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首页> 外文期刊>Journal of oceanography >Contribution of Benthic and Epiphytic Diatoms to Clam and Oyster Production in the Akkeshi-ko Estuary
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Contribution of Benthic and Epiphytic Diatoms to Clam and Oyster Production in the Akkeshi-ko Estuary

机译：季克西湖河口底栖硅藻和附生硅藻对蛤和牡蛎生产的贡献

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摘要

The species composition and dynamics of phytoplankton in the water column and its contribution to clam, Ruditapes philippinarum, and oyster, Crassostrea gigas, production were studied in the Akkeshi-ko estuary, eastern part of Hokkaido, Japan. A total 128 taxa of diatoms were identified, with 103 and 102 species occurring on the surface sediments and in the water column, respectively. Amphora sp., Bacillaria paradoxa var paxilifer, Cocconeis scutellum, Navicula sp., Nitzschia sigma, Paralia sulcata, Rhoicosphenia curvata, Synedra ulna and Thalassiosira sp. were most common and dominant in all stations in both water column and surface sediment. Benthic diatoms were most dominant in both water column and surface sediment. The species composition of epiphytes was, in part, similar to diatom assemblage of the water column and also to that of the surface sediment. The benthic and pelagic ratio in the diatom assemblage of the water column was very high. Benthic diatoms were able to resuspend into water column by turbulence stimulated by wind. Chlorophyll a concentration in the water column increased as wind speed increased. Seventy and 67% of the gut contents oysters consisted of benthic diatoms in 2003 and 2004 and also 78 and 87% of clams in 2003 and 2004, respectively. The availability of benthic and epiphytic diatom assemblages contributes significantly to food resources for clam and oyster mariculture due to resuspension by disturbance in the Akkeshi-ko estuary.
机译：在日本北海道东部的Akkeshi-ko河口研究了水柱中浮游植物的种类组成和动态及其对蛤，菲律宾蛤和牡蛎的影响。总共鉴定出了128个硅藻类群，其中103种和102种分别存在于表层沉积物和水柱中。安菲拉菌，伞形芽孢杆菌变种paxilifer，球藻球菌，纳维库拉菌，尼兹菌属西格玛，帕拉莉亚苏尔卡塔，红景天菌，尺骨Synedra ulna和Thalassiosira sp。在水柱和地表沉积物的所有站点中最常见和占主导地位。底栖硅藻在水柱和地表沉积物中均占主导地位。附生植物的物种组成部分类似于水柱的硅藻组合，也类似于表面沉积物的硅藻组合。水柱的硅藻组件中的底栖和浮游比很高。底栖硅藻能够通过风引起的湍流重悬到水柱中。水柱中叶绿素a的浓度随着风速的增加而增加。 2003年和2004年，牡蛎牡蛎含量分别为70％和67％，底栖硅藻组成，2003年和2004年分别为78％和87％。由于在Akkeshi-ko河口受干扰而重新悬浮，底栖和附生硅藻组合的可利用性极大地促进了蛤和牡蛎海水养殖的食物资源。

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