Trophic generalism in the winter moth: a model species for phenological mismatch.

IF 2.3 2区 环境科学与生态学 Q2 ECOLOGY
Oecologia Pub Date : 2024-12-01 Epub Date: 2024-11-20 DOI:10.1007/s00442-024-05629-5
Jamie C Weir
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引用次数: 0

Abstract

Climate change has the potential to disrupt phenological synchrony among interacting species that vary in their phenological sensitivity to temperature. The phenological synchrony observed between winter moth Operophtera brumata caterpillars and oak leafing in spring has become an emblematic test case of this phenomenon, with caterpillars seemingly advancing their phenology more than their host-plant. However, work on this trophic interaction-and on phenological mismatch more widely-routinely overlooks the potential for trophic generalism to buffer the negative effects of mismatch. In the largest study of its kind-using over 3500 individuals reared from egg to pupa-I tested the performance of winter moth caterpillars from four UK populations across nine host-plant species, and considered how adaptation to locally abundant host-plants may modulate performance in different populations. I found that caterpillars survive and grow well across a range of host-plant species, with some evidence of a host-plant by population interaction in performance. Contrary to widespread assumptions, oak seems a relatively poor host-plant species. Occupying a broad trophic niche may help consumers like the winter moth exploit a narrow phenological niche, whereby phenological variation among host-plant species buffers them against asynchrony with any one particular host-plant species. Determining the significance of trophic generalism in the ecology of consumers is a crucial first step towards assessing its role as a potential buffering mechanism and, hence, evaluating the true threat posed by mismatch.

冬蛾的营养通性:物候错配的模式物种。
气候变化有可能破坏相互影响的物种之间的物候同步性,这些物种对温度的物候敏感性各不相同。在冬蛾 Operophtera brumata 毛虫与春季橡树落叶之间观察到的物候同步性已成为这一现象的典型试验案例,毛虫似乎比寄主植物更能推进其物候。然而,关于这种营养交互作用以及更广泛的物候错配的研究通常都忽略了营养通性缓冲错配负面影响的潜力。在这项规模最大的研究中,我使用了 3500 多只从卵到蛹都被饲养的个体,测试了来自英国四个种群的冬蛾毛虫在九种寄主植物上的表现,并考虑了对当地丰富寄主植物的适应如何调节不同种群的表现。我发现,在一系列寄主植物物种中,毛虫都能很好地存活和生长,并有一些证据表明寄主植物与种群在表现上存在相互作用。与普遍的假设相反,橡树似乎是一种相对较差的寄主植物物种。占据广阔的营养生态位可能有助于冬蛾等消费者利用狭窄的物候生态位,寄主植物物种之间的物候差异可以缓冲它们与任何特定寄主植物物种的不同步。确定营养通性在消费者生态学中的重要性,是评估其作为潜在缓冲机制的作用,进而评估错配造成的真正威胁的关键性第一步。
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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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