登录 | 注册 | 中文  | English  | 用时: 0.54s
元数据
高级检索
首页 > 中国极地考察知识库 > 成果信息库 > 已审查 南极中山站近岸海冰生态学研究Ⅰ.1992年冰藻生物量的垂直分布及季节变化

南极中山站近岸海冰生态学研究Ⅰ.1992年冰藻生物量的垂直分布及季节变化

【标题】南极中山站近岸海冰生态学研究Ⅰ.1992年冰藻生物量的垂直分布及季节变化

【Title】VERTICAL AND SEASONAL VARIATIONS IN BIOMASS OF ICE ALGAE IN THE VICINITY OF ZHONGSHAN STATION,ANTARCTICA

【作者】 何剑锋; 陈波

【Author】 He Jianfeng ; Chen Bo

【期刊】极地研究

【Journal】

【期刊年份】1995

【卷】7

【期】

【关键词】 南极; 固定冰; 冰藻; 叶绿素a; 季节变化

【Keywords】

【摘要】从1992年4月至12月对东南极中山站近岸当年冰生物量及其环境因子进行了观测。冰底有色层出现在4月下旬和11月下旬,集中于冰底2~3cm,叶绿素a最高含量分别为88.3mg/m3和2810mg/m3,相应的冰藻数量分别为3.5×106和1.21×108个/升。柱总叶绿素a含量的季节性变化极为显著,尤其是以春季的大幅度快速增值为特征,变化范围为1.17~59.7mg/m2,冰藻生物量主要分布在冰底,冬季期间则集中在冰底或冰的中上层。藻类优势种较为单一,秋季优势种为Nitzschialecointei、N.barkleyi和N.cylindrus;春季优势种为Amphiprorakjelmani,Berkeleyarutilans和N.lecointei。中山站近岸冰藻生物量的垂直分布和季节变化以及春季优势种的组成与东南极其它固冰区具有较强的相似性,与亚南极固冰区差异较大。

【Abstract】The ice algae communities at three sites near Zhongshan Station (69°22′24″S,76 °22′40″E),east Antarctica were monitored from April to December 1992. The maximum ice thickness was 1.74m in November and covered snow was less than 30cm in depth through the year. 2 or 3cm brown layers occurred in the bottom ice in later April and November,with highest chlorophyll a values of 88.3 and 2810mg/m 3 respectively,and the comparing cell numbers were 3.5×10 6 and 1.21×10 8cells/l. The maximum integrated chlorophyll a value was 59.7mg/m 2 in November and the values had never exceeded 6mg/m 2 before mid October. Most of the biomass occured in the bottom ice and more than 95 percent of it was concentrated in the bottom 15cm ice layer during ice algae bloom. The dominant diatoms included Nitzschia lecointei,N. barkleyi and N. cylindrus in austral autumn,and Amphiprora kjellmanii,Berkeleya rutilans,Nitzschia lecointei in austral spring,and had some difference depending on the sites and environmental conditions. The results show that the composition of dominant species of ice algae and the biomass in austral spring were similar to that of other fast ice sites in east Antarctica but very different from that of sub Antarctica.

【基金/项目】

【下载】 PDF(344.3 KB)