| 蜥蜴对内蒙古典型草原群落多样性和地上生物量的影响 |
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| 引用本文： | 杨涵越,聂梅,黄永梅,张景慧.蜥蜴对内蒙古典型草原群落多样性和地上生物量的影响[J].草地学报,2015,23(2):246-251. |
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| 作者姓名： | 杨涵越 聂梅 黄永梅 张景慧 |
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| 作者单位： | 北京师范大学资源学院 地表过程与资源生态国家重点实验室, 北京 100875 |
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| 基金项目： | 国家自然科学资金项目，“北京市大学生创新创业行动计划”项目 |
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| 摘 要： | 为研究蜥蜴(Phrynocephalus frontalis)活动对内蒙古典型草原群落多样性、地上生物量、群落结构、生活型组成以及优势种生物量的影响,于2012年6月和8月在内蒙古毛登牧场围封草场内布设有蜥蜴样地和对照样地,进行样方调查和生物量取样.结果表明:与对照样地相比,蜥蜴样地6月的Shannon-Wiener指数和均匀度显著降低,8月Shannon-Wiener指数、均匀度和物种丰富度均显著低于对照样地;蜥蜴样地的群落生物量在6月和8月分别比对照样地高68.85和111 g·m-2;在功能群水平,蜥蜴样地一年生植物和多年生禾草的生物量比例比对照样地增加了19.1%和11.0%,而多年生杂类草生物量比例降低了19.8%;在物种水平,蜥蜴样地羊草(Leymus chinensis)生物量的比例在生长季节初期达到了75.0%.可见在内蒙古典型草原,蜥蜴干扰可使一年生植物和多年生禾草的生物量比例增加,而使多年生杂类草的物种数和生物量比例显著降低;蜥蜴干扰显著促进了羊草的生长;同时会降低群落的物种多样性,提高地上生物量.
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| 关 键 词： | 蜥蜴干扰 物种多样性 物种组成 植物功能群 地上生物量 |
| 收稿时间： | 2014-05-08 |
The Impacts of Lizards on the Community Diversity and Aboveground Biomass of Inner Mongolia Steppe |
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| YANG Han-yue,NIE Mei,HUANG Yong-mei,ZHANG Jing-hui.The Impacts of Lizards on the Community Diversity and Aboveground Biomass of Inner Mongolia Steppe[J].Acta Agrestia Sinica,2015,23(2):246-251. |
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| Authors: | YANG Han-yue NIE Mei HUANG Yong-mei ZHANG Jing-hui |
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| Institution: | College of Resources Science and Technology, Beijing Normal University, State Key Laboratory of Surface Processes and Resource Ecology, Beijing 100875, China |
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| Abstract: | The effects of lizard activities on the biodiversity, community biomass, community structure, life form composition and biomass of dominant species were studied by community surveys in the Maodeng pasture near Xilin Hot City (Inner Mongolia, China) in June and August 2012. Difference between two sites, one with lizards (Lizard site) and the other without lizards (Control site) was analyzed. The Shannon-Wiener index and evenness at Lizard site was significant lower than that at Control site in June, while all diversity indexes including Shannon-Wiener index, evenness and richness were significantly low at Lizard site in August compared with Control site. The results also showed that the biomass at Lizard site in June and August was 68.85 g·m-2 and 111 g·m-2 higher than that at Control site, respectively. At the plant functional type level, the biomass proportions of annual and perennial grasses at Lizard Site increased 19.1% and 11.0% than the Control site respectively, whereas the biomass proportion of perennial forbs declined by 19.8%. At the species level, the biomass of Leymus chinensis reached 75.0% of the community biomass in the early growing season at Lizard site. These results suggested that in the typical steppe of Inner Mongolia, lizard activity could increase the percent biomass of annuals and perennial grasses, especially the biomass of L.chinensis, while decreased the quantity of perennial forbs. And to some extent, the lizard activity could reduce the species diversity and promote the aboveground biomass in the typical steppe. |
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| Keywords: | Lizard interference Community biodiversity Species composition Plant functional types Aboveground biomass |
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