Association of urban forest landscape characteristics with biomass and soil carbon stocks in Harbin City, Northeastern China

doi:10.7717/peerj.5825

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Association of urban forest landscape characteristics with biomass and soil carbon stocks in Harbin City, Northeastern China
	Zhou, Wei 2; Zhang, Bo 2; Xiao, Lu 3; Wei, Chenhui 3; He, Xingyuan 1,3; Wang, Wenjie 2,3; Lv, Hailiang 2,3
刊名	PEERJ
	2018-10-29
卷号	6 页码:26
关键词	Carbon sinks function Landscape metrics GF1 images
ISSN号	2167-8359
DOI	10.7717/peerj.5825
通讯作者	Wang, Wenjie(wangwenjie@iga.ac.cn)
英文摘要	Background. Urban forests help in mitigating carbon emissions; however, their associations with landscape patterns are unclear. Understanding the associations would help us to evaluate urban forest ecological services and favor urban forest management via landscape regulations. We used Harbin, capital city of the northernmost province in China, as an example and hypothesized that the urban forests had different landscape metrics among different forest types, administrative districts, and urban-rural gradients, and these differences were closely associated with forest carbon sequestration in the biomass and soils. Methods. We extracted the urban forest tree coverage area on the basis of 2 GF-1 remote sensing images and object-oriented based classification method. The analysis of forest landscape patterns and estimation of carbon storage were based on tree coverage data and 199 plots. We also examined the relationships between forest landscape metrics and carbon storage on the basis of forest types, administrative districts, ring roads, and history of urban settlements by using statistical methods. Results. The small patches covering an area of less than 0.5 ha accounted for 72.6% of all patches (average patch size, 0.31 ha). The mean patch size (AREA_MN) and largest patch index (LPI) were the highest in the landscape and relaxation forest and Songbei District. The landscape shape index (LSI) and number of patches linearly decreased along rural-urban gradients (p < 0.05). The tree biomass carbon storage varied from less than 10 thousand tons in the urban center (first ring road region and 100-year regions) to more than 100 thousand tons in the rural regions (fourth ring road and newly urbanized regions). In the same urban-rural gradients, soil carbon storage varied from less than five thousand tons in the urban centers to 73-103 thousand tons in the rural regions. The association analysis indicated that the total forest area was the key factor that regulates total carbon storage in trees and soils. However, in the case of carbon density (ton ha(-1)), AREA_MN was strongly associated with tree biomass carbon, and soil carbon density was negatively related to LSI (p < 0.01) and AREA_MN (p < 0.05), but positively related to LPI (p < 0.05). Discussion. The urban forests were more fragmented in Harbin than in other provincial cities in Northeastern China, as shown by the smaller patch size, more complex patch shape, and larger patch density. The decrease in LSI along the rural-urban gradients may contribute to the forest carbon sequestrations in downtown regions, particularly underground soil carbon accumulation, and the increasing patch size may benefit tree carbon sequestration. Our findings help us to understand how forest landscape metrics are associated with carbon storage function. These findings related to urban forest design may maximize forest carbon sequestration services and facilitate in precisely estimating the forest carbon sink.
资助项目	One Hundred Talents Program in Chinese Academy of Sciences[Y3H1051001] ; Outstanding Youth Fund from Heilongjiang Province[JC201401] ; Ministry of Education of China[2572014EA01] ; Ministry of Education of China[2572017DG04] ; Key project from Chinese Academy of Sciences[KFZD-SW-302] ; NSFC[31670699] ; NSFC[41730641]
WOS关键词	AIR-POLLUTION ; UNITED-STATES ; GREEN SPACES ; IMPACTS ; STORAGE ; TREE ; SEQUESTRATION ; FRAGMENTATION ; URBANIZATION ; STREET
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	PEERJ INC
WOS记录号	WOS:000448497100005
资助机构	One Hundred Talents Program in Chinese Academy of Sciences ; Outstanding Youth Fund from Heilongjiang Province ; Ministry of Education of China ; Key project from Chinese Academy of Sciences ; NSFC
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/60463]
专题	中国科学院长春光学精密机械与物理研究所
通讯作者	Wang, Wenjie
作者单位	1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Northeast Forestry Univ, Harbin, Heilongjiang, Peoples R China 3.Chinese Acad Sci, Northeast Inst Geog & Agr Ecol, Changchun, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Wei,Zhang, Bo,Xiao, Lu,et al. Association of urban forest landscape characteristics with biomass and soil carbon stocks in Harbin City, Northeastern China[J]. PEERJ,2018,6:26.
APA	Zhou, Wei.,Zhang, Bo.,Xiao, Lu.,Wei, Chenhui.,He, Xingyuan.,...&Lv, Hailiang.(2018).Association of urban forest landscape characteristics with biomass and soil carbon stocks in Harbin City, Northeastern China.PEERJ,6,26.
MLA	Zhou, Wei,et al."Association of urban forest landscape characteristics with biomass and soil carbon stocks in Harbin City, Northeastern China".PEERJ 6(2018):26.