东乌珠穆沁旗天然草地地上生物量与物种数的空间变化

Spatial Variation of Aboveground Biomass and Species Number of Natural Grassland in East Ujimqin Banner

为给东乌珠穆沁旗草地环境保护和草地畜牧业可持续发展提供数据支持和理论支撑,以东乌珠穆沁旗2020年调查数据为基础,采用地统计及拟合函数等研究方法,对东乌珠穆沁旗天然草地地上生物量与物种数的空间变化特点及相互关系进行了研究。结果表明,东乌珠穆沁旗草地物种数单位均值上的变异程度高于地上生物量,但空间异质性地上生物量略高于物种数;物种数空间分布的自相关尺度大于地上生物量,前者主要表现为经度上的变化规律,后者在经纬度上均存在相应变化特点;当物种数小于14种时伴随物种数的增大地上生物量急剧增加,当物种数大于14种时多物种效应呈单峰曲线变化形式。

In order to explore the spatial variation characteristics and the relationship between aboveground biomass and species number of natural grassland in East Ujimqin banner,and provide the data support and theoretical support for grassland environmental protection and sustainable development of grassland animal husbandry in East Ujimqin banner,a study based on the survey data of East Ujimqin banner in 2020,and using the research methods of geostatistics and fitting function was conducted,the results were as follows:In East Ujimqin banner,the variation degree of species number per unit mean was higher than that of aboveground biomass,but the spatial heterogeneity aboveground biomass was slightly higher than that of species number.The autocorrelation scale of the spatial distribution of species number was larger than that of aboveground biomass,and the former is mainly manifested as the change rule of longitude,while the latter had corresponding change characteristics in longitude and latitude.When the number of species was less than 14,the aboveground biomass increased sharply with the increase of species number;while the number of species was more than 14,the multi-species effect showed a single peak curve.