极地研究

极地研究 ›› 1994, Vol. 6 ›› Issue (2): 56-64.

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南极长城湾夏季领鞭毛类的分布和丰度

陈波;何剑锋   

  • 出版日期:1994-06-30 发布日期:1994-06-30

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

  • Online:1994-06-30 Published:1994-06-30

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1201

被引次数

3

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

关键词: 南极,长城湾,领鞭毛类,分布,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.