Assessment of Abyssal Benthic Megafauna on a Ferromanganese Nodule Deposit Using Videotaped Television Survey Data

Foell, E.J.; Hennigar, H.F.; Pawson, David L.

doi:10.4043/5996-ms

Cited by 4 publications

(3 citation statements)

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“…Faunal abundances in potential mining areas should range from 30-300 individuals/1000 m2 for megafauna, 40-200 individuals/m* for macrofauna, and 80-500 individuals/lO cm2 for meiofauna. Bacterial numbers will fall in the order of magnitude of 107 cells/ml (based on unpublished data from the DISCOL project and HESSLER & JUMARS 1974, HECKER & PAUL 1979, THIEL 1988, FOELL et al 1991. Several small scale colonization experiments have been conducted in the deep sea (GRASSLE 1977, GRASSLE & MORSE-PORTEOUS 1987, DESBRUYERES et af.…”

Section: Introductionmentioning

confidence: 99%

Deep‐sea Environmental Disturbance and Recovery Potential

Thiel

1992

Intl Review of Hydrobiology

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Mining the abyssal seafloor for manganese nodules will destroy the hard substrate and it will severely disturb the seabed and the benthic soft substrate community. Recolonization will occur from unmined areas. Reestablishment of a community similar to that originally present is, however, not possible, since the nodules will be removed and epigrowth on hard substrates is thereby precluded. Small scale experiments using azoic sediment in trays exposed to ambient deep-sea conditions, may not be appropriate models for large scale recolonization processes.Results of such experiments and general knowledge of deep-sea ecology suggest that decades may be required for reestablishment of a balanced community.With respect to evaluation of some ecological consequences of mining an ongoing large scale experiment, termed DISCOL (DIS-turbance and re-COL-onization) is shortly described as a new approach in deep-sea risk assessment.

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Section: Introductionmentioning

confidence: 99%

Deep‐sea Environmental Disturbance and Recovery Potential

Thiel

1992

Intl Review of Hydrobiology

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“…7), which shows that the variation in nodule population does not dramatically affect the intensity of the surface biological activity. Foell et al (1989) also observed that the variation in nodule abundance has no effect on megafaunal density or diversity. However, it was also observed that the number of burrows decreases with an increase in the nodule abundance, either due to limited availability of sediment area for burrowing or due to the presence of buried nodules in these areas.…”

Section: Relation Of Megabenthic Activity and Substratesmentioning

confidence: 82%

Quantitative estimation of seafloor features from photographs and their application to nodule mining

Sharma¹

1993

Marine Georesources & Geotechnology

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“…Most of them (18 out of 29) have very high coverage (>70%), of which a majority (14) have almost 100% coverage on the seafloor. Rock exposures were observed fiom photographs at 29 locations in the study area, their areal extent varying fiom 5 to 100% coverage on the seafloor.…”

Section: Occurrence Of Rock Outcropsmentioning

confidence: 99%

Nodule distribution characteristics and associated seafloor features: factors for exploitation of deepsea Fe-Mn deposits

Sharrna

1997

All Days

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This paper was selacted lor presentation by th8 OTe program commlftaa following review r:A Informllllon contained in ." ab8tr8c:l submitted by the lIUtIlor(s). Contents r:A th8 paper, as presented, hlIv8 not been reviewed by th8 Offshore Technology Conference and are subject to corrwction by the lIUtIlor(s). The material, as preMnled, does not _ n l y reIlecl any position r:A the Offshore Technology ConI~or ns oIIlc8l1: EleclnxlIc reproduction, distribution, or s10rIlglI r:A any part r:A this paper lor commBrCl81 purposes willlout the wrlttBn conSM1l r:A th8 Offshonl T8ChnOIogy ConIBnlIlC8 IS prohlbited.Parmisslon 10 "'Produce in pnnt is restrtcted 10 an 8bsIrlICl r:A not more th8II 300 words;Hlustrations may not be copied. The 8b5trect must contain con8Pfcuous acknowledgement r:A where Bn

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Assessment of Abyssal Benthic Megafauna on a Ferromanganese Nodule Deposit Using Videotaped Television Survey Data

Cited by 4 publications

References 0 publications

Deep‐sea Environmental Disturbance and Recovery Potential

Deep‐sea Environmental Disturbance and Recovery Potential

Quantitative estimation of seafloor features from photographs and their application to nodule mining

Nodule distribution characteristics and associated seafloor features: factors for exploitation of deepsea Fe-Mn deposits

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