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嘉峪关草湖湿地植物谱系结构及其对不同生境的响应

赵连春1,2,段凯祥2,赵成章2*,王继伟2,文军2   

  1. 1西北师范大学化学化工学院, 生态环境相关高分子材料教育部重点实验室, 兰州 730070;2西北师范大学地理与环境科学学院, 甘肃省湿地资源保护与产业发展工程研究中心, 兰州 730070)
  • 出版日期:2020-07-10 发布日期:2021-01-09

Responses of phylogenetic structure of plant to different habitats in Jiayuguan Caohu Wetland.

ZHAO Lian-chun1,2, DUAN Kai-xiang2, ZHAO Cheng-zhang2*, WANG Ji-wei2, WEN Jun2   

  1. (1College of Chemistry and Chemical Engineering, Key Laboratory of Eco-Environment Related Polymer Materials of Ministry of Education, Lanzhou 730070, China; 2College of Geography and Environmental Science, Northwest Normal University, Research Center of Wetland Resources Protection and Industrial Development Engineering of Gansu Province, Lanzhou 730070, China).
  • Online:2020-07-10 Published:2021-01-09

摘要: 植物群落中植物物种谱系结构与生境的关系是生态学研究的重要内容,对于揭示物种环境适应机制、群落构建机制等具有重要意义。为研究局域尺度上干旱区湿地、沙丘、戈壁等生境植物的环境适应机制,在嘉峪关草湖国家湿地公园内,基于物种谱系树,研究了荒漠区沼泽、盐沼、沙丘、戈壁等不同生境条件下的植物谱系结构及其变化规律。结果表明:随着生境条件的改变,土壤含水量、含盐量、容重、pH值等土壤性质发生显著变化;植物的谱系结构发生适应性的变化,沙丘的谱系多样性指数最高,盐沼次之,戈壁、沼泽的谱系多样性指数最低;不同生境的物种具有不同的谱系结构,沼泽、沙丘、戈壁生境的物种谱系结构为聚集模式,盐沼无明显谱系结构;局域尺度上,环境过滤作用是影响沼泽、沙丘、戈壁生境物种分布的主要影响因子,竞争排斥和生境过滤作用共同影响着盐沼生境物种的分布。

关键词: 施肥模式, 土壤真菌, 土层, 雷竹林, 群落特征

Abstract: The relationship between plant phylogenetic structure and habitats is an important topic in ecology, which can reveal the mechanisms underlying plant adaptation to environment and community assemblage. To clarify the adaptation of plants to different habitats across wetland, sand dune and gobi at the local scale in arid area, we examined plant phylogenetic structure and its change in different habitats across marsh, salt marsh, sand dune, and gobi in Jiayuguan Caohu National Wetland Park. The results showed that soil moisture, salt content, bulk density, and pH significantly differed across habitats. Consequently, plant phylogenetic structure changed adaptively. The pedigree diversity index of plants in sand dune was the highest, followed by salt marsh, and the lowest for gobi and marsh. Plant species in different habitats had different phylogenetic structure, with the phylogenetic structure in marsh, sand dune and gobi habitats being under aggregation mode and no obvious phylogenetic structure in salt marsh. At the local scale, environmental filtering was the main factor affecting species distribution in marsh, sand dune, and gobi, while both competition exclusion and habitat filtering affected species distribution in salt marsh.

Key words: soil fungi, Phyllostachys violascens stand,  , soil layer., fertilization mode, community characteristic