Negative effects of nitrogen fertilization on herbivore fitness are exaggerated at warmer temperatures and in high-altitude populations.

IF 2.3 2区 环境科学与生态学 Q2 ECOLOGY
Ange Raharivololoniaina, Roland Busch, Franziska Deppe, Anna Hitzler, Eva Plath, Tamara Rischen, Mine Yilmazer, Klaus Fischer
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引用次数: 0

Abstract

Biodiversity is currently under strong pressure due to anthropogenic global change. Different drivers of global change may exert direct and indirect effects on biodiversity, and may furthermore interact with one another, but our respective knowledge is still very limited. We investigated indirect and interactive effects of two important drivers of global change, eutrophication and climate change, in replicated low- and high-altitude populations of an insect herbivore, the butterfly Lycaena tityrus, in a laboratory setting. We found local adaptation in developmental traits, with low-altitude populations being adapted to warmer temperatures and longer seasons. Lycaena tityrus responded negatively to agriculturally relevant levels of fertilization of its host plant, showing reduced body mass and prolonged development time. Negative effects were particularly pronounced at warmer temperatures and in high-altitude populations. Our study adds to the increasing knowledge that different drivers of global change may interact and thereby increase the overall level of threat to biodiversity. We suggest that populations inhabiting naturally nutrient-poor environments might be even more vulnerable to agricultural intensification than others, potentially applicable to many species. These findings may have important implications for protecting numerous vulnerable species in the face of rapid environmental change.

氮肥对草食动物适应性的负面影响在较高温度和高海拔种群中被夸大。
由于人为的全球变化,生物多样性正面临着巨大的压力。全球变化的不同驱动因素可能对生物多样性产生直接和间接的影响,并可能进一步相互作用,但我们各自的知识仍然非常有限。在实验室环境中,我们研究了全球变化的两个重要驱动因素——富营养化和气候变化的间接和相互作用,研究了一种食草昆虫Lycaena tityrus蝴蝶在低海拔和高海拔的复制种群。我们发现,在发育特征上,低海拔地区的人口适应了更温暖的温度和更长的季节。Lycaena tityrus对其寄主植物的农业相关施肥水平负响应,表现出体重减少和发育时间延长。在气温较高和海拔较高的人群中,负面影响尤为明显。我们的研究增加了越来越多的知识,即全球变化的不同驱动因素可能相互作用,从而增加了对生物多样性的总体威胁。我们认为,生活在自然营养贫乏环境中的种群可能比其他种群更容易受到农业集约化的影响,这可能适用于许多物种。这些发现可能对保护面临快速环境变化的众多脆弱物种具有重要意义。
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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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