多重分类法评价植物对围栏禁牧的响应——以亚高山草甸为例

IF 0.4 4区 环境科学与生态学 Q4 ECOLOGY
Wenjin Li, Shuangshuang Liu, Jinhua Li, Ru Lan Zhang, Ka Zhuo Cai Rang, Hua-kun Zhou, B. Yao, Jun Feng Wang
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引用次数: 2

摘要

使用多重分类方法来检测植物性状对放牧和围栏的反应(因为没有放牧的机会)是罕见的。在这里,我们使用多重分类方法来研究青藏高原东部三年来植物多样性、生产力和物种特征对放牧和围栏的反应。结果表明,大多数常见物种对围栏的反应都不明显。与长期自由放牧的草地相比,围栏草地的总物种丰富度显著较高,但无论放牧还是围栏,物种丰富度都随着采样年份的增加而逐渐下降。相关分析表明,物种丰富度与年平均温度呈显著负相关,表明非生物因素(如年温度)也可能在驱动亚高山草甸物种丰富度方面发挥重要作用。地上总生物量与年平均气温和降雨量无关。围栏草甸的群落地上生物量高于放牧草甸,尤其是豆类和禾本科植物的丰度增加,而莎草的比例降低,这表明放牧干扰有利于莎草(如矮嵩草)在亚高山草甸繁殖成功率的提高。应建议将基于生长形态的分析与冠层高度类别相结合,以揭示与放牧有关的一般规则和机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Plant Traits Response to Grazing Exclusion by Fencing Assessed via Multiple Classification Approach: A Case from a Subalpine Meadow
Using multiple classification approach to examine plant traits response to grazing and fencing (as without access to grazing) is rare. Here we used multiple classification approach to examine plant diversity, productivity and species traits response to grazing and fencing over a three-year period on the eastern part of the Qing-Hai Tibetan Plateau. The results showed that most common species response to the fence was poorly noticeable. The fencing meadows compared to those under long-term free grazing are characterized by significantly higher total species richness, but species richness declined with sampling years gradually, regardless of grazing or fencing. The correlation showed that species richness was negatively associated with mean annual temperature significantly, suggesting that abiotic factors (e.g. annual temperature) could also play important roles in driving species richness in this subalpine meadow. Total aboveground biomass was not associated with mean annual temperature and rainfall. The fencing meadow demonstrated higher community aboveground biomass relative to the grazing ones, especially the abundance of legume and graminoids increased, while the proportions of sedge decreased, suggested that grazing disturbance favours the increase of reproductive success of sedge (e.g. Kobresia humilis) in this subalpine meadow. Growth form-based analyses combined with canopy height categories should be recommended to reveal general rules and mechanisms relating to grazing.
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来源期刊
Polish Journal of Ecology
Polish Journal of Ecology 环境科学-生态学
CiteScore
1.10
自引率
0.00%
发文量
9
审稿时长
18-36 weeks
期刊介绍: POLISH JOURNAL OF ECOLOGY (formerly Ekologia polska) publishes original scientific research papers dealing with all aspects of ecology: both fundamental and applied, physiological ecology, evolutionary ecology, ecology of population, community, ecosystem, landscape as well as global ecology. There is no bias regarding taxons, ecosystems or geographical regions.
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