南海北部及台湾海峡夏季自养与异养区域的分布*

doi:10.11978/j.issn.1009-5470.2014.04.008

Abstract

Abstract:

We investigated the metabolic states of plankton communities in the Taiwan Strait and the northern South China Sea by measuring gross primary productivity (GPP), community respiration (CR) and bacterial production (BP) at 16 stations in these areas. GPP averaged 106.6 mmol O₂ m^-2·d^-1 with a standard error of 7.51 mmol O₂ m^-2·d^-1. CR averaged 131.1 mmol O₂ m^-2·d^-1 with a standard error of 5.95 mmol O₂ m^-2·d^-1. Net community productivity varied from -179.0 to 377.6 mmol O₂ m^-2·d^-1with a median value of -40.4 mmol O₂ m^-2·d^-1. Our results showed that the area affected by Qiongdong upwelling was autotrophic. In the areas affected by the Pearl River discharge, the plankton community was also autotrophic. By contrast, other areas including the Taiwan Strait nearshore waters and the South China Sea open waters were heterotrophic. Therefore, community respiration was not entirely determined by the local primary productivity in the study areas. Our results suggest that the spatial transport of organic carbon plays an important role in determining the metabolic state of the plankton community.

Key words: light and dark bottle method, community respiration, metabolic state

CLC Number:

Q178.53

WANG Na, LIN Wei, CHEN Bing-zhang, HUANG Bang-qin. Metabolic states of the Taiwan Strait and the northern South China Sea in summer 2012[J].Journal of Tropical Oceanography, 2014, 33(4): 61-68.

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Metabolic states of the Taiwan Strait and the northern South China Sea in summer 2012

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