生态环境学报2024，Vol.33Issue(11)：1708-1716,9.DOI:10.16258/j.cnki.1674-5906.2024.11.005
封育对退化河岸草地植物多样性和植被景观的影响
Effects of Enclosure on Plant Diversity and Vegetation Landscape in Degraded Riparian Grassland
摘要
Abstract
Ecosystem plant diversity and vegetation cover are seriously threatened by human activities,and a full understanding of the degradation process is key to achieving restoration of degraded ecosystems.Enclosure is a simple and effective strategy to restore damaged grassland ecosystems.However,the effects of different enclosure periods on plant diversity and landscape patches in degraded riparian grasslands are unclear.In the Liao River,the first riverine fenestration area established in China,as the study area,21 monitoring sample sites were set up along the riverbank,and the density,cover,and species of riparian grassland were recorded for 13 consecutive years to explore the changes in plant community structure,species diversity,and vegetation landscape characteristics and their interrelationships under the degradation of riparian grassland to provide a theoretical basis for the management of grassland degradation in the riparian zone and the years of degradation of the degraded grassland for restoration.The results showed that(1)species richness and diversity increased significantly(p<0.05)with increasing enclosure years,and species richness,Shannon-Wiener index,Pielou homogeneity index,and Simpson dominance index peaked after 12 years of enclosure at 36,2.87,0.81,and 1.02,respectively.(2)The dissimilarity in community species composition increased with the number of years since enclosure.The eighth-year enclosure exhibited greater dissimilarity in species composition than the other enclosure years(p<0.05).The dominant plant species in the closed Liao River area were Compositae,Gramineae,and Leguminosae.(3)After the establishment of the reserve,vegetation patches dominated by natural landscapes were evenly distributed,vegetation coverage increased by 10.71%,and the degree of landscape fragmentation increased by 42.18%.In addition,riparian plant species diversity was positively correlated with vegetation coverage(p<0.001),whereas plant species diversity was negatively correlated with landscape fragmentation(p<0.001).In conclusion,12 years of enclosure model improved the species diversity,species composition,and vegetation coverage of degraded riparian vegetation.关键词
河岸植被/生态封育/物种多样性/植被覆盖/景观破碎化Key words
riparian vegetation/ecological enclosure/species diversity/vegetation cover/landscape fragmentation分类
农业科技引用本文复制引用
崔盼盼,于洋,曲波,苏芳莉..封育对退化河岸草地植物多样性和植被景观的影响[J].生态环境学报,2024,33(11):1708-1716,9.基金项目
辽宁省教育厅项目"辽宁省湿地生态系统碳汇能力提升研究平台"(JYTPT2024001) （JYTPT2024001）
国家重点研发计划项目(2022YFF1301004) （2022YFF1301004）
