1038/s41598-021-99441-32045-2322https://doaj.org/article/1c44ed8f2a31411bb27216fc4800490b2021-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99441-3https://doaj.org/toc/2045-2322Abstract Deep seabed mining is potentially imminent in the Clarion Clipperton Fracture Zone (CCFZ; northeast Pacific). Seabed collectors will remove polymetallic nodules and the surrounding surface sediments, both inhabited by meiofauna, along their path. To determine potential impacts of polymetallic nodule removal, we investigated the importance of nodule presence for the abundance, composition and diversity of sediment meiofauna, and evaluated the existence and composition of nodule crevice meiofauna in the Global Sea Mineral Resources (GSR) exploration contract area. Nodule-free and nodule-rich sediments displayed high biodiversity with many singletons and doubletons, potentially representing rare taxa. Nodule presence negatively influenced sediment meiofaunal abundances but did not markedly affect taxonomic composition or diversity. This is the first report on CCFZ nodule crevice meiofauna, whose abundance related positively to nodule dimensions. Though dominated by the same taxa, nodules and sediments differed regarding the taxonomic and trophic composition of the meio- and nematofauna. Nevertheless, there were no taxa endemic to the nodule crevices and nodule crevice meiofauna added only little to total small-scale (~ cm) meiofaunal abundance and diversity. We formulated environmental management recommendations at the contract area and regional (CCFZ) scale related to sampling effort, set-aside preservation and monitoring areas, and potential rehabilitation measures.Ellen PapeTania Nara BezerraHendrik GheerardynMarius BuydensAmanda KieswetterAnn VanreuselNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ellen Pape Tania Nara Bezerra Hendrik Gheerardyn Marius Buydens Amanda Kieswetter Ann Vanreusel Potential impacts of polymetallic nodule removal on deep-sea meiofauna
description	Abstract Deep seabed mining is potentially imminent in the Clarion Clipperton Fracture Zone (CCFZ; northeast Pacific). Seabed collectors will remove polymetallic nodules and the surrounding surface sediments, both inhabited by meiofauna, along their path. To determine potential impacts of polymetallic nodule removal, we investigated the importance of nodule presence for the abundance, composition and diversity of sediment meiofauna, and evaluated the existence and composition of nodule crevice meiofauna in the Global Sea Mineral Resources (GSR) exploration contract area. Nodule-free and nodule-rich sediments displayed high biodiversity with many singletons and doubletons, potentially representing rare taxa. Nodule presence negatively influenced sediment meiofaunal abundances but did not markedly affect taxonomic composition or diversity. This is the first report on CCFZ nodule crevice meiofauna, whose abundance related positively to nodule dimensions. Though dominated by the same taxa, nodules and sediments differed regarding the taxonomic and trophic composition of the meio- and nematofauna. Nevertheless, there were no taxa endemic to the nodule crevices and nodule crevice meiofauna added only little to total small-scale (~ cm) meiofaunal abundance and diversity. We formulated environmental management recommendations at the contract area and regional (CCFZ) scale related to sampling effort, set-aside preservation and monitoring areas, and potential rehabilitation measures.
format	article
author	Ellen Pape Tania Nara Bezerra Hendrik Gheerardyn Marius Buydens Amanda Kieswetter Ann Vanreusel
author_facet	Ellen Pape Tania Nara Bezerra Hendrik Gheerardyn Marius Buydens Amanda Kieswetter Ann Vanreusel
author_sort	Ellen Pape
title	Potential impacts of polymetallic nodule removal on deep-sea meiofauna
title_short	Potential impacts of polymetallic nodule removal on deep-sea meiofauna
title_full	Potential impacts of polymetallic nodule removal on deep-sea meiofauna
title_fullStr	Potential impacts of polymetallic nodule removal on deep-sea meiofauna
title_full_unstemmed	Potential impacts of polymetallic nodule removal on deep-sea meiofauna
title_sort	potential impacts of polymetallic nodule removal on deep-sea meiofauna
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1c44ed8f2a31411bb27216fc4800490b
work_keys_str_mv	AT ellenpape potentialimpactsofpolymetallicnoduleremovalondeepseameiofauna AT tanianarabezerra potentialimpactsofpolymetallicnoduleremovalondeepseameiofauna AT hendrikgheerardyn potentialimpactsofpolymetallicnoduleremovalondeepseameiofauna AT mariusbuydens potentialimpactsofpolymetallicnoduleremovalondeepseameiofauna AT amandakieswetter potentialimpactsofpolymetallicnoduleremovalondeepseameiofauna AT annvanreusel potentialimpactsofpolymetallicnoduleremovalondeepseameiofauna
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Potential impacts of polymetallic nodule removal on deep-sea meiofauna

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