Considerable genetic diversity and structure despite narrow endemism and limited ecological specialization in the Hayden's ringlet, Coenonympha haydenii

Understanding the processes that underlie the development of population genetic structure is central to the study of evolution. Patterns of genetic structure can reveal signatures of isolation by distance, barriers to gene flow, or even the genesis of speciation. However, it is unclear how severe range restriction might impact the processes that dominate the development of genetic structure. In narrow endemic species, is population structure likely to be adaptive in nature, or rather the result of genetic drift? In this study, we investigated patterns of genetic diversity and structure in the narrow endemic Hayden's ringlet butterfly. Specifically, we asked to what degree genetic structure in the Hayden's ringlet can be explained by isolation by distance, isolation by resistance (in the form of geographic or ecological barriers to migration between populations), and isolation by environment (in the form of differences in host plant availability and preference). We employed a genotyping-..., This data archive contains ecological data and genome-by-sequencing (GBS) data collected from Hayden's ringlet butterflies, Coenonympha haydenii. This archive also contains scripts and Bayesian models used for processing and analyzing these data.  Ecological data collected include the following:

potential larval host plant community assemblage data for 12 sampling sites where Hayden's ringlets are abundant,
female oviposition preference assay data, and
larval herbivory preference assay data.

Ecological data were used to assess whether C. haydenii butterflies show a preference for using grass (Poa pratensis) vs. a sedge (Carex hoodii) as a larval host, and whether host preferences varied by population. Single nucleotide polymorphism data were used to estimate the degree of genetic differentiation among populations of Hayden's ringlets sampled, as well as for Bayesian models to assess the degree to which genetic differentiation in this species is associated with host plant community ass..., , # Considerable genetic diversity and structure despite narrow endemism and limited ecological specialization in the Hayden's ringlet, Coenonympha haydenii

## Data description and file structure

This data archive contains five directories. Within each directory an additional README.txt file can be found that describes file content and usage details for that particular directory. Information about how data were formatted for analyses and how the individual analyses were conducted can be found in the associated R-script for each analysis. The last section of each R-script displays summary tables and model results and provides explanations regarding the interpretation of these summaries. The five directories included in this archive are as follows:

1. C_haydenii_EEMS_input_files

This directory contains the input files and parameters necessary to run the program EEMS (Estimated Effective Migration Surfaces) using C. haydenii genetic distance data generated from this project. This ...

解析种群遗传结构形成的核心过程，是进化生物学研究的核心议题之一。种群遗传结构的分布模式，能够揭示距离隔离、基因流障碍乃至物种形成起源的分子印记。然而，目前尚不清楚极端的分布范围限制，会如何影响主导遗传结构形成的关键过程。对于狭域特有物种而言，其种群结构究竟是适应性演化的结果，还是遗传漂变的产物？
本研究以狭域特有物种海登眼蝶（Hayden's ringlet butterfly，学名Coenonympha haydenii）为研究对象，对其遗传多样性与种群遗传结构模式展开调查。具体而言，本研究旨在解答：海登眼蝶的种群遗传结构在多大程度上可由以下三种隔离机制解释：距离隔离、阻力隔离（以种群间迁移的地理或生态障碍为表现形式），以及环境隔离（以寄主植物的可获得性与取食偏好差异为表现形式）。本研究采用了genotyping-... 本数据集存档包含从海登眼蝶（Coenonympha haydenii）采集得到的生态学数据与基因组测序（genome-by-sequencing, GBS）数据，同时存档了用于处理与分析这些数据的脚本与贝叶斯模型。
所采集的生态学数据如下：
1. 12个海登眼蝶高密度分布采样点的潜在幼虫寄主植物群落组成数据；
2. 雌性成虫产卵偏好测定数据；
3. 幼虫取食偏好测定数据。
本研究利用生态学数据评估了海登眼蝶是否偏好以草地早熟禾（Poa pratensis）或胡德氏薹草（Carex hoodii）作为幼虫寄主，以及不同种群间的寄主偏好是否存在差异。单核苷酸多态性（Single Nucleotide Polymorphism, SNP）数据被用于估算采样的海登眼蝶种群间的遗传分化程度，同时也被用于贝叶斯模型以评估该物种的遗传分化与寄主植物群落组成ass..., 相关研究的标题为：《海登眼蝶（Coenonympha haydenii）虽为狭域特有且生态特化程度有限，却拥有可观的遗传多样性与种群结构》

## 数据描述与文件结构
本数据集存档包含5个目录，每个目录下均附带README.txt文件，用于说明该目录下文件的内容与使用细节。关于数据分析的数据格式化方法与具体分析流程，可查阅各分析对应的R脚本。每个R脚本的最后部分会展示汇总表格与模型结果，并对这些结果的解读提供相关说明。本存档包含的5个目录如下：
1. C_haydenii_EEMS_input_files
该目录包含运行EEMS（有效迁移面估算程序，Estimated Effective Migration Surfaces）所需的输入文件与参数，所用的遗传距离数据来自本项目生成的海登眼蝶（C. haydenii）遗传数据……