内蒙古不同草地类型群落物种多度分布格局分析

发布时间：2018-06-14 17:20

本文选题：不同草地类型 + 物种多度分布格局　；参考：《中国草地学报》2017年05期

【摘要】：以内蒙古三种不同草地类型为研究对象,通过野外植被调查,按照不同功能群将草地植物进行划分,并应用生态位重叠模型(ONM)、生态位优先占领模型(NPM)、断棍模型(BSM)、优势优先模型(DPM)和随机分配模型(RAM)与群落植物物种进行拟合,按照拟合程度分析草甸草原、典型草原和荒漠草原三种不同草地类型植物群落物种多度分布格局。结果表明:断棍模型可以较好地拟合荒漠草原(χ~2=224.18,AIC=277.05,BIC=281.16)和草甸草原(χ~2=186.57,AIC=303.13,BIC=307.53)植物群落植物多度格局,而典型草原的群落植物真实多度与生态位优先占领模型(χ~2=22.29,AIC=246.17,BIC=250.27)吻合度高。在不同草地群落中,生长季降水量的多少对多度格局起关键作用,生长季明显的降水量变化会对草地群落造成影响,但建群种的优势地位不会发生改变。
[Abstract]:Taking three different grassland types in Inner Mongolia as the research object, grassland plants were divided according to different functional groups through field vegetation investigation. The niche overlap model (ONMN), niche priority occupation model (NPM), BSMN model, dominant priority model (DPMM) and random allocation model (Ram) were used to fit the plant species. The meadow grassland was analyzed according to the fitting degree. Species abundance distribution pattern of three different grassland types in typical steppe and desert steppe. The results showed that the model could fit the plant abundance pattern of desert steppe (蠂 ~ (224.18) ~ (18) AICI ~ (277.05) and meadow steppe (蠂 ~ (2) 186.57 ~ (7) AIC-303.13BIC-307.53), and the true plant abundance of typical grassland was in good agreement with the niche priority occupation model (蠂 ~ (22. 29) AICI ~ (246.17) BIC ~ (250.27). In different grassland communities, the amount of precipitation in growing season plays a key role in the abundance pattern. The obvious precipitation change in growing season will affect the grassland community, but the dominant position of the species will not change.
【作者单位】：内蒙古农业大学草原与资源环境学院;
【基金】：内蒙古温性草原牧区“生产生态生活”优化保障技术集成与示范(2012BAD13B02) 牧区优质高效饲草生产利用技术研究示范项目(201003024)
【分类号】：S812

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