Approaches and constraints to the reconstruction of palaeoproductivity from Cape Basin abyssal benthic foraminifera (South Atlantic)
Approaches and constraints to the reconstruction of palaeoproductivity from Cape Basin abyssal benthic foraminifera (South Atlantic)
复制标题
开普盆地深海底栖有孔虫(南大西洋)古生产力重建的方法和限制
DOI:
10.1144/jmpaleo2015-045
复制
发表时间:
2016
影响因子:
2
通讯作者:
Diz P
中科院分区:
文献类型:
--
作者:
Diz P
The characteristics of benthic foraminiferal assemblages from well-oxygenated deep-sea settings have been used to reconstruct past productivity conditions. None of the different approaches that have been developed is without complications or applies in all settings. In this study we assess the use of benthic foraminifera (accumulation rates and assemblages composition) as proxies for palaeoproductivity changes during the last glacial period (25 – 95 ka) in an abyssal core located in the south of Cape Basin (41.1 °S, 7.8 °E, 4981 m water depth). Assemblage characteristics indicate a generally food-limited environment receiving episodic inputs of labile organic carbon of variable strength. High seasonality in the delivery of organic material to the seafloor in the form of phytodetritus influences the assemblage characteristics because the corresponding response does not involve the whole community. Benefiting from this occasionally high organic input is the opportunistic speciesEpistominella exigua(Brady) that reproduces rapidly to build up large populations. In general, the rest of the species (i.e. less opportunistic compared toE. exigua) show only subtle variations in their population densities and fauna composition. Under those circumstances benthic foraminiferal accumulation rates seem to be independent of the amount of organic flux arriving at the sediment surface and respond instead to the strength of phytoplankton blooms.
登录
查看更多内容
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
H. Thiel;O. Pfannkuche;G. Schrieber;K. Lochte;A. Gooday;C. Hemleben;R. Mantoura;C. Turley;J. Patching;Franz Riemann
通讯作者:
Franz Riemann
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
A. Mackensen;H. Grobe;G. Kuhn;D. K. Fu¨tterer
通讯作者:
D. K. Fu¨tterer
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
C. Smart;A. Gooday
通讯作者:
A. Gooday
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
P. Froneman;R. Perissinotto;E. Pakhomov
通讯作者:
E. Pakhomov
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
B. Corliss
通讯作者:
B. Corliss