The Cost of Reproduction in Annual Meadow Grass
The Cost of Reproduction in Annual Meadow Grass
复制标题
一年生草甸草的繁殖成本
DOI：
10.1086/283361
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
R. Law
中科院分区：
文献类型：
--
作者：
R. Law
对生命史进化的研究假设繁殖是有代价的，尽管几乎没有实验证据证明它们的存在。本文报道了一年生草地早熟禾（Poa annua L.）分析，以测试这些成本的存在。结果表明，生命早期的高繁殖率是要付出代价的，随后的低繁殖率和较小的植物尺寸。还有迹象表明，生命早期的高生育率增加了随后的死亡风险。一个可能的形式的关系被认为是从一个模型的繁殖，生长和生存。一年生草甸草的生活史的演变的观察和预测成本的影响进行了讨论。
Studies of the evolution of life histories assume that there are costs to reproduction, although there is little experimental evidence for their existence. In this paper some populations of annual meadow grass (Poa annua L.) are analyzed, to test for the existence of these costs. The results show that there is a price to be paid for high rates of reproduction early in life, in lower rates and smaller plant size subsequently. There are also signs that high rates of reproduction very early in life increase subsequent risks of mortality. A possible form for the relationship is considered from a model of reproduction, growth, and survival. The implications of the observed and predicted costs to the evolution of life histories in annual meadow grass are discussed.