文献类型：期刊文献

中文题名：现代气候、古气候和生境异质性对新疆不同生长型种子植物多样性的影响

英文题名：Effects of current climate,paleoclimate and habitat heterogeneity on diversity of seed plants with different growth forms in Xinjiang of northwestern China

作者：许玥[1] 王文栋[2] 姚杰[1] 黄继红[1] 臧润国[1]

第一作者：许玥

机构：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091;[2]新疆维吾尔自治区林业科学院森林生态与园林绿化研究所,新疆乌鲁木齐830063

年份：2025

卷号：47

期号：10

起止页码：1-10

中文期刊名：北京林业大学学报

外文期刊名：Journal of Beijing Forestry University

收录：;北大核心:【北大核心2023】；

基金：国家自然科学基金项目(42271069);国家重点研发计划课题(2023YFE0112801)。

语种：中文

中文关键词：干旱区;环境因子;空间格局;物种丰富度

外文关键词：arid areas;environmental factors;spatial patterns;species richness

分类号：S717;P935.1

摘要：【目的】干旱地区对全球气候变化非常敏感,而植物对于维持干旱生态系统的稳定性具有重要作用,开展干旱区不同生长型(乔木、灌木和草本)植物分布格局和影响因素的研究有助于全球变化背景下干旱区植物多样性和植被保护策略的制定。【方法】以新疆维吾尔自治区为研究区域,基于3716种种子植物的50 km×50 km网格地理分布数据,结合广义线性模型和等级方差分离等方法,分析不同生长型种子植物多样性的地理分布格局。同时,评估现代气候(年均温、年降水量、最冷季均温、最干季降水量、温度季节性和降水季节性)、古气候(末次盛冰期以来年均温偏离值、年降水偏离值、年均温变化速率和年降水量变化速率)和生境异质性(海拔、年均温和年降水变化范围)对物种丰富度格局的影响。【结果】(1)新疆种子植物及不同生长型植物(乔木、灌木和草本)物种丰富度较高的地区多集中在北部山区;(2)不同生长型植物多样性主要受现代气候的影响(尤以降水相关因子最为显著),其次为生境异质性,而古气候的作用最弱;(3)环境因子对草本、灌木和乔木植物物种多样性空间格局的影响程度依次减弱,对乔木、灌木和草本物种多样性解释力最高的因子分别是降水季节性、最干季降水量和最干季降水量。【结论】不同生长型植物对环境因子的响应存在显著差异,应将其纳入生物多样性研究框架。结果进一步凸显了降水对干旱地区植物多样性的关键作用,为脆弱生态系统的保护与管理提供了理论支持。
[Objective]Arid areas are highly vulnerable to global climate change.Plant species play an important role in maintaining the stability of dryland ecosystems.Research on species distribution patterns of different growth forms in arid regions,as well as their influencing factors is crucial for formulating effective strategies for biodiversity and vegetation conservation.[Method]Here,we took Xinjiang in northwestern China as a case to investigate the diversity patterns of different growth forms of seed plant species and their relationship with environmental factors.We established the geographic distribution database with the resolution of 50 km by 50 km of 3716 native seed plants in Xinjiang.By integrating generalized linear model and hierarchical variation partitioning,we identified the relative importance of current climate(mean annual temperature(MAT),mean annual precipitation(MAP),mean temperature of the coldest quarter,precipitation of the driest quarter,temperature seasonality,and precipitation seasonality),paleoclimate(MAT anomaly,MAP anomaly,MAT changing rate,MAP changing rate)and habitat heterogeneity(elevation range,MAT range,MAP range)in shaping the species diversity of different growth forms(trees,shrubs,and herbs)among seed plants.[Result](1)The results revealed that areas of higher richness of seed plant diversity,as well as the diversity of trees,shrubs,and herbs were predominantly concentrated in mountainous regions in northern Xinjiang.(2)The diversity of species across different growth forms(trees,shrubs,and herbs)was primarily influenced by contemporary climate variables,particularly those related to precipitation,followed by habitat heterogeneity,whereas the effect of paleoclimate was the least significant.(3)The relative importance of environmental factors in shaping the spatial pattern of plant species diversity was most evident in the order of herbaceous plants,shrubs and trees.Among these,the factors explaining the highest proportion of diversity variation were precipitation seasonality for trees,and the precipitation of the driest quarter for shrubs and herbs.[Conclusion]These findings demonstrate that plants of different growth forms have significant differences in their responses to environmental factors,which should be integrated into the framework of biodiversity research.Furthermore,the results underscore the critical influence of precipitation on plant diversity in arid regions,offering theoretical support for the conservation and management of fragile arid ecosystems.