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Some Ecological Effects of Rainfall on the Protoplankton of South West Arm

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Part of the Lecture Notes on Coastal and Estuarine Studies book series (COASTAL, volume 3)

Summary

Changes in ecological parameters affecting protoplankton in South West Arm of Port Hacking (Sydney region, Australia) were followed over a 94 day period during which several major rainstorms occurred. The precipitation pattern resulted in the formation of a double pycnocline and virtual isolation of the bottom water. A monospecific bloom of Ceratium furca developed in close association with the lower pycnocline. It is suggested that this population may have been utilizing the eutrophic water immediately below for a nutrient supply and the euphotic water above for energy. An unidentified green pigment accumulated in the deep basin during anaerobic periods. Toward the end of the 94 day period South West Arm returned to the normal marine condition with a completely mixed water column and with about the same amount and diversity of standing stock of protoplankton as at the beginning.

Key words

estuaries protoplankton bloom rain stratification anaerobic conditions Port Hacking South West Arm 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1983

Authors and Affiliations

  1. 1.Division of Fisheries ResearchCSIRO Marine LaboratoriesCronullaAustralia

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