Short-term fluctuations in benthic diatom numbers on an intertidal sandflat in the Westerschelde estuary (Zeeland, The Netherlands)
Short-term fluctuations in benthic diatom numbers on an intertidal sandflat in the Westerschelde estuary (Zeeland, The Netherlands)
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DOI：
10.1007/bf00028026
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发表时间：
1993-10
期刊：
影响因子：
2.6
通讯作者：
K. Sabbe
中科院分区：
文献类型：
--
作者：
K. Sabbe
1991年3月至5月期间，在Westschelde河口微咸水部分的一个潮间带站每两天或三天采集一次沉积物样本。为了研究硅藻数量和组合结构的短期时间变化，进行了定量的细胞计数，在整个采样期内，硅藻组合以表生硅藻为主。在所统计的所有瓣片中，Achnanths delicatula、Opephoracf.perminuta.和Catenula adhaerenson平均占67%。表层硅藻的绝对数没有明显变化，种类组成相对稳定。相反，表层硅藻密度在研究结束时显著增加。这一组分中的物种组成不太稳定。多变量分析(主成分分析)和多元回归分析表明，总的天空照度(采样前第二天和第三天)和有机质含量与表层硅藻含量的短期波动有关。
During the period March–May 1991, sediment samples were taken every two or three days at one intertidal station in the brackish part of the Westerschelde estuary. Quantitative cell counts were made in order to investigate the short-term temporal changes in diatom numbers and assemblage structure.Throughout the whole sampling period, the diatom assemblage was dominated by epipsammic diatoms. Three species,Achnanthes delicatula, Opephoracf.perminutaandCatenula adhaerenson average accounted for almost 67% of all valves counted. The epipsammic diatom fraction showed no significant changes in absolute numbers; its species composition appeared relatively stable. In contrast, epipelic diatom densities significantly increased towards the end of the study period. Species composition within this fraction was less stable. Multivariate analysis (Principal Components Analysis), in combination with multiple regression, indicated that total sky irradiance (on the second and third day preceding sampling) and percentage organic matter were related to the short-term fluctuations of the epipelic diatom fraction.