期刊
ANNUAL REVIEW OF MARINE SCIENCE, VOL 5
卷 5, 期 -, 页码 393-420出版社
ANNUAL REVIEWS
DOI: 10.1146/annurev-marine-120710-100849
关键词
hypoxia; ecology; oceans; microbial; mesopelagic; fisheries
资金
- Division Of Ocean Sciences [0850839] Funding Source: National Science Foundation
Long-term declines in oxygen concentrations are evident throughout much of the ocean interior and are particularly acute in midwater oxygen minimum zones (OMZs). These regions are defined by extremely low oxygen concentrations (<20-45 mu mol kg(-1)), cover wide expanses of the ocean, and are associated with productive oceanic and coastal regions. OMZs have expanded over the past 50 years, and this expansion is predicted to continue as the climate warms worldwide. Shoaling of the upper boundaries of the OMZs accompanies OMZ expansion, and decreased oxygen at shallower depths can affect all marine organisms through multiple direct and indirect mechanisms. Effects include altered microbial processes that produce and consume key nutrients and gases, changes in predator-prey dynamics, and shifts in the abundance and accessibility of commercially fished species. Although many species will be negatively affected by these effects, others may expand their range or exploit new niches. OMZ shoaling is thus likely to have major and far-reaching consequences.
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