On the use of benthic foraminiferal δ13C in palaeoceanography: constraints from primary proxy relationships
On the use of benthic foraminiferal δ13C in palaeoceanography: constraints from primary proxy relationships
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关于古海洋学中底栖有孔虫 Ύ´13C 的使用:主要代理关系的限制
DOI:
10.1144/sp303.9
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Mackensen
中科院分区:
文献类型:
--
作者:
Mackensen
Recent findings are reviewed from observations in the field on the generation of the δ 13 C signal in shells of live (Rose Bengal stained) benthic foraminifera, and end up with implications for the interpretation of fossil signatures. The δ 13 C values of calcite tests of preferentially epifaunal foraminifera principally reflect the δ 13 C of dissolved inorganic carbon (DIC) of ambient seawater, whereas infaunal species record a porewater signal, both with an offset from equilibrium calcite. Species occupying the deepest average living depth in the sediment usually exhibit lowest δ 13 C test values, but δ 13 C values of conspecific specimens at a single site do not decrease with increasing subbottom depth and decreasing porewater δ 13 C DIC. Organic carbon fluxes to the sediment surface are generally reflected by infaunal species such that lowered δ 13 C values coincide with high fluxes, but even strictly epifaunal species may reflect seasonally pulsed phytodetritus supply by depleted test δ 13 C. In high-productivity environments, however, where dissolved oxygen and sedimentary carbonate contents are low, benthic foraminiferal tests show 13 C enrichment probably due to carbonate-ion undersaturation. Ontogenetic increase in δ 13 C values of certain infaunal species suggests a slow-down of metabolic rates during test growth and decreasing fractionation with age. At sites of active methane discharge δ 13 C values of infaunal species reflect low pore water δ 13 C DIC values, documenting active methane release in the sediment, whereas lowered δ 13 C values of strictly epifaunal species are most probably the result of incorporation of 13 C depleted methanotrophic biomass.
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DOI:
10.1007/978-3-642-58646-0_21
发表时间:
1999
影响因子:
1.2
作者:
D. Lea;J. Bijma;H. Spero;D. Archer
通讯作者:
D. Archer
影响因子:
1.9
作者:
J. Holsten;L. Stott;W. Berelson
通讯作者:
W. Berelson
DOI:
10.1016/0031-0182(84)90100-7
发表时间:
1984
期刊:
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子:
--
作者:
E. Grossman
通讯作者:
E. Grossman
影响因子:
3.9
作者:
A. Mackensen;M. Rudolph;G. Kuhn
通讯作者:
G. Kuhn
影响因子:
2.5
作者:
BERNHARD, JM;BOWSER, SS
通讯作者:
BOWSER, SS