环境因子对滇西北地区植物多样性分布格局的影响  

Effects of Environmental Factors on Spatial Patterns of Plant Diversity in Northwest Yunnan

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作  者:冯建孟 胡小康 FENG Jianmeng;HU Xiaokang(Dcpartmicnt of Agronomiy and Life Science,Daii University,Daii 671003,China.)

机构地区:[1]大理大学农学与生物科学学院,云南大理671003

出  处:《信阳师范学院学报:自然科学版》2019年第1期62-68,共7页Journal of Xinyang Teachers College(Natural Science Edition)

基  金:国家自然科学基金项目(31560178);云南省高校滇西北植物保护生物学科技创新团队平台。

摘  要:利用一元回归分析和偏回归分析,探讨了滇西北地区温、热带植物的分布格局及其控制因素.结果表明,温带植物多样性的高值主要出现在研究区域北部,而热带植物多样性则未呈现明显的纬度趋势.热带植物比重高值主要出现在研究区域南部,而温带植物比重高值主要出现在北部.生境异质性对温带植物多样性的解释率明显高于对热带植物多样性的解释率.这意味着,生境异质性对多样性格局的影响力可能在一定程度上取决于植物的生物地理分布区性质.气候因子对温、热带植物比重的解释率明显高于对温、热植物多样性的解释率.相比气候因子与温、热带植物多样性的关系,气候因子与温、热带植物比重之间关系可能更能反映滇西北地区温、热带植物的生态位保守性.Univariate and partial regressions were used to investigate the influences of predictors. Higher temperate speciesdiversity was mostly observedinthenorthernpartsof thestudyarea,whereas, noany obvious latitudinal trends were observed on tropical species diversity. Higher proportions of tropical species were observed inthesouthern parts,whereasthose oftemperate specieswereobservedinthenorthernparts. Habitat heterogeneity explained higher percentageof thespatialvariation oftemperatespecies diversitythanforthatof tropical species diversity. It may imply that the influcnce of habitat heterogeneity on plant divcrsity may be miodified by the taxa's biogcographic afinities. Higher percentages of variation in the proportions of tropical and tempcrate species than those of tropical and temperate spccics diversities were explained by climate predictors. It suggested that niche conservatism of tropicalandtemperate plantsinthestudyareawasmioreaccurately reflected by the associations between species diversity with tropical and temperate affinities and climatic conditions than those between the proportions of tropical and temperate plants and climatic conditions.

关 键 词:生物地理分布区性质 气候因子 生境异质性 滇西北 植物多样性 

分 类 号:Q948.1[生物学—植物学]

 

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