水土保持研究2024，Vol.31Issue(1)：290-300,11.DOI:10.13869/j.cnki.rswc.2024.01.004
江西和福建省植被覆盖时空特征及其地形梯度效应
Spatiotemporal Characteristics of Vegetation Coverage and Its Terrain Gradient Effect in Jiangxi and Fujian Provinces in South China
摘要
Abstract
[Objective]Exploration of the spatiotemporal characteristics of vegetation coverage in the South China region serves as a reference for ecosystem investigation and conservation.[Methods]Taking Jiangxi and Fujian provinces as examples,the vegetation cover of five years,including 1998,2005,2010,2015,and 2019,was divided into six levels from low to high levels.The spatiotemporal characteristics of vegetation coverage were analyzed using concepts such as dynamic degree and transfer in land use research,and its topo-graphic gradient effect was discussed.[Results](1)The vegetation coverage in Jiangxi and Fujian was main-ly high and extremely high(78.47％～89.8％),especially in the inland mountainous and hilly areas,while the densely populated urban areas along the river and coastal areas were relatively low coverage and small area;the vegetation coverage in this area was good and the overall trend of change was still increasing from 1998 to 2019.The most significant change occurred in 2010-2015 from high to very high coverage.(2)The terrain gradient index showed that the moderate vegetation coverage and below mainly distributed in grade 1～2 terrain gradient areas with an altitude of less than 200 m,a slope of less than 6° and a terrain position of less than 0.48.High vegetation coverage and above scattered in each terrain gradients,and with the increase of coverage,they tended to distribute in the terrain gradient areas of grade 3～5 with altitude higher than 200 m,slope higher than 6° and terrain level higher than 0.48.(3)In the category of unchanged or improved vegeta-tion coverage change,the low coverage transfer mainly occurred in the grade 1 terrain gradient,the low and medium coverage transfer mainly occurred in the grade 1～3 terrain gradient area,and the transfer of high coverage and above occurred in the five types of terrain gradient and is relatively scattered.In the category of vegetation coverage change as deterioration,the transfer of medium coverage and below mostly occurred in the terrain gradient area of grade 1～3,while the transfer of high coverage and above mostly occurred and relatively scattered in the terrain gradient area of grade 5.The large span of transfer level usually occurred in the lower grade terrain gradient area.[Conclusion]The vegetation coverage in the research area is relatively high,and there are spatial-temporal differences in vegetation coverage changes.Ecological system investiga-tion and protection need to consider the influencing factors under different terrain gradients.关键词
植被覆盖/时空特征/地形梯度/动态度/弦图/华南Key words
vegetation coverage/spatial-temporal characteristics/terrain gradient/dynamic degree/chord diagram/South China分类
社会科学引用本文复制引用
林莹冰,王小军,全明英,林杜锐,卢毅,刘光旭..江西和福建省植被覆盖时空特征及其地形梯度效应[J].水土保持研究,2024,31(1):290-300,11.基金项目
广东省科技创新战略专项资金攀登计划项目"近三千年来岭南地区重金属汞污染调查与潜在生态风险评估"(pdjh2020b0169) （pdjh2020b0169）
江西省教育厅科技项目"基于人工智能的赣南稀土矿区洪水灾害测度方法集成及其环境效应研究"(GJJ201419) （GJJ201419）
江西省高校人文社会科学研究规划项目"基于人工智能算法的洪灾管理适用策略研究"(GL20116) （GL20116）
