复州湾表层沉积硅藻的组合特征

发布时间：2018-01-21 03:59

本文关键词： 海洋生物学硅藻分析内湾河口沿岸流复州湾　出处：《应用海洋学学报》2017年02期 　论文类型：期刊论文

【摘要】：通过对复州湾内湾附近8个不同深度的海底表层沉积物做硅藻分析、种群优势度进行计算,查明复州湾表层沉积硅藻的优势种主要包括Paralia sulcata、Coscinodiscus radiatus、C.excentrcus和Rhaphoneis surirella等9种.且优势度最高的3种硅藻P.sulcata、C.radiatus和C.excentrcus均为内湾指标种,与样品采集点的地貌位置相吻合.根据硅藻咸水种、半咸水种、淡水种占比的水平分布特征,对不同样品的硅藻组合、所处地貌位置与样品粒度的关系以及硅藻鉴定结果的聚类分析等进行了探讨.初步判明复州湾表层硅藻的组合主要受到夏季辽东湾向西南方向流动的沿岸流以及复州河与红沿河的河流的影响,另外不同的地貌部位和距离河口的远近也对硅藻组合产生较为明显的影响.
[Abstract]:Diatom analysis was carried out on the surface sediments of 8 different depths near the Bay of Fuzhou Bay, and the population dominance was calculated. The dominant species of diatoms in the surface layer of Fuzhou Bay include Paralia sulcata Coscinodiscus radiatus. Nine species of C. excentrcus and Rhaphoneis surirella, and three species of diatom P.sulcata with the highest dominance. Both C. radiatus and C. excentrcus are indicators of the inner bay, which are consistent with the geomorphologic location of the sampling points. According to the diatom salt water species, the half-salt water species. The horizontal distribution characteristics of freshwater species, diatom combinations for different samples. The relationship between geomorphologic location and sample granularity and cluster analysis of diatom identification results were discussed. It was preliminarily determined that the assemblage of surface diatoms in Fuzhou Bay was mainly due to the coastal currents flowing southwestward in Liaodong Bay in summer. The influence of Fuzhou River and Red Rivers. In addition, the diatom assemblage is influenced by different geomorphologic position and distance from estuary.
【作者单位】：天津师范大学城市与环境科学学院;中国地质调查局天津地调中心;中国地质调查局沈阳地质调查中心;中国地质大学(北京)海洋学院;天津师范大学水资源与水环境重点实验室;
【基金】：天津师范大学博士基金资助项目(52XB1207) 天津市水资源与水环境重点实验室开放基金资助项目(52XS1204) 天津市高等学校“创新团队培养计划”资助项目(TD12-5037)
【分类号】：P736.21;Q949.2
【正文快照】： (1.天津师范大学城市与环境科学学院,天津300378;2.中国地质调查局天津地调中心,天津300170;3.中国地质调查局沈阳地质调查中心,辽宁沈阳110034;4.中国地质大学(北京)海洋学院,北京100183;5.天津师范大学水资源与水环境重点实验室,天津300387)硅藻分析是国内外重建古海岸平原

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