Responses of LAI to rainfall explain contrasting sensitivities to carbon uptake between forest and non-forest ecosystems in Australia

Li, L; Wang, YP; Beringer, J; Shi, H; Cleverly, J; Cheng, L; Eamus, D; Huete, A; Hutley, L; Lu, X; Piao, S; Zhang, L; Zhang, Y; Yu, Q

Responses of LAI to rainfall explain contrasting sensitivities to carbon uptake between forest and non-forest ecosystems in Australia

Li, L

Wang, YP Beringer, J Shi, H Cleverly, J

Cheng, L Eamus, D

Huete, A

Hutley, L Lu, X Piao, S Zhang, L

Zhang, Y Yu, Q

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Publication Type:: Journal Article
Citation:: Scientific Reports, 2017, 7 (1)
Issue Date:: 2017-12-01

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Field	Value	Language
dc.contributor.author	Li, L https://orcid.org/0000-0001-9983-6681	en_US
dc.contributor.author	Wang, YP	en_US
dc.contributor.author	Beringer, J	en_US
dc.contributor.author	Shi, H	en_US
dc.contributor.author	Cleverly, J https://orcid.org/0000-0002-2731-7150	en_US
dc.contributor.author	Cheng, L	en_US
dc.contributor.author	Eamus, D https://orcid.org/0000-0003-2765-8040	en_US
dc.contributor.author	Huete, A https://orcid.org/0000-0003-2809-2376	en_US
dc.contributor.author	Hutley, L	en_US
dc.contributor.author	Lu, X	en_US
dc.contributor.author	Piao, S	en_US
dc.contributor.author	Zhang, L https://orcid.org/0000-0002-0442-5730	en_US
dc.contributor.author	Zhang, Y	en_US
dc.contributor.author	Yu, Q https://orcid.org/0000-0001-6950-1821	en_US
dc.date.available	2017-08-11	en_US
dc.date.issued	2017-12-01	en_US
dc.identifier.citation	Scientific Reports, 2017, 7 (1)	en_US
dc.identifier.uri	http://hdl.handle.net/10453/121565
dc.description.abstract	© 2017 The Author(s). Non-forest ecosystems (predominant in semi-arid and arid regions) contribute significantly to the increasing trend and interannual variation of land carbon uptake over the last three decades, yet the mechanisms are poorly understood. By analysing the flux measurements from 23 ecosystems in Australia, we found the the correlation between gross primary production (GPP) and ecosystem respiration (Re) was significant for non-forest ecosystems, but was not for forests. In non-forest ecosystems, both GPP and Re increased with rainfall, and, consequently net ecosystem production (NEP) increased with rainfall. In forest ecosystems, GPP and Re were insensitive to rainfall. Furthermore sensitivity of GPP to rainfall was dominated by the rainfall-driven variation of LAI rather GPP per unit LAI in non-forest ecosystems, which was not correctly reproduced by current land models, indicating that the mechanisms underlying the response of LAI to rainfall should be targeted for future model development.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP140102698
dc.relation	http://purl.org/au-research/grants/arc/DE120103022
dc.relation	http://purl.org/au-research/grants/arc/DP130101566
dc.relation.ispartof	Scientific Reports	en_US
dc.relation.isbasedon	10.1038/s41598-017-11063-w	en_US
dc.subject.mesh	Plant Leaves	en_US
dc.subject.mesh	Carbon	en_US
dc.subject.mesh	Ecosystem	en_US
dc.subject.mesh	Rain	en_US
dc.subject.mesh	Models, Biological	en_US
dc.subject.mesh	Australia	en_US
dc.subject.mesh	Carbon Cycle	en_US
dc.subject.mesh	Forests	en_US
dc.subject.mesh	Grassland	en_US
dc.title	Responses of LAI to rainfall explain contrasting sensitivities to carbon uptake between forest and non-forest ecosystems in Australia	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	7	en_US
utslib.for	0401 Atmospheric Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CAMGIS - Centre for Advanced Modelling and Geospatial lnformation Systems
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	open_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	7	en_US

Abstract:

© 2017 The Author(s). Non-forest ecosystems (predominant in semi-arid and arid regions) contribute significantly to the increasing trend and interannual variation of land carbon uptake over the last three decades, yet the mechanisms are poorly understood. By analysing the flux measurements from 23 ecosystems in Australia, we found the the correlation between gross primary production (GPP) and ecosystem respiration (Re) was significant for non-forest ecosystems, but was not for forests. In non-forest ecosystems, both GPP and Re increased with rainfall, and, consequently net ecosystem production (NEP) increased with rainfall. In forest ecosystems, GPP and Re were insensitive to rainfall. Furthermore sensitivity of GPP to rainfall was dominated by the rainfall-driven variation of LAI rather GPP per unit LAI in non-forest ecosystems, which was not correctly reproduced by current land models, indicating that the mechanisms underlying the response of LAI to rainfall should be targeted for future model development.

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http://hdl.handle.net/10453/121565