The interactive effects of heat stress, parasitism, and hostplant quality in a host-parasitoid system

Species interactions are expected to change in myriad ways as the frequency and magnitude of extreme temperature events increase with anthropogenic climate change. The relationships between endosymbionts, parasites, and their hosts are particularly sensitive to thermal stress, which can have cascading effects to other trophic levels. We investigate the interactive effects of heat stress and parasitism on a terrestrial tritrophic system consisting of two hostplants (one common, high-quality plant and one novel, low-quality plant), a caterpillar herbivore, and a specialist parasitoid wasp. We used a fully-factorial experiment to determine the bottom-up effects of the novel hostplant on both the caterpillars’ life history traits and the wasps’ survival, and the top-down effects of parasitism and heat shock on caterpillar developmental outcomes and herbivory levels. Hostplant identity interacted with thermal stress to affect wasp success, with wasps performing better on the low-quality host..., The corresponding author collected this dataset at UNC-Chapel Hill facilities in 2020. It has been processed through Google Sheets, and then R. , , # The interactive effects of heat stress, parasitism, and hostplant quality in a host-parasitoid system These data are used to create all of the figures and conduct all of the analyses found in the manuscript. All data were collected and analyzed by the corresponding author (A. Parker). ## Description of the data and file structure MsCcHSFeedJan1MOD.csv *Used to calculate all caterpillar developmental data, wasp success data, and Figs 2-4* **Note:** All blank values in the dataset reflect developmental stages that that individual did not experience. For example, non-parasitized caterpillars will not have any values under `date.para` or `num.para`, since they were never parasitized. Similarly, individuals that did not reach instars beyond 5th will have absent values for `date.6th` and `mass.6th`. Individuals that died before the end of the experiment were not massed at time of death, so their `date.max` and `mass.max` columns are also empty. *The exception is the `date.pupa` colum...随着人为气候变化（anthropogenic climate change）导致极端高温事件的发生频率与强度持续提升，物种间的相互作用预计将以多样的形式发生改变。内共生生物（endosymbionts）、寄生虫与其宿主之间的关系对热胁迫尤为敏感，该效应可对其他营养级（trophic levels）产生级联效应。本研究针对一个陆地三营养级系统，探究了热胁迫与寄生作用的交互影响，该系统包含两种宿主植物（一种为常见优质植物，另一种为新型低质植物）、一种鳞翅目植食性幼虫（caterpillar herbivore）以及一种专性寄生蜂（specialist parasitoid wasp）。我们采用完全析因实验（fully-factorial experiment）设计，明确了新型宿主植物对幼虫生活史性状（life history traits）与寄生蜂存活率的自下而上（bottom-up）效应，以及寄生作用与热激（heat shock）对幼虫发育结局与植食水平的自上而下（top-down）效应。研究结果显示，宿主植物种类与热胁迫会交互影响寄生蜂的繁殖成功率，寄生蜂在低质宿主植物上的表现更佳…… 本数据集由通讯作者于2020年在北卡罗来纳大学教堂山分校（UNC-Chapel Hill）的实验设施中采集完成，数据先后通过谷歌表格（Google Sheets）与R语言进行处理。 # 寄主-寄生蜂系统中热胁迫、寄生作用与宿主植物质量的交互效应 本数据集用于生成该学术论文中的全部图表，并支撑所有分析内容，所有数据均由通讯作者A. Parker采集并分析。 ## 数据与文件结构说明 `MsCcHSFeedJan1MOD.csv` *用于计算所有幼虫发育数据、寄生蜂存活数据，并绘制图2至图4* **注意：** 数据集中的所有空白值代表该个体未经历对应的发育阶段。例如，未被寄生的幼虫不会有`date.para`（寄生日期）或`num.para`（寄生数量）项下的数值，因其从未被寄生。同理，未发育至6龄的个体，其`date.6th`（第6龄日期）与`mass.6th`（第6龄体重）列将无对应数值。在实验结束前死亡的个体未在死亡时称重，因此其`date.max`（最大体重日期）与`mass.max`（最大体重）列同样为空值。唯一的例外是`date.pupa`（蛹期日期）列……