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首页 > 中国极地考察知识库 > 成果信息库 > 已审查 南极长城湾夏季领鞭毛类的分布和丰度

南极长城湾夏季领鞭毛类的分布和丰度

【标题】南极长城湾夏季领鞭毛类的分布和丰度

【Title】DISTRIBUTION AND ABUNDANCE OF CHOANOFLAGELLATES IN GREAT WALL BAY, KING GEORGE ISLAND, ANTARCTICA IN AUSTRAL SUMMER

【作者】 陈波; 何剑锋

【Author】 Chen Bo ; He Jianfeng

【期刊】极地研究

【Journal】

【期刊年份】1994

【卷】6

【期】

【关键词】 南极; 长城湾; 领鞭毛类; 分布; 丰度

【Keywords】

【摘要】本文分析了长城湾夏季作为异养微型浮游生物主要类群的领鞭毛类(choanoflagelates)的生态分布和丰度。共记述7个属的11个种。领鞭毛类是长城湾夏季的一个丰富的类群,其总丰度在5.1×103-5.3×104细胞/升范围。但其最大丰度和最大叶绿素a浓度不在表层,而分别在20米和30米水层。在垂直丰度上领鞭毛类显现随叶绿素a浓度而增减的趋势。根据对40组数据的回归分析表明:长城湾夏季领鞭毛类总丰度和叶绿素a浓度之间存在着正相关关系。长城湾夏季领鞭毛类四个优势种Bicostaspinifera,Crinolinaaperta,Diaphanoecamultiannulata和Parvicorbiculacircularis广泛地分布于自表到底的各水层中,占各水层领鞭毛类总丰度的90%以上。B.spinifera是表层最丰富的种类,占表层领鞭毛类总丰度平均值的41%。D.multiannu-lata在1991年1月25日的20米水层达到2.2×104细胞/升的单种最大丰度

【Abstract】Eleven species of seven genera of loricate choanoflagellates were found in Great Wall Bay, King George Island, west Antarctica during the sampling period from January 22 to February 8, 1991. Choanoflagellates was an abundant taxa in Great Wall Bay. Their total abundance ranged from 5.1×10 3 to 5.3×10 4cells/l. The spatial distribution of choanoflagellate species and abundance showed heterogeneous patterns. Maximum concentration of chlorophyll a and the highest abundance of choanoflagellates located at the depth of 20m and 30m respectively. Choanoflagellates usually showed a tendency of following the variations of chlorophyll a concentration in their vertical abundance. The regression analysis on the basis of 40 data sets showed that there was a positive correlation between abundance of choanoflagellates and chlorophyll a concentration in this season. The four dominant species of choanoflagellates, Bicosta spinifera,Crinolina aperta, Diaphanoeca multiannulata and Parvicorbicula circularis , distributed widely from surface to bottom in Great Wall Bay.They counted for more than 90% of total choanoflagellates in every layers. B. spinifera was up to about 41% of the mean value of surface abundance of total choanoflagellates. D. multiannulata reached the highest abundance of 2.2×10 4 cells/l at 20m depth on 25 January 1991.

【基金/项目】

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