新疆博格达峰北坡岩面生壳状地衣的生态位特征  

Niche characteristics of saxicolous crustose lichens in the northern slope of Bogda peak,Xinjiang

作　　者：田雅楠 艾尼瓦尔·吐米尔[1] TIAN Yanan;TUMUR Anwar(College of Life Sciences and Technology,Xinjiang University,Urumqi B30046,China)

机构地区：[1]新疆大学生命科学与技术学院,乌鲁木齐830046

出　　处：《干旱区资源与环境》2021年第1期108-113,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(31660009)资助。

摘　　要：为了查明新疆博格达峰北坡岩面生壳状地衣群落中不同地衣种类对资源的利用情况及其分布规律,以15个样方内的岩面生壳状地衣盖度为对象,计算得到了21个种的生态位宽度、生态位相似系数和生态位重叠指数,并以生态位重叠为指标,利用主坐标排序(PCoA)法对他们进行分类。结果表明:包氏饼干衣(Rinodina bohlinii)具有最宽的生态位宽度(B_(i)=0.2765;B_(a)=1.5089);类锈美衣(Calogaya ferrugineoides)的生态位宽度最窄(B_(i)=0.1229;B_(a)=0.7613)。50.5%的种对间生态位相似系数<0.1,说明形成了生态分化。21个种地衣的生态位重叠值范围为(0~0.8562),生态位宽度最宽的包氏饼干衣与大多数地衣种的生态位重叠值都较高,生态位宽度最窄的类锈美衣与大多数地衣种的生态位重叠值也很低。PCoA结果将博格达峰北坡岩面生壳状地衣分为了4个生态类群。In order to understand better the resources utilization and distribution characteristics of saxicolous crustose lichens in the northern slope of Bogda peak,Xinjiang,China,the niche width and niche overlap indexes were calculated according to the 15 quadrat investigation data of saxicolous crustose lichens coverage.At the same time,the saxicolous lichens were classified by principal coordinate analysis(PCoA)method.The results showed that,the Levins and Shannon-Wiener niche breadth indexes of Rinodina bohlinii are the highest(B_(i)=0.2765;B_a=1.5089);Calogaya ferrugineoides has the narrowest niche width(B_(i)=0.1229;B_a=1.5089).The 50.5%of the species-pair niche similarity coefficients are less than 0.1,indicating that ecological differentiation has been formed.The niche overlap values of the 21 crustose saxicolous lichen species vary between 0~0.8562.R.bohlinii has a high niche overlap value with most other lichen species,while C.ferrugineoides has the lowest niche overlap value with most other species.According to PCoA results,the saxicolous crustose lichens on the northern slope of Bogda peak can be divided into four ecological groups.

关 键 词：岩面生壳状地衣 生态位宽度 生态位重叠 主坐标分析 

分 类 号：Q949.34[生物学—植物学]