A quantitative analysis of coccoliths is presented in 18 core-top samples ranging between 26° N and 21° N and covering two major deep brine pools in the northern part of the Red Sea. Non-brine sites are characterized by rich coccoliths that may reach up to 3.31 × 10⁹ coccoliths/g made by 22 species, whereas brine sites of Shaban and Kebrit Deeps with additional two non-brine sites are characterized by a decline in coccoliths/g (3.25 × 10⁸ coccoliths/g), Shannon diversity, CaCO₃ (%), and high TOC (%). Carbonate dissolution, inferred by qualitative observation and quantitative indices, was only observed at one brine site GeoB7828 in Kebrit Deep. This suggests that the decline in coccolith assemblages may not entirely be attributed to carbonate dissolution. The major decline, however, is probably related to the suspension of fecal pellets and marine aggregates containing delicate coccolith shields within a nepheloid layer and subsequently grazed by zooplankters in which reduced the numbers of coccolith that reached the bottom of the brine sites, or alternatively a deep-sea flow current that carried and remobilized some suspended particles outside the brine pool. Latitudinal fluctuations of eutrophic/oligotrophic coccoliths suggest profound trophic changes in the photic zone in the northern part of the Red Sea. C. braarudii, a valuable nutrient-indicator species is here reported for the first time, along with G. oceanica, H. carteri as well as biogenic opal dominating the assemblage between 26° N and 24° N, suggesting elevated nutrient conditions and supporting recent high chl-a records, whereas areas between 21° N and 23° N lie under oligotrophic conditions due to the presence of U. sibogae, U. tenuis, R. clavigera, F. profunda, and S. pulchra.

在18个岩心顶部样品中对椰油进行了定量分析，样品范围在26°N和21°N之间，覆盖了红海北部的两个主要深层盐水池。非盐水点的特征是富含丰富的可可脂，可能高达 22种产生的3.31×10 ⁹可可脂/克，而Shaban和Kebrit Deeps的盐水位点以及另外两个非盐水可被表征为低可可脂/ g。 （3.25×10 ⁸  coccoliths / g），香农多样性，CaCO ₃（％）和高TOC（％）。通过定性观察和定量指标推断出的碳酸盐溶解仅在凯布里特深水的一个卤水站点GeoB7828上观察到。这表明可可石组合的下降可能不完全归因于碳酸盐的溶解。然而，主要的下降可能与粪便颗粒和海藻骨料的悬浮物（含细小球藻盾）悬浮在星云层中，随后被浮游动物吃草，从而减少了到达盐水部位底部的球藻的数量，或者深海水流将一些悬浮颗粒带走并迁移到盐水池外。富营养化/寡营养化卵石的纬度波动表明，红海北部的光合带营养发生了深远的变化。在这里首次报道了C. braarudii，一种有价值的营养指示物物种，同时还报道了G. oceanica，H。Carteri以及在26°N和24°N之间占主导地位的生物蛋白石，这表明营养条件和支持水平升高近期高chl-一个记录，而贫营养条件下的地区和23之间21°N°N谎言由于存在U. sibogae，U.细叶，R. clavigera，F.股深，和S.普撤拉。