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Kersten O, Vetter EW, Jungbluth MJ, et al. Larval assemblages over the abyssal plain in the Pacific are highly diverse and spatially patchy. PeerJ. 2019;7:e7691doi: 10.7717/peerj.7691.
Kersten, O., Vetter, E. W., Jungbluth, M. J., Smith, C. R., & Goetze, E. (2019). Larval assemblages over the abyssal plain in the Pacific are highly diverse and spatially patchy. PeerJ, 7e7691. https://doi.org/10.7717/peerj.7691
Kersten, Oliver, et al. "Larval assemblages over the abyssal plain in the Pacific are highly diverse and spatially patchy." PeerJ vol. 7 (2019): e7691. doi: https://doi.org/10.7717/peerj.7691
Kersten O, Vetter EW, Jungbluth MJ, Smith CR, Goetze E. Larval assemblages over the abyssal plain in the Pacific are highly diverse and spatially patchy. PeerJ. 2019 Sep 26;7:e7691. doi: 10.7717/peerj.7691. eCollection 2019. PMID: 31579593; PMCID: PMC6766376.
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PeerJ. 2019 Sep 26;7:e7691. doi: 10.7717/peerj.7691. eCollection 2019.

Larval assemblages over the abyssal plain in the Pacific are highly diverse and spatially patchy.

PeerJ

Oliver Kersten, Eric W Vetter, Michelle J Jungbluth, Craig R Smith, Erica Goetze

Affiliations

  1. Hawaii Pacific University, Kaneohe, HI, United States of America.
  2. Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, Oslo, Norway.
  3. Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI, United States of America.

PMID: 31579593 PMCID: PMC6766376 DOI: 10.7717/peerj.7691

Abstract

Abyssal plains are among the most biodiverse yet least explored marine ecosystems on our planet, and they are increasingly threatened by human impacts, including future deep seafloor mining. Recovery of abyssal populations from the impacts of polymetallic nodule mining will be partially determined by the availability and dispersal of pelagic larvae leading to benthic recolonization of disturbed areas of the seafloor. Here we use a tree-of-life (TOL) metabarcoding approach to investigate the species richness, diversity, and spatial variability of the larval assemblage at mesoscales across the abyssal seafloor in two mining-claim areas in the eastern Clarion Clipperton Fracture Zone (CCZ; abyssal Pacific). Our approach revealed a previously unknown taxonomic richness within the meroplankton assemblage, detecting larvae from 12 phyla, 23 Classes, 46 Orders, and 65 Families, including a number of taxa not previously reported at abyssal depths or within the Pacific Ocean. A novel suite of parasitic copepods and worms were sampled, from families that are known to associate with other benthic invertebrates or demersal fishes as hosts. Larval assemblages were patchily distributed at the mesoscale, with little similarity in OTUs detected among deployments even within the same 30 × 30 km study area. Our results provide baseline observations on larval diversity prior to polymetallic nodule mining in this region, and emphasize our overwhelming lack of knowledge regarding larvae of the benthic boundary layer in abyssal plain ecosystems.

©2019 Kersten et al.

Keywords: Benthic Boundary Layer (BBL); Clarion Clipperton Fracture Zone (CCZ); Deep sea; Larval dispersal; Metabarcoding; Polymetallic nodule mining

Conflict of interest statement

The authors declare there are no competing interests.

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