The Impacts of Changing Disturbance Regimes on Serotinous Plant Populations and Communities
The Impacts of Changing Disturbance Regimes on Serotinous Plant Populations and Communities
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DOI：
10.1525/bio.2013.63.11.5
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发表时间：
2013-11-01
期刊：
影响因子：
10.1
通讯作者：
Johnstone, Jill F.
中科院分区：
文献类型：
--
作者：
Buma, Brian;Brown, Carissa D.;Johnstone, Jill F.
预计气候变化将改变许多生态系统的扰动状况。其中最重要的影响是野火的频率，规模和强度的变化。林冠长期储存和种子的热诱导释放是一种在许多全球重要的陆地生态系统中发现的火灾恢复机制。生态系统中的生活史特征和地文差异导致生态系统的变化;因此，某些系统可能比其他系统对变化的干扰表现出更大的恢复力。我们提出了一个概念框架，探讨不断变化的干扰制度（如平均值和方差在火灾的严重程度或返回间隔）的后果，以破坏性物种和生态系统和影响改变破坏性的恢复力在当地和区域尺度。四个案例研究，并强调需要进一步研究的领域。这些研究表明，尽管火烈鸟具有良好的抗火能力，但更多的火灾并不一定意味着它们所发生的所有系统中的更多火烈鸟物种。
Climatic change is anticipated to alter disturbance regimes for many ecosystems. Among the most important effects are changes in the frequency, size, and intensity of wildfires. Serotiny (long-term canopy storage and the heat-induced release of seeds) is a fire-resilience mechanism found in many globally important terrestrial ecosystems. Life-history traits and physiographic differences in ecosystems lead to variation in serotiny; therefore, some systems may exhibit greater resilience to shifting disturbances than others do. We present a conceptual framework to explore the consequences of changing disturbance regimes (such as mean and variance in fire severity or return intervals) to serotinous species and ecosystems and implications of altered serotinous resilience at local and regional scales. Four case studies are presented, and areas needing further research are highlighted. These studies illustrate that, despite the reputed fire resilience of serotiny, more fire does not necessarily mean more serotinous species across all systems in which they occur.