| 基于功能性状及系统发育的乌鲁木齐达坂城山区地衣群落构建机制 |
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| 引用本文： | 李作森,艾尼瓦尔 ,吐米尔.基于功能性状及系统发育的乌鲁木齐达坂城山区地衣群落构建机制[J].菌物学报,2022,41(9):1441-1457. |
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| 作者姓名： | 李作森 艾尼瓦尔 吐米尔 |
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| 作者单位： | 新疆大学生命科学与技术学院,新疆 乌鲁木齐 830046 |
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| 基金项目： | 国家自然科学基金(31660009) |
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| 摘 要： | 选取达坂城山区地衣群落为研究对象,在野外设置了30个样方,调查样方内地衣物种。利用分子标记构建系统发育树,检验功能性状的系统发育信号,计算地衣群落净谱系亲缘关系指数(net relatedness index,NRI)和最近种间亲缘关系指数(nearest taxon index,NTI),探讨地衣群落构建机制,结合典范对应分析(CCA)等方法探讨达坂城山区地衣群落构建的主要环境驱动因子。结果表明：达坂城山区调查发现地衣共有111种,隶属14目、25科、48属。生长形式、光生物类型、繁殖方式、繁殖结构和基物类型5种功能性状均具有显著的系统发育信号(P<0.05),具有谱系保守性。不同海拔梯度群落系统发育结构不同,在低海拔区域,环境干旱,具有干扰,谱系随机至弱发散结构,环境过滤和相似性限制共同作用于群落;在中海拔区域,湿度适中,风速低,人为干扰较弱,地衣群落的谱系结构聚集,环境过滤在群落中起主导作用;而在高海拔区域,环境湿度高,风速强,无人为干扰,群落谱系发散,相似性限制在群落中起主导作用。其中,海拔和物种丰富度呈显著正相关,风速和湿度对系统发育指数有显著影响,海拔、湿度、风速和人为干扰对部分功能性状有显著影响。海拔、湿度和风速作为主要的环境筛影响研究区地衣群落构建过程。
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| 关 键 词： | 系统发育结构 系统发育信号 群落构建机制 达坂城山区 |
| 收稿时间： | 2022-02-14 |
Mechanism of lichen community assembly based on functional traits and phylogeny of lichens in mountainous area of Dabancheng,Urumqi, Northwest China |
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| Authors: | LI Zuosen ANWAR Tumur |
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| Affiliation: | College of Life Science and Technology, Xinjiang University, Urumqi 830046, Xinjiang, China |
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| Abstract: | The lichen community was investigated at 30 plots in the Dabancheng mountainous area. Phylogenetic tree was constructed by using molecular markers, and the phylogenetic signal of functional traits was tested, and the net relatedness index (NRI) and nearest taxon index (NTI) of the lichen community were computed to explore lichen community assembly mechanism. In addition, the important environmental driving factors of lichen community in the Dabancheng mountainous area were clarified by canonical correspondence analysis (CCA) and others methods. In total, 111 species of lichens were identified in the Dabancheng mountainous area, belonging to 14 orders, 25 families and 48 genera. Lichen functional traits showed significant phylogenetic signal (P<0.05), with lineage conservation. The phylogenetic structure of community varied with altitude gradients. The species community phylogenetic structure was nearly random to weakly dispersive at low-altitude areas where the humidity was low and the environment was disturbed, and habitat filtration and similarity limitation jointly acted on community assembly. Species community structure was phylogenetically clustered at mid-altitude, where the humidity was moderate, wind speed was weaker, artificial disturbance was less, and habitat filtration played a primary role in community assembly. Species community structure was phylogenetically overdispersed at high-altitude areas, where the humidity was high, wind speed was strong, artificial disturbance was almost free, and similarity limitation dominated community assembly. There was positive correlation between the altitude and species richness. Wind speed and humidity significantly affected the phylogenetic index, while altitude, humidity, wind speed and human disturbance significantly affected some functional traits. In conclusion, altitude, humidity and wind speed as the main environmental sieve significantly affected the assembly process of lichen community in the Dabancheng mountainous area. |
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| Keywords: | phylogenetic structure phylogenetic signal community assembly mechanism Dabancheng mountainous area |
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