The distribution of foraminifera living in shallow seas is examined in various environments within Tokyo Bay, in order to provide fundamental data for reconstructing Quaternary paleoenvironments. To clarify characteristics of foraminifer distributions, living foraminifer communities are accurately discriminated from total assemblages including dead specimens by the rose Bengal staining method. Foraminifer distributions are evidently related with the gradients of some factors such as salinity, substratum (sediments and algae), water depth, etc. Foraminifer communities in microhabitats within an inner bay are classified as indicators of unique environments on the basis of the relationship between their distribution and those factors.
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