Canopy facilitation outweighs elemental allelopathy in a metalliferous system during an exceptionally dry year

IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY
Hugo Randé, Richard Michalet, David Nemer, Florian Delerue
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Abstract

Abstract Image

在一个异常干旱的年份里,在一个冶金系统中,树冠的促进作用超过了元素的等位作用
元素等效假说认为,高积累物种富含金属的枯落物可能会对邻近植物产生不利影响,从而使高积累植物获得竞争优势。在此,我们旨在明确该假说在现实田间条件下的应用条件,以及与金属化系统中发现的其他积极效应相比,该假说的相对重要性。我们研究了两种金属叶植物(Arenaria multicaulis 和 Hutchinsia alpina)的叶片锌和镉积累水平不同,它们对两种具有不同金属耐受性的霞糠穗草生态型的枯落物诱导的元素等位效应和冠层效应。该实验在比利牛斯山(法国)的一个旧矿山山谷中污染程度截然不同的两个生境中进行。在污染程度较低的生境中,金属积累较多的金属叶植物物种(Hutchinsia alpina)对金属耐受性较低的目标表现出强烈的元素等位效应,而金属积累较少的金属叶植物物种(Arenaria multicaulis)则没有垃圾效应。两种金属叶植物都有积极的冠层效应,这可能是由于微气候条件的改善。实验期间发生的干旱可能影响了这些冠层效应,增加了它们在研究过程中的重要性。对于 Hutchinsia alpina 而言,积极的冠层效应强于消极的枯落物效应,因此对两种目标生态型都产生了总体的积极效应。综述。我们的研究结果让人们更好地了解了金属植物群落中元素等位植病的发生,以及在全球变暖背景下与微气候促进作用相比,元素等位植病的相对重要性。
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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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