民勤湖区荒漠绿洲过渡带盐生植物群落空间分布及其指示意义
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1.黑龙江大学;2.中国科学院西北生态环境资源研究院

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研究所自主项目干旱区脆弱生态系统恢复和荒漠化可持续防治(E2550202);国家自然科学基金项目(42107513);武威市市级科技计划项目(WW2202YFS007)


Spatial distribution and ecological significance of halophyte communities in the desert-oasis transition zone of the Minqin Lake Area
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1.Northwest institute of Eco-Environment and Resources;2.,Heilongjiang University

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Restoration of Fragile Ecosystems in Arid Regions and Sustainable Desertification Control(E2550202), ,The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)(42107513), Wuwei Municipal Science and Technology Plan Project(WW2202YFS007)

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    摘要:

    摘要:盐生植物是民勤湖区荒漠绿洲过渡带重要的生态指示物种,探究盐生植物群落的空间分布规律及其影响因素对维护过渡带内脆弱生态系统修复和预测生态系统退化方向具有重要意义,而盐生植物群落空间分布特征、驱动机制以及对生态环境的指示意义仍不清楚。本文通过对民勤湖区荒漠绿洲过渡带152个样方的盐生植物进行系统调查,采用聚类分析、克里金空间插值和典范对应分析等方法,明确盐生植物群落的空间分布特征、影响因素及指示意义。主要研究结果如下:(1)研究区盐生植物主要包括盐爪爪+黑果枸杞群落、红砂+盐爪爪群落、白刺+黄花补血草群落、白刺群落、柠条锦鸡儿+沙鞭群落、沙蒿群落和禾草群落;(2)土壤电导率、含水率和含沙量是影响植物群落空间分布的主要因子,解释力分别为0.91、0.83和0.71;(3)土壤电导率与群落结构的相关性表明,盐爪爪+黑果枸杞群落,红砂+盐爪爪群落、白刺+黄花补血草群落和白刺群落,柠条锦鸡儿+沙鞭群落和沙蒿群落分别指示高盐环境(EC>8 dS/m )、中盐环境(8 dS/m>EC>4 dS/m)和低盐环境(4 dS/m>EC>2 dS/m);禾草群落指示中低盐环境。利用本研究建立的典型植物群落类型与盐渍化程度的对应关系,可为未来遥感技术预测植物群落时空动态、预测土壤变化过程及生态系统退化进程研究提供有益补充,更为维护西北干旱区生态系统稳态及盐渍化地区修复退化的生态系统提供有效策略。

    Abstract:

    Abstract: Halophytes are essential ecological indicator species in the desert-oasis transition zone of the Minqin Lake area. Exploring spatial distribution patterns and influencing factors of halophyte communities is crucial for ecosystem restoration and prediction of degradation trajectories of fragile ecosystems in the transition zone. However, there are still unclear aspects regarding the relationship between halophyte communities and spatial characteristics, driving mechanisms, and ecological significance. This study systematically surveys 152 halophyte sampling points in the desert-oasis transition zone of Minqin Lake and Two-way Indicator Species Analysis, Kriging Interpolation, and Canonical Correspondence Analysis to identify the spatial distribution, drivers, and ecological significance of halophyte communities. The main conclusions are as follows: (1) There are seven types of halophyte communities in the study area, namely Kalidium foliatum+Lycium ruthenicum community, Haloxylon ammodendron+Kalidium foliatum community, Nitraria tangutorum+Limonium aureum community, Nitraria tangutorum community, Caragana Caragana korshinskii+Psammochloa villosa community, Artemisia ordosica community and grass community; (2) Electrical Conductivity(EC), Soil Moisture Content(SMC), and Soil Content(SC) are the main factors influencing community distribution, with explanatory powers of 0.91, 0.83 and 0.71, respectively; (3) The correlation between EC and community structure indicates that Kalidium foliatum+Lycium ruthenicum community, Haloxylon ammodendron+Kalidium foliatum community, Nitraria tangutorum+Limonium aureum community, Nitraria tangutorum community, Caragana Caragana korshinskii+Psammochloa villosa community, Artemisia ordosica community, and grass community belongs to high salt (EC > 8 dS/m), middle salt (8 dS/m > EC > 4 dS/m) and lower salt (4 dS/m > EC > 2 dS/m) environment, respectively, while grass communities indicate a middle-low salinity environment. This study provides valuable insights for future remote sensing studies on the spatial-temporal dynamics of plant communities, soil changes, as well as ecological restoration, through establishing a corresponding relationship between plant community types and the degree of salinization.

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杨曦娅,薛娴,赵丹,高煜坤,吕勤勤,尤全刚,潘晶,孙元.民勤湖区荒漠绿洲过渡带盐生植物群落空间分布及其指示意义.生态学报,,(). http://dx. doi. org/[doi]

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