Trematode infection prevalence increases with snail richness: Observations from a 4-year study of snail-trematode interactions

Digenean trematodes are often characterized as being more specific with their gastropod first intermediate hosts than with the other hosts in their complex life cycles. Trematodes can be host specialists or generalists, sometimes exhibiting greater specialization at specific life stages. Digenean trematodes are valuable study organisms for exploring how biodiversity influences disease. In this study, we investigated the relationship between snail richness and trematode infection prevalence using data from a four-year study (2019-2022) of eight wetland sites in Alberta, Canada. Trematode species were classified as specialists or generalists at the first-intermediate host level, and generalized linear mixed-effects models were employed to assess the relationship between snail richness and overall, generalist, and specialist infection prevalence. The findings indicate that as snail richness increased, there was a significant increase in the overall and generalist infection prevalence. This..., , , # Data from: Trematode infection prevalence increases with snail richness: Observations from a 4-year study of snail-trematode interactions

[https://doi.org/10.5061/dryad.ghx3ffc0v](https://doi.org/10.5061/dryad.ghx3ffc0v)

## Description of the data and file structure

As part of a larger study, snails were collected during four summers (June to September 2019-2022) from eight reclaimed wetlands approximately 25 kilometers northeast of Edmonton, Alberta, Canada. Snails were collected by hand or dip net and transported to the laboratory, where they were shed for trematode cercariae. Trematode infections were identified using DNA sequencing and assigned as specialist or generalist based on their observed interactions with snail hosts in this study.

#### Files and variables

**Archive.zip**

Description:

Includes the R scripts and associated data files for models and plots presented in the manuscript.

Bipartite_diagrams_script.R

Effect_of_snail_richness_on_trematode_richness.R

expan...,

复殖吸虫（Digenean trematodes）通常被认为相较于其复杂生活史中的其他宿主，对其腹足类第一中间宿主（gastropod first intermediate hosts）的专一性更强。吸虫可分为宿主专性类群与宿主广性类群，有时会在特定生活史阶段表现出更强的宿主专一性。复殖吸虫是探究生物多样性如何影响疾病传播的优质研究模式生物。本研究依托加拿大阿尔伯塔省8处湿地站点2019-2022年为期4年的调查数据，分析了螺类丰富度与吸虫感染率之间的关联。研究中，我们依据第一中间宿主层面的宿主利用特征，将吸虫物种划分为专性类群与广性类群，并采用广义线性混合效应模型（generalized linear mixed-effects models）评估了螺类丰富度与总体、广性类群及专性类群吸虫感染率之间的关系。研究结果显示，随着螺类丰富度提升，总体感染率与广性类群吸虫感染率均出现显著升高。……
# 数据来源：《吸虫感染率随螺类丰富度升高而增加：加拿大阿尔伯塔省4年螺类-吸虫相互作用研究观测结果》
[https://doi.org/10.5061/dryad.ghx3ffc0v](https://doi.org/10.5061/dryad.ghx3ffc0v)

## 数据与文件结构说明
作为一项更大规模研究的组成部分，研究人员于2019-2022年的四个夏季（6月至9月），在加拿大阿尔伯塔省埃德蒙顿市东北约25公里处的8处修复湿地（reclaimed wetlands）中采集了螺类样本。螺类通过手捡或抄网（dip net）采集，随后被转运至实验室进行吸虫尾蚴（cercariae）逸出培养。通过DNA测序（DNA sequencing）鉴定吸虫感染情况，并基于本研究中观察到的螺类-宿主相互作用特征，将吸虫划分为专性类群或广性类群。

#### 文件与变量说明
**Archive.zip**
说明：包含本论文中用于生成模型与图表的R脚本及配套数据文件。
Bipartite_diagrams_script.R
Effect_of_snail_richness_on_trematode_richness.R
expan……