江西菊科植物多样性的地理格局及环境相关性  

Geographical pattern and environmental correlation of Asteraceae diversity in Jiangxi Province

作　　者：刘洋洋 程艳梅 何梦婷 戈毓枫 彭伟龙 周亚东 龙春英[3] LIU Yangyang;CHENG Yanmei;HE Mengting;GE Yufeng;PENG Weilong;ZHOU Yadong;LongChunying(School of Life Sciences,Nanchang University,Nanchang 330031,China;People's Government of Shishan Township,Taihe County,Ji'an Jiangxi 343703,China;Architecture and design college,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学生命科学学院,江西南昌330031 [2]泰和县石山乡人民政府,江西吉安343703 [3]南昌大学建筑与设计学院,江西南昌330031

出　　处：《南昌大学学报(理科版)》2025年第2期119-127,共9页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(32260046);江西省文化艺术科学规划一般项目(YG2022062)。

摘　　要：作为被子植物中最大的科之一的菊科(Asteraceae)兼具重要生态功能与经济价值,其地理分布格局与环境适应机制研究备受关注。通过植物标本、植物志及文献资料的系统整合,构建江西省菊科植物县级分布数据库(含本地种与外来种),结合年平均气温(AMT)、海拔(Altitude)、植被归一化指数(NDVI)、人类干扰指数(HII)等9个环境因子,分析了物种丰富度地理格局及其与环境因素的关系。结果表明:①江西省总体及本地菊科植物物种丰富度呈现“周边高-中北部低”的分布格局,而外来菊科植物物种丰富度格局较本地物种更为均匀;②本地与外来物种丰富度均随海拔升高呈单调递增趋势;③回归分析显示,非生物因素海拔和年平均气温对本地物种的物种丰富度的解释力高于外来物种,在一定程度上能说明外来菊科植物抗环境因子能力大于本地菊科植物;④结构方程模型表明,本地菊科植物主要受年平均气温和植被归一化指数的直接影响,而外来植物主要受人类干扰指数和植被归一化指数的直接影响。研究结果为理解江西本地与外来菊科植物分布差异机制以及物种共存提供依据。The Asteraceae,as one of the largest families within angiosperms,holds significant ecological functions and economic value.Research on its geographical distribution patterns and environmental adaptation mechanisms has garnered considerable attention.By systematically integrating plant specimens,floras,and literature,a county-level distribution database of Asteraceae species in Jiangxi Province(including indigenous and exotic species)was constructed.Combined with nine environmental factors such as annual mean temperature(AMT),altitude,normalized difference vegetation index(NDVI),and human interference index(HII),the geographical patterns of species richness and their relationships with environmental factors were analyzed.The results indicated:①The species richness of total Asteraceae in Jiangxi Province,as well as that of indigenous Asteraceae,exhibited a"high in peripheral regions and low in central-northern regions"distribution pattern,while the species richness pattern of exotic Asteraceae was more uniform compared to indigenous Asteraceae.②The species richness of indigenous and exotic Asteraceae showed a monotonically increasing trend with altitude.③Regression analysis revealed abiotic factors(altitude and AMT)exhibited higher explanatory power for indigenous Asteraceae than for exotic Asteraceae,suggesting that exotic Asteraceae may possess greater resistance to environmental factors compared to indigenous Asteraceae.④Structural equation modeling demonstrated that AMT and NDVI directly affected the richness of indigenous Asteraceae,while HII and NDVI directly affected the richness of exotic Asteraceae.This study provides insights into the mechanisms underlying the distribution differences and species coexistence between indigenous and exotic Asteraceae in Jiangxi Province.

关 键 词：菊科植物 物种丰富度 环境因子 江西省 

分 类 号：Q948.2[生物学—植物学]