The ecological role of Fraxinus for species diversity in floodplain forests.

IF 2.3 2区 环境科学与生态学 Q2 ECOLOGY
A Floren, P Horchler, P Sprick, T Müller
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Abstract

Little is known about the importance of different tree species in maintaining diversity and function. To address this, we fogged 99 trees (30 Fraxinus excelsior, 30 F. pennsylvanica, 21 Quercus robur, 12 Ulmus laevis and 6 Tilia cordata) in Elbe floodplain forests, resulting in 182,179 arthropods including 25,861 (14.2%) beetles. Ninety-two percent of all beetles and 65% of all species were canopy associated. Tourist beetles of the ground contributed 35% to the arboreal richness but only 8% to overall abundance, suggesting little influence on trophic interactions. The highest alpha and beta diversity was recorded on Fraxinus trees, mainly due to the high number of tourists in low abundance. On the contrary, Quercus or Ulmus were characterised by large numbers of associated species. The beetle communities, and even more so the entire communities of all orders, were dominated by predators, suggesting strong top-down control of herbivore populations. Phytophages were significantly more abundant on Quercus and Ulmus, while they represented less than 10% on the ashes. F. excelsior is a keystone species, and this includes the ability to maintain biodiversity and communities with different functional profiles. As a result of ash dieback and drought, F. excelsior has been severely reduced in these forests. Our extensive data show that F. excelsior and F. pennsylvanica are similar in many ecological features due to their taxonomic relationship, resulting in a similar diversity and functional composition of arthropod communities, indicating that F. pennsylvanica can at least partially fill the ecological role of the common ash.

黄曲霉在洪泛平原森林物种多样性中的生态作用。
人们对不同树种在维持多样性和功能方面的重要性知之甚少。为了解决这一问题,我们在易北河漫滩森林中对99棵树(30棵黄曲柳、30棵宾西法尼、21棵栎树、12棵榆木和6棵椴)进行了喷雾处理,结果显示节肢动物182179只,其中甲虫25861只(14.2%)。92%的甲虫和65%的物种与冠层有关。地面旅游甲虫对树木丰富度的贡献为35%,但对总体丰富度的贡献仅为8%,表明对营养相互作用的影响很小。α和β多样性最高的是黄曲霉树,这主要是由于游客数量多而丰度低。相反,栎科和榆科的特点是有大量的伴生种。甲虫群落,甚至是所有目的整个群落,都是由捕食者控制的,这表明了对食草动物种群的自上而下的强大控制。植噬体在栎树和榆木上的数量显著增加,而在灰烬上的数量不足10%。excelsior是一个关键物种,这包括维持生物多样性和不同功能群落的能力。由于白蜡树枯死和干旱,在这些森林中,白蜡树的数量严重减少。我们的大量数据表明,由于它们的分类关系,在许多生态特征上excelsior和F. pennsylvania相似,导致节肢动物群落的多样性和功能组成相似,这表明F. pennsylvania至少可以部分地填补普通白蜡树的生态作用。
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来源期刊
Oecologia
Oecologia 环境科学-生态学
CiteScore
5.10
自引率
0.00%
发文量
192
审稿时长
5.3 months
期刊介绍: Oecologia publishes innovative ecological research of international interest. We seek reviews, advances in methodology, and original contributions, emphasizing the following areas: Population ecology, Plant-microbe-animal interactions, Ecosystem ecology, Community ecology, Global change ecology, Conservation ecology, Behavioral ecology and Physiological Ecology. In general, studies that are purely descriptive, mathematical, documentary, and/or natural history will not be considered.
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