Abstract：
:Bottom hypoxia (dissolved oxygen concentration ≤2 ml l(-1)) from anthropogenic eutrophication is a growing global concern. Here, we summarized characteristics of hypoxia and its effects on benthic organisms in Tokyo Bay. Despite recent decreases in nutrient inputs, hypoxia has been increasing in duration and spatial extent, suggesting that the substantial loss of tidal flats from reclamation is contributing to a decrease in the ability of Tokyo Bay to recycle nutrients. Hypoxia develops in the central to northern part of the bay and persists from spring to autumn, causing defaunation of benthic organisms. After the abatement of hypoxia in autumn, the defaunated area is recolonized, either through migration or larval settlement. Some megabenthic species with a spawning peak in spring and summer experience failure of larval settlement, which is probably due to hypoxia. The adverse effects of hypoxia are an impediment to recovery of benthic organisms in Tokyo Bay.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Kodama K,Horiguchi Tdoi
10.1016/j.marpolbul.2011.04.022subject
Has Abstractpub_date
2011-01-01 00:00:00pages
215-20issue
5-12eissn
0025-326Xissn
1879-3363pii
S0025-326X(11)00224-4journal_volume
63pub_type
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