Shrub effects on germinable soil seed bank in overgrazed rangelands

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-02-17 DOI:10.1080/17550874.2020.1718233

R. Erfanzadeh, Ali A. Shayesteh Palaye, H. Ghelichnia

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引用次数: 13

Abstract

ABSTRACT Background Little information is available about the effects of different species of shrubs on the composition of the soil seed bank (SSB) and how the SSB could contribute to restoration of degraded grasslands. Aims We determined the role of three dominant shrubs on SSB characteristics and evaluated their potential for their possible use in rangeland restoration projects. Methods Ten sites, each containing three shrub species (Onobrychis cornuta, Berberis integerrima and Juniperus sabina) and a herbaceous patch (control) in close proximity, were sampled and their SSB density, richness and diversity were determined. Results Density of the SSB at 0–5 cm depth was lowest under J. sabina and highest under herbaceous vegetation, but did not differ between B. integerrima and O. cornuta. SSB density at 5–10 cm depth was significantly greater under B. integerrima than under the other shrubs or herbaceous patch. Species richness of the SSB was significantly greater under B. integerrima at 5–10 cm depth than under the other shrubs. Conclusion This study revealed that the extent to which vegetation affected SSB characteristics did not only depend on the presence of shrubs, but also on the species of shrub. We recommend B. integerrima as a priority species in restoration projects due to its significant positive influences on SSB.

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灌木对过度放牧草地土壤种子库的影响

摘要背景关于不同种类灌木对土壤种子库（SSB）组成的影响以及SSB如何有助于退化草原的恢复，目前知之甚少。我们确定了三种优势灌木对SSB特征的作用，并评估了它们在牧场恢复项目中的潜在用途。方法对10个地点进行采样，每个地点包含3种灌木（小檗、小檗和杜松）和一个近距离的草本斑块（对照），并测定其SSB密度、丰富度和多样性。结果0～5cm深度的SSB密度在沙柏下最低，在草本植被下最高，但在B.integerrima和O.cornuta之间并没有差异。5–10 cm深度的SSB密度在B.integerrima下显著大于在其他灌木或草本斑块下。在5–10厘米深的B.intelgerrima下，SSB的物种丰富度显著高于其他灌木下。结论植被对SSB特征的影响程度不仅取决于灌木的存在，还取决于灌木种类。我们建议将B.integerrima作为恢复项目的优先物种，因为它对SSB有显著的积极影响。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.