| THE VERTICAL MIGRATION OF DIATOM IN LITTORAL OF XIBIAN AND XIAO'AO |
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| 作者姓名： | 马俊享 金德祥 |
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| 作者单位： | Department of Biology. Xiamen University，Xiamen，Department of Biology. Xiamen University，Xiamen |
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| 摘 要： | The vertical migration of diatoms in mud-flats was studied in littoral of Xibian, Longhai County and Xiao'ao, Lianjiang County, the dominant species being Gyrosigma spencerii and Hantzschia virgata respectively. Both light and tide are important factors affecting the vertical migration of diatoms. With the advent of tide, the diatom community disappears from the surface. It reappears gradually when exposed to light. In the dark, the diatoms never appear in great quantity on the surface in laboratory or in littoral. Whether in the light or in the dark, the diatoms aggregate in maximum numbers in the upper 2 mm of the sediment. But when the tide has covered the sediments for 4 hr, Hantz. virgata penetrates the mud down to a depth of 14 mm, Gy. spencerii, 12 mm. We have found that Gy. spencerii posseses phototaxis, but no tide rhythm and no day-night rhythm in our laboratory.
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| 收稿时间： | 1984/1/19 0:00:00 |
| 修稿时间： | 1984/7/10 0:00:00 |
THE VERTICAL MIGRATION OF DIATOM IN LITTORAL OF XIBIAN AND XIAO'AO |
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| MA JUNXIANG and JIN DEXIANG.THE VERTICAL MIGRATION OF DIATOM IN LITTORAL OF XIBIAN AND XIAO''AO[J].Acta Oceanologica Sinica,1985,4(2):297-303. |
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| Authors: | MA JUNXIANG and JIN DEXIANG |
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| Institution: | Department of Biology, Xiamen University, Xiamen |
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| Abstract: | The vertical migration of diatoms in mud-flats was studied in littoral of Xibian,Longhai County and Xiao'ao,Lianjiang County,the dominant species being Gyrosigma spencerii and Hantzschia virgata respectively.Both light and tide are important factors affecting the vertical migration of diatoms.With the advent of tide,the diatom community disappears from the surface.It reappears gradually when exposed to light.In the dark,the diatoms never appear in great quantity on the surface in laboratory or in littoral.Whether in the light or in the dark,the diatoms aggregate in maximum numbers in the upper 2 mm of the sediment.But when the tide has covered the sediments for 4 hr,Hantz.virgata penetrates the mud down to a depth of 14 mm,Gy.spencerii,12 mm.We have found that Gy.spencerii posseses phototaxis,but no tide rhythm and no day-night rhythm in our laboratory. |
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