我国东南近岸海域表层沉积硅藻组合

• Published in: Hăiyang dĭzhĭ yu dĭsĭjĭ dĭzhĭ Vol. 32; no. 2; p. 109
• Main Authors: CHEN, Chun, ZHAO Guangtao, CHEN, Min, LAN Binbin, Dongzhao, LAN, FANG Qi
• Format: Journal Article
• Language: Chinese
• Published: Beijing Marine Geology and Quaternary Geology 01.01.2012
• Subjects: Bacillariophyceae; Benthos; Coastal currents; Coastal waters; Diatoms; Distribution; Distribution patterns; Dominant species; Geographical distribution; Marine microorganisms; Plankton; Primary production; Runoff; Sediment; Sediments; Statistical analysis; Statistical methods; Straits; Water depth; Taiwan Strait; South China Sea
• ISSN: 0256-1492
• DOI: 10.3724/SP.J.1140.2012.02109

对采自我国东南近岸海域18个站位78个表层沉积样品进行了硅藻鉴定分析,根据硅藻优势种和次优势种的分布特征,划分出3个组合和两个亚组合,其较好地对应分布于南海、台湾海峡和东海等3个近岸海域。统计数据表明,近岸海域表层沉积硅藻的分布受大陆入海径流的影响微乎其微,随着水深的增加,我国东南近岸海域海洋初级生产力减小,底栖种、潮间带种减少而浮游种增加;组合Ⅰ的分布表明南海东北部海域明显受黑潮流等外洋水团的影响,可应用组合Ⅱ1和组合Ⅱ2中优势种和特征种硅藻来指示水深,两亚组合面貌的差异是对冬夏两季海峡两侧受不同性质海流控制的响应;组合Ⅲ受沿岸流控制比较明显,而遭受黑潮等外洋水团的影响很弱。