SEEDLINGS
SEEDLINGS
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DOI：
10.1111/j.1469-8137.1987.tb04681.x
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发表时间：
1987-05-01
期刊：
影响因子：
9.4
通讯作者：
FENNER, M
中科院分区：
文献类型：
--
作者：
FENNER, M
本文研究了引起幼苗死亡的因素，并试图确定它们在田间所受到的选择力。在简单地处理定义幼苗的困难后，我研究了最近文献中的几个案例，其中幼苗死亡的原因被确定和量化，无论是在自然条件下监测种群，还是通过实验操纵环境。特别脆弱的直接后发芽阶段的说明和一致低估的幼苗损失在许多研究中提出。一些有趣的情况下，邻居对幼苗死亡率的影响进行检查，它表明，最近的邻居可能会影响幼苗的机会被放牧。它的结论是，由于幼苗死亡的原因-是如此多样的和不可预测的，在大多数栖息地，个体可塑性可能提供一个更好的生存策略比高度专业化的适应特定的死亡因素。
SummaryThe factors which cause the death of seedlings were examined and an attempt was made to determine the selective forces to which they are subjected in the field. After briefly dealing with the difficulties of defining a seedling, I examine a few cases from the recent literature in which the causes of seedling mortality are identified and quantified either by monitoring populations under natural conditions or by manipulating the environment experimentally. The special vulnerability of the immediate post‐germination phase is illustrated and the consistent underestimation of seedling loss in many studies is suggested. Some interesting cases of the effects of neighbours on seedling mortality are examined and it is shown that nearest neighbours may affect a seedling's chance of being grazed. It is concluded that since the causes of seedling mortality‐are so varied and unpredictable in most habitats, individual plasticity may provide a better strategy for survival than highly specialized adaptations to specific mortality factors.