南海中南部溶解态铝初探: 促进甲藻生长？

doi:10.11978/j.issn.1009-5470.2014.02.011

Abstract

Abstract: Based on the cruise in the central and southern South China Sea from November 28^th, 2011 to January 12^th, 2012, the characteristics of dissolved aluminum distribution and its correlation with phytoplankton community structure were presented in this paper. The data included 78 dissolved Al samples at 25 stations between 5 and 18°N. The average value of dissolved Al in the surface water was 138.3±39.1 nmol·L^-1, showing a horizontal distribution with high concentration in the continental shelf water and low concentration in the open sea and around islands and reefs. In the surface water samples, we identified 132 phytoplankton species belonging to 57 genera, including Bacillariophyta, Pyrrophyta and Cyanophyta. Phytoplankton biomass fluctuated from 0.75×10³to 21.09×10³ cell·dm^-3and showed a significant positive correlation with dissolved Al (n=22, r=0.55, p<0.01). Dissolved Al showed obvious variation from the surface to 100 m in the vertical profiles, but little change from 100 to 300 m. No strong analogy between dissolved Al and nutrients was observed at two vertical profiles. However, dissolved Al exhibited a significant positive correlation with chlorophyll a (n=16, r=0.58, p<0.05), the total abundance of phytoplankton (n=16, r=0.59, p<0.05), and the Pyrrophyta abundance (n=15, r=0.69, p<0.01), which indicates that the dissolved Al may have stimulated Pyrrophyta’s growth in the central and southern South China Sea in winter.

Key words: dissolved aluminum, distribution, Pyrrophyta, South China Sea

CLC Number:

P735

WANG Qiong, TAN Ye-hui, ZHOU Lin-bin, KE Zhi-xin, HUANG Liang-min. Research on dissolved aluminum in the central and southern South China Sea: Can aluminum stimulate Pyrrophyta’s growth？[J].Journal of Tropical Oceanography, 2014, 33(2): 78-86.

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Research on dissolved aluminum in the central and southern South China Sea: Can aluminum stimulate Pyrrophyta’s growth？

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