Local adaptation in trait-mediated trophic cascades dataset

Predator-induced changes in prey foraging can indirectly influence community dynamics by increasing the abundance of basal resources via a trait-mediated trophic cascade. The strength of these cascades may be altered by eco-evolutionary relationships between predators and prey, but the role of basal resources has received limited attention. We hypothesized that the strength of trait-mediated trophic cascades may be shaped by selection from trophic levels above and below prey. Our field and laboratory experiments utilized snails (Nucella lapillus) from two regions in the Gulf of Maine (GoM) that vary substantially in basal resource (e.g., barnacles, mussels) availability and invasion history with the predatory green crab, Carcinus maenas. Nucella from both regions were provided with mussels as a basal resource and exposed to the presence or absence of green crab risk cues. In both experiments, Nucella from the northern GoM, where basal resources are scarce, displayed weaker responses to ..., , , # **Local adaptation in trait-mediated trophic cascades dataset**

### **Description of the data and file structure**

The dataset contains seven Excel spreadsheets which encompass all of the data used in statistical analyses mentioned in this manuscript. All data are presented in tabular form. Spreadsheet descriptions and column definitions are provided below.

**FieldExperiment_ConsumptionData** - Contains the data used in analyses of mussel consumption per capita during the field experiment.

FieldExperiment_ConsumptionData: *Column names and definitions*

* **Row_Id** – Numbers each row in the dataset excluding the headers.

* **Region** – Denotes the region of the Gulf of Maine that *Nucella* were collected from and outplanted to for the field experiment.

* **Site** – Indicates the site (population) that *Nucella* were collected from and outplanted to for the field experiment.

* **Treatment** – Indicates whether *Nucella* received green crab risk cue treatment or contro...

捕食者诱导的猎物觅食行为改变，可通过性状介导的营养级联（trait-mediated trophic cascade）提升基底资源丰度，进而间接影响群落动态。捕食者与猎物间的生态进化关系可能改变这类级联效应的强度，但学界对基底资源的作用关注度仍较为有限。我们提出如下假说：性状介导的营养级联强度或由猎物上下营养级的选择压力所塑造。

本研究的野外与室内实验所用对象为来自缅因湾（Gulf of Maine, GoM）两个区域的狗岩螺（Nucella lapillus），这两个区域的基底资源（如藤壶、贻贝）可获得性以及与捕食性欧洲绿蟹（Carcinus maenas）的入侵历史均存在显著差异。我们为两个区域的狗岩螺均提供贻贝作为基底资源，并设置有无绿蟹风险信号的处理组。在两项实验中，来自基底资源匮乏的缅因湾北部的狗岩螺对（风险信号）的响应强度更弱……

# **性状介导营养级联的本地适应数据集**

### **数据与文件结构说明**
本数据集包含7张Excel电子表格，涵盖本文手稿中提及的所有统计分析所用数据。所有数据均以表格形式呈现。下文将给出各电子表格的说明以及各列的定义。

**FieldExperiment_ConsumptionData**——包含野外实验中单位个体贻贝摄食量的统计分析所用数据。

FieldExperiment_ConsumptionData: *列名与定义*
* **Row_Id**——为数据集内除表头外的每一行分配唯一编号。
* **Region**——指示野外实验中狗岩螺的采集与移植的缅因湾内区域。
* **Site**——指示野外实验中狗岩螺的采集与移植的样地（种群）。
* **Treatment**——指示狗岩螺接受的处理方式：为绿蟹风险信号处理组或对照组……