Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems

Junjiong Shao; Xuhui Zhou; Yiqi Luo; Bo Li; Mika Aurela; David Billesbach; Peter D. Blanken; Rosvel Bracho; Jiquan Chen; Marc Fischer; Yuling Fu; Lianhong Gu; Shijie Han; Yongtao He; Thomas Kolb; Yingnian Li; Zoltan Nagy; Shuli Niu; Walter C. Oechel; Krisztina Pinter; Peili Shi; Andrew Suyker; Margaret Torn; Andrej Varlagin; Huimin Wang; Junhua Yan; Guirui Yu; Junhui Zhang

doi:10.1016/j.agrformet.2015.02.007

Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems

Junjiong Shao, Xuhui Zhou, Yiqi Luo, Bo Li, Mika Aurela, David Billesbach, Peter D. Blanken, Rosvel Bracho, Jiquan Chen, Marc Fischer, Yuling Fu, Lianhong Gu, Shijie Han, Yongtao He, Thomas Kolb, Yingnian Li, Zoltan Nagy, Shuli Niu, Walter C. Oechel, Krisztina PinterPeili Shi, Andrew Suyker, Margaret Torn, Andrej Varlagin, Huimin Wang, Junhua Yan, Guirui Yu, Junhui Zhang

Ecosystem Processes

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56 Scopus citations

Abstract

Interannual variability (IAV, represented by standard deviation) in net ecosystem exchange of CO₂ (NEE) is mainly driven by climatic drivers and biotic variations (i.e., the changes in photosynthetic and respiratory responses to climate), the effects of which are referred to as climatic (CE) and biotic effects (BE), respectively. Evaluating the relative contributions of CE and BE to the IAV in carbon (C) fluxes and understanding their controlling mechanisms are critical in projecting ecosystem changes in the future climate. In this study, we applied statistical methods with flux data from 65 sites located in the Northern Hemisphere to address this issue. Our results showed that the relative contribution of BE (CnBE) and CE (CnCE) to the IAV in NEE was 57%±14% and 43%±14%, respectively. The discrepancy in the CnBE among sites could be largely explained by water balance index (WBI). Across water-stressed ecosystems, the CnBE decreased with increasing aridity (slope=0.18%mm^-1). In addition, the CnBE tended to increase and the uncertainty reduced as timespan of available data increased from 5 to 15 years. Inter-site variation of the IAV in NEE mainly resulted from the IAV in BE (72%) compared to that in CE (37%). Interestingly, positive correlations between BE and CE occurred in grasslands and dry ecosystems (r>0.45, P<0.05) but not in other ecosystems. These results highlighted the importance of BE in determining the IAV in NEE and the ability of ecosystems to regulate C fluxes under climate change might decline when the ecosystems experience more severe water stress in the future.

Original language	English
Pages (from-to)	11-22
Number of pages	12
Journal	Agricultural and Forest Meteorology
Volume	205
DOIs	https://doi.org/10.1016/j.agrformet.2015.02.007
State	Published - Jun 1 2015

Funding

We thank the two anonymous reviewers for their insightful comments and suggestions. This research was financially supported by the National Natural Science Foundation of China (Grant No. 31290221, 31070407, 31370489), the National Basic Research Program (973 Program) of China (No. 2010CB833502), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and ‘Thousand Young Talents’ Program in China. We also thank Marc Aubinet, Dennis Baldocchi, Christian Bernhofer, Gil Bohrer, Paul Bolstad, Nina Buchmann, Alexander Cernusca, Reinhart Ceulemans, Kenneth Clark, Ankur Desai, Allen Goldstein, Andre Granier, David Hollinger, Gabriel Katul, Alexander Knohl, Werner, Kutsch, Beverly Law Anders Lindroth, Timothy Martin, Tilden Meyers, Eddy Moors, William Munger, Kimberly Novick, Ram Oren, Serge Rambal, Corinna Rebmann, Andrew Richardson, Maria-Jose Sanz, Russ Scott, Lise Soerensen, Riccardo Valentini and Timo Vesala for their generous permission to access the flux data.

Keywords

Biotic effect
Climatic effect
Climatic stress
Interannual variability
Net ecosystem exchange
Relative importance

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10.1016/j.agrformet.2015.02.007

Cite this

Shao, J., Zhou, X., Luo, Y., Li, B., Aurela, M., Billesbach, D., Blanken, P. D., Bracho, R., Chen, J., Fischer, M., Fu, Y., Gu, L., Han, S., He, Y., Kolb, T., Li, Y., Nagy, Z., Niu, S., Oechel, W. C., ... Zhang, J. (2015). Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems. Agricultural and Forest Meteorology, 205, 11-22. https://doi.org/10.1016/j.agrformet.2015.02.007

@article{c33deab6c4e54a3394fcc9515894f709,

title = "Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems",

abstract = "Interannual variability (IAV, represented by standard deviation) in net ecosystem exchange of CO2 (NEE) is mainly driven by climatic drivers and biotic variations (i.e., the changes in photosynthetic and respiratory responses to climate), the effects of which are referred to as climatic (CE) and biotic effects (BE), respectively. Evaluating the relative contributions of CE and BE to the IAV in carbon (C) fluxes and understanding their controlling mechanisms are critical in projecting ecosystem changes in the future climate. In this study, we applied statistical methods with flux data from 65 sites located in the Northern Hemisphere to address this issue. Our results showed that the relative contribution of BE (CnBE) and CE (CnCE) to the IAV in NEE was 57\%±14\% and 43\%±14\%, respectively. The discrepancy in the CnBE among sites could be largely explained by water balance index (WBI). Across water-stressed ecosystems, the CnBE decreased with increasing aridity (slope=0.18\%mm-1). In addition, the CnBE tended to increase and the uncertainty reduced as timespan of available data increased from 5 to 15 years. Inter-site variation of the IAV in NEE mainly resulted from the IAV in BE (72\%) compared to that in CE (37\%). Interestingly, positive correlations between BE and CE occurred in grasslands and dry ecosystems (r>0.45, P<0.05) but not in other ecosystems. These results highlighted the importance of BE in determining the IAV in NEE and the ability of ecosystems to regulate C fluxes under climate change might decline when the ecosystems experience more severe water stress in the future.",

keywords = "Biotic effect, Climatic effect, Climatic stress, Interannual variability, Net ecosystem exchange, Relative importance",

author = "Junjiong Shao and Xuhui Zhou and Yiqi Luo and Bo Li and Mika Aurela and David Billesbach and Blanken, \{Peter D.\} and Rosvel Bracho and Jiquan Chen and Marc Fischer and Yuling Fu and Lianhong Gu and Shijie Han and Yongtao He and Thomas Kolb and Yingnian Li and Zoltan Nagy and Shuli Niu and Oechel, \{Walter C.\} and Krisztina Pinter and Peili Shi and Andrew Suyker and Margaret Torn and Andrej Varlagin and Huimin Wang and Junhua Yan and Guirui Yu and Junhui Zhang",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V.",

year = "2015",

month = jun,

day = "1",

doi = "10.1016/j.agrformet.2015.02.007",

language = "English",

volume = "205",

pages = "11--22",

journal = "Agricultural and Forest Meteorology",

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Shao, J, Zhou, X, Luo, Y, Li, B, Aurela, M, Billesbach, D, Blanken, PD, Bracho, R, Chen, J, Fischer, M, Fu, Y, Gu, L, Han, S, He, Y, Kolb, T, Li, Y, Nagy, Z, Niu, S, Oechel, WC, Pinter, K, Shi, P, Suyker, A, Torn, M, Varlagin, A, Wang, H, Yan, J, Yu, G & Zhang, J 2015, 'Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems', Agricultural and Forest Meteorology, vol. 205, pp. 11-22. https://doi.org/10.1016/j.agrformet.2015.02.007

TY - JOUR

T1 - Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems

AU - Shao, Junjiong

AU - Zhou, Xuhui

AU - Luo, Yiqi

AU - Li, Bo

AU - Aurela, Mika

AU - Billesbach, David

AU - Blanken, Peter D.

AU - Bracho, Rosvel

AU - Chen, Jiquan

AU - Fischer, Marc

AU - Fu, Yuling

AU - Gu, Lianhong

AU - Han, Shijie

AU - He, Yongtao

AU - Kolb, Thomas

AU - Li, Yingnian

AU - Nagy, Zoltan

AU - Niu, Shuli

AU - Oechel, Walter C.

AU - Pinter, Krisztina

AU - Shi, Peili

AU - Suyker, Andrew

AU - Torn, Margaret

AU - Varlagin, Andrej

AU - Wang, Huimin

AU - Yan, Junhua

AU - Yu, Guirui

AU - Zhang, Junhui

PY - 2015/6/1

Y1 - 2015/6/1

N2 - Interannual variability (IAV, represented by standard deviation) in net ecosystem exchange of CO2 (NEE) is mainly driven by climatic drivers and biotic variations (i.e., the changes in photosynthetic and respiratory responses to climate), the effects of which are referred to as climatic (CE) and biotic effects (BE), respectively. Evaluating the relative contributions of CE and BE to the IAV in carbon (C) fluxes and understanding their controlling mechanisms are critical in projecting ecosystem changes in the future climate. In this study, we applied statistical methods with flux data from 65 sites located in the Northern Hemisphere to address this issue. Our results showed that the relative contribution of BE (CnBE) and CE (CnCE) to the IAV in NEE was 57%±14% and 43%±14%, respectively. The discrepancy in the CnBE among sites could be largely explained by water balance index (WBI). Across water-stressed ecosystems, the CnBE decreased with increasing aridity (slope=0.18%mm-1). In addition, the CnBE tended to increase and the uncertainty reduced as timespan of available data increased from 5 to 15 years. Inter-site variation of the IAV in NEE mainly resulted from the IAV in BE (72%) compared to that in CE (37%). Interestingly, positive correlations between BE and CE occurred in grasslands and dry ecosystems (r>0.45, P<0.05) but not in other ecosystems. These results highlighted the importance of BE in determining the IAV in NEE and the ability of ecosystems to regulate C fluxes under climate change might decline when the ecosystems experience more severe water stress in the future.

AB - Interannual variability (IAV, represented by standard deviation) in net ecosystem exchange of CO2 (NEE) is mainly driven by climatic drivers and biotic variations (i.e., the changes in photosynthetic and respiratory responses to climate), the effects of which are referred to as climatic (CE) and biotic effects (BE), respectively. Evaluating the relative contributions of CE and BE to the IAV in carbon (C) fluxes and understanding their controlling mechanisms are critical in projecting ecosystem changes in the future climate. In this study, we applied statistical methods with flux data from 65 sites located in the Northern Hemisphere to address this issue. Our results showed that the relative contribution of BE (CnBE) and CE (CnCE) to the IAV in NEE was 57%±14% and 43%±14%, respectively. The discrepancy in the CnBE among sites could be largely explained by water balance index (WBI). Across water-stressed ecosystems, the CnBE decreased with increasing aridity (slope=0.18%mm-1). In addition, the CnBE tended to increase and the uncertainty reduced as timespan of available data increased from 5 to 15 years. Inter-site variation of the IAV in NEE mainly resulted from the IAV in BE (72%) compared to that in CE (37%). Interestingly, positive correlations between BE and CE occurred in grasslands and dry ecosystems (r>0.45, P<0.05) but not in other ecosystems. These results highlighted the importance of BE in determining the IAV in NEE and the ability of ecosystems to regulate C fluxes under climate change might decline when the ecosystems experience more severe water stress in the future.

KW - Biotic effect

KW - Climatic effect

KW - Climatic stress

KW - Interannual variability

KW - Net ecosystem exchange

KW - Relative importance

UR - https://www.scopus.com/pages/publications/84922981901

U2 - 10.1016/j.agrformet.2015.02.007

DO - 10.1016/j.agrformet.2015.02.007

M3 - Article

AN - SCOPUS:84922981901

SN - 0168-1923

VL - 205

SP - 11

EP - 22

JO - Agricultural and Forest Meteorology

JF - Agricultural and Forest Meteorology

ER -

Biotic and climatic controls on interannual variability in carbon fluxes across terrestrial ecosystems

Abstract

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Keywords

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