Manganese nodule crevice fauna

Thiel, Hjalmar; Schriever, Gerd; Bussau, C.; Borowski, Christian

doi:10.1016/0967-0637(93)90012-r

Cited by 56 publications

(50 citation statements)

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“…sponges, actinids, stalked crinoids, octocorallians, sedentary polychaetes, antipatharids, and tunicates, that settle on the nodules. This key conclusion has been supported by Thiel et al (1993) and Veillette et al (2007b). In addition, it appears that the nature of the sediments may differ, with softer sediments being located outside of the nodule fields compared to within them.…”

Section: The Structure Of Faunal Communities In the Cczsupporting

confidence: 53%

“…There is clearly a markedly greater abundance and taxonomic richness of megafauna and macrofauna in nodule bearing areas, while meiofauna prefers nodule free areas. This general pattern has been observed not only in the CCZ (Mullineaux, 1987;Morgan, 1991;Radziejewska, 1997;Radziejewska and Stoyanova, 2000;Galeron et al, 2006;ISBA, 2008;Stoyanova, 2008;Gooday et al, 2015;Amon et al, 2016;Vanreusel et al, 2016) but also within the eastern Pacific in the Peru basin, where the nodule crevice fauna has been found to be distinctly different from that living in the sediment in the proximity of the nodules (Tilot, 1989;Thiel et al, 1993).…”

Section: The Structure Of Faunal Communities In the Cczmentioning

confidence: 99%

“…In particular, the benthic fauna plays an important role in carbon cycling and mineralization within the epibenthos. Interestingly it also contributes to the genesis of polymetallic nodules, bioturbation along with bottom currents playing a role in allowing nodules to remain on the seafloor (Dugolinsky et al, 1977;Du Castel, 1985;Mullineaux, 1987;Thiel et al, 1993;Veillette et al, 2007a,b).…”

Section: Introductionmentioning

confidence: 99%

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The Benthic Megafaunal Assemblages of the CCZ (Eastern Pacific) and an Approach to their Management in the Face of Threatened Anthropogenic Impacts

et al. 2018

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We present here the results of a UNESCO/IOC baseline study of the megafaunal assemblages of the polymetallic nodule ecosystem of 5 areas within the Clarion Clipperton Zone (CCZ) of the eastern Pacific Ocean. The work was undertaken with a view to investigating the structure of the epifaunal populations associated with the benthic biotopes being targeted for nodule mining and developing an appropriate set of management tools and options. The general characteristics of nodule ecosystem and assemblages and their sensitivity to deep-sea mining are discussed in relation to water masses, surface to seabed water circulation, the nepheloid layer and processes taking place at the sediment interface. Management tools considered include species diversity and vulnerability indexes, GIS systems, zoning, and 3D rapid environmental assessment (REA). These strategies are proposed for trial during pilot mining operations within the CCZ.

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Section: The Structure Of Faunal Communities In the Cczsupporting

confidence: 53%

Section: The Structure Of Faunal Communities In the Cczmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Benthic Megafaunal Assemblages of the CCZ (Eastern Pacific) and an Approach to their Management in the Face of Threatened Anthropogenic Impacts

et al. 2018

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“…Chung et al (2002) summarised the potential impact on benthic fauna during mining activities: (1) direct impact along the track of the nodule collector, where the sediment and associated fauna is crushed or dispersed in a plume, and the nodules are removed, (2) smothering or entombment of benthic fauna by the sediment plume, and (3) destruction of food resources for some species. The nodules themselves constitute a specific habitat for some organisms inhabiting their surface and the interstitial space inside their crevices and internal cavities (Thiel et al 1993;Veillette et al 2007a, b). In general, nematodes inhabiting the surface and crevices of nodules differ from the assemblages in the surrounding soft sediments, and some species are exclusively reported only in nodule crevices (Bussau 1993;Thiel et al 1993;Bussau et al 1995;Veillette et al 2007a, b).…”

Section: Exploitation Of Mineral Resourcesmentioning

confidence: 99%

“…The nodules themselves constitute a specific habitat for some organisms inhabiting their surface and the interstitial space inside their crevices and internal cavities (Thiel et al 1993;Veillette et al 2007a, b). In general, nematodes inhabiting the surface and crevices of nodules differ from the assemblages in the surrounding soft sediments, and some species are exclusively reported only in nodule crevices (Bussau 1993;Thiel et al 1993;Bussau et al 1995;Veillette et al 2007a, b). Surprisingly, Bussau (1992) also found unique tardigrade fauna on and inside the manganese nodules from the Peru Basin at water depths from 4140 to 4170 m. The new genus and three new species he described (Bussau 1992) have never been observed outside the manganese nodule area and may be endemic.…”

Section: Exploitation Of Mineral Resourcesmentioning

confidence: 99%

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

et al. 2015

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Our planet is changing, and one of the most pressing challenges facing the scientific community revolves around understanding how ecological communities respond to global changes. From coastal to deep-sea ecosystems, ecologists are exploring new areas of research to find model organisms that help predict the future of life on our planet. Among the different categories of organisms, meiofauna offer several advantages for the study of marine benthic ecosystems. This paper reviews the advances in the study of meiofauna with regard to climate change and anthropogenic impacts. Four taxonomic groups are valuable for predicting global changes: foraminifers (especially calcareous forms), nematodes, copepods and ostracods. Environmental variables are fundamental in the interpretation of meiofaunal patterns and multistressor experiments are more informative than single stressor ones, revealing complex ecological and biological interactions. Global change has a general negative effect on meiofauna, with important consequences on benthic food webs. However, some meiofaunal species can be favoured by the extreme conditions induced by global change, as they can exhibit remarkable physiological adaptations. This review highlights the need to incorporate studies on taxonomy,

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Responses of Deep-Sea Meiobenthic Communities to Sediment Disturbance Simulating Effects of Polymetallic Nodule Mining

Radziejewska

2002

Internat. Rev. Hydrobiol.

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During a benthic impact experiment (BIE) carried out during 1995–1997 by the Interoceanmetal Joint Organization (IOM) at an abyssal site in the North‐East Pacific, sediment disturbance mimicking that resulting from polymetallic nodule extraction was created with a specialised device (the Benthic Disturber). The effects of the disturbance on meiobenthic communities were assessed immediately after disturbance and 22 months later. A reduction in meiobenthos abundance, observed immediately following impact, was not significant; neither were changes in composition of the meiobenthos which was dominated by nematodes and harpacticoids. The lack of any significant numerical response is probably accounted for by the moderate degree of disturbance in this study, compared with other BIE‐type experiments. On the other hand, statistically significant changes in both meiofauna abundance and vertical distribution profiles in the changed sediment within the Disturber tracks were recorded. After 22 months, a significant increase in overall meiobenthos abundance was detected in that part of the test site affected by increased resuspended sediment settlement and receiving natural phytodetrital inputs. Certain taxon‐specific responses on the part of nematodes and harpacticoids were noted both immediately after the disturbance and 22 months later. They were explained by the effects of sediment physical reworking and responses to phytodetrital enrichment. The results presented should aid in developing experimental designs, on both temporal and spatial scales, of future deep‐sea tests aimed at assessing the scale and consequences of man‐made impacts.

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Manganese nodule crevice fauna

Cited by 56 publications

References 4 publications

The Benthic Megafaunal Assemblages of the CCZ (Eastern Pacific) and an Approach to their Management in the Face of Threatened Anthropogenic Impacts

The Benthic Megafaunal Assemblages of the CCZ (Eastern Pacific) and an Approach to their Management in the Face of Threatened Anthropogenic Impacts

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

Responses of Deep-Sea Meiobenthic Communities to Sediment Disturbance Simulating Effects of Polymetallic Nodule Mining

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