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放牧对高寒小嵩草草甸冷季草场主要植物种群生态位的影响
Effects of Grazing on the Major Plant Populations Niche in Alpine Kobrecia parva Meadow Cold-seasonal Pastureland

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董全民 1   赵新全 1   马玉寿 2   施建军 2   王彦龙 2  
文摘 对高寒小嵩草草甸冷季草场主要21种植物种群在不同放牧率下优势度、生态位宽度及生态位重叠规律的研究结果表明:1)经过两年的放牧,对照、轻度和中度放牧组的主要优势种均为小嵩草和垂穗披碱草,重度放牧组的主要优势种变成了小嵩草和鹅绒委陵菜;2)尽管枯草期小嵩草和高原早熟禾的适口性较好而被优先采食,但由于它们特有的耐牧、耐践踏等生物学特点,生态位宽度依然很大(0.948,0.901);垂穗披碱草尽管由于适口性和耐践踏性相对较差,但由于其株高优势,生态位宽度依然较大(0.815);青海野青茅和紫羊茅在枯草期由于适口性较好而耐践踏性相对较差,对放牧及由放牧引起的环境变化反应最为敏感,其生态位宽度很窄(0.302,0.416),说明放牧抑制了高大禾草层片的发育,为植株矮小的莎草科牧草和阔叶植物的生长创造了条件;3)鹅绒委陵菜和雪白委陵菜、高山紫菀和柔软紫菀之间生态位重叠的降低,是种间对资源利用上分化的结果,且生态位宽度较大的物种与其它种群间也有较大的生态位重叠,分布于放牧演替系列两个极端的种群间生态位重叠较小,说明物种的分布是既间断又连续的.
其他语种文摘 The four different stocking rates* dominances, niche breadths and niche overlaps for twenty-one main plant population in an alpine Kobrecia parva meadow cold-seasonal pasture were measured, and the results showed that: 1) Through grazing for two years, Kobrecia parva and Elymus natans were still major dominated plants in control, light grazing and moderate grazing plots, but Kobrecia parva and Poten-tilia anserine dominated in heavy grazing plot; 2) although yaks in priority ingested dainty Kobrecia parva and Poa alpigena in withered period, their niche breadths were still very wide (0.948,0.901) because they were able to bear of grazing, drought and trampling and other biological characters. Besides, although Elymus natans was not ingested in priority duo to its bad dainty and biological character of enduring trampling, its niche breadth was still relatively wide (0.805) for its height, and niche breadths of D. kokonorica and Festuca rubra based on grazing gradients were all very narrow (0.302,0. 416)for their good dainty and dad enduring trampling. Therefore, all these indicated that grazing restricted growth of high grasses and created a good environment for growth of short sedges; 3) Niche overlaps between Potentilla anserine and P. bifurca, between Asteralpinus and A. flaccidus were relatively narrow (0.592, 0.412), which could be seen as polarized result for resource utilization based plant species. And then it could be also seen that the species with grater niche breadths generally had greater niche overlaps with other species, and that the species distributing in two extremeness along grazing gradients had narrower niche overlaps each other, which indicated the distributing of species was continuous and discontinuous.
来源 中国草地学报 ,2006,28(6):10-17 【核心库】
关键词 高寒小嵩草草甸 ; 冷季草场 ; 放牧率 ; 优势度 ; 生态位宽度 ; 生态位重叠
地址

1. 中国科学院西北高原生物研究所, 青海, 西宁, 810001  

2. 青海省畜牧兽医科学院, 青海, 西宁, 810016

语种 中文
文献类型 研究性论文
ISSN 1673-5021
学科 畜牧、动物医学、狩猎、蚕、蜂
基金 青海省“九五”科技攻关项目 ;  国家“十五”科技攻关重大项目
文献收藏号 CSCD:2609198

参考文献 共 28 共2页

1.  Grinnell J. The niche-relationship of California Thrasher. Auk,1919,34:427-433 被引 4    
2.  Elton C. Animal ecology,1927:63-68 被引 24    
3.  Pielou E C. Niche width and niche overlap:a method for measuring them. Ecology,1972,53:687-692 被引 16    
4.  Leibold M A. The niche concept revisited:mechanistic modelsand community context. Ecology,1995,76(5):1371-1382 被引 97    
5.  Shugart H H. Niche theory and community organization. Can J Bot,1998,66:2634-2639 被引 8    
6.  王刚. 关于生态位定义探讨及生态位重叠计测公式改进研究. 生态学报,1984,4(2):119-127 被引 230    
7.  王刚. 生态位理论若干问题探讨. 兰州大学学报(自然科学版),1990,26(2):109-113 被引 22    
8.  黄英姿. 生态位理论研究中的数学方法. 应用生态学报,1994,5(3):331-337 被引 55    
9.  张光明. 生态位概念演变与展望. 生态学杂志,1997,16(6):46-51 被引 92    
10.  林开敏. 生态位理论及其应用研究进展. 福建林学院学报,2001,21(3):283-287 被引 40    
11.  李洯. 生态位理论及其测度研究进展. 北京林业大学学报,2003,25(1):100-107 被引 5    
12.  朱春全. 生态位态热理论与扩充假说. 生态学报,1997,17(3):324-332 被引 92    
13.  陈波. 三种嵩草群落若干植物种的生态位宽度与重叠分析. 植物生态学报,1995,19(2):158-169 被引 77    
14.  陈波. 高寒草甸植物种群的生态位研究. 高寒草甸生态系统,1995:73-90 被引 5    
15.  丛沛桐. 东北羊草群落种群生态位重叠关系研究. 植物研究,1999,19(2):213-219 被引 17    
16.  王仁忠. 放牧影响下羊草草地主要植物种群生态位宽度与生态位重叠的研究. 植物生态学报,1997,21(4):304-311 被引 109    
17.  韩苑鸿. 以放牧率梯度研究内蒙古典型草原主要植物种群的生态位. 草地学报,1999,7(3):204-210 被引 20    
18.  周华坤. 江河源区“黑土滩”型退化草场的形成过程与综合治理. 生态学杂志,2003,22(5):51-55 被引 94    
19.  王启基. 放牧强度对冬春草场植物群落结构及功能的效应分析. 高寒草甸生态系统,1995:353-363 被引 9    
20.  Cole D N. Experimental tramp ling of vegetationⅡ. J App l Ecol,1995,32:215-224 被引 15    
引证文献 17

1 董全民 高寒混播草地牦牛优化放牧强度的研究 Ⅰ以牦牛增重为目标研究牧草生长季的最佳放牧强度 草业科学,2008,25(7):87-90
被引 1

2 董全民 垂穗披碱草/星星草混播草地优化牦牛放牧强度的研究 草业学报,2008,17(5):16-22
被引 8

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