Data from: Local distribution patterns of fleshy-fruited woody plants – examining the orchard hypothesis

This is the data from the article Local distribution patterns of fleshy-fruited woody plants – examining the orchard hypothesis (DOI: 10.1111/ecog.05359) Matilda Arnell, Johan Ehrlén and Ove Eriksson The study was carried out in the Tullgarn nature reserve (17°33'45E 58°57'56 N) in the province of Södermanland in Sweden. In the study area we established 15 sites. The sites were chosen to cover a range of potential habitats for fleshy-fruited woody species, and included those that were a priori expected as favourable habitats, e.g. forest edges, and less favourable habitats, e.g. within forests dominated by coniferous species (Picea abies and Pinus sylvestris). At the 15 sites we established three plots per site (45 plots) and at each plot we established subplots for the seedling recruitment experiment. Study design In 50 m radius circles at one of the three plots at each site we mapped all individuals of the local guild of fleshy-fruited woody trees and shrubs and recorded their height (or diameter at breast height) and reproductive status. This data is found in “spatial data_Arnell et al 2020.csv”. Please consult the readme-file for further details. In 50 m radius circles surrounding all three plots at each site we recorded presence/absence of reproductive individuals (displaying flowers or fruits) for the species included in the seedling recruitment experiment. This data is found in “plot scale data_Arnell et al 2020.csv”. Please consult the readme-file for further details. Seedling recruitment experiment At each plot, in subplots of 50 × 50 cm, we sowed 50 seeds of each of ten species of the local guild (figure 2A). The species were: Crataegus laevigata, Frangula alnus, Juniperus communis, Lonicera xylosteum, Prunus avium, Prunus padus, Prunus spinosa, Ribes alpinum, Rubus idaeus and Sorbus aucuparia. The seeds were gathered from fruits collected in the peak of the fruiting season of each species (mainly July-August, but October for J. communis, S. aucuparia and P. spinosa). We removed the pulp and allowed the seeds to dry in room temperature. The experiment was initiated in the autumn of 2015. In 2016 and 2017, we recorded seedlings on three occasions each year, between early June and early September. In 2018, we recorded seedlings and small juveniles once in June. At each occasion, the location of all seedlings was noted and used to identify individual recruits, and allowing us to identify new seedlings. All recruits were followed throughout the survey period. At all occasions, we also searched for seedlings of the study species in control plots (where no seeds were added) located adjacent to the sowing plots. The data from the seedling recruitment experiment is found in “plot scale data_Arnell et al 2020.csv”. Please consult the readme-file for further details.Spatially explicit patterns of associations Using the mapped positions of all individuals from the 50 m radius circles (spatial data_Arnell et al 2020.csv), we investigated distribution patterns by performing four different point pattern analyses. The analyses were performed in the software PROGRAMITA (Wiegand and Moloney 2014). Data reconfigured to be compatible with PROGRAMITA can be found in “data_PROGRAMITA.zip”. Please contact Matilda Arnell ([e-mail]) for information or collaboration. Please cite also the original article when using these data (DOI: 10.1111/ecog.05359).

本数据集来自论文《肉果木本植物的局部分布格局——检验果园假说》（Local distribution patterns of fleshy-fruited woody plants – examining the orchard hypothesis，DOI: 10.1111/ecog.05359），作者为Matilda Arnell、Johan Ehrlén与Ove Eriksson。
本研究在瑞典南曼兰省（Södermanland）的图尔加恩自然保护区（Tullgarn nature reserve，坐标：17°33'45E，58°57'56 N）开展。研究区域内共设置15个样点，所选样点覆盖肉果木本植物的各类潜在生境，既包含先验认定的适宜生境（如林缘），也包括相对不利的生境（如云杉（Picea abies）和欧洲赤松（Pinus sylvestris）主导的针叶林内部）。每个样点设置3个样方，总计45个样方；每个样方内均设置用于幼苗招募实验（seedling recruitment experiment）的小样方。

研究设计：
在每个样点的其中一个50米半径圆形样区中，对本地肉果木本乔灌木类群的所有个体进行定位绘图，记录其株高（或胸径（diameter at breast height））与繁殖状态。该数据存储于"spatial data_Arnell et al 2020.csv"，详细信息请参阅配套readme文件。
在每个样点的全部3个样方周边的50米半径圆形样区中，记录幼苗招募实验所用物种的繁殖个体（处于开花或结果期）的有无情况。该数据存储于"plot scale data_Arnell et al 2020.csv"，详细信息请参阅配套readme文件。

幼苗招募实验：
在每个样方的50×50 cm小样方中，播种本地类群10个物种的种子各50粒（见图2A）。所用物种为：光叶山楂（Crataegus laevigata）、欧鼠李（Frangula alnus）、欧洲刺柏（Juniperus communis）、鞑靼忍冬（Lonicera xylosteum）、欧洲甜樱桃（Prunus avium）、稠李（Prunus padus）、黑刺李（Prunus spinosa）、高山茶藨子（Ribes alpinum）、复盆子（Rubus idaeus）及花楸（Sorbus aucuparia）。
种子采集于各物种结实盛期的果实（主要为7-8月，欧洲刺柏、花楸和黑刺李为10月）。实验前去除果肉，将种子置于室温下晾干。实验于2015年秋季启动。
2016年与2017年，每年于6月初至9月初分三次记录幼苗存活情况；2018年仅于6月记录一次幼苗及小型幼株的存活情况。每次调查均记录所有幼苗的位置，以区分不同定植个体并统计新增幼苗。所有定植个体在整个调查周期内均被持续追踪。
每次调查同时，在播种样方相邻的未播种对照样方中，搜寻本研究物种的天然幼苗。幼苗招募实验的相关数据存储于"plot scale data_Arnell et al 2020.csv"，详细信息请参阅配套readme文件。

空间显式关联格局：
基于50米半径圆形样区的所有个体定位数据（"spatial data_Arnell et al 2020.csv"），通过4种不同的点格局分析（point pattern analysis）方法探究其分布格局。分析使用PROGRAMITA软件（Wiegand和Moloney 2014）完成。适配PROGRAMITA格式的重构数据存储于"data_PROGRAMITA.zip"。
如需获取相关信息或开展合作，请联系Matilda Arnell（邮箱：[e-mail]）。使用本数据集时，请同时引用原文（DOI: 10.1111/ecog.05359）。