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.

热带雨林的选择性采伐或可助推外来入侵植物的种群增长。入侵植物对资源可获得性提升的响应能力——尤其是生殖性状层面的响应——可使其在受纳群落的种子雨（seed rain）中占比提升。入侵性先锋树种五蕊贝卢西亚木（*Bellucia pentamera*，野牡丹科（Melastomataceae））目前正在印度尼西亚西加里曼丹省的古农帕隆国家公园内扩散；该公园此前曾发生多起非法小规模选择性采伐事件，这类活动似乎助推了该入侵物种的种群扩张与蔓延。

本研究首先以挂果频率作为结实量的替代指标，对比了五蕊贝卢西亚木与200余属本土树木群落的相关特征。随后，研究团队基于13个月的物候数据，构建了两个广义线性自回归移动平均（Generalized Linear Autoregressive Moving Average, GLARMA）模型，以对比选择性采伐与自然倒木干扰情境下，五蕊贝卢西亚木的挂果频率与结实量。

在所考察的200余个本土树木属中，五蕊贝卢西亚木的挂果频率显著高于所有类群。该入侵物种对选择性采伐呈现正向响应：采伐样地内的挂果概率与结实量至少提升了一倍。五蕊贝卢西亚木的高种子产量在热带雨林林隙树木群落的抽彩式竞争（lottery competition）中尤为不利——这类群落中，种子雨中的物种优势度至关重要。此外，五蕊贝卢西亚木对选择性采伐的生殖响应表明，该采伐方式或在东南亚的此类入侵事件中发挥了重要的助推作用。