Data from: Prolific fruit output by the invader Bellucia pentamera (Melastomataceae) is enhanced by selective logging disturbance

Selective logging in tropical rain forests may promote population growth of invasive plants. The ability of invaders to respond, specifically in reproductive traits, to increases in resource abundance may allow them to increase their presence in the seed rain of recipient communities. The invasive pioneer tree Bellucia pentamera (Melastomataceae) is currently spreading within Gunung Palung National Park in West Kalimantan, Indonesia. The park has also experienced periods of illegal, small-scale, selective logging that seem to have facilitated population growth and spread of this invader. We first used fruiting frequency as a proxy for fruit output to make comparisons between B. pentamera and the native tree community of over 200 genera. We then constructed two Generalized Linear Autoregressive Moving Average (GLARMA) models using 13 months of phenology data to predict both fruiting frequency and crop size of B. pentamera under selective logging versus natural treefall disturbance regimes.
Bellucia pentamera fruited at considerably higher frequency than all 200 native genera considered. This invader also responded positively to selective logging with both odds of being in fruit and crop sizes at least doubling in logged plots. Prolific seed output of B. pentamera is especially problematic within the lottery competition of tropical rainforest gap tree communities, in which prominence in the seed rain is particularly important. Furthermore, the reproductive response of B. pentamera to selective logging suggests that this harvesting practice may have a considerable role in facilitating this invasion in Southeast Asia.

热带雨林选择性采伐或可助推外来入侵植物的种群增长。入侵植物针对资源丰度提升产生的响应能力——尤其是繁殖性状层面的响应——可使其在接收群落的种子雨（seed rain）中占比提升。目前，入侵性先锋树种Bellucia pentamera（野牡丹科Melastomataceae）正在印度尼西亚西加里曼丹的帕隆贡山国家公园（Gunung Palung National Park）内扩散。该公园也曾经历多段非法小规模选择性采伐时段，此类活动似乎助推了该入侵物种的种群扩张与扩散。本研究首先以挂果频率作为结实量的替代指标，对比了B. pentamera与200余属本土树木群落的差异。随后，本研究基于13个月的物候数据，构建了2个广义线性自回归移动平均模型（Generalized Linear Autoregressive Moving Average，GLARMA），以预测选择性采伐与自然林木倒伏两种干扰制度下，B. pentamera的挂果频率与结实量。
Bellucia pentamera的挂果频率显著高于本研究纳入的全部200余个本土类群。该入侵物种对选择性采伐亦呈现正向响应：采伐样地内的挂果概率与结实量至少提升了一倍。Bellucia pentamera的高种子产出在热带雨林林隙树木群落的抽签式竞争（lottery competition）中尤为棘手，而种子雨占比在此类群落中至关重要。此外，B. pentamera对选择性采伐的生殖响应表明，该采伐模式或在东南亚地区的该类入侵事件中发挥了显著的助推作用。