基于遥感技术分析乌鲁木齐市城市森林景观格局及碳储量特征

Research on the urban forest landscape pattern and carbon storage characteristics in Urumqi using remote sensing technology

  • 摘要: 【目的】 研究乌鲁木齐市城市不同森林类型的景观格局特征,分析乌鲁木齐市城市森林的基本生态学特征,探究乌鲁木齐市森林碳储量与碳密度的空间分布特征。 【方法】 以城市森林乔木为研究对象,基于遥感技术结合野外实地调查样地数据,通过生物量转换法计算碳储量,通过ArcGIS软件与Fragstates 4.2软件计算景观格局指数。 【结果】 乌鲁木齐市城市森林乔木的胸径范围主要集中分布在4~14 cm,树高大小主要分布于3~5 m与6~8 m。乌鲁木齐市城市森林整体碳储量为348.57×103 t,不同城市森林类型碳储量之间大小关系为风景游憩林>道路林>生态公益林>附属林>生产经营林。碳密度的大小关系为生产经营林>附属林>风景游憩林>道路林>生态公益林。乌鲁木齐市碳密度整体以中心点向北呈现先降低再升高的趋势,向南呈现降低的趋势。 【结论】 乌鲁木齐市城市森林景观格局主要受到城市化进程的影响。乌鲁木齐市城市森林结构以中幼龄林占主导地位,仍然具备相当大的生态发展潜力。碳密度在空间分布与干旱绿洲环境以及特殊地形有直接关系。

     

    Abstract: 【Objective】 The aim of this study is to examine the landscape patterns of various forest types in Urumqi, analyze the fundamental ecological features of urban forests, and investigate the spatial distribution characteristics of carbon storage and carbon density in these forests. 【Methods】 This article focused on the arbors of urban forests as the research subject, utilized remote sensing technology combined with field survey data, employed biomass conversion methods to calculate carbon stocks, and utilized ArcGIS software and Fragstates 4.2 software to calculate landscape pattern indices. 【Results】 The results showed that the chest diameter range of Urumqi urban forest trees was mainly distributed between 4 cm and 14 cm, while tree height was predominantly distributed in the intervals of 3-5 m and 6-8 m.In Urumqi, the urban forest stored a total of 348.57×103 t of carbon, with scenic recreation forests having the largest carbon storage size, followed by road forests, ecological public welfare forests, affiliated forests, and production and operation forests.The carbon density was the highest in production and operation forests, followed by affiliated forests, scenic recreation forests, road forests, and ecological public welfare forests.The carbon density exhibited a pattern of decrease followed by increase from the center to the north, and a decrease towards the south.Carbon storage was found to be greater in the southern region than in the northern region. 【Conclusion】 The urban forest landscape of Urumqi is predominantly shaped by the process of urbanization.The dominant forest structure in Urumqi consists of young and middle-aged forests, indicating significant ecological development potential.The spatial distribution of carbon density is directly linked to the arid oasis environment and unique topography.

     

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