Export flux succession of dinoflagellate cysts and planktonic foraminifera in an active upwelling cell off Cape Blanc (NW Africa)
Export flux succession of dinoflagellate cysts and planktonic foraminifera in an active upwelling cell off Cape Blanc (NW Africa)
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布兰克角（非洲西北部）活跃上升流细胞中甲藻包囊和浮游有孔虫的输出通量连续性
DOI：
10.1080/09670262.2021.1885066
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发表时间：
2021
影响因子：
2.4
通讯作者：
G. Versteegh
中科院分区：
文献类型：
--
作者：
K. Zonneveld;J. Meilland;B. Donner;G. Versteegh
为了更好地了解上部水柱中甲藻孢囊（甲藻孢囊）和浮游有孔虫的生产，演替，脱囊和运输，我们于2018年11月在Cape Blanc（非洲西北部）的活跃上升流中进行了为期7天的调查，并在100米，200米和400米水深处进行了漂流陷阱。调查涵盖了从活跃的上升流到分层条件的变化。在活跃的上升流条件下观察到有机藻囊和浮游有孔虫的产量最高，并在调查结束时急剧下降。钙质棘囊出现在上升流松弛期。在捕集器上方的水柱中（深度<100米）产生了含细胞质（完整）的棘囊和有孔虫。一些空的dinocysts重新悬浮，这意味着沉积物下面的调查网站包含本地和异地的囊肿组合。这是第一次证明，在上层水柱的脱囊是种特异性。Brigantedinium在上层水柱脱囊到达更深的深度之前，而没有观察到的其他甲藻物种的上层水柱脱囊。甲藻和浮游有孔虫协会表现出明显的演替。在上升流活跃期间，其它多甲藻，海胆属，采集了Pentapharsodiniumdalei、“其他光合有机壁甲藻”、Neogloboquadrina incompta和Globigerinellacalida的孢囊。在上升流松弛过程中，产生了Lingulodiniummachaerophorum; microreticulatum，G. catenatum）和有孔虫Globigerina bulloides和Orbulina unitrium。除了提高这些物种的知识，我们的观察允许更详细的重建的上升流的历史，在白朗角地区的基础上，沉积档案，使用allized甲藻和浮游有孔虫组合。
To better understand production, succession, excystment and transport of dinoflagellate cysts (dinocysts) and planktonic foraminifera in the upper water column, we investigated their fluxes during a 7-day survey in the active upwelling off Cape Blanc (NW Africa) in November 2018 with drifting traps at 100 m, 200 m and 400 m water depth. The survey covered a change from active upwelling to stratified conditions. Highest production of organic dinocysts and planktonic foraminifera was observed during active upwelling conditions and decreased drastically towards the end of the survey. Calcareous dinocysts appeared later during upwelling relaxation. Cytoplasm-bearing (full) dinocysts and foraminifera were produced in the water column above the traps (<100 m depth). Some of the empty dinocysts were resuspended, implying that sediments below the survey site contain both local and allochthonous cyst assemblages. This is the first demonstration that excystment in the upper water column is species-specific.Brigantediniumexcysted in the upper water column before reaching deeper depths, whereas no upper water column excystment was observed for the other dinoflagellate species.Dinoflagellate and planktonic foraminifera associations showed a clear succession. During active upwelling,Echinidinium zonneveldiae,Brigantediniumspp., other peridinioids,Echinidiniumspp., cysts ofPentapharsodinium dalei, ‘other photosynthetic organic-walled dinocysts‘,Neogloboquadrina incomptaandGlobigerinella calidawere collected. During upwelling relaxation,Lingulodinium machaerophorumwas produced; and under stratified conditions Gymnodiniaceae cysts (G. microreticulatum,G. catenatum) and the foraminiferaGlobigerina bulloidesandOrbulina universawere sampled. Apart from enhancing knowledge of these species, our observations allow more detailed reconstructions of upwelling history in the Cape Blanc region based on sedimentary archives using fossilized dinoflagellate and planktonic foraminifera assemblages.
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影响因子：
4.5
作者：
Bravo I;Figueroa RI
通讯作者：
Figueroa RI
DOI：
10.1016/0198-0254(85)94028-2
发表时间：
2009
期刊：
--
影响因子：
--
作者：
M.
通讯作者：
M.
DOI：
10.1016/j.dsr.2014.01.007
发表时间：
2014-04-01
影响因子：
2.4
作者：
Cropper, Thomas E.;Hanna, Edward;Bigg, Grant R.
通讯作者：
Bigg, Grant R.
使用甲藻包囊来区分过去两个世纪以来波河排放羽流的营养状态中人为引起的变化和自然变化。
影响因子：
5.8
作者：
K. Zonneveld;Liang Chen;Rehab Elshanawany;H. Fischer;Mirja Hoins;M. I. Ibrahim;D. Pittauerová;G. Versteegh
通讯作者：
G. Versteegh
阿拉伯海西北部索马里盆地有机壁甲藻包囊的（古）生态意义、运输和保存
DOI：
10.1016/s0967-0645(00)00023-0
发表时间：
2000
影响因子：
3
作者：
K. Zonneveld;G. Brummer
通讯作者：
G. Brummer