Nutrients and drought alter tri-trophic interactions in cool-temperate forests Los nutrientes y la sequía alteran las interacciones tritróficas en los bosques templados fríos

IF 2 3区 农林科学 Q2 ENTOMOLOGY
Jaquelina Marisa Chaij, Melina Jeanette Aranda, Enrique José Chaneton, Noemi Mazía
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引用次数: 0

Abstract

Abstract Image

养分和干旱改变了寒温带森林中的三营养交互作用
食草昆虫是森林生态系统中的主要消费者,营养相互作用的复杂性随资源可用性、取食行会的异质性和天敌的存在而变化。在这项研究中,我们考察了南美洲南部 Nothofagus pumilio(椑科:Nothofagaceae)Poepp.Krasser 森林中的三营养体相互作用。具体来说,我们重点研究了在整个生长季(中期和后期),氮添加和干旱事件对不同取食行会的昆虫草食水平以及潜叶蝇寄生率的影响。氮(N)添加量增加了叶片氮含量,但对树栖昆虫的总危害量没有影响。然而,不同的取食类群对氮添加的反应不同,而且这些反应在不同的平均年或干旱年以及生长季中也各不相同。特别是,潜叶蝇的活动对氮素添加有积极影响,在平均年的晚季,潜叶蝇的发生率会增加。氮添加对矿化虫活动的积极影响并没有逐级上升到寄生虫的营养级,寄生虫的营养级随气候环境和生长季节而变化。这些结果表明,三营养级的相互作用主要受气候环境的控制,因为消费者及其天敌的反应更依赖于气候环境和生长季节,而不是植物质量。总之,我们强调了非生物资源的波动和各营养级内部的异质性在森林生态系统三营养级相互作用结构中的作用。
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来源期刊
Ecological Entomology
Ecological Entomology 生物-昆虫学
CiteScore
4.90
自引率
4.50%
发文量
94
审稿时长
3 months
期刊介绍: Ecological Entomology publishes top-quality original research on the ecology of insects and related invertebrate taxa. Our aim is to publish papers that will be of considerable interest to the wide community of ecologists who are motivated by ecological or evolutionary theory. The suitability of a manuscript will usually be assessed within 5 days. We publish full-length Original Articles as well as Reviews, Short Communications, Methods and Natural History papers. In Original Articles, we greatly prefer papers that test specific hypotheses and which have a high degree of novelty. All categories aim for innovative contributions that advance the subject of ecological entomology.
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