Monterey Bay Phytoplankton. II. Resting Spore Cycles in Coastal Diatom Populations

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Abstract
The distribution of planktonic copepods in the Adriatic Sea has been analyzed on the basis of 132 samples collected at 35 fixed stations during 4 seasonal cruises. A total of 127 species have been determined and 3 characteristic copepod communities have been identified. The distribution of copepod species has been found to reflect the dual physiognomy of the Adriatic. The shallow northern section is characterized by high density values, low species diversity, and the dominance of species belonging to the estuarine and coastal communities. The relatively deep waters of the southern section are characterized by low density values, high species diversity, and the presence of many species belonging to the upper, middle, and lower zones of the oceanic community. Temporal variations in the horizontal spread of these 3 communities are discussed in relation to seasonal cycles in abundance, vertical migration patterns, and the current regime in the Adriatic.

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