Asynchrony among species and functional groups and temporal stability under perturbations: Patterns and consequences

1. A number of theoretical and empirical studies have demonstrated effects of perturbations on ecosystem stability. Compensatory dynamics among taxonomic units have been proposed as a major mechanism regulating the temporal stability of biomass production (hereafter “temporal stability”). However, most studies have focused on the effects of species asynchrony on temporal stability in response to perturbations, and few studies examined how compensatory changes among functional groups affected temporal stability.

2. Here, we conducted a 4-year functional group removal experiment and a 4-year experimental warming and nitrogen addition experiment in an alpine meadow of Qinghai-Tibetan Plateau to investigate the effects of perturbations (functional group removal, experimental warming and nitrogen addition) on temporal stability and the potential mechanisms.

3. In both experiments, temporal stability was positively related to both species and functional group asynchrony. However, spec...

1. 诸多理论与实证研究均已证实，扰动（perturbations）对生态系统稳定性具有显著影响。分类群（taxonomic units）间的补偿动态（compensatory dynamics）被认为是调控生物量生产（biomass production）时间稳定性（temporal stability，以下简称"时间稳定性"）的核心机制之一。然而，现有多数研究多聚焦于物种异步性（species asynchrony）对扰动响应下的时间稳定性的影响，极少有研究探讨功能群（functional groups）间的补偿变化如何作用于时间稳定性。
2. 本研究于青藏高原（Qinghai-Tibetan Plateau）的高寒草甸（alpine meadow）开展了两项为期4年的野外控制实验：功能群移除实验与模拟增温（experimental warming）结合氮添加（nitrogen addition）实验，以探究扰动（包括功能群移除、模拟增温与氮添加）对时间稳定性的影响及其潜在作用机制。
3. 两项实验结果均显示，时间稳定性与物种异步性及功能群异步性呈显著正相关。然而，原文此处未完整呈现