Skip to main content
Dryad logo

Data from: Dark ophiuroid biodiversity in a prospective abyssal mine field

Citation

Christodoulou, Magdalini; O’Hara, Timothy D; Hugall, Andrew F; Martinez Arbizu, Pedro (2019), Data from: Dark ophiuroid biodiversity in a prospective abyssal mine field, Dryad, Dataset, https://doi.org/10.5061/dryad.h77450k

Abstract

The seafloor contains valuable mineral resources, including polymetallic (or manganese) nodules that form on offshore abyssal plains. The largest and most commercially attractive deposits are located in the Clarion Clipperton Fracture Zone (CCZ), in the eastern Pacific Ocean (EP) between Hawaii and Mexico, where testing of a mineral collection system is set to start soon [1]. The requirement to establish pre-mining environmental management plans has prompted numerous recent biodiversity and DNA barcoding surveys across these remote regions. Here we map DNA sequences from sampled ophiuroids (brittle-stars, including post-larvae) of the CCZ and Peru Basin onto a substantial tree-of-life to show unprecedented levels of abyssal ophiuroid phylogenetic diversity including at least three ancient (>70 my), previously unknown clades. While substantial dark (unobserved) biodiversity has been reported from various microbial meta-barcoding projects [2, 3], our data shows that we have considerably under-estimated the biodiversity of even the most conspicuous mega-faunal invertebrates [4] of the EP abyssal plain.

Usage Notes

Location

Eastern Pacific