Understanding the recruitment response of juvenile Neotropical trees to logging intensity using functional traits

Selective-logging remains a widespread practice in tropical forests, yet the long-term effects of timber-harvest on juvenile tree (i.e., sapling) recruitment across the hundreds of species occurring in most tropical forests, remain difficult to predict. This uncertainty could potentially exacerbate threats to some of the thousands of timber-valuable tree species in the Amazon. Our objective was to determine to what extent long-term responses of tree species regeneration in logged forests can be explained by their functional traits. We integrate functional trait data for 13 leaf, stem, and seed traits from 25 canopy tree species with a range of life histories, such as the pioneer Goupia glabra and the shade-tolerant Iryanthera hostmannii, together with over 30-years of sapling monitoring in permanent plots spanning a gradient of harvest intensity at the Paracou Forest Disturbance Experiment (PFDE), French Guiana. We anticipated that more-intensive logging would increase recruitment o...择伐（Selective-logging）仍是热带森林的普遍经营实践，但针对多数热带森林中数百个树种的木材采伐对幼树（juvenile tree，即幼苗（sapling））更新的长期效应，目前仍难以精准预测。此种不确定性或会进一步加剧亚马孙流域数千种具木材经济价值树种所面临的生存威胁。本研究旨在明确：采伐林分中树种更新的长期响应在多大程度上可通过其功能性状（functional traits）加以解释。我们整合了25种冠层树种（canopy tree species）的13项叶、茎及种子功能性状数据，这些树种涵盖多样生活史策略，例如先锋树种圭巴卫矛（Goupia glabra）与耐荫树种*Iryanthera hostmannii*，同时结合了法属圭亚那帕拉库森林干扰实验（Paracou Forest Disturbance Experiment, PFDE）内横跨采伐强度梯度的永久样地中长达30余年的幼苗监测数据。我们预期，强度更高的采伐会提升幼苗更新……