摘要
基于Landsat数据,提取了乌蒙山自然保护区2005年、2011年、2019年植被覆盖信息,用像元二分模型法反演了植被覆盖度(FVC),利用Fragstats 4.2软件计算了保护区不同等级植被覆盖度及不同植被覆盖类型的景观格局指数,分析2005—2019年的变化特征。结果表明,研究区整体植被覆盖类型主要以阔叶林为主,2005—2019年间占比从56%增加到60%;研究区整体植被覆盖度较高,以中高、高植被覆盖度为主,植被覆盖度整体呈上升趋势,2005年、2011年、2019年不同时期中高、高植被覆盖区分别占该区总面积的78.41%、75.59%、83.22%,FVC均值从65.14%上升到了73.3%;从景观格局来看,保护区植被覆盖类型、植被覆盖度整体景观破碎度再降低,不同植被类型斑块整体上变化不大、斑块形状越来越规则,不同等级植被覆盖度分布较集中,混杂度、多样性下降。
Based on Landsat data,vegetation coverage information of Wumeng Mountain Nature Reserve in 2005,2011,and 2019 was extracted.The pixel binary model was used to invert the fractional vegetation coverage(FVC),the Fragstats 4.2 software was used to calculate the landscape pattern index of different levels and types of vegetation coverage in the reserve,and analyzed the characteristics of changes from 2005 to 2019.The results showed that the overall vegetation coverage type in the study area was mainly broad-leaved forest,increasing from 56%to 60%from 2005 to 2019;the overall vegetation coverage in the study area was higher,dominated by medium-high and high vegetation coverage,and the overall vegetation coverage showed an upward trend,and medium-high and high vegetation coverage areas respectively accounted for 78.41%,75.59%and 83.22%of the total area in 2005,2011 and 2019,and the mean value of FVC increased from 65.14%to 73.3%;from the perspective of landscape pattern,the overall landscape fragmentation degree of the vegetation coverage types and vegetation coverage was decreased again,the patches of different vegetation types changed little on the whole and the patch shape became more and more regular,the distribution of vegetation coverage of different levels was relatively concentrated,and the confounding degree and diversity were decreased.
作者
廖正杭
陈婷
赵永丽
李伟
杨科
LIAO Zhenghang;CHEN Ting;ZHAO Yongli;LI Wei;YANG Ke(Administration of Yunnan Wumeng Mountain National Nature Reserve,Zhaotong,Yunnan 657000,China)
出处
《林业调查规划》
2025年第1期95-103,共9页
Forest Inventory and Planning
基金
云南乌蒙山国家级自然保护区2022年中央财政林业草原生态保护恢复资金项目.
关键词
景观格局
植被覆盖
时空变化特征
乌蒙山保护区
landscape pattern
vegetation coverage
temporal and spatial evolution characteristics
Wumeng Mountain Nature Reserve
