Avian cranial evolution is influenced by shape interactions between hard and soft tissue traits

Changes in the structure and relative size of the brain are thought to be key transformations in the evolution of birds, reflecting innovations and diversity of neurosensory and cognitive capabilities. These changes do not occur in isolation, being accompanied by many other derived morphological characteristics. In the avian head alone, these include the evolution of a toothless beak, increase in relative eye size, and reduction and restructuring of jaw muscles. Several developmental trade-offs have been proposed to explain the interrelationships among these traits, but how these developmental patterns translate into evolutionary correlations among cranial traits is poorly understood. Here, we use two-block partial least squares analyses and Ornstein-Uhlenbeck models of adaptive trait evolution to explore the phenotypic evolution of hard and soft cranial tissues and test hypotheses of correlated trait evolution. In pairwise analyses, we found that all traits are significantly correlated..., , , # Avian cranial evolution is influenced by shape interactions between hard and soft tissue traits

[https://doi.org/10.5061/dryad.sxksn03dp](https://doi.org/10.5061/dryad.sxksn03dp)

## Description of the data and file structure

This repository contains all data, scripts and supplementary figures from \"**Avian cranial evolution is influenced by shape interactions between hard and soft tissue traits**.\"

## Code/software

All code is written for R (v. 2024.12.1+563), with required packages labelled at the start of each script. Packages should be installed prior to running scripts.

The scripts for replicating this study are in two parts (Morphometrics and mvSLOUCH) and are available via Zenodo. The morphometrics scripts generate the data input into the mvSLOUCH analysis and should be run first. The required input data for each set of scripts is included in Dryad in the relevant section. Instructions for constructing the phylogeny used in these analyses are included in the Phylogeny Cons...,

鸟类脑结构与相对脑容量的变化被认为是鸟类演化历程中的关键变革，反映了其神经感知与认知能力的革新与多样性。这类变化并非孤立发生，而是伴随诸多其他衍生形态特征共同演化。仅就鸟类头部而言，此类衍生特征包括无齿喙的演化、相对眼径的增大，以及颌肌的缩减与重构。已有多项发育权衡假说被用于阐释这些性状间的相互关联，但对于这些发育模式如何转化为颅骨性状间的演化相关性，目前仍知之甚少。本研究采用双块偏最小二乘（two-block partial least squares）分析与适应性性状演化的奥恩斯坦-乌伦贝克（Ornstein-Uhlenbeck）模型，探究颅骨硬组织与软组织的表型演化，并检验性状协同演化的相关假说。成对分析结果显示，所有性状均呈现显著相关性……
# 鸟类颅骨演化受软硬组织性状间的形状交互作用影响
https://doi.org/10.5061/dryad.sxksn03dp

## 数据与文件结构说明
本数据集仓库包含论文《鸟类颅骨演化受软硬组织性状间的形状交互作用影响》的全部数据、代码脚本与补充图表。

## 代码与软件
所有代码均针对R语言（版本2024.12.1+563）编写，各脚本开头已标注所需依赖包。运行脚本前需先安装对应依赖包。
本研究的复现脚本分为两部分（形态计量学与mvSLOUCH分析），可通过Zenodo获取。其中形态计量学脚本用于生成mvSLOUCH分析所需的输入数据，需优先运行。各脚本集的必要输入数据已收录于Dryad数据库的对应板块中。本分析所用系统发育树的构建说明收录于《Phylogeny Cons……》一文中（原文未完整显示）。