Host preference explains the high endemism of ectomycorrhizal fungi in a dipterocarp rainforest

In this study, we aimed to assess whether host preference could enhance the endemism of ectomycorrhizal (ECM) fungi that inhabit dipterocarp rainforests. Highly similar sequences of 175 operational taxonomic units (OTUs) for ECM fungi that were obtained from Lambir Hill’s National park, Sarawak, Malaysia, were searched for in a nucleotide sequence database. Using a two-step binomial model, the probability of presence for the query OTUs and the registration rate of barcode sequences in each country were simultaneously estimated. The results revealed that the probability of presence in the respective countries increased clearly with increasing species richness of Dipterocarpaceae and decreasing geographical distance from Lambir. Furthermore, most ECM fungi in Lambir were shown to be endemic to Malaysia and neighboring countries. These findings suggest that dispersal limitation as well as host preference are responsible for the high endemism of ECM fungi in dipterocarp rainforests. Moreove..., , , # Host preference explains the high endemism of ectomycorrhizal fungi in a dipterocarp rainforest

[https://doi.org/10.5061/dryad.k3j9kd5gs](https://doi.org/10.5061/dryad.k3j9kd5gs)

## Description of the data and file structure

\[**Input_data_Dataset1_97Per_102Con.csv**]

Input data for rstan analysis. For this input data, the operational taxonomic units of fungal barcode sequences were clustered using 97% sequence similarity threshold. Focal OTUs for the estimation are those of Dataset 1. The number of focal countries for the estimation is 102 (127 regions). This input data includes information of each country, such as the regional name (Region), the country name (Country), the latitude (lat) and longitude (lon) of the capital city (lat), the total number of OTUs deposited in the NCBI database (OTU), the number of singleton OTUs in the NCBI database (Singleton), the number of OTUs that were detected in the study site (detected), the natural logarithm of one plus species richness of D...

本研究旨在探究宿主偏好是否能够提升栖息于龙脑香科雨林的外生菌根真菌（ectomycorrhizal fungi, ECM）的特有性。研究从马来西亚沙捞越州兰比尔山国家公园获取了外生菌根真菌的175个操作分类单元（operational taxonomic unit, OTU）的高相似序列，并在核苷酸序列数据库中进行了检索。本研究采用两步式二项分布模型，同时估算了查询OTU的存在概率以及各国的条形码序列注册率。结果显示，各国的外生菌根真菌存在概率随龙脑香科物种丰富度的升高、与兰比尔山地理距离的缩短而显著上升。此外，兰比尔山的多数外生菌根真菌被证实为马来西亚及周边国家所特有。本研究结果表明，扩散限制与宿主偏好共同导致了龙脑香科雨林中外生菌根真菌的高度特有性。此外……# 宿主偏好解释龙脑香科雨林中外生菌根真菌的高度特有性
[https://doi.org/10.5061/dryad.k3j9kd5gs](https://doi.org/10.5061/dryad.k3j9kd5gs)

## 数据与文件结构说明
[**Input_data_Dataset1_97Per_102Con.csv**]
本文件为rstan分析的输入数据。该输入数据中，真菌条形码序列的操作分类单元以97%的序列相似度阈值完成聚类。本分析选用的目标OTU均来自数据集1，用于参数估算的目标国家共计102个（覆盖127个区域）。该输入数据包含各国的如下信息：区域名称（Region）、国家名称（Country）、首都的纬度（lat）与经度（lon）、美国国家生物技术信息中心（National Center for Biotechnology Information, NCBI）数据库中收录的OTU总数（OTU）、NCBI数据库中的单例OTU数量（Singleton）、本研究样地中检测到的OTU数量（detected）以及物种丰富度加1后的自然对数……