Carbon storage of the forests and its spatial pattern in Nei Mongol, China

doi:10.17521/cjpe.2015.1088

Abstract

Abstract:

Aims
Forest carbon storage in Nei Mongol plays a significant role in national terrestrial carbon budget due to its large area in China. Our objectives were to estimate the carbon storage in the forest ecosystems in Nei Mongol and to quantify its spatial pattern.
Methods
Field survey and sampling were conducted at 137 sites that distributed evenly across the forest types in the study region. At each site, the ecosystem carbon density was estimated thorough sampling and measuring different pools of soil (0-100 cm) and vegetation, including biomass of tree, grass, shrub, and litter. Regional carbon storage was calculated with the estimated carbon density for each forest type.
Important findings
Carbon storage of vegetation layer in forests in Nei Mongol was 787.8 Tg C, with the biomass of tree, litter, herbaceous and shrub accounting for 93.5%, 3.0%, 2.7% and 0.8%, respectively. Carbon density of vegetation layer was 40.4 t·hm^-2, with 35.6 t·hm^-2 in trees, 2.9 t·hm^-2 in litter, 1.2 t·hm^-2 in herbaceous and 0.6 t·hm^-2 in shrubs. In comparison, carbon storage of soil layer in forests in Nei Mongol was 2449.6 Tg C, with 79.8% distributed in the first 30 cm. Carbon density of soil layer was 144.4 t·hm^-2. Carbon storage of forest ecosystem in Nei Mongol was 3237.4 Tg C, with vegetation and soil accounting for 24.3% and 75.7%, respectively. Carbon density of forest ecosystems in Nei Mongol was 184.5 t·hm^-2. Carbon density of soil layer was positively correlated with that of vegetation layer. Spatially, both carbon storage and carbon density were higher in the eastern area, where the climate is more humid. Forest reserves and artificial afforestations can significantly improve the capacity of regional carbon sink.

http://jtp.cnki.net/bilingual/detail/html/ZWSB201604006

Key words: carbon storage, carbon density, spatial distribution, forest ecosystems, Nei Mongol

Xiao-Qiong HUANG, Cun-Lin XIN, Zhong-Min HU, Gang-Tie LI, Tong-Hui ZHANG, Wei ZHAO, Hao YANG, Lei-Min ZHANG, Qun GUO, Yong-Jie YUE, Run-Hong Gao, Zhi-Yan WU, Zhi-Gang YAN, Xin-Ping LIU, Yu-Qiang LI, Sheng-Gong LI. Carbon storage of the forests and its spatial pattern in Nei Mongol, China[J]. Chin J Plant Ecol, 2016, 40(4): 327-340.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2015.1088

https://www.plant-ecology.com/EN/Y2016/V40/I4/327

Figures/Tables 8

Fig. 1 Distribution of sampling sites in Nei Mongol’s forest.

Fig. 2 Carbon storage in different forest types (A) and regions (B) of vegetation layer in Nei Mongol. A, Larix gmelinii forest; B, Larix gmelinii var. principis-rupprechtii forest; C, Quercus robur forest; D, Betula davurica forest; E, Ulmus pumila sparse forest; F, Populus davidiana forest; G, Pinus sylvestris var. mongolica forest; H, Populus simonii forest; I, Populus euphratica forest; J, Pinus tabulaeformis forest; K, Juniperus rigida forest; L, Betula platyphylla forest; M, Picea asperata forest. N, Hulun Buir City; O, Hinggan League; P, Chifeng City; Q, Tongliao City; R, Xilinguole League; S, Hohhot City; T, Alashan League; U, Baotou City; V, Wulanchabu City; W, Bayannur City; X, Ordos City.

Fig. 3 Carbon density and its spatial distributions in vegetation layer in forests in Nei Mongol. A, Larix gmelinii forest; B, Larix gmelinii var. principis-rupprechtii forest; C, Quercus robur forest; D, Betula davurica forest; E, Ulmus pumila sparse forest; F, Populus davidiana forest; G, Pinus sylvestris var. mongolica forest; H, Populus simonii forest; I, Populus euphratica forest; J, Pinus tabulaeformis forest; K, Juniperus rigida forest; L, Betula platyphylla forest; M, Picea asperata forest.

Fig. 4 Carbon storage in different forest types (A) and regions (B) of soil layer in forests in Nei Mongol. A, Larix gmelinii forest; B, Larix gmelinii var. principis-rupprechtii forest; C, Quercus robur forest; D, Betula davurica forest; E, Ulmus pumila sparse forest; F, Populus davidiana forest; G, Pinus sylvestris var. mongolica forest; H, Populus simonii forest; I, Populus euphratica forest; J, Pinus tabulaeformis forest; K, Juniperus rigida forest; L, Betula platyphylla forest; M, Picea asperata forest. N, Hulun Buir City; O, Hinggan League; P, Chifeng City; Q, Tongliao City; R, Xilinguole League; S, Hohhot City; T, Alashan League; U, Baotou City; V, Wulanchabu City; W, Bayannur City; X, Ordos City.

Fig. 5 Carbon density (A) and content (B) and their spatial distributions (C) in soil layers in forests in Nei Mongol. A, Larix gmelinii forest; B, Larix gmelinii var. principis- rupprechtii forest; C, Quercus robur forest; D, Betula davurica forest; E, Ulmus pumila sparse forest; F, Populus davidiana forest; G, Pinus sylvestris var. mongolica forest; H, Populus simonii forest; I, Populus euphratica forest; J, Pinus tabulaeformis forest; K, Juniperus rigida forest; L, Betula platyphylla forest; M, Picea asperata forest.

Fig. 6 Carbon storage in different forest types (A) and regions (B) in forests in Nei Mongol. A, Larix gmelinii forest; B, Larix gmelinii var. principis-rupprechtii forest; C, Quercus robur forest; D, Betula davurica forest; E, Ulmus pumila sparse forest; F, Populus davidiana forest; G, Pinus sylvestris var. mongolica forest; H, Populus simonii forest; I, Populus euphratica forest; J, Pinus tabulaeformis forest; K, Juniperus rigida forest; L, Betula platyphylla forest; M, Picea asperata forest. N, Hulun Buir City; O, Hinggan League; P, Chifeng City; Q, Tongliao City; R, Xilinguole League; S, Hohhot City; T, Alashan League; U, Baotou City; V, Wulanchabu City; W, Bayannur City; X, Ordos City.

Fig. 7 Carbon density and its spatial distribution in forests of Nei Mongol. A, Larix gmelinii forest; B, Larix gmelinii var. principis-rupprechtii forest; C, Quercus robur forest; D, Betula davurica forest; E, Ulmus pumila sparse forest; F, Populus davidiana forest; G, Pinus sylvestris var. mongolica forest; H, Populus simonii forest; I, Populus euphratica forest; J, Pinus tabulaeformis forest; K, Juniperus rigida forest; L, Betula platyphylla forest; M, Picea asperata forest.

Fig. 8 The relationship between carbon density of soil and tree in forests in Nei Mongol.

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