Elevational trends in life histories: revising the pace-of-life framework
Elevational trends in life histories: revising the pace-of-life framework
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DOI：
10.1111/brv.12106
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发表时间：
2015-02-01
影响因子：
10
通讯作者：
Cooper, Caren B.
中科院分区：
文献类型：
--
作者：
Hille, Sabine M.;Cooper, Caren B.
鸟类的生活史特征，如寿命、成熟年龄和繁殖率，在不同的环境和组合中因权衡和生理机制的限制而有所不同。大量的研究描述了性状的多样性，并假设选择压力塑造了生存-繁殖权衡的组成部分。生活史变异似乎沿着慢-快的连续体下降，慢节奏的特征是对生存的投资高于繁殖，快节奏的特征是对繁殖的投资高于生存。生活节奏综合征（POLS）是描述生活史特征和生理特征的慢-快轴变化的一个框架。POLS对应于纬度梯度，热带鸟类表现出缓慢的生活节奏。我们研究了高海拔鸟类的特征可能对应于POLS连续体的四种可能的方式：（i）快速步伐，（ii）热带缓慢步伐，（iii）新的海拔步伐，或（iv）限制步伐。最近的研究表明，在温带高海拔地区繁殖的鸟类表现出一系列特征，创造了一种独特的海拔生活节奏，其核心权衡类似于慢节奏，但生理权衡更类似于快节奏。由于缺乏研究，无法考虑生活节奏受到限制的可能性。我们建议扩展POLS框架，包括海拔梯度的性状变异，以帮助调查全球地理格局的复杂性。
Life-history traits in birds, such as lifespan, age at maturity, and rate of reproduction, vary across environments and in combinations imposed by trade-offs and limitations of physiological mechanisms. A plethora of studies have described the diversity of traits and hypothesized selection pressures shaping components of the survival-reproduction trade-off. Life-history variation appears to fall along a slow-fast continuum, with slow pace characterized by higher investment in survival over reproduction and fast pace characterized by higher investment in reproduction over survival. The Pace-of-Life Syndrome (POLS) is a framework to describe the slow-fast axis of variation in life-history traits and physiological traits. The POLS corresponds to latitudinal gradients, with tropical birds exhibiting a slow pace of life. We examined four possible ways that the traits of high-elevation birds might correspond to the POLS continuum: (i) rapid pace, (ii) tropical slow pace, (iii) novel elevational pace, or (iv) constrained pace. Recent studies reveal that birds breeding at high elevations in temperate zones exhibit a combination of traits creating a unique elevational pace of life with a central trade-off similar to a slow pace but physiological trade-offs more similar to a fast pace. A paucity of studies prevents consideration of the possibility of a constrained pace of life. We propose extending the POLS framework to include trait variation of elevational clines to help to investigate complexity in global geographic patterns.