放牧对青藏高原东缘高寒草甸群落27种植物地上生物量分配的影响

被引：49

作者：

赵彬彬

牛克昌

杜国祯

机构：

[1] 兰州大学干旱与草地生态教育部重点实验室

来源：

生态学报 | 2009年 / 29卷 / 03期

关键词：

放牧; 高寒草甸; 植物群落; 生物量分配; 繁殖分配;

D O I：

暂无

中图分类号：

Q948 [植物生态学和植物地理学];

学科分类号：

071012 ; 0713 ;

摘要：

通过对比研究青藏高原高寒草甸27种植物群落组分种在放牧和长期排除放牧生境中的生物量分配差异,试图揭示长期放牧干扰对植物生活史对策的影响。结果表明:(1)放牧对群落物种个体生物量大小和生物量分配有着显著的影响;(2)总体来看:多数物种(24)放牧生境中的平均个体生物量明显小于禁牧地中的平均个体生物量;而多数物种在放牧后(23种)繁殖分配明显增加;茎分配有增有减(15减小12种增加);叶分配呈减小趋势(20种减小7增加)。(3)放牧的影响在不同物种间和功能群间都存在着明显的差异。放牧使毒草茎分配减小叶分配增加,繁殖分配几乎不受影响;豆科和杂草繁殖分配增加,茎分配和叶分配减小,其中豆科两个种的生物量分配变化都不显著;禾草叶分配减小,繁殖分配和茎分配增加;(4)在群落水平上,放牧使繁殖分配和叶分配增加,茎分配减少。

引用

页码：1596 / 1606

页数：11

共 20 条

[11]

Vulnerability of land systems to fire: Interactions among humans, climate, the atmosphere, and ecosystems[J] . Sandra Lavorel,Mike D. Flannigan,Eric F. Lambin,Mary C. Scholes.Mitigation and Adaptation Strategies for Global Change . 2007 (1)

[12]

Plant functional traits, herbivore selectivity and response to sheep grazing in Patagonian steppe grasslands[J] . ANA M.CINGOLANI,GABRIELAPOSSE,MARTA B.COLLANTES.Journal of Applied Ecology . 2005 (1)

[13]

EFFECTS OF BIODIVERSITY ON ECOSYSTEM FUNCTIONING: A CONSENSUS OF CURRENT KNOWLEDGE[J] . D. U. Hooper,F. S. Chapin III,J. J. Ewel,A. Hector,P. Inchausti,S. Lavorel,J. H. Lawton,D. M. Lodge,M. Loreau,S. Naeem,B. Schmid,H. Set?l?,A. J. Symstad,J. Vandermeer,D. A. Wardle.Ecological Monographs . 2005 (1)

[14] The long-term relationship between plant diversity and total plant biomass depends on the mechanism maintaining diversity [J].

Fox, JW .

OIKOS, 2003, 102 (03) :630-640

[15]

Effects of grazing intensity on growth, reproduction, and abundance of three palatable forbs in Kansas tallgrass prairie[J] . Karen R. Hickman,David C. Hartnett.Plant Ecology . 2002 (1)

[16] Can grazing response of herbaceous plants be predicted from simple vegetative traits? [J].

Díaz, S ;

Noy-Meir, I ;

Cabido, M .

JOURNAL OF APPLIED ECOLOGY, 2001, 38 (03) :497-508

[17] Effects of grazing on plant species composition and spatial distribution in rangelands of the Sahel [J].

Hiernaux, P .

PLANT ECOLOGY, 1998, 138 (02) :191-202

[18]

Importance of assemblage-level thinning:A field experiment in an alpine meadow on Tibet Plateau. Luo Y J,Qin G L,Du G Z. Journal of Vegetation Science . 2006

[19]

Reproductive Allocationin Plants. Reekie E G,Bazzaz F A. . 2005

[20]

Research on the restoring succession of the degenerated grassland in Inner MongoliaⅡ Analysis of the restoring processes. Wang W,Liu Z L,Hao D Y,et al. Acta Phytoecologica Sinica . 1996

← 1 2 →