| 东灵山亚高山草甸退化等级与植物特征 |
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| 引用本文： | 赵陟峰,蔡飞,李俊清,周杰.东灵山亚高山草甸退化等级与植物特征[J].水土保持通报,2015,35(4):324-328. |
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| 作者姓名： | 赵陟峰 蔡飞 李俊清 周杰 |
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| 作者单位： | 北京林大林业科技股份有限公司博士后工作分站, 北京 100083;北京林业大学, 北京 100083;北京林大林业科技股份有限公司博士后工作分站, 北京 100083;北京林业大学, 北京 100083;北京林大林业科技股份有限公司博士后工作分站, 北京 100083 |
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| 基金项目： | 中国博士后科学基金项目"东灵山退化亚高山草甸植被恢复关键技术研究"(2014M550625); 北京市科技计划项目(Z141100006014039) |
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| 摘 要： | 目的]探索东灵山亚高山草甸的退化等级与植被特征,为该区生态系统的保护和可持续利用提供理论依据和技术支持。方法]采用样方调查法研究东灵山亚高山草甸的植被特征。根据退化程度分级,并通过从优势种变化、物种多样性和地上生物量等参数,比较分析不同退化程度亚高山草甸的退化特征。结果]人类活动是草甸退化的主要影响因子,退化最严重的区域位于海拔2 100~2 200m的位置;按照人为干扰程度和草甸植被覆盖度,将退化亚高山草甸划分为重度退化、中度退化、轻度退化和无明显退化4个等级。结论]随着退化程度加重物种数呈减少趋势,Shannon—Weiner指数、Pielou指数和Simpson's指数均逐渐降低,地上生物量也相应减少。其中无明显退化草甸的物种数为28,优势种主要有卵穗苔草、地榆、珠芽蓼、矮紫苞鸢尾、紫苞风毛菊等,地上生物量是516.4g/m2;而重度退化草甸的物种数仅14种,地上生物量为58.3g/m2,平车前和蒲公英变为优势种。
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| 关 键 词： | 亚高山草甸 植被特征 生物量 退化 物种多样性 |
| 收稿时间： | 2014/6/20 0:00:00 |
| 修稿时间： | 2014/6/25 0:00:00 |
Degradation Degree and Vegetation Characteristics of Subalpine Meadows in Dongling Mountain |
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| ZHAO Zhifeng,CAI Fei,LI Junqing and ZHOU Jie.Degradation Degree and Vegetation Characteristics of Subalpine Meadows in Dongling Mountain[J].Bulletin of Soil and Water Conservation,2015,35(4):324-328. |
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| Authors: | ZHAO Zhifeng CAI Fei LI Junqing and ZHOU Jie |
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| Institution: | Postdoctoral Work Stations of Beijing Forestry University Forestry Science Company Ltd., Beijing 100083, China;Beijing Forestry University, Beijing 100083, China;Postdoctoral Work Stations of Beijing Forestry University Forestry Science Company Ltd., Beijing 100083, China;Beijing Forestry University, Beijing 100083, China;Postdoctoral Work Stations of Beijing Forestry University Forestry Science Company Ltd., Beijing 100083, China |
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| Abstract: | Objective] The research explored the degradation degree and vegetation characteristics of subalpine meadow in Dongling mountain in order to provide scientific basis and technological guide for ecosystem protection and sustainable use of resources. Methods] Quadrat survey method was used. Based on the degree of vegetation degradation, the vegetation characteristics of subalpine meadow with different degradation degree were compared and analyzed according to the surveyed variables including the variation of dominant species, species diversity and the aboveground biomass, etc. Results] Human activity was the main influence factor of the meadow degradation, and the most serious degraded area was at altitude of 2 100~2 200 m. According to the degree of human interference and vegetation coverage, subalpine meadow could be divided into four levels: severe degradation, moderate degradation, mild degradation and non-obvious degradation. Conclusion] With the aggravation of degradation, species showed a decrease trend, so did the Shannon-Weiner index, Pielou index and Simpson's index, and the above ground biomass also reduced accordingly. In non-obvious degradation subalpine meadow, the number of species was 28, the dominant species were mainly Carex duriuscula, Sanguisorba officinalis, Polygonum viviparum, Iris tectorum, Saussurea iodostegia etc., the aboveground biomass was 516.4 g/m2; while in severely degraded meadow, the number of species reduced to 14, the aboveground biomass was 58.3 g/m2, the dominant species were Plantago depressa and Taraxacum mongolicum. |
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| Keywords: | subalpine meadows vegetation characteristics biomass degradation species diversity |
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