Expansion of oxygen minimum zones may reduce available habitat for tropical pelagic fishes.

Stramma, Lothar , Prince, Eric D., Schmidtko, Sunke , Luo, Jiangang, Hoolihan, John P., Visbeck, Martin , Wallace, Douglas W.R., Brandt, Peter and Körtzinger, Arne (2012) Expansion of oxygen minimum zones may reduce available habitat for tropical pelagic fishes. Nature Climate Change, 2 (1). pp. 33-37. DOI 10.1038/NCLIMATE1304.

[img] Text
nclimate1304-s1.pdf - Supplemental Material
Restricted to Registered users only

Download (418Kb) | Contact
[img]
Preview
Text
Stramma.pdf - Accepted Version

Download (3688Kb)
[img] Text
Stramma.pdf - Published Version
Restricted to Registered users only

Download (797Kb) | Contact

Supplementary data:

Abstract

Climate model predictions1, 2 and observations3, 4 reveal regional declines in oceanic dissolved oxygen, which are probably influenced by global warming5. Studies indicate ongoing dissolved oxygen depletion and vertical expansion of the oxygen minimum zone (OMZ) in the tropical northeast Atlantic Ocean6, 7. OMZ shoaling may restrict the usable habitat of billfishes and tunas to a narrow surface layer8, 9. We report a decrease in the upper ocean layer exceeding 3.5 ml l−1 dissolved oxygen at a rate of ≤1 m yr−1 in the tropical northeast Atlantic (0–25° N, 12–30° W), amounting to an annual habitat loss of ~5.95×1013 m3, or 15% for the period 1960–2010. Habitat compression and associated potential habitat loss was validated using electronic tagging data from 47 blue marlin. This phenomenon increases vulnerability to surface fishing gear for billfishes and tunas8, 9, and may be associated with a 10–50% worldwide decline of pelagic predator diversity10. Further expansion of the Atlantic OMZ along with overfishing may threaten the sustainability of these valuable pelagic fisheries and marine ecosystems.

Document Type: Article
Keywords: Physical Oceanography; Marine chemistry; oxygen minimum zones, habitat reduction, blue marlin; oceanography; behaviour; biodiversity; ecosystems
Research affiliation: OceanRep > SFB 754 > A5
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
OceanRep > SFB 754 > A4
OceanRep > SFB 754 > A3
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
OceanRep > SFB 754
Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1038/NCLIMATE1304
ISSN: 1758-678X
Projects: CVOO, SFB754, Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 22 Dec 2011 11:05
Last Modified: 24 Feb 2017 11:40
URI: http://oceanrep.geomar.de/id/eprint/13127

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...