GROWTH CHARACTERISTICS OF POTENTILLA ANSERINA DETERMINED BY ANALYZING SMALL-SCALE PATCHY HABITATS

文献类型： 外文期刊

第一作者： Xie, Kaiyun

作者： Xie, Kaiyun;Fenghe;Wan, Liqiang;Li, Xianglin;Zhao, Xiang;Dong, Kuanghu;Xie, Kaiyun;Zhang, Yingjun

作者机构：

关键词： Patchy habitat;Potentilla anserina;Plasticity;Patches;Clonal plants

期刊名称：PAKISTAN JOURNAL OF BOTANY （ 影响因子：0.972； 五年影响因子：0.988 ）

ISSN： 0556-3321

年卷期： 2015 年 47 卷 3 期

页码：

收录情况： SCI

摘要： Patchy distribution of plant populations is a hallmark of saline grassland ecosystem at Weiyuan, YouYu County, Shanxi Province, north China. According to species composition and community dominance, the grassland was divided into 8 patches. First, we investigated and analyzed community characteristics, including a diversity and soil properties (soil moisture, bulk density, pH value, basicity) of the 8 patches of the grassland and found that the 8 patches were obviously divided into 2 categories. Patches I, II, and III formed group 1, and the other patches were included in group 2. The soil moisture, bulk density, pH value, and basicity in group 1 were lower than those in group 2 (p<0.05). Next, we selected Potentilla anserina as a representative species and measured its growth characteristics in each patch and found its root length (df =46, vertical bar t vertical bar =5.84, p<0.0001), spacer length (df =118, vertical bar t=3.61, p=0.0005), and stolon length (df =118, vertical bar t vertical bar =2.53, p=0.0127) were significantly greater in group 1 than in group 2. We concluded that under relatively good habitat conditions, Potentilla anserina adopted breadth foraging strategy, increased its stolons number, which reduced the risk of death and promoted valid survival by spreading in the available space. On the contrary, under relatively poor habitat conditions and in a highly competitive environment, Potentilla anserina adopted the strength foraging strategy to acquire resource from farther places by increasing its spacer and stolon lengths or rapidly explore new habitats to avoid unfavorable environments.

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