Relationship Between Plant Functional Groups,Species Richness and Community’s Productivity in Degraded Grassland

doi:10.11733/j.issn.1007-0435.2011.06.005

›› 2011, Vol. 19 ›› Issue (6): 917-921,999.DOI: 10.11733/j.issn.1007-0435.2011.06.005

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Relationship Between Plant Functional Groups,Species Richness and Community’s Productivity in Degraded Grassland

LI Li^1,2, LIU Wei¹

1. Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining, Qinghai Province 810008, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received:2011-05-03 Revised:2011-06-17 Online:2011-12-15 Published:2012-07-09

退化草地植物功能群和物种丰富度与群落生产力关系的研究

李里^1,2, 刘伟¹

1. 中科院西北高原生物研究所高原生物适应与进化重点实验室, 青海西宁810008;
2. 中国科学院研究生院, 北京100049

通讯作者: 刘伟,E-mail:liuwei@nwipb.ac.cn
作者简介:李里(1987),女,安徽宿州人,硕士研究生,研究方向为草地生态,E-mail:lili@nwipb.cas.cn
基金资助:
国家自然科学基金资助项目(30970498)资助

Abstract

Abstract: In order to investigate how functional groups change after degradation,the relationships between species richness and community’s productivity were analyzed using community survey and spatial-temporal substitution methods in different degraded Kobresia humilis meadow of Dari County in Qinghai province.Results showed that moderately degraded meadow had the highest species richness and diversity index;the slight degraded meadow followed and the heavily degraded meadow had the lowest.The community’s productivity was the greatest in slightly degraded meadow and is inconsistent with the tendency of species richness and diversity index having no significant correlation between them.Additionally,different plant functional groups showed a different variation.Along with grassland degradation increase,the biomass of forbs increased,while the biomass of leguminosae and the sedge decreased,and the biomass of gramineae showed a low-high-low tendency.Correlation analysis showed that the biomass of plant functional groups had no significant correlation with the species number of plant functional groups.

Key words: Degraded grassland, Plant functional groups, Species richness, Grassland productivity

摘要： 为了探讨草地退化后功能群的变化情况,采用群落调查和空间代替时间的方法,在青海省达日地区对不同退化程度的矮嵩草(Kobresia humilis)草甸物种丰富度和生产力之间的关系进行了分析。结果表明:物种丰富度和物种多样性指数在中度退化草地最高,轻度退化草地次之,重度退化草地最低;群落生产力则在轻度退化草地最高,中度退化草地次之,重度退化草地最低,且与物种总数和多样性指数无显著相关性。不同植物功能群的变化不尽相同,随着退化程度的加剧杂类草生物量增加、豆科和莎草科生物量减少、禾本科生物量呈现"低-高-低"的变化趋势。相关分析结果表明,功能群生物量与功能群内植物种数不存在明显的相关关系。

关键词: 退化草地, 植物功能群, 物种丰富度, 草地生产力

CLC Number:

Q145.2

LI Li, LIU Wei. Relationship Between Plant Functional Groups,Species Richness and Community’s Productivity in Degraded Grassland[J]. , 2011, 19(6): 917-921,999.

李里, 刘伟. 退化草地植物功能群和物种丰富度与群落生产力关系的研究[J]. , 2011, 19(6): 917-921,999.

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Relationship Between Plant Functional Groups,Species Richness and Community’s Productivity in Degraded Grassland

退化草地植物功能群和物种丰富度与群落生产力关系的研究

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