Foraminiferal Population Dynamics And Stable Carbon Isotopes

Foraminiferal Population Dynamics And Stable Carbon Isotopes
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有孔虫种群动态和稳定碳同位素

DOI:
10.1007/978-3-642-78737-9_7
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发表时间:
1994
期刊:
影响因子:
56.9
通讯作者:
J. Bijma
J. Bijma
中科院分区:
综合性期刊1区
文献类型:
--
作者:
C. Hemleben;J. Bijma

文献摘要

被引文献

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大多数南极有孔虫生活在透光带内,并表现出与月球周期有关的生活方式。它们在生殖深度(温跃层和/或叶绿素最大值)和透光层的最上部之间迁移。这种个体发育的迁移模式决定了有孔虫壳的初始δ 13 C。最重要的是,生物分馏过程(生命效应)会改变信号。这些过程包括共生体的光合作用和宿主/共生体复合体的呼吸作用。选择Globigerinoides sacculifer(布雷迪)作为有和没有生命效应的深度迁移的函数,模拟贝壳δ 13 C的个体发育变化。
Most planktic foraminifera live within the photic zone and exhibit a life style tied to the lunar cycle. They migrate between the reproductive depth (thermocline and/or the chlorophyll maximum) and the uppermost part of the photic zone. This ontogenetic migration pattern sets the initial δ13C of the foraminiferal shell. On top of that, biological fractionation processes (vital effects) modify the signal. These processes include photosynthetic activity of the symbionts and respiration of the host/symbiont complex. Globigerinoides sacculifer (Brady) was chosen to model ontogenetic changes in the δ13C of the shell as a function of depth migration with and without vital effects.