Autumn community structure in the shallow mixed layer of the subtropical South China Sea reveals a peculiar copepod and zooplankton assemblage

Abstract

The South China Sea is the world's largest marginal sea. To understand the zooplankton community structure during monsoon transition period we investigated the copepod composition, abundance and distribution at six stations along a transect line in the subtropical South China Sea during the autumn of 1999. In the present study, 22 major zooplankton taxa were found, with Noctilucales, calanoid copepods and poecilostomatoid copepods being the most abundant of the overall zooplankton counts. We identified a total of 37 copepod species, in 25 genera, belonging to 19 families. The numerically most dominant genera were Paracalanus, Calocalanus and Oncaea. Communities of zooplankton and copepods of the northern South China Sea demonstrated varied spatial distributions during the investigated period. The present study provides the composition of zooplankton and copepod community structures in the shallow mixed layer of the subtropical South China Sea during the northeast monsoon transition period.

Keywords:

• copepod
• zooplankton
• community structure
• distribution
• South China Sea

Acknowledgements

We are grateful for the financial support from the National Science Council (NSC) of Taiwan, via projects NSC-95-2621-B-019-005; NSC-95-2611-M-019-003; NSC-96-2611-M-019-0006; NSC-97-2611-M-019-004; NSC 100-2611-M-019-010; and CMBB-97529002A9 to J.S. Hwang. We acknowledge the assistance provided by the captain and crew of Ocean Research Vessel III. We thank S.C. Wong and C.Z. Chen for technical help during the sampling campaigns. We also wish to acknowledge NSC for granting fund to L.C. Tseng to attend 11^th ICOC by projects NSC 100-2811-M-019-004.

Notes

^†Both authors contributed equally to this article.