[1]安相,陈云明,唐亚坤.东亚森林、草地碳利用效率及碳通量空间变化的影响因素分析[J].水土保持研究,2017,24(05):79-87,92.
　AN Xiang,CHEN Yunming,TANG Yakun.Factors Affecting the Spatial Variation of Carbon Use Efficiency and Carbon Fluxes in East Asian Forest and Grassland[J].Research of Soil and Water Conservation,2017,24(05):79-87,92.
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东亚森林、草地碳利用效率及碳通量空间变化的影响因素分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 24 期数: 2017年05期 页码: 79-87,92 栏目: 出版日期: 2017-10-28
Title:
Factors Affecting the Spatial Variation of Carbon Use Efficiency and Carbon Fluxes in East Asian Forest and Grassland
作者:
安相1, 陈云明2,3, 唐亚坤2,3
1. 西北农林科技大学 水土保持研究所, 陕西 杨凌 712100;
2. 西北农林科技大学 水土保持研究所 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100;
3. 中国科学院 水利部 水土保持研究所, 陕西 杨凌 712100
Author(s):
AN Xiang1, CHEN Yunming2,3, TANG Yakun2,3
1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
关键词:
森林; 草地; 碳利用效率; 碳通量; 涡度相关法
Keywords:
forest; grassland; CUE; carbon dioxide flux; eddy covariance
分类号:
S718.5;X171.1
摘要:
森林和草地是陆地生态系统的重要组成部分，研究整合基于涡度相关法观测碳通量的已发表文献，共选取东亚地区40个拥有1年以上数据的通量站（森林26个，草地14个），分析碳利用效率（CUE）以及净生态系统生产力（NEP）、总生态系统生产力（GEP）、生态系统呼吸（RE）的空间变异特征及其影响因素。东亚地区的森林和草地为碳汇，且森林的碳汇显著高于草地（p < 0.001），其NEP分别为328.64±256.46 gC/（m2·a），63.43±42.99 gC/（m2·a）。森林和草地的CUE分别为0.21，0.20，影响森林CUE变化的因素主要是林龄，呈线性负相关关系（p < 0.001）。影响草地CUE的因素主要是年均降水量（MAP），呈线性负相关关系（p < 0.05）。森林和草地的GEP，RE均是随纬度的升高而线性降低，NEP与纬度呈现二次函数关系，随纬度升高而先升高后降低。森林和草地的GEP，RE都与MAP呈线性正相关关系，且NEP与MAP呈先升高后降低的二次函数关系，其中森林和草地的饱和降水量大约为1 300 mm和390 mm。森林的GEP，RE与年均温（MAT）呈现线性正相关关系。森林和草地的GEP，RE与增强型植被指数（EVI）呈线性正相关关系。
Abstract:
Forest and grassland play an essential role in the terrestrial ecosystem. The objective of this study is to analyze the spatial variation characteristics and influence factors of carbon use efficiency (CUE), gross ecosystem production (GEP), ecosystem respiration (ER), and net ecosystem production (NEP) based on more than one year data which were obtained from 40 sites (26 forest sites, 14 grassland sites) in the East Asian region from published literatures. Forest and grassland in the East Asian region both exhibit carbon sinks, while forest showed significantly higher value than grassland (p < 0.001). The average NEP in forest and grassland in the East Asian are 328.64±256.46 gC/(m2·a) and 63.43±42.99 gC/(m2·a), respectively. The average CUE in forest and grassland are 0.21 and 0.20 in this region, CUE of forest is negatively correlated with the forest age and mean annual precipitation (MAP), respectively. The results show that GEP and ER in forest grassland linearly decrease with an increase in latitude. In addition, relationship between NEP and latitude can be described by quadratic function. There is a clear linear relationship between GEP, ER with MAP in both forest and grassland. The results also show that MAP and NEP first increase and then decrease with a quadratic function relationship, NEP is the maximum when amounts precipitation are 1 300 mm and 390 mm for forest and grassland, respectively. GEP and ER in forest show a positive relationship with mean annual temperature. Moreover, GEP and RE in both forest and grassland showed a positive linear correlation with vegetation index.

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备注/Memo

收稿日期:2016-09-29;改回日期:2016-10-24。
基金项目:西北农林科技大学博士科研启动费（Z109021508）；中央高校基本科研业务费（Z109021606）；公益性行业（气象）科研专项（重大专项）（GYHY201506001-3）
作者简介:安相(1990-),男(锡伯族),辽宁抚顺人,硕士研究生,从事陆地生态系统碳汇相关研究。E-mail:xiangan10@163.com
通讯作者:陈云明(1967-),男,陕西渭南人,博士,研究员,主要从事植被与水土保持的相关研究。E-mail:ymchen@ms.iswc.ac.cn

更新日期/Last Update: 1900-01-01