Successional syndromes of saplings in tropical secondary forests emerge from environment-dependent trait–demography relationships,Ecology Letters

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Successional syndromes of saplings in tropical secondary forests emerge from environment-dependent trait–demography relationships
Ecology Letters ( IF 7.6 ) Pub Date : 2021-06-25 , DOI: 10.1111/ele.13784
Hao Ran Lai _{1,

2,

3} , Dylan Craven ₄ , Jefferson S Hall ₅ , Francis K C Hui ₆ , Michiel van Breugel _{1,

2,

5}

Affiliation

Identifying generalisable processes that underpin population dynamics is crucial for understanding successional patterns. While longitudinal or chronosequence data are powerful tools for doing so, the traditional focus on community-level shifts in taxonomic and functional composition rather than species-level trait–demography relationships has made generalisation difficult. Using joint species distribution models, we demonstrate how three traits—photosynthetic rate, adult stature, and seed mass—moderate recruitment and sapling mortality rates of 46 woody species during secondary succession. We show that the pioneer syndrome emerges from higher photosynthetic rates, shorter adult statures and lighter seeds that facilitate exploitation of light in younger secondary forests, while ‘long-lived pioneer’ and ‘late successional’ syndromes are associated with trait values that enable species to persist in the understory or reach the upper canopy in older secondary forests. Our study highlights the context dependency of trait–demography relationships, which drive successional shifts in sapling's species composition in secondary forests.

中文翻译：

热带次生林树苗演替综合征源于环境依赖性特征-人口学关系

确定支持种群动态的可概括过程对于理解演替模式至关重要。虽然纵向或时间序列数据是这样做的强大工具，但传统上关注分类和功能组成的群落水平变化而不是物种水平的特征 - 人口统计学关系使得概括变得困难。使用联合物种分布模型，我们展示了三个性状——光合速率、成年身高和种子质量——如何在次生演替期间调节 46 种木本物种的补充和幼苗死亡率。我们表明，先锋综合征源于较高的光合速率、较短的成年身材和较轻的种子，这些有助于在较年轻的次生林中利用光，而“长寿先锋”和“晚期演替”综合症与使物种能够在林下持续存在或到达较旧次生林中的上层树冠的特性值相关。我们的研究强调了性状-人口关系的背景依赖性，这推动了次生林中树苗物种组成的连续变化。

更新日期：2021-08-10

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