Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains

Abstract Polymetallic nodule fields provide hard substrate for sessile organisms on the abyssal seafloor between 3000 and 6000 m water depth. Deep-seabed mining targets these mineral-rich nodules and will likely modify the consumer-resource (trophic) and substrate-providing (non-trophic) interaction...

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Autores principales:	Tanja Stratmann, Karline Soetaert, Daniel Kersken, Dick van Oevelen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2e3ba6d7d6734ee8a5f809de585c0b4f
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spelling	oai:doaj.org-article:2e3ba6d7d6734ee8a5f809de585c0b4f2021-12-02T17:52:22ZPolymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains10.1038/s41598-021-91703-42045-2322https://doaj.org/article/2e3ba6d7d6734ee8a5f809de585c0b4f2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-91703-4https://doaj.org/toc/2045-2322Abstract Polymetallic nodule fields provide hard substrate for sessile organisms on the abyssal seafloor between 3000 and 6000 m water depth. Deep-seabed mining targets these mineral-rich nodules and will likely modify the consumer-resource (trophic) and substrate-providing (non-trophic) interactions within the abyssal food web. However, the importance of nodules and their associated sessile fauna in supporting food-web integrity remains unclear. Here, we use seafloor imagery and published literature to develop highly-resolved trophic and non-trophic interaction webs for the Clarion-Clipperton Fracture Zone (CCZ, central Pacific Ocean) and the Peru Basin (PB, South-East Pacific Ocean) and to assess how nodule removal may modify these networks. The CCZ interaction web included 1028 compartments connected with 59,793 links and the PB interaction web consisted of 342 compartments and 8044 links. We show that knock-down effects of nodule removal resulted in a 17.9% (CCZ) to 20.8% (PB) loss of all taxa and 22.8% (PB) to 30.6% (CCZ) loss of network links. Subsequent analysis identified stalked glass sponges living attached to the nodules as key structural species that supported a high diversity of associated fauna. We conclude that polymetallic nodules are critical for food-web integrity and that their absence will likely result in reduced local benthic biodiversity.Tanja StratmannKarline SoetaertDaniel KerskenDick van OevelenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tanja Stratmann Karline Soetaert Daniel Kersken Dick van Oevelen Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains
description	Abstract Polymetallic nodule fields provide hard substrate for sessile organisms on the abyssal seafloor between 3000 and 6000 m water depth. Deep-seabed mining targets these mineral-rich nodules and will likely modify the consumer-resource (trophic) and substrate-providing (non-trophic) interactions within the abyssal food web. However, the importance of nodules and their associated sessile fauna in supporting food-web integrity remains unclear. Here, we use seafloor imagery and published literature to develop highly-resolved trophic and non-trophic interaction webs for the Clarion-Clipperton Fracture Zone (CCZ, central Pacific Ocean) and the Peru Basin (PB, South-East Pacific Ocean) and to assess how nodule removal may modify these networks. The CCZ interaction web included 1028 compartments connected with 59,793 links and the PB interaction web consisted of 342 compartments and 8044 links. We show that knock-down effects of nodule removal resulted in a 17.9% (CCZ) to 20.8% (PB) loss of all taxa and 22.8% (PB) to 30.6% (CCZ) loss of network links. Subsequent analysis identified stalked glass sponges living attached to the nodules as key structural species that supported a high diversity of associated fauna. We conclude that polymetallic nodules are critical for food-web integrity and that their absence will likely result in reduced local benthic biodiversity.
format	article
author	Tanja Stratmann Karline Soetaert Daniel Kersken Dick van Oevelen
author_facet	Tanja Stratmann Karline Soetaert Daniel Kersken Dick van Oevelen
author_sort	Tanja Stratmann
title	Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains
title_short	Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains
title_full	Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains
title_fullStr	Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains
title_full_unstemmed	Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains
title_sort	polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in pacific abyssal plains
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2e3ba6d7d6734ee8a5f809de585c0b4f
work_keys_str_mv	AT tanjastratmann polymetallicnodulesareessentialforfoodwebintegrityofaprospectivedeepseabedminingareainpacificabyssalplains AT karlinesoetaert polymetallicnodulesareessentialforfoodwebintegrityofaprospectivedeepseabedminingareainpacificabyssalplains AT danielkersken polymetallicnodulesareessentialforfoodwebintegrityofaprospectivedeepseabedminingareainpacificabyssalplains AT dickvanoevelen polymetallicnodulesareessentialforfoodwebintegrityofaprospectivedeepseabedminingareainpacificabyssalplains
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Polymetallic nodules are essential for food-web integrity of a prospective deep-seabed mining area in Pacific abyssal plains

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