Coupled microbial bloom and oxygenation decline recorded by magnetofossils during the Palaeocene-Eocene Thermal Maximum.
Coupled microbial bloom and oxygenation decline recorded by magnetofossils during the Palaeocene-Eocene Thermal Maximum.
复制标题
古新世-始新世最热期间磁化石记录的微生物大量繁殖和氧合作用下降的耦合
DOI:
10.1038/s41467-018-06472-y
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发表时间:
2018-10-01
影响因子:
16.6
通讯作者:
Zhao X
中科院分区:
文献类型:
--
作者:
Chang L;Harrison RJ;Zeng F;Berndt TA;Roberts AP;Heslop D;Zhao X
Understanding marine environmental change and associated biological turnover across the Palaeocene–Eocene Thermal Maximum (PETM; ~56 Ma)—the most pronounced Cenozoic short-term global warming event—is important because of the potential role of the ocean in atmospheric CO2 drawdown, yet proxies for tracing marine productivity and oxygenation across the PETM are limited and results remain controversial. Here we show that a high-resolution record of South Atlantic Ocean bottom water oxygenation can be extracted from exceptionally preserved magnetofossils—the bioinorganic magnetite nanocrystals produced by magnetotactic bacteria (MTB) using a new multiscale environmental magnetic approach. Our results suggest that a transient MTB bloom occurred due to increased nutrient supply. Bottom water oxygenation decreased gradually from the onset to the peak PETM. These observations provide a record of microbial response to the PETM and establish the value of magnetofossils as palaeoenvironmental indicators. Understanding the response of marine productivity and CO2 drawdown to past warming events can provide important insights into the future. Here, the authors use bacterial magnetite nanoparticle fossils to reconstruct nutrient supply and marine deoxygenation during the Palaeocene–Eocene Thermal Maximum.
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DOI:
10.1016/s0031-0182(98)00017-0
发表时间:
1998-08-01
影响因子:
3
作者:
Kelly, DC;Bralower, TJ;Zachos, JC
通讯作者:
Zachos, JC
影响因子:
5.3
作者:
Kobayashi, Atsuko;Kirschvink, Joseph L.;Taguchi, Takahisa
通讯作者:
Taguchi, Takahisa
影响因子:
--
作者:
Kopp, Robert E.;Schumann, Dirk;Vali, Hojatollah
通讯作者:
Vali, Hojatollah
影响因子:
--
作者:
Bralower, TJ
通讯作者:
Bralower, TJ
影响因子:
3.5
作者:
Egli, Ramon;Chen, Amy P.;Horng, Chorng-Shern
通讯作者:
Horng, Chorng-Shern