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 th...1. 该论文标题提出的问题属于基础科学议题，令人意外的是，学界至今尚未明确其答案。近期构建的功能性状数据集（trait datasets）为解决该问题提供了契机，但受抽样偏差（sampling bias）影响，将此类数据集拓展至全球尺度仍极具挑战。尽管目前我们已掌握数万个物种的生长型信息，但这些数据并非全球物种多样性的随机抽样样本：部分演化支（clades）已被详尽刻画，而其余类群我们则知之甚少，甚至一无所知。 2. 我们以涵盖39313种维管植物（vascular plants）的木质化性状（woodiness）数据库为基础——该数据库覆盖了12%已完成分类鉴定的物种，其中59%为木质植物——通过随机化方法估算了其余已分类鉴定物种的木质化状态。为将本研究方法的结果与学界主流认知进行对比，我们非正式调研了广泛的生物学家群体。该问题尚未形成共识性答案，参与者的估算范围为1%至90%（平均值为31.7%）。 3. 在校正抽样偏差后，我们估算了……