草业科学2024，Vol.41Issue(7)：1571-1582,12.DOI:10.11829/j.issn.1001-0629.2023-0107
内蒙古荒漠草原区不同弃耕地植物物种生态位
Study of ecological niches of plant species in different abandoned arable land in desert grassland areas of Inner Mongolia
摘要
Abstract
Ecological niche characteristics can accurately reflect the interrelationships among plant populations.To study the influence of abandonment years on the ecotone characteristics of plant species,three treatments of 5,15,and 20 years of abandonment were selected in the desert grassland in Inner Mongolia.Natural grassland was used as the control.Shannon-Wiener ecotone width index and Pianka ecotone overlap index of plant populations were analyzed to explore the succession pattern of plant community composition in the abandoned cropland.The succession pattern of plant community composition in the abandoned crop was investigated by analyzing these indices.Species with a higher importance in the succession stage of abandoned plowing gradually changed from first-and second-year plants to perennial grasses.Species with the largest ecotone width also changed from annuals to perennials but still differed from those with the largest ecotone width in natural grassland.The overlap of ecological niches between 20 years of abandonment and natural grassland was higher than between 5 and 15 years of abandonment.The overlap of ecological niches between 15 years of abandonment was mainly between Artemisia scopari and Neopallasia petinata.The largest overlap of ecological niches between natural grassland and 20 years of abandonment was between species pairs Stipa breviflora and N.petinata.Therefore,with the increase in the number of years of abandonment,the characteristics of the plant community in the abandoned land gradually succeeded to the direction of natural grassland.关键词
荒漠草原/弃耕演替/优势种/生态位宽度/生态位重叠/物种重要值/天然草地Key words
desert steppe/succession of abandoned fields/dominant species/niche width/niche overlap/species important value/natural grassland引用本文复制引用
王文琼,张峰,郑佳华,李邵宇,何江峰,杨立山,张彬,赵萌莉..内蒙古荒漠草原区不同弃耕地植物物种生态位[J].草业科学,2024,41(7):1571-1582,12.基金项目
科技部基础资源调查项目(SQ2019FY010072) （SQ2019FY010072）
国家自然科学基金项目(31861143001) （31861143001）
内蒙古自治区自然科学基金项目(2020ZD03) （2020ZD03）
内蒙古自治区科技计划项目(2019ZD008) （2019ZD008）
内蒙古自治区科技计划项目"草原家畜可持续经营管理体系建立" （）
