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. 2012 Nov 15;2(12):3242–3268. doi: 10.1002/ece3.425

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© 2012 Published by Blackwell Publishing Ltd.

Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.

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Long-term downcore trends of microfossil abundance in representative regions from which high-resolution records are available. (A) Osaka Bay foraminiferal (Tsujimoto et al. 2008) and (B) Osaka Bay ostracod (Yasuhara et al. 2007) records (OBY, OS3, OS4 and OS5: sediment core sites; cores OBY and OS3 were taken from inner part and cores OS4 and OS5 were taken from middle part of the bay) and (C) Chesapeake Bay diatom records (Cooper 1995) (R4-30, R4-45, R4-50, and 50-E: sediment core sites). In Osaka Bay, ostracode abundance decreases in the inner part of the bay but increases in the central part of the bay, because Osaka Bay hypoxia is restricted in the inner part of the bay (see Overview of Regional Trends section for mechanism of abundance change).