Contrasting impacts of land use change on phylogenetic and functional diversity of tropical forest birds

1.Biodiversity conservation strategies increasingly target maintaining evolutionary history and the resilience of ecosystem function, not just species richness (SR). This has led to the emergence of two metrics commonly proposed as tools for decision making: phylogenetic diversity (PD) and functional diversity (FD). Yet the extent to which they are interchangeable remains poorly understood.

2.We explore shifts in and relationships between FD and PD of bird communities across a disturbance gradient in Borneo, from old-growth tropical forest to oil palm plantation.

3.We show a marked decline in PD, and an increase in phylogenetic mean nearest taxon distance (MNTD) from forest to oil palm, in line with declining SR across the gradient. However, phylogenetic mean pairwise distance (MPD) is constrained by forest logging more than by conversion to oil palm, taking account of SR.

4.The decline in FD across the gradient is less severe than in PD, with all metrics indicating relatively ...

1. 生物多样性保护策略愈发聚焦于维持进化历史与生态系统功能的恢复力，而非仅关注物种丰富度（species richness, SR）。由此催生了两种常被提议作为决策工具的指标：系统发育多样性（phylogenetic diversity, PD）与功能多样性（functional diversity, FD）。然而二者的可互换程度仍未得到充分阐明。
2. 我们探究了婆罗洲地区沿干扰梯度（从原始热带森林到油棕种植园）的鸟类群落的功能多样性（FD）与系统发育多样性（PD）的变化及其相互关系。
3. 研究结果显示，从森林到油棕种植园的梯度中，系统发育多样性（PD）显著下降，而系统发育平均最近分类单元距离（phylogenetic mean nearest taxon distance, MNTD）则有所上升，这与该梯度下物种丰富度（SR）的下降趋势一致。不过，在考虑物种丰富度（SR）的情况下，系统发育平均成对距离（phylogenetic mean pairwise distance, MPD）受森林采伐的限制程度要高于转为油棕种植园的影响。
4. 沿该梯度的功能多样性（FD）下降幅度较系统发育多样性（PD）更为平缓，所有指标均显示出相对……