Structured demographic buffering: A framework to explore the environment drivers and demographic mechanisms underlying demographic buffering

Structured demographic buffering: A framework to explore the environment drivers and demographic mechanisms underlying demographic buffering
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结构化人口缓冲:探索人口缓冲背后的环境驱动因素和人口机制的框架

DOI:
10.1101/2023.07.20.549848
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发表时间:
2023
期刊:
--
影响因子:
--
通讯作者:
Gascoigne S
Gascoigne S
中科院分区:
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文献类型:
--
作者:
Gascoigne S

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环境随机性是种群生存能力的关键决定因素。几十年来探索环境随机性如何影响种群动态的工作突显了一些自然种群限制环境随机性的负面影响的能力,这些策略之一是人口缓冲。虽然存在各种方法来量化人口缓冲,但我们仍然不知道哪些环境因素和人口特征对在自然人口中观察到的人口缓冲负有最大责任。在这里,我们引入一个框架来量化人口缓冲的三个关键驱动因素的相对影响:环境因素(例如,时间自相关性和方差)、人口结构和人口比率(例如,进步和生育率)。使用积分投影模型,我们探索了这些驱动因素如何影响三个具有不同生活史的植物物种的人口缓冲能力,并展示了我们的方法如何成功地表征了种群在不断变化的世界中从人口统计上缓冲环境随机性的能力。
Environmental stochasticity is a key determinant of population viability. Decades of work exploring how environmental stochasticity influences population dynamics have highlighted the ability of some natural populations to limit the negative effects of environmental stochasticity, one of these strategies being demographic buffering. Whilst various methods exist to quantify demographic buffering, we still do not know which environment factors and demographic characteristics are most responsible for the demographic buffering observed in natural populations. Here, we introduce a framework to quantify the relative effects of three key drivers of demographic buffering: environment components (e.g., temporal autocorrelation and variance), population structure, and demographic rates (e.g., progression and fertility). Using Integral Projection Models, we explore how these drivers impact the demographic buffering abilities of three plant species with different life histories and demonstrate how our approach successfully characterises a population’s capacity to demographically buffer against environmental stochasticity in a changing world.
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