粤北南雄盆地县域土地利用变化与生境质量演变  

Land Use Change and Habitat Quality Evolution at County Level in Nanxiong Basin,Northern Guangdong Province

作　　者：邓光蔓 杨现坤 徐国良 符加方 莫凌梓 杨漫 凌雨楠 李俐宽 李委庭 蔡志云 Deng Guangman;Yang Xiankun;Xu Guoliang;Fu Jiafang;Mo Lingzi;Yang Man;Ling Yunan;Li Likuan;Li Weiting;Cai Zhiyun(School of Geography and Remote Sensing,Guangzhou University,Guangzhou 510006,China;Guangdong Province Rural Water Environment Non-point Source Pollution Comprehensive Treatment Engineering Technology Center,Guangzhou 510006,China;Nanxiong Natural Resources Bureau,Shaoguan 512400,Guangdong,China)

机构地区：[1]广州大学地理科学与遥感学院,广州510006 [2]广东省农村水环境面源污染综合治理工程技术研究中心,广州510006 [3]南雄市自然资源局,广东韶关512400

出　　处：《中国城市林业》2024年第4期139-146,共8页Journal of Chinese Urban Forestry

基　　金：2024年度市校[院]企联合资助项目(2024A03J0386);南雄市红砂岭综合治理工程监测分析与评价项目(ZPSG2020ZB010,ZPSG2020ZB045);广州大学大学生创新训练项目(20231078005)。

摘　　要：南雄位于广东省“一核一带一区”发展格局中的北部生态发展区,是广东省重要生态屏障的组成部分,但由于早期不合理的农耕发展生成了大量的未利用地,对生境质量造成负面影响。基于2000、2005、2010、2015和2020年的土地利用数据,运用InVEST模型,对4个周期(2000—2005年、2005—2010年、2010—2015年、2015—2020年)的生境质量演变特征进行评价,并利用生境质量贡献率探究影响生境质量变化的土地利用转移类型。结果表明:1)2000—2020年南雄市土地利用变化以耕地与林地之间的相互转化以及耕地转化为建设用地为主;2)南雄市生境质量呈现先上升后下降的趋势,中部丘陵生境质量低,西北部以及东南部高山是高生境质量的分布区;3)2000—2020年,耕地向林地转化是研究区生境质量提升的最主要原因,林地向耕地转化以及耕地向建设用地转化是研究区生境质量下降的主要原因。因此,协调林地与耕地、耕地与建设用地之间的转化将会有效缓解南雄市生境质量下降问题。Nanxiong is situated in the northern ecological development zone in Guangdong Province's “one core,one belt,and one region” development pattern,and it constitutes a crucial part of the ecological barrier in Guangdong Province.Nonetheless,the unreasonable agricultural practices in history have led to a substantial amount of unused land,detrimentally impacting habitat quality.With the land use data in 2000,2005,2010,2015,and 2020,the InVEST model is used for evaluating the evolutionary attributes of habitat quality in Nanxiong City in the four time cycles(2000—2005,2005—2010,2010—2015,and 2015—2020).The rate of the contribution to habitat quality is employed to discuss the types of land use transfer that influence the changes of habitat quality.The findings reveal:1) Between 2000 and 2020,the predominant types of land use transfer in Nanxiong City were the conversion between cultivated land and forest land and the transfer from cultivated land to construction land;2) The trajectory of habitat quality in Nanxiong City presents an initial increase followed by a subsequent decline.The hills in the central area exhibit low habitat quality,whereas the high mountains in the northwest and southeast embrace the areas characterized with high habitat quality;and 3) The conversion from cultivated land to forest land is the principal driver for the amelioration of habitat quality in the study area from 2000 to 2020.Conversely,the conversions from forest land to cultivated land and from cultivated land to construction land are the primary contributors to the decline in habitat quality within the study area.Thus,harmonizing the conversions between forest and cultivated land and between cultivated land and construction land will effectively curb the decline of habitat quality in Nanxiong City.

关 键 词：土地利用变化 InVEST模型 生境质量 南雄市 

分 类 号：X24[环境科学与工程—环境科学] F301.24[经济管理—产业经济]