Does masting scale with plant size? High reproductive variability and low synchrony in small and unproductive individuals
Does masting scale with plant size? High reproductive variability and low synchrony in small and unproductive individuals
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DOI：
10.1093/aob/mcaa118
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发表时间：
2020-10-09
期刊：
影响因子：
4.2
通讯作者：
Kelly, Dave
中科院分区：
文献类型：
--
作者：
Bogdziewicz, Michal;Szymkowiak, Jakub;Kelly, Dave
背景和目的在一系列植物物种中，个体平均生殖力的分布是偏斜的，并由少数高生殖力的个体占主导地位。较大的植物产生更多的种子作物，但大小和繁殖模式之间的关系的确切性质知之甚少。这是特别清楚的植物，表现出同步的准周期性变化，在水果生产，一个过程中，称为masting.Methods，我们调查了协变的植物大小和繁殖力与单株水平的masting模式和种子捕食在12个桅杆播种物种：松树，黄芪，桃金娘，Querrus冬青。Q. humilis、矮Q. nibm，Q. alba，Q. montana、Chionopolia pallens、C. macro、Celmisia lyallii和Phormium tenax。关键结果生殖力与肥大模式呈非线性相关。小型和非生产性植物经常无法产生任何种子，这提高了它们的年度变化，降低了同步性。在低生育力的临界值之上。植物有相似的变异性和同步性，无论其大小和production.Conclusions我们的研究表明，种内的桅杆图案的变化与繁殖力的变化。这又与植物的大小有关。低生育力植物的低同步性表明，失败的年份是特异性的每个小植物，这反过来又意味着小植物不能繁殖，因为植物特定的因素（如内部资源限制）。因此，这些次级生产者的行为显然是在资源分配和环境限制方面进行权衡的结果，而这些资源分配和环境限制是小型工厂无法科普的。植物的大小，特别是繁殖力和桅杆故障年的倾向起着重要的作用，在确定植物繁殖的变异性和同步性。
Background and Aims In a range of plant species, the distribution of individual mean fecundity is skewed and dominated by a few highly fecund individuals. Larger plants produce greater seed crops, but the exact nature of the relationship between size and reproductive patterns is poorly understood. This is especially clear in plants that reproduce by exhibiting synchronized quasi-periodic variation in fruit production, a process called masting.Methods We investigated covariation of plant size and fecundity with individual-plant-level masting patterns and seed predation in 12 mast-seeding species: Pinus pinea, Astragalus scaphoides, So rbus aucuparia, Querrus ilex. Q. humilis, Q. nibm, Q. alba, Q. montana, Chionochloa pallens, C. macro, Celmisia lyallii and Phormium tenax.Key Results Fecundity was non-linearly related to masting patterns. Small and unproductive plants frequently failed to produce any seeds, which elevated their annual variation and decreased synchrony. Above a low fecundity threshold. plants had similar variability and synchrony, regardless of their size and productivity.Conclusions Our study shows that within-species variation in masting patterns is correlated with variation in fecundity. which in turn is related to plant size. Low synchrony of low-fertility plants shows that the failure years were idiosyncratic to each small plant, which in turn implies that the small plants fail to reproduce because of plant-specific factors (e.g. internal resource limits). Thus, the behaviour of these sub-producers is apparently the result of trade-offs in resource allocation and environmental limits with which the small plants cannot cope. Plant size and especially fecundity and propensity for mast failure years play a major role in determining the variability and synchrony of reproduction in plants.