Spatial Distribution of Gynaephora menyuanensis under Different Grazing Intensities in Alpine Meadow

doi:10.11733/j.issn.1007-0435.2016.01.026

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (1): 191-197.DOI: 10.11733/j.issn.1007-0435.2016.01.026

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Spatial Distribution of Gynaephora menyuanensis under Different Grazing Intensities in Alpine Meadow

CHEN Ke-lu^1,3, YU Xin-chao^1,3, YAO Bu-qing¹, MA Zhen¹, WANG Wen-ying², WANG Hui-chun², ZHOU Hua-kun¹, ZHAO Xin-quan¹

1. Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, Qinghai Province 810008, China;
2. Academy of Life and Geography Science, Qinghai Normal University, Xining, Qinghai Province 810008, China;
3. University of the Chinese Academy of Science, Beijing 100049, China

Received:2014-12-09 Revised:2015-05-08 Online:2016-02-15 Published:2016-04-26

不同放牧强度下门源草原毛虫在高寒草甸上的空间分布

陈珂璐^1,3, 余欣超^1,3, 姚步青¹, 马真¹, 王文颖², 王慧春², 周华坤¹, 赵新全¹

1. 中国科学院西北高原生物研究所, 青海西宁 810008;
2. 青海师范大学生命与地理科学学院, 青海西宁 810008;
3. 中国科学院大学, 北京 100049

通讯作者: 周华坤
作者简介:陈珂璐(1993-),男,山西沁水人,硕士研究生,主要从事高寒草地全球变化生态学研究,E-mail:chenkelu@yeah.net
基金资助:
国家自然科学基金项目(31172247)(31201836)(31472135);青海省自然科学基金项目(2013-Z-916);中科院战略性先导科技专项子课题(XDA05070202);国家科技支撑课题专题(2011BAC09B06-02,2014BAC05B03);青海省重点实验室发展专项资金计划(2013-Z-Y07,2014-Z-Y01)资助

Abstract

Abstract:

Winter pasture, under grazing, moderate grazing and heavy grazing pastures were used as study plots in increasing order of grazing intensity in alpine meadow. 10 quadrats(0.5 m×0.5 m) at each plot were randomly selected. The vegetation height, coverage and population density vertical distribution height of Gynaephora menyuanensis in every quadrat were measured. Then the spatial distribution of G. menyuanensis was analyzed under different grazing intensities according to the spatial pattern indexes. The results showed that moderate grazing would increase the population density of Gynaephora menyuanensis,but overgrazing inhibited the density increase. The distribution of Gynaephora menyuanensis were gathered on both horizontal and vertical directions. The grazing disturbance did not change the aggregate distribution characteristics of the species, but could influence its clustering intensity by affecting its food and habitat.

Key words: Gynaephora menyuanensis, Interference of grazing, Density, Aggregation degree, Spatial distribution height

摘要：

按照放牧强度递增的顺序在高寒矮嵩草草甸上选取冬季自由放牧、轻牧、中牧、重牧4个样地,每个样地随机选取10个0.5m×0.5m的样方,对每个样方中的植被高度、盖度、虫口密度、毛虫的垂直分布高度等指标进行测定,根据空间分布指数对不同放牧强度下门源草原毛虫幼虫的空间分布情况进行分析。结果表明,适度的放牧干扰会增大门源草原毛虫的虫口密度,过度放牧则可抑制该物种密度的增大。门源草原毛虫在水平和垂直两个方向上均呈现聚集分布。放牧干扰不会改变该物种的聚集分布特征,但可通过对其食物及生境的作用,影响其聚集程度。

关键词: 门源草原毛虫, 放牧干扰, 虫口密度, 聚集度, 空间分布高度

CLC Number:

S812

CHEN Ke-lu, YU Xin-chao, YAO Bu-qing, MA Zhen, WANG Wen-ying, WANG Hui-chun, ZHOU Hua-kun, ZHAO Xin-quan. Spatial Distribution of Gynaephora menyuanensis under Different Grazing Intensities in Alpine Meadow[J]. Acta Agrestia Sinica, 2016, 24(1): 191-197.

陈珂璐, 余欣超, 姚步青, 马真, 王文颖, 王慧春, 周华坤, 赵新全. 不同放牧强度下门源草原毛虫在高寒草甸上的空间分布[J]. 草地学报, 2016, 24(1): 191-197.

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Spatial Distribution of Gynaephora menyuanensis under Different Grazing Intensities in Alpine Meadow

不同放牧强度下门源草原毛虫在高寒草甸上的空间分布

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