Modern Dinoflagellate Cysts Distribution off the Eastern Part of Geoje Island, Korea
Modern Dinoflagellate Cysts Distribution off the Eastern Part of Geoje Island, Korea
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韩国巨济岛东部近海的现代甲藻包囊分布
DOI：
10.1007/bf03020908
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发表时间：
2007
影响因子：
1.3
通讯作者：
K. Matsuoka
中科院分区：
文献类型：
--
作者：
H. Shin;Y. Yoon;K. Matsuoka
研究了韩国Geje岛东部表层沉积物中甲藻孢囊的分布特征及其与环境因素的关系。2004年2月从10个站点采集了水样，2004年2月、5月、9月和11月测量了水温和盐度。共鉴定出甲藻孢囊30个分类群，隶属于19属28种和2个未知种。在这些甲藻中，Brigantediniumspp.其相对比例为23.5%，除St.1站外，其余站位均为最高，其次为泡刺棘藻(8.6%)、斑节刺藻(8.2%)和扁豆(6.7%)。此外，已知的PSP病原菌亚历山大藻(Alexandrium catenella-Tamarensetype)和链状裸藻属(Gymnodium Catenata)的椭圆形包囊浓度较高，锥状斯氏杆菌(Scrippsiella Trochoia)的包囊浓度较低。总体而言，研究区的物种组成与镇海湾和釜山港报道的物种组成相似，几个甲藻包囊反映了富营养化状况。Geje岛东部的包囊分布似乎受到来自西南方向的对马暖流的影响。平均水温2月份为12.0℃，5月份为14.7℃，9月份为20.9℃，11月份为17.2℃，对亚历山大藻最为有利。成长。甲藻孢囊丰度为528~2834个/g干沉积物。济西岛以西地区的沉积物浓度高于其他站位。本区的包囊成分与流入本区的镇海湾和釜山港的包囊成分密切相关。济西岛以西地区的包囊密度较高，可能与环流的形成有关。
Distributional characteristics of dinoflagellate cysts in surface sediments were investigated in relation to environmental factors in the eastern part of Geoje Island, Korea. Samples were collected from 10 stations in February of 2004 and water temperature and salinity were measured in February, May, September and November of 2004. Total 30 taxa of dinoflagellate cysts were identified representing 19 genera, 28 species and 2 unidentified species. Among these dinoflagellate cysts,Brigantediniumspp. of which relative proportion in the total dinoflagellate cysts was 23.5%, was the most abundant at all stations except St. 1, and was followed bySpiniferites bulloideus(8.6%),Lingulodinium machaerophorum(8.2%) andDiplopsalis lenticula(6.7%). In addition, ellipsoidal cysts of the genusAlexandrium(Alexandrium catenella - tamarensetype) andGymnodinium catenatum, known to be causative organisms for PSP, occurred with high concentrations.Scrippsiella trochoideawas also found; however, its cyst concentration was low. Generally, species composition in the study area was similar to these reported from Jinhae Bay and Busan Harbor and several dinoflagellate cysts reflected the eutrophic condition. Cyst distribution in the eastern part of Geoje Island seems to be influenced by the Tsushima Warm Current flowing from the southwest. The mean water temperature was 12.0°C in February, 14.7°C in May, 20.9°C in September and 17.2°C in November, which was most favorable forAlexandriumspp. growth. The abundances of dinoflagellate cysts ranged from 528 to 2,834 cysts/g dry sediment. Higher concentrations were recognized in sediments of west area of the Jisimdo than at other stations. The cyst composition of this area was closely related to these of Jinhae Bay and Busan Harbor from which currents flow into this area. Higher cyst concentration in the west area of Jisimdo might be due to formation of the gyre.