Life-history trade-offs vary with resource availability across the geographic range of a widespread plant.
Life-history trade-offs vary with resource availability across the geographic range of a widespread plant.
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生活史权衡随着分布广泛的植物地理范围内的资源可用性而变化。
DOI：
10.1111/plb.12682
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发表时间：
2018
期刊：
影响因子：
3.9
通讯作者：
María B. García
中科院分区：
文献类型：
--
作者：
J. Villellas;María B. García
繁殖、生长和生存之间的权衡源于植物资源的有限可获得性。环境压力预计会加剧这些负相关性，但还没有研究评估不同物种地理范围内生活史权衡的变化。在这里，我们分析了在欧洲广泛传播的草本植物车前草在纬度范围内的生长和繁殖成本。我们监测了11个种群的数千只冠毛虫的表现，并测试了生长和繁殖对一系列生命率(生长、存活概率、繁殖概率和繁殖力)的影响是否随当地降雨量和土壤肥力而变化。为了说明内部资源在个体之间的差异，我们分析了修正大小差异的权衡。生长受到以前的生长和繁殖的负面影响。我们还发现，生长和繁殖的成本对生存、繁殖概率和繁殖力都有影响，但仅限于土壤肥力较低的种群。成本也随着降雨量的增加而增加，可能是由于与洪水有关的压力。相比之下，生长与随后的存活呈正相关，在特定环境下，连续几年的繁殖存在正向协变，这是利用暂时良性条件的潜在策略。总体而言，我们发现，在整个冠毛虫地理范围内，生命率之间既有负相关，也有正相关。在压力条件下，取舍占主导地位，特别是在相关性状之间，如多年来的生殖投资，出现了正相关。通过分析压力梯度上的多个不同的适应度成分，我们可以更好地理解物种范围内的生活史进化，以及它们对环境变化的反应。
Trade-offs between reproduction, growth and survival arise from limited resource availability in plants. Environmental stress is expected to exacerbate these negative correlations, but no studies have evaluated variation in life-history trade-offs throughout species geographic ranges. Here we analyse the costs of growth and reproduction across the latitudinal range of the widespread herb Plantago coronopus in Europe. We monitored the performance of thousands of individuals in 11 populations of P. coronopus, and tested whether the effects of growth and reproduction on a set of vital rates (growth, probability of survival, probability of reproduction and fecundity) varied with local precipitation and soil fertility. To account for variation in internal resources among individuals, we analysed trade-offs correcting for differences in size. Growth was negatively affected by previous growth and reproduction. We also found costs of growth and reproduction on survival, reproduction probability and fecundity, but only in populations with low soil fertility. Costs also increased with precipitation, possibly due to flooding-related stress. In contrast, growth was positively correlated with subsequent survival, and there was a positive covariation in reproduction between consecutive years under certain environments, a potential strategy to exploit temporary benign conditions. Overall, we found both negative and positive correlations among vital rates across P. coronopus geographic range. Trade-offs predominated under stressful conditions, and positive correlations arose particularly between related traits like reproduction investment across years. By analysing multiple and diverse fitness components along stress gradients, we can better understand life-history evolution across species' ranges, and their responses to environmental change.
影响因子：
6.6
作者：
Nakagawa, Shinichi;Schielzeth, Holger
通讯作者：
Schielzeth, Holger