Fertiliser application modulates the impact of interannual climate fluctuations and plant-to-plant interactions on the dynamics of annual species in a Mediterranean grassland

IF 1.7 4区生物学 Q2 PLANT SCIENCES

Plant Ecology & Diversity Pub Date : 2022-06-13 DOI:10.1080/17550874.2022.2130718

M. Valerio, A. Gazol, Maria Ripolles, R. Ibáñez

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引用次数: 0

Abstract

ABSTRACT Background Climate and land-use changes, which include the application of various types of organic and inorganic fertilisers, have been reducing the species diversity of Mediterranean grasslands and threatening its conservation. Annual plants are one of the most diverse functional groups of species in these grasslands, despite suffering competitive pressure from perennial herbaceous and woody species, and they are essential for ecosystem functioning and stability. Aims To quantify how fertilisation modulates the impact of plant-to-plant interactions and climate fluctuations on the dynamics of annuals in Mediterranean grasslands. We hypothesised that the application of sewage sludge would increase competition between functional groups, reducing the abundance of annuals in the long-term, but would buffer the negative impacts of drought on the year-to-year fluctuation of the diversity of annuals. Methods In a semi-natural species-rich Mediterranean grassland in northern Spain, we analysed the changes in the taxonomical and functional composition and diversity of annuals over 14 years in response to variations in the abundance of perennial herbaceous and woody species, climate fluctuations and fertilisation with sewage sludge. We quantified separately the patterns of year-to-year fluctuations and long-term trends. Results The frequency and diversity of annuals decreased with higher abundance of perennial herbaceous species, drought in June and cold winters. The addition of sewage sludge decreased the abundance of annuals in the long-term, seemed to promote competition between annuals and other functional groups at an interannual scale, and mitigated the negative effects of drought and cold. Conclusions Fertilisation influences differently the temporal response of annuals to climate fluctuations and plant-to-plant interactions.

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施肥调节了地中海草原年际气候波动和植物间相互作用对一年生物种动态的影响

摘要背景气候和土地利用的变化，包括各种有机和无机肥料的施用，一直在减少地中海草原的物种多样性，并威胁到其保护。一年生植物是这些草原上最具多样性的物种功能群之一，尽管受到多年生草本和木本物种的竞争压力，但它们对生态系统的功能和稳定性至关重要。目的量化施肥如何调节植物间相互作用和气候波动对地中海草原一年生植物动态的影响。我们假设，污泥的施用会增加功能群之间的竞争，从长远来看会降低一年生植物的丰度，但会缓冲干旱对一年生植物多样性逐年波动的负面影响。方法在西班牙北部一个半天然物种丰富的地中海草原上，分析了14年来一年生植物的分类、功能组成和多样性的变化多年来对多年生草本和木本物种丰度变化、气候波动和污水污泥施肥的反应。我们分别量化了逐年波动和长期趋势的模式。结果一年生植物的频率和多样性随多年生草本植物丰度的增加、六月干旱和冬季寒冷而降低。污泥的添加从长远来看降低了一年生植物的丰度，似乎促进了一年生植物与其他功能群在年际尺度上的竞争，并减轻了干旱和寒冷的负面影响。结论施肥对一年生植物对气候波动和植物间相互作用的时间响应有不同的影响。

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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.