Sedimentary flux and the formation of resting spores of selected Chaetoceros species at two sites in the southern Benguela System
Sedimentary flux and the formation of resting spores of selected Chaetoceros species at two sites in the southern Benguela System
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本格拉系统南部两个地点的沉积通量和选定角毛藻物种休眠孢子的形成
DOI：
10.2989/025776186784461657
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发表时间：
1986
影响因子：
1.2
通讯作者：
G. Pitcher
中科院分区：
文献类型：
--
作者：
G. Pitcher
1984年12月，在本格拉水系南部的圣赫勒拿湾和伊兰湾放置了2-3天的沉积物收集器。在水柱中，从陷阱和在沉积物/水界面的选定浮游植物物种的丰度比较显示，在选定的物种的下沉行为的差异。这些差异很可能被休眠孢子的形成所夸大。虽然水柱是由营养细胞占主导地位，通量的沉积物主要发生在休眠孢子的形式。结果表明，快速形成和沉淀的休眠孢子从水柱。这些瞬态事件可能会错过典型的现场采样程序，从而低估了孢子形成的频率。高浓度的休眠孢子占主导地位的浮游植物组合的沉积物/水界面，这表明播种孢子从沉积物可能是一个重要因素，导致角毛藻物种的成功和一致的...
Sediment traps were placed in St Helena Bay and Elands Bay in the southern Benguela system in December 1984 for 2–3 days. Comparisons of abundance of selected phytoplankton species in the water column, from the traps and in the sediment/water interface revealed differences in the sinking behaviour of the selected species. These differences are most likely exaggerated by the formation of resting spores. Although the water column was dominated by vegetative cells, the flux to the sediment occurred largely in the form of resting spores. The results suggest rapid formation and settling of resting spores from the water column. These transient events may be missed by typical field sampling procedures, thereby underestimating frequency of spore formation. High concentrations of resting spores dominated the phytoplankton assemblages of the sediment/water interface, suggesting that seeding by spores from the sediment is possibly an important factor resulting in the success of Chaetoceros species and the consistent...