Data from: How much of the world is woody?

1.The question posed by the title of this paper is a basic one, and it is surprising that the answer is not known. Recently assembled trait datasets provide an opportunity to address this, but scaling these datasets to the global scale is challenging because of sampling bias. Although we currently know the growth form of tens of thousands of species, these data are not a random sample of global diversity; some clades are exhaustively characterised, while others we know little–to–nothing about. 2.Starting with a database of woodiness for 39,313 species of vascular plants (12% of taxonomically resolved species, 59% of which were woody), we estimated the status of the remaining taxonomically resolved species by randomisation. To compare the results of our method to conventional wisdom, we informally surveyed a broad community of biologists. No consensus answer to the question existed, with estimates ranging from 1% to 90% (mean: 31.7%). 3.After accounting for sampling bias, we estimated the proportion of woodiness among the world's vascular plants to be between 45% and 48%. This was much lower than a simple mean of our dataset and much higher than the conventional wisdom. 4.Synthesis: Alongside an understanding of global taxonomic diversity (i.e., number of species globally), building a functional understanding of global diversity is an important emerging research direction. This approach represents a novel way to account for sampling bias in functional trait datasets and to answer basic questions about functional diversity at a global scale

Usage Notes
Results-woodinessAll results from the analyses conducted in the paper and results from our survey of researcherswood-supporting.tar.gz

本文标题所提出的问题乃基本之问，然其答案竟鲜为人知。近期汇集而成的性状数据集为我们提供了探讨这一问题的契机，然而，将这些数据集扩展至全球规模却面临着采样偏差的挑战。尽管我们目前已知数以万计物种的生长形态，但这些数据并非全球多样性的随机样本；某些类群被详尽地描述，而另一些类群则知之甚少。1. 基于此，我们从包含39,313种维管植物木质化数据库（占总分类学解析物种的12%，其中59%为木质植物）出发，通过随机化估计了剩余分类学解析物种的状况。为将我们方法的结果与传统智慧相比较，我们对广泛的生物学家群体进行了非正式调查。对于该问题的答案并未达成共识，估计值介于1%至90%（平均值：31.7%）。2. 考虑到采样偏差后，我们估计全球维管植物的木质化比例介于45%至48%之间。这一比例远低于我们数据集的简单平均值，却远高于传统智慧。3. 综述：在理解全球分类学多样性（即全球物种数量）的同时，构建全球多样性的功能性理解已成为一个重要的新兴研究方向。此方法代表了一种新颖的方式来解决功能性性状数据集中的采样偏差问题，并回答关于全球尺度功能性多样性的基本问题。使用说明
结果-木质化
所有论文中进行的分析结果以及我们对研究人员的调查结果均包含在wood-supporting.tar.gz文件中。