Continuous aridification since the mid‐Holocene as the main cause of C3/C4 dynamics in the grasslands of northeastern China
dc.contributor.author
Li, Nannan
dc.contributor.author
Xie, Manman
dc.contributor.author
Sack, Dorothy
dc.contributor.author
Dubois, Nathalie
dc.contributor.author
Yang, Xiuyun
dc.contributor.author
Gao, Guizai
dc.contributor.author
Li, Dehui
dc.contributor.author
Liu, Lidan
dc.contributor.author
Liu, Hongyan
dc.contributor.author
Leng, Chengcheng
dc.contributor.author
Wang, Jiangyong
dc.contributor.author
Liu, Baojian
dc.contributor.author
Jie, Dongmei
dc.date.accessioned
2021-01-08T13:43:00Z
dc.date.available
2020-05-06T02:37:15Z
dc.date.available
2020-05-06T09:32:49Z
dc.date.available
2021-01-08T13:43:00Z
dc.date.issued
2021-01
dc.identifier.issn
1351-0754
dc.identifier.issn
1365-2389
dc.identifier.other
10.1111/ejss.12960
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/413238
dc.description.abstract
Ecological responses to past climate change as determined from palaeorecords offer insights into responses that may accompany future climate change. In arid and semi‐arid lands, the interactions between regional vegetation and climate change are not yet well understood, partly due to a lack of suitable palaeovegetation proxies that can provide accurate and continuous tracers for past vegetation dynamics. To gain a better understanding of long‐term vegetation dynamics, this study employs a multiproxy approach applied to sand‐palaeosol sediments of northeastern China's Songnen grasslands. Phytolith analyses and data on the stable carbon isotope composition (δ13C) of organic matter are used to reconstruct palaeovegetation composition, namely, the changing abundance of C3 and C4 species, whereas a geochemical weathering index (Fed/Fet ratios) tracks past East Asian summer monsoon (EASM) intensity. The phytolith assemblages and indices and δ13C of the soil indicate that C4 species' abundance has been increasing in the Songnen grasslands since the mid‐Holocene, although C3 vegetation is still dominant. Statistically significant negative correlations between the δ13C data and Fet/Fed ratios suggest that continuous weakening of the EASM since the mid‐Holocene may be responsible for the 13C‐enrichment of the sediments in the Songnen grasslands. Field vegetation surveys, modern topsoil phytoliths and δ13C calibration data indicate that the expansion of C4 species since the mid‐Holocene is mainly due to their ability to cope with aridity when growing season temperature is not undergoing a significant decrease. Future precipitation decreases in arid and semi‐arid lands should make C4 species more competitive in the grasslands of northeastern China.
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley
en_US
dc.subject
C3/C4 vegetation
en_US
dc.subject
East Asian summer monsoon
en_US
dc.subject
Grasslands
en_US
dc.subject
Mid-Holocene
en_US
dc.subject
Northeastern China
en_US
dc.subject
Phytolith
en_US
dc.title
Continuous aridification since the mid‐Holocene as the main cause of C3/C4 dynamics in the grasslands of northeastern China
en_US
dc.type
Journal Article
dc.date.published
2020-03-16
ethz.journal.title
European Journal of Soil Science
ethz.journal.volume
72
en_US
ethz.journal.issue
1
en_US
ethz.journal.abbreviated
Eur. J. Soil Sci.
ethz.pages.start
356
en_US
ethz.pages.end
371
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::09596 - Dubois, Nathalie (ehemalig) / Dubois, Nathalie (former)
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::09596 - Dubois, Nathalie (ehemalig) / Dubois, Nathalie (former)
ethz.date.deposited
2020-05-06T02:37:19Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-01-08T13:43:08Z
ethz.rosetta.lastUpdated
2023-02-06T21:14:37Z
ethz.rosetta.versionExported
true
ethz.COinS
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