Estimating individual- and stand-level stem CO2 efflux in a subalpine forest: assessment of different extrapolation methods
文献类型：期刊论文
| 作者 | Zhao, Guang1; Liu, Gangcai2; Zhu, Wanze2 |
| 刊名 | TREES-STRUCTURE AND FUNCTION
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 33期号:6页码:1603-1613 |
| 关键词 | Stem CO2 efflux Vertical variation Scaling Carbon loss |
| ISSN号 | 0931-1890 |
| DOI | 10.1007/s00468-019-01883-w |
| 通讯作者 | Liu, Gangcai(liugc@imde.ac.cn) ; Zhu, Wanze(wzzhu@imde.ac.cn) |
| 英文摘要 | Accurate evaluation of the carbon release by stems is an important objective of many forest carbon cycling studies. However, few studies have assessed the applicability of different extrapolation methods of stem CO2 efflux. Therefore, a reliable estimation method that considers both temporal and vertical variations is required. To overcome this problem, we conducted a field experiment to measure the stem CO2 efflux rate of Abies fabri in subalpine forests, and evaluated the effect of three extrapolation methods (area-based estimation, volume-based estimation and integral method) on accurate estimation of stem respiration at the individual and stand levels. First, we calculated the stem carbon loss at the individual level using the three extrapolation methods, and discovered that the diameter at the breast height (DBH) played a major role in determining the magnitudes of stem respiration. Second, we summarized the relationship between the stem CO2 efflux rate (E-s) and the DBH from previous studies. The E-s for small diameter stems tended to increase with height, but remained constant in trees with large DBH, implying a role of DBH threshold in determination of the E-s effect. Our calculations from three estimation methods supported the hypothesis that a threshold accounted for the different vertical variations in E-s. Specifically, the vertical variation of E-s primarily presented as two categories: E-s decreased with the stem height for small diameters (DBH < 30 or 40 cm), or E-s showed little change for stem height for large diameters (DBH > 60 cm). Based on these trends, we suggest a two-part approach to scale the individual tree stem CO2 efflux, in which a volume-based scaling method is recommended for trees with small DBH (0-30 or 40 cm) and an area-based estimation is suitable for stems with large DBH (> 30 or 40 cm). Using this approach, the annual amount of stem carbon release for an immature forest and a mature forest were estimated as 1.80 and 4.81 t C ha(-1) year(-1), respectively. |
| WOS关键词 | WOODY-TISSUE RESPIRATION ; MAINTENANCE RESPIRATION ; VERTICAL VARIATIONS ; SEASONAL-VARIATIONS ; GROWTH ; COMPONENTS ; TREE ; TEMPERATURE ; NITROGEN ; FLUX |
| 资助项目 | National key research and development program of China[2017YFC0505004] ; 135 Strategic Program of Institute of Mountain Hazards and Environment[SDS-135-1707] |
| WOS研究方向 | Forestry |
| 语种 | 英语 |
| WOS记录号 | WOS:000494830600007 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | National key research and development program of China ; 135 Strategic Program of Institute of Mountain Hazards and Environment |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/132067]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Gangcai; Zhu, Wanze |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Plateau Ecosyst Res Stn, Beijing 100101, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Guang,Liu, Gangcai,Zhu, Wanze. Estimating individual- and stand-level stem CO2 efflux in a subalpine forest: assessment of different extrapolation methods[J]. TREES-STRUCTURE AND FUNCTION,2019,33(6):1603-1613. |
| APA | Zhao, Guang,Liu, Gangcai,&Zhu, Wanze.(2019).Estimating individual- and stand-level stem CO2 efflux in a subalpine forest: assessment of different extrapolation methods.TREES-STRUCTURE AND FUNCTION,33(6),1603-1613. |
| MLA | Zhao, Guang,et al."Estimating individual- and stand-level stem CO2 efflux in a subalpine forest: assessment of different extrapolation methods".TREES-STRUCTURE AND FUNCTION 33.6(2019):1603-1613. |
入库方式： OAI收割
来源：地理科学与资源研究所
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