Threatened by mining, polymetallic nodules are required to preserve abyssal epifauna

Vanreusel, Ann, Hilario, Ana, Ribeiro, Pedro A., Menot, Lenaick and Arbizu, Pedro Martínez (2016) Threatened by mining, polymetallic nodules are required to preserve abyssal epifauna Scientific Reports, 6 (26808). DOI 10.1038/srep26808.

[img]
Preview
Text
srep26808(1).pdf - Published Version
Available under License Creative Commons: Attribution 4.0.

Download (1230Kb) | Preview

Supplementary data:

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.

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/603418
Keywords: Polymetallic nodule mining, abyssal depths, Clarion Clipperton Fracture Zone, Eastern Central Pacific
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.1038/srep26808
ISSN: 2045-2322
Related URLs:
Projects: JPIO-MiningImpact, MIDAS
Expeditions/Models/Experiments:
Date Deposited: 22 Dec 2016 13:58
Last Modified: 22 Dec 2016 14:02
URI: http://oceanrep.geomar.de/id/eprint/35410

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...