Shrub effects on germinable soil seed bank in overgrazed rangelands

IF 1.7 4区生物学 Q2 PLANT SCIENCES Plant Ecology & Diversity 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

Plant Ecology & Diversity PLANT SCIENCES-

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Plant Ecology and Diversity is an international journal for communicating results and novel ideas in plant science, in print and on-line, six times a year. All areas of plant biology relating to ecology, evolution and diversity are of interest, including those which explicitly deal with today''s highly topical themes, such as biodiversity, conservation and global change. We consider submissions that address fundamental questions which are pertinent to contemporary plant science. Articles concerning extreme environments world-wide are particularly welcome. Plant Ecology and Diversity considers for publication original research articles, short communications, reviews, and scientific correspondence that explore thought-provoking ideas. To aid redressing ‘publication bias’ the journal is unique in reporting, in the form of short communications, ‘negative results’ and ‘repeat experiments’ that test ecological theories experimentally, in theoretically flawless and methodologically sound papers. Research reviews and method papers, are also encouraged. Plant Ecology & Diversity publishes high-quality and topical research that demonstrates solid scholarship. As such, the journal does not publish purely descriptive papers. Submissions are required to focus on research topics that are broad in their scope and thus provide new insights and contribute to theory. The original research should address clear hypotheses that test theory or questions and offer new insights on topics of interest to an international readership.