Climate, Host Abundance and Spread: Unravelling the Drivers of Forest Pest Distributions in North America

IF 3.4 2区 环境科学与生态学 Q2 ECOLOGY
Andrew V. Gougherty, Ashley D. Walters, Anantha Prasad, Matthew P. Peters, Stephen N. Matthews, Ian DeMerchant
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Abstract

AimForest pathogens, insect pests and parasitic plants are among the most important disturbance agents in forested ecosystems. Understanding where pests occur and where they might occur in the future will be important for understanding their impacts on host trees, and planning for future pest outbreaks.LocationNorth America.TaxonInsect pests, pathogens and parasitic plants of forest trees.MethodsHere, we develop and implement a framework to predict the contemporary distributions of 26 pest species that accounts for climate, host abundance and, for non‐native species, their spread on the landscape.ResultsWe show that pest distributions can be predicted primarily by climatic variables. The abundance of individual host trees had only minor explanatory power, but the summed total of host abundance frequently had greater importance—suggesting forest composition and the relative frequency of hosts and non‐hosts place strong limits on pest distributions. Non‐native pests were strongly impacted by the distance from their original discovery location in North America, which tended to interact with climate variables—suggesting most non‐native pests are not yet at equilibrium with their potential climatic ranges in North America.Main ConclusionsThis work helps to clarify the generalised controls on pest distributions and provide a framework for predicting pest distributions in future climates.
气候、寄主丰度和传播:揭示北美森林害虫分布的驱动因素
目的森林病原体、害虫和寄生植物是森林生态系统中最重要的干扰因素之一。了解害虫发生的地点以及未来可能发生的地点,对于了解害虫对寄主树木的影响以及规划未来害虫爆发非常重要。结果我们发现,害虫的分布主要可以通过气候变量来预测。单个寄主树木的丰度只有很小的解释力,但寄主丰度的总和往往具有更大的重要性--这表明森林组成以及寄主和非寄主的相对频率对害虫的分布有很大的限制。非本地害虫受到距离其在北美最初发现地的距离的强烈影响,而这一距离往往与气候变量相互作用--这表明大多数非本地害虫尚未与它们在北美的潜在气候范围达到平衡。
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来源期刊
Journal of Biogeography
Journal of Biogeography 环境科学-生态学
CiteScore
7.70
自引率
5.10%
发文量
203
审稿时长
2.2 months
期刊介绍: Papers dealing with all aspects of spatial, ecological and historical biogeography are considered for publication in Journal of Biogeography. The mission of the journal is to contribute to the growth and societal relevance of the discipline of biogeography through its role in the dissemination of biogeographical research.
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