摘要
格陵兰西部海域35个站点的表层沉积硅藻与月平均海冰覆盖率的典型对应分析(CCA)结果表明:4月、10月和12月平均海冰覆盖率是该海域硅藻分布的主要环境影响因子。根据分析结果得到的属种与站点得分情况,将格陵兰西部海域划分为4个区域:拉布拉多海海冰覆盖率最低,主要分布暖水种;戴维斯海峡多为冷水或极地硅藻分布;北部的巴芬湾海冰种开始大量出现,与该海域12月平均海冰覆盖率较高相关;Disko湾内10月平均海冰覆盖率最高,对应于海冰种、部分极地种和冷水种的高百分含量。
Canonical correspondence analysis（CCA） of diatoms from 35 surface sediment samples and average monthly sea-ice cover values for 12 months shows that April, October and December are the main environmental factors affect- ing diatom distribution off West Greenland. Four diatom assemblages are distinguished based on scores of species and samples on the CCA ordination diagram. The warm water species are mainly found in the Labrador Sea where the va- lue of monthly sea-ice cover is low. Davis Strait is characterized by relatively high proportions of the arctic and cold water species. The sea-ice species become abundant, corresponding to high December sea-ice cover values in Baffin Bay. The high proportions of the sea-ice species, arctic and cold water species coincide with high values of October sea-ice cover in Disko Bugt.
出处
《微体古生物学报》
CSCD
北大核心
2012年第4期321-332,共12页
Acta Micropalaeontologica Sinica
基金
国家自然科学基金项目(40976115
41076038)
2012年度北极海域海洋地质考察(No.CHINARE2012-03-02)共同资助
