Threatened by mining, polymetallic nodules are required to preserve abyssal epifauna
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Open Access
- 1 June 2016
- journal article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 6 (1), 26808
- https://doi.org/10.1038/srep26808
Abstract
Polymetallic nodule mining at abyssal depths in the Clarion Clipperton Fracture Zone (Eastern Central Pacific) will impact one of the most remote and least known environments on Earth. Since vast areas are being targeted by concession holders for future mining, large-scale effects of these activities are expected. Hence, insight into the fauna associated with nodules is crucial to support effective environmental management. In this study video surveys were used to compare the epifauna from sites with contrasting nodule coverage in four license areas. Results showed that epifaunal densities are more than two times higher at dense nodule coverage (>25 versus ≤10 individuals per 100 m2), and that taxa such as alcyonacean and antipatharian corals are virtually absent from nodule-free areas. Furthermore, surveys conducted along tracks from trawling or experimental mining simulations up to 37 years old, suggest that the removal of epifauna is almost complete and that its full recovery is slow. By highlighting the importance of nodules for the epifaunal biodiversity of this abyssal area, we urge for cautious consideration of the criteria for determining future preservation zones.Keywords
This publication has 22 references indexed in Scilit:
- Man and the Last Great Wilderness: Human Impact on the Deep SeaPLOS ONE, 2011
- Tighten regulations on deep-sea miningNature, 2011
- Deep, diverse and definitely different: unique attributes of the world's largest ecosystemBiogeosciences (online), 2010
- Geochemical and biological recovery of the disturbed seafloor in polymetallic nodule fields of the Clipperton-Clarion Fracture Zone (CCFZ) at 5,000-m depthLimnology and Oceanography, 2006
- Do visual transects provide true population density estimates for deepwater fish?ICES Journal of Marine Science, 2004
- Long-term propagation of tailings from deep-sea mining under variable conditions by means of numerical simulationsDeep Sea Research Part II: Topical Studies in Oceanography, 2001
- Sediment redistribution during simulated benthic disturbance and its implications on deep seabed miningDeep Sea Research Part II: Topical Studies in Oceanography, 2001
- Evaluation of the environmental consequences of polymetallic nodule mining based on the results of the TUSCH Research AssociationDeep Sea Research Part II: Topical Studies in Oceanography, 2001
- The large-scale environmental impact experiment DISCOL—reflection and foresightDeep Sea Research Part II: Topical Studies in Oceanography, 2001
- The metallic minerals of the Pacific SeafloorGeoJournal, 1980