Inter-annual variation in seed production has increased over time (1900–2014)
Inter-annual variation in seed production has increased over time (1900–2014)
复制标题
种子产量的年际变化随着时间的推移而增加（1900-2014）
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
W. Koenig
中科院分区：
文献类型：
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作者：
I. Pearse;J. M. LaMontagne;W. Koenig
桅杆播种，或桅杆，是高度可变的和空间同步生产的种子的植物种群。可变种子作物的生产通常与天气相关，因此全球气候变化是否改变了桅杆的可变性或桅杆事件的大小是相当有趣的。我们汇编了1900-2014年世界各地的1086个植物种子生产数据集，然后分析了种子集的变异系数（CV）是否随着时间的推移而增加。在这115年的时间里，整个植物的结实率变得更加多变，尤其是针叶树和橡树的研究更为深入。CV的增加对应于植物物种的种子集的长期平均值的下降。种子集CV增加到更大的程度，在植物类群与桅杆的倾向。结实率在几年中变得越来越多变，特别是对于已知其桅杆事件会影响动物种群的植物类群。繁殖的这种微妙变化可能对生态系统产生广泛的影响，因为种子作物为广泛的分类群提供关键资源，并在整个食物网中产生级联效应。
Mast seeding, or masting, is the highly variable and spatially synchronous production of seeds by a population of plants. The production of variable seed crops is typically correlated with weather, so it is of considerable interest whether global climate change has altered the variability of masting or the size of masting events. We compiled 1086 datasets of plant seed production spanning 1900–2014 and from around the world, and then analysed whether the coefficient of variation (CV) in seed set, a measure of masting, increased over time. Over this 115-year period, seed set became more variable for plants as a whole and for the particularly well-studied taxa of conifers and oaks. The increase in CV corresponded with a decrease in the long-term mean of seed set of plant species. Seed set CV increased to a greater degree in plant taxa with a tendency towards masting. Seed set is becoming more variable among years, especially for plant taxa whose masting events are known to affect animal populations. Such subtle change in reproduction can have wide-ranging effects on ecosystems because seed crops provide critical resources for a wide range of taxa and have cascading effects throughout food webs.