Shade tolerance controls the spectrum of crown sizes and its response to local competition across European and North American tree species: Implications for light interception strategies

The size of a tree and its crown are key drivers of its ability to intercept light. These characteristics are also constrained by biomechanical and hydraulic limitations, leading to tremendous variations in crown size and tree height between species. To date, there is no consensus on how covariation between crown characteristics (i.e., tree height, crown diameter and relative crown depth) control the spectrum of crown sizes, nor on the species characteristics (i.e., species climate niche or functional traits) that govern their variation. Using species-specific allometric relationships accounting for local competition data on individual crown characteristics of tree species across Europe and North America, we showed that the spectrum of tree crown size is mainly driven by two independent axes: one correlating tree height with relative crown depth, and another linking crown diameter to crown volume. While both angiosperms and gymnosperms exhibited similar patterns of covariation for these..., , # Shade tolerance controls the spectrum of crown sizes and its response to local competition across European and North American tree species: Implications for light interception strategies

Dataset DOI: [10.5061/dryad.612jm64g4](10.5061/dryad.612jm64g4)

## Description of the data and file structure

**Overall data description**

This repository provides the data required to replicate the analysis of the study entitled \"*S*hade tolerance controls the spectrum of crown sizes and its response to local competition across European and North American tree species. Implications for light interception strategies*.*\"

The code to implement all analyses is available in the following GitHub repository: [https://github.com/LauraTouzot/Tree_crown_allometry_DECLIC_Project.git](https://github.com/LauraTouzot/Tree_crown_allometry_DECLIC_Project.git)

The parameters of all fitted allometric equations for crown diameter, relative crown depth and tree height for all species used in the analysis are provi...,

树木的个体体型及其冠幅是决定其光截获能力的核心驱动因子。此类特征同时受生物力学与水力作用限制，致使不同物种间冠幅大小与树高存在显著分化。截至目前，学界尚未就冠部特征（即树高、冠径与相对冠深）间的协同变异如何调控冠幅大小谱系，以及支配该变异的物种特征（即物种气候生态位（climate niche）或功能性状（functional traits））形成统一共识。本研究整合横跨欧洲与北美地区的树种个体冠部特征数据与局地竞争信息，依托物种特异性异速生长关系（allometric relationships）开展分析，结果表明树木冠幅大小谱系主要由两个独立维度驱动：其一为树高与相对冠深的相关轴，其二为冠径与冠体积的关联轴。尽管被子植物（angiosperms）与裸子植物（gymnosperms）在上述协同变异模式上呈现相似特征……
# 《耐荫性调控欧洲与北美树种的冠幅大小谱系及其对局地竞争的响应：对光截获策略的启示》
数据集DOI：[10.5061/dryad.612jm64g4](10.5061/dryad.612jm64g4)

## 数据与文件结构描述
**总体数据描述**
本数据集仓库提供了复现上述研究论文分析所需的全部数据。
所有分析代码可通过以下GitHub仓库获取：[https://github.com/LauraTouzot/Tree_crown_allometry_DECLIC_Project.git](https://github.com/LauraTouzot/Tree_crown_allometry_DECLIC_Project.git)
本研究涉及的所有物种的冠径、相对冠深及树高的拟合异速生长方程参数已予以提供……