Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forest
Tree-ring carbon (C) isotope composition (δ13C) varies depending on photosynthetic capacity and stomatal conductance, and it is therefore intrinsically associated with vegetation productivity. Still, very little is known about the relationship between tree-ring δ13C values and forest gross primary p...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X23005605 |
| _version_ | 1797802881227685888 |
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| author | Haoyu Diao Anzhi Wang Mana Gharun Matthias Saurer Fenghui Yuan Dexin Guan Guanhua Dai Jiabing Wu |
| author_facet | Haoyu Diao Anzhi Wang Mana Gharun Matthias Saurer Fenghui Yuan Dexin Guan Guanhua Dai Jiabing Wu |
| author_sort | Haoyu Diao |
| collection | DOAJ |
| description | Tree-ring carbon (C) isotope composition (δ13C) varies depending on photosynthetic capacity and stomatal conductance, and it is therefore intrinsically associated with vegetation productivity. Still, very little is known about the relationship between tree-ring δ13C values and forest gross primary productivity (GPP). Here, we investigated relationships between tree-ring δ13C, tree-ring width index (RWI) and ecosystem-level GPP in a Korean pine (Pinus koraiensis)-dominated old-growth temperate forest in northeastern China. Specifically, we generated chronologies of RWI and δ13C from early-wood (δ13CEW) and late-wood (δ13CLW) of Korean pines, and we built a 17-year continuous ecosystem-level GPP series using eddy covariance measurements, in which a GPP model was used for gap filling. RWI showed vague relationships with tree-ring δ13C and whole-forest GPP, and it was insensitive to interannual variations in climate at the study site. By contrast, both δ13CEW and δ13CLW showed significant relationships with climate variables and GPP. This suggests that isotopic signals of photosynthetic C uptake were imprinted on the formation of tree rings and that tree-ring δ13C of Korean pine is a better proxy for forest GPP than RWI. In addition, tree-ring δ13C of Korean pines was positively correlated with GPP, with an especially close relationship between δ13CEW and GPP of the current year. This implies that photosynthetic activity, rather than stomatal conductance, was the main driver of tree-ring δ13C signals of Korean pine and it was mainly influenced by the climate conditions of the current year, probably because of a limited use of previously fixed C during early-wood formation. Our findings demonstrate the great potential of tree-ring δ13C for reconstructing GPP timeseries at the centennial scale for forest ecosystems, and they could help to constrain parameters in terrestrial C cycle models to improve predictions of C fluxes. |
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| format | Article |
| id | doaj.art-d554f533c1f54e939349882dece9e0f1 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-03-13T05:13:30Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
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| series | Ecological Indicators |
| spelling | doaj.art-d554f533c1f54e939349882dece9e0f12023-06-16T05:08:43ZengElsevierEcological Indicators1470-160X2023-09-01153110418Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forestHaoyu Diao0Anzhi Wang1Mana Gharun2Matthias Saurer3Fenghui Yuan4Dexin Guan5Guanhua Dai6Jiabing Wu7CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100049, China; Swiss Federal Institute for Forest, Snow and Landscape Research WSL, 8903 Birmensdorf, SwitzerlandCAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, ChinaInstitute of Landscape Ecology, University of Münster, Hiesenbergstrasse 2, 48149 Münster, Germany; Department of Environmental Systems Science, ETH Zürich, Universitätstrasse 2, 8092 Zürich, SwitzerlandSwiss Federal Institute for Forest, Snow and Landscape Research WSL, 8903 Birmensdorf, SwitzerlandCAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, ChinaCAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, ChinaCAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; Research Station of Changbai Mountain Forest Ecosystems, Chinese Academy of Sciences, Antu 133600, ChinaCAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; Corresponding author at: Institute of Applied Ecology, Chinese Academy of Sciences, Wenhua Road No.72, Shenyang 110016, China.Tree-ring carbon (C) isotope composition (δ13C) varies depending on photosynthetic capacity and stomatal conductance, and it is therefore intrinsically associated with vegetation productivity. Still, very little is known about the relationship between tree-ring δ13C values and forest gross primary productivity (GPP). Here, we investigated relationships between tree-ring δ13C, tree-ring width index (RWI) and ecosystem-level GPP in a Korean pine (Pinus koraiensis)-dominated old-growth temperate forest in northeastern China. Specifically, we generated chronologies of RWI and δ13C from early-wood (δ13CEW) and late-wood (δ13CLW) of Korean pines, and we built a 17-year continuous ecosystem-level GPP series using eddy covariance measurements, in which a GPP model was used for gap filling. RWI showed vague relationships with tree-ring δ13C and whole-forest GPP, and it was insensitive to interannual variations in climate at the study site. By contrast, both δ13CEW and δ13CLW showed significant relationships with climate variables and GPP. This suggests that isotopic signals of photosynthetic C uptake were imprinted on the formation of tree rings and that tree-ring δ13C of Korean pine is a better proxy for forest GPP than RWI. In addition, tree-ring δ13C of Korean pines was positively correlated with GPP, with an especially close relationship between δ13CEW and GPP of the current year. This implies that photosynthetic activity, rather than stomatal conductance, was the main driver of tree-ring δ13C signals of Korean pine and it was mainly influenced by the climate conditions of the current year, probably because of a limited use of previously fixed C during early-wood formation. Our findings demonstrate the great potential of tree-ring δ13C for reconstructing GPP timeseries at the centennial scale for forest ecosystems, and they could help to constrain parameters in terrestrial C cycle models to improve predictions of C fluxes.http://www.sciencedirect.com/science/article/pii/S1470160X23005605Carbon cycleClimate changeDendrochronologyEddy covarianceForest CO2 fluxStable carbon isotope |
| spellingShingle | Haoyu Diao Anzhi Wang Mana Gharun Matthias Saurer Fenghui Yuan Dexin Guan Guanhua Dai Jiabing Wu Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forest Ecological Indicators Carbon cycle Climate change Dendrochronology Eddy covariance Forest CO2 flux Stable carbon isotope |
| title | Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forest |
| title_full | Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forest |
| title_fullStr | Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forest |
| title_full_unstemmed | Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forest |
| title_short | Tree-ring δ13C of Pinus koraiensis is a better tracer of gross primary productivity than tree-ring width index in an old-growth temperate forest |
| title_sort | tree ring δ13c of pinus koraiensis is a better tracer of gross primary productivity than tree ring width index in an old growth temperate forest |
| topic | Carbon cycle Climate change Dendrochronology Eddy covariance Forest CO2 flux Stable carbon isotope |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X23005605 |
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