VEGETATION CARBON STORAGE OF MAJOR SHRUBLANDS IN CHINA

doi:10.17521/cjpe.2006.0071

Abstract

Abstract:

Background and Aims Shrublands is one of the major types of terrestrial ecosystems, which widely distributes from tropical to polar regions. Due to their largely distributional area in China, it is very important for us to exactly estimate their carbon storages and spatial distributions. Answers to the following questions were sought: (a) How much is the vegetation carbon storage of major shrublands in China? (b) How are their spatial distributions in China?
Methods Based on published biomass data in shrublands and 1∶4 000 000 digital vegetation map of China, carbon storage of major shrublands in China was estimated using the method of mean biomass carbon density for different shrublands types.
Key Results The carbon storage of six shrublands in China is 1.68±0.12 Pg C (1 Pg = 10¹⁵ g) with an total area of 15 462.64×10⁴ hm². The average vegetation carbon density is 10.88±0.77 Mg C·hm^-2, varying from 5.92 to 17.00 Mg C·hm^-2 for different shrubland types. The distribution of shrublands is spatially heterogeneous in the country. Shrublands in three provinces (Yunnan, Guizhou and Sichuan) in Southwest China occupies 23.5% of the total area and contributes to approximately one-third (32.6%) of the total carbon storage of six shrubland types in China due to favorable climeste and soil conditions. The area of six shrubland types in Inner Mongolia is the second largest among all the provinces. However, the vegetation carbon storage in Inner Mongolia shrublands is only 84.81 Tg C (1 Tg = 10¹² g), following that of Yunnan, Guizhou, Sichuan, Jiangxi, and Hunan. The probable reason is ascribed to its arid or semiarid climatic conditions. Although shrublands hold about 1.5 times the area of forests in China, the carbon storage of shrublands corresponds 27%-40% of forests because carbon density of shrublands accounts for only one-fifth of forests. Similarly, the proportion of vegetation carbon storage of shrublands to that of grasslands in China varies from 36% to 55% due to the different areas of grasslands used in previous studies.
Conclusions This study draw the following conclusions: (a) As important ecosystem types in China, shrublands hold large vegetation carbon storage, which is main component of China's vegetation carbon storage. (b) Because of different climatic and soil conditions, their distributions are spatially heterogeneous in China and The average vegetation carbon density varies greatly for different shrubland types.

Key words: Shrublands, Vegetation carbon storage, Carbon density

HU Hui-Feng, WANG Zhi-Heng, LIU Guo-Hua, FU Bo-Jie. VEGETATION CARBON STORAGE OF MAJOR SHRUBLANDS IN CHINA[J]. Chin J Plant Ecol, 2006, 30(4): 539-544.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2006.0071

https://www.plant-ecology.com/EN/Y2006/V30/I4/539

Figures/Tables 5

References 25

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灌丛类型 Shrublands types	生物量 Biomass (t·hm^-2)		地下(B)和地上(A)的关系 The relationship between belowground (B) and aboveground (A)
灌丛类型 Shrublands types	样本数 Samples	平均±标准差 Mean±SE	关系 Relationship
热带海滨硬叶常绿阔叶灌丛、矮林¹⁾	3	11.84±1.36	A/B=2.10 n=3
温带、亚热带落叶灌丛、矮林²⁾	78	12.48±1.25	B=-1 558.15+1.97A R²=0.785 p<0.01 n=8
温带、亚热带亚高山落叶灌丛³⁾	55	15.49±1.83	B=678.56+1.22A R²=0.578 p<0.01 n=13
亚热带、热带石灰岩具有多种藤本的常绿、落叶灌丛、矮林⁴⁾	8	24.22±4.22	A/B=1.40 n=7
亚热带、热带酸性土常绿、落叶阔叶灌丛、矮林和草甸结合⁵⁾	17	34.00±4.64	A/B=0.62 n=7
亚热带高山、亚高山常绿革质叶灌丛、矮林⁶⁾	10	23.48±3.48	A/B=1.17 n=8
总计 Total	171	21.76±1.10

灌丛类型 Shrublands types	生物量 Biomass (t·hm^-2)		地下(B)和地上(A)的关系 The relationship between belowground (B) and aboveground (A)
灌丛类型 Shrublands types	样本数 Samples	平均±标准差 Mean±SE	关系 Relationship
热带海滨硬叶常绿阔叶灌丛、矮林¹⁾	3	11.84±1.36	A/B=2.10 n=3
温带、亚热带落叶灌丛、矮林²⁾	78	12.48±1.25	B=-1 558.15+1.97A R²=0.785 p<0.01 n=8
温带、亚热带亚高山落叶灌丛³⁾	55	15.49±1.83	B=678.56+1.22A R²=0.578 p<0.01 n=13
亚热带、热带石灰岩具有多种藤本的常绿、落叶灌丛、矮林⁴⁾	8	24.22±4.22	A/B=1.40 n=7
亚热带、热带酸性土常绿、落叶阔叶灌丛、矮林和草甸结合⁵⁾	17	34.00±4.64	A/B=0.62 n=7
亚热带高山、亚高山常绿革质叶灌丛、矮林⁶⁾	10	23.48±3.48	A/B=1.17 n=8
总计 Total	171	21.76±1.10

灌丛类型 Shrublands types	面积 Area (10⁴ hm²)	碳密度 Carbon density (Mg C·hm^-2) Mean±SE	碳储量 Carbon storage (Tg C) Mean±SE
热带海滨硬叶常绿阔叶灌丛、矮林¹⁾	0.26	5.92±0.96	0.02
温带、亚热带落叶灌丛、矮林²⁾	7 476.35	6.24±0.88	462.80±65.79
温带、亚热带亚高山落叶灌丛³⁾	563.48	7.74±1.30	43.64±7.32
亚热带、热带石灰岩具有多种藤本的常绿、落叶灌丛、矮林⁴⁾	1 539.51	12.11±2.99	186.45±46.03
亚热带、热带酸性土常绿、落叶阔叶灌丛、矮林和草甸结合⁵⁾	5 598.52	17.00±3.28	951.67±183.63
亚热带高山、亚高山常绿革质叶灌丛、矮林⁶⁾	284.53	11.74±2.46	33.40±7.00
总计 Total	15 462.64	10.88±0.77	1 681.98±119.06

灌丛类型 Shrublands types	面积 Area (10⁴ hm²)	碳密度 Carbon density (Mg C·hm^-2) Mean±SE	碳储量 Carbon storage (Tg C) Mean±SE
热带海滨硬叶常绿阔叶灌丛、矮林¹⁾	0.26	5.92±0.96	0.02
温带、亚热带落叶灌丛、矮林²⁾	7 476.35	6.24±0.88	462.80±65.79
温带、亚热带亚高山落叶灌丛³⁾	563.48	7.74±1.30	43.64±7.32
亚热带、热带石灰岩具有多种藤本的常绿、落叶灌丛、矮林⁴⁾	1 539.51	12.11±2.99	186.45±46.03
亚热带、热带酸性土常绿、落叶阔叶灌丛、矮林和草甸结合⁵⁾	5 598.52	17.00±3.28	951.67±183.63
亚热带高山、亚高山常绿革质叶灌丛、矮林⁶⁾	284.53	11.74±2.46	33.40±7.00
总计 Total	15 462.64	10.88±0.77	1 681.98±119.06

各省区 Province	总面积 Area (10⁴ hm²)	总碳量 Total (Tg C)
安徽 Anhui	368.30	40.55
北京 Beijing	73.07	4.56
福建 Fujian	587.42	99.74
甘肃 Gansu	382.09	25.79
广东 Guangdong^a	520.19	86.67
广西 Guangxi	529.27	74.84
贵州 Guizhou	1 129.35	174.38
海南 Hainan	120.23	20.23
河北 Hebei	527.66	32.95
黑龙江 Heilongjiang	827.29	51.65
河南 Henan	434.94	27.16
湖北 Hubei	693.33	49.09
湖南 Hunan	660.34	103.13
江苏 Jiangsu^b	5.51	0.34
江西 Jiangxi	680.40	113.27
吉林 Jilin	402.17	25.11
辽宁 Liaoning	424.32	26.49
内蒙古 Inner Mongolia	1 358.33	84.81
宁夏 Ningxia	30.30	1.89
青海 Qinghai	267.71	18.61
山东 Shandong	134.90	8.42
陕西 Shaanxi	704.34	45.69
山西 Shanxi	643.71	40.19
四川 Sichuan^c	1 022.34	138.27
天津 Tianjin	2.58	0.16
新疆 Xinjiang	508.27	31.73
西藏 Xizang	471.09	42.55
云南 Yunnan	1 484.23	236.01
浙江 Zhejiang	468.98	77.70
全国 All	15 462.64	1 681.98