Temperature and Resources Interact to Affect Transmission via Host Foraging Rate and Susceptibility

IF 7.6 1区 环境科学与生态学 Q1 ECOLOGY
Ecology Letters Pub Date : 2025-06-24 DOI:10.1111/ele.70151
Daniel C. Suh, Katie Schroeder, Alexander T. Strauss
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Abstract

Environmental conditions such as temperature and resource availability can shape disease transmission by altering contact rates and/or the probability of infection given contact. However, interactive effects of these factors on transmission processes remain poorly understood. We develop mechanistic models and fit them to experimental data to uncover how temperature and resources jointly affect transmission of fungal parasites (Metschnikowia bicuspidata) in zooplankton hosts (Daphnia dentifera). Model competition revealed interactive effects of temperature and resources on both contact rates (host foraging) and the probability of infection given contact (per-parasite susceptibility). Foraging rates increased with temperature and decreased with resources (via type-II functional response), but this resource effect weakened at warmer temperatures due to shorter handling times. Per-parasite susceptibility increased with resources at cooler temperatures but remained consistently high when warmer. Our analysis demonstrates that temperature and resources interact to shape transmission processes and provides a general theoretical framework for other host–parasite systems.

Abstract Image

Abstract Image

温度和资源相互作用通过寄主觅食率和敏感性影响传播
温度和资源供应等环境条件可以通过改变接触率和/或接触后感染的可能性来影响疾病传播。然而,这些因素对传播过程的相互作用仍然知之甚少。我们建立了机制模型,并将其与实验数据相匹配,以揭示温度和资源如何共同影响真菌寄生虫(Metschnikowia bicuspidata)在浮游动物宿主(Daphnia dentifera)中的传播。模型竞争揭示了温度和资源对接触率(宿主觅食)和接触后感染概率(单个寄生虫易感性)的交互影响。觅食率随温度的升高而升高,随资源的增加而降低(通过ii型功能响应),但由于处理时间的缩短,这种资源效应在温度升高时减弱。在较冷的温度下,每寄生虫的敏感性随着资源的增加而增加,但在较暖的温度下,敏感性始终保持在较高水平。我们的分析表明,温度和资源相互作用形成传播过程,并为其他宿主-寄生虫系统提供了一般的理论框架。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ecology Letters
Ecology Letters 环境科学-生态学
CiteScore
17.60
自引率
3.40%
发文量
201
审稿时长
1.8 months
期刊介绍: Ecology Letters serves as a platform for the rapid publication of innovative research in ecology. It considers manuscripts across all taxa, biomes, and geographic regions, prioritizing papers that investigate clearly stated hypotheses. The journal publishes concise papers of high originality and general interest, contributing to new developments in ecology. Purely descriptive papers and those that only confirm or extend previous results are discouraged.
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