Biogeography and phylogeny of masting: do global patterns fit functional hypotheses?
Biogeography and phylogeny of masting: do global patterns fit functional hypotheses?
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DOI：
10.1111/nph.16617
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
I. Pearse;J. M. LaMontagne;Michael C. Lordon;A. Hipp;W. Koenig
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文献类型：
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作者：
I. Pearse;J. M. LaMontagne;Michael C. Lordon;A. Hipp;W. Koenig
种子作物（CVp）的年际变化对植物种群和食物网有着深远的影响，高CVp被称为“桅杆”。我们在此提出：全球变异CVp更好地预测植物或栖息地的差异与适应性规模经济一致，其中花和种子的好处增加不成比例在主年份;或被动机制，其中种子生产响应与气候变异性相关的资源可用性的变化？为了解决这个问题，我们编制了一个数据集的植物，包括920个时间序列跨越311种植物的长期水果/种子生产的系统发育比较分析。与CVp（风授粉和种子传播）和气候变率（夏季降水的变化）的适应性效益相关的因素是CVp全球变化的最佳预测因子。我们观察到一个驼峰形的关系CVp和纬度和中间的系统发育和地理信号CVp。CVp在整个地球仪和植物生命树上是非随机模式化的，其中高CVp与受益于种子或花卉生产规模经济的物种以及在种子通常成熟时经历夏季降雨量变化的物种相关。
Interannual variability of seed crops (CVp) has profound consequences for plant populations and food webs, where high CVp is termed 'masting'. Here we ask: is global variation in CVp better predicted by plant or habitat differences consistent with adaptive economies of scale, in which flower and seed benefits increase disproportionately during mast years; or to passive mechanisms, in which seed production responds to variation in resource availability associated with climate variability? To address this question, we compiled a dataset for phylogenetic comparative analysis of long-term fruit/seed production for plants comprising 920 time-series spanning 311 plant species. Factors associated with both adaptive benefits of CVp (wind pollination and seed dispersal) and climatic variability (variability of summer precipitation) were among the best predictors of global variation in CVp. We observed a hump-shaped relationship between CVp and latitude and intermediate phylogenetic and geographic signals in CVp. CVp is patterned non-randomly across the globe and over the plant tree of life, where high CVp is associated with species benefiting from economies of scale of seed or flower production and with species that experience variable rainfall over summer months when seeds usually mature.