The last Glacial–Interglacial transition in Patagonia, Argentina: the stable isotope record of bulk sedimentary organic matter from Laguna Potrok Aike
The last Glacial–Interglacial transition in Patagonia, Argentina: the stable isotope record of bulk sedimentary organic matter from Laguna Potrok Aike
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阿根廷巴塔哥尼亚最后一次冰期-间冰期转变:来自拉古纳波特罗克艾克的大量沉积有机质的稳定同位素记录
DOI:
10.1016/j.quascirev.2012.05.025
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发表时间:
2013
影响因子:
4
通讯作者:
the PASADO science team
中科院分区:
文献类型:
--
作者:
Lücke;Wissel;Müller;Ohlendorf;Zolitschka;the PASADO science team
An investigation of stable isotope (δ13CTOC and δ15NTN) and elemental parameters (TOC, TN contents and TOC/TN ratios) of bulk organic matter (<200 μm) from sediment cores recovered from the Patagonian lake Laguna Potrok Aike (Argentina) in the framework of the ICDP deep drilling project PASADO provided insights into past changes in lake primary productivity and environmental conditions in South Patagonia throughout the last Glacial–Interglacial transition. Stratigraphically constrained cluster analyses of all proxy parameters suggest four main phases. From ca 26,100 to 17,300 cal. years BP, lacustrine phytoplankton was presumably the predominant organic matter source in an aquatic environment with low primary productivity rates. At around 17,300 cal. years BP, abrupt and distinct shifts of isotopic and elemental values indicate that the lacustrine system underwent a rapid reorganization. Lake primary productivity (phytoplankton and aquatic macrophytes) shows higher levels albeit with large variations during most of the deglaciation until 13,000 cal. years BP. The main causes for this development can be seen in improved growing conditions for primary producers because of deglacial warming in combination with expedient availability of nutrients and likely calm wind conditions. After 13,000 cal. years BP, decreased δ13CTOCvalues, TOC, TN contents and TOC/TN ratios indicate that the lake approached a new state with reduced primary productivity probably induced by unfavourable growing conditions for primary producers like strengthened winds and reduced nutrient availability. The steady increase in δ15NTNvalues presumably suggests limitation of nitrate supply for growth of primary producers resulting from a nutrient shortage after the preceding phase with high productivity. Nitrate limitation and consequent decreased lacustrine primary productivity continued into the early Holocene (10,970–8400 cal. years BP) as reflected by isotopic and elemental values.
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影响因子:
2.7
作者:
C. Osmond;N. Valaane;S. Haslam;P. Uotila;Z. Roksandic
通讯作者:
C. Osmond;N. Valaane;S. Haslam;P. Uotila;Z. Roksandic
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
T. Guilderson;L. Burckle;S. Hemming;W. Peltier
通讯作者:
W. Peltier
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
B. Zolitschka;F. Schäbitz;A. Lücke;H. Corbella;B. Ercolano;M. Fey;T. Haberzettl;Stephanie Janssen;N. Maidana;C. Mayr;C. Ohlendorf;G. Oliva;M. Paez;G. Schleser;J. Soto;P. Tiberi;M. Wille
通讯作者:
M. Wille
DOI:
10.1016/j.palaeo.2010.08.013
发表时间:
2010-11
期刊:
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子:
--
作者:
V. Markgraf;Ulli M. Huber
通讯作者:
V. Markgraf;Ulli M. Huber
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
J. Paruelo;Adriana B. Beltrán;E. Jobbágy;O. Sala;R. Golluscio
通讯作者:
R. Golluscio