气候变化领域集成服务门户(CCPortal): Mechanisms of seed mass variation along resource gradients

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DOI	10.1111/ele.13179
	Mechanisms of seed mass variation along resource gradients
	DeMalach N.; Ron R.; Kadmon R.
发表日期	2019
ISSN	1461023X
卷号	22 期号:1
英文摘要	The enormous variation in seed mass along gradients of soil resources has fascinated plant ecologists for decades. However, so far, this research has focused on the description of such variation, rather than its underlying mechanisms. Here we experimentally test a recent model relating such variation to two fundamental properties of plant growth: allometry of biomass growth and size-asymmetry of light competition. According to the model, mean seed mass should increase, and the variance of seed mass should show a unimodal response, to increasing soil resource availability (productivity). We test these predictions and their underlying assumptions using a combination of field observations, mesocosm experiments and greenhouse experiments focusing on Mediterranean annual plants. Our results support the predictions and assumptions of the model, and allow us to reject alternative models of seed mass variation. We conclude that growth-allometry and size-asymmetric light competition are key drivers of seed-mass variation along soil resource gradients. © 2018 John Wiley & Sons Ltd/CNRS
英文关键词	Annual plants; community-weighted mean; community-weighted variance; competition-colonisation trade-off; functional diversity; functional traits; grassland; productivity; seed size; soil depth
语种	英语
scopus关键词	biomass; plant; plant seed; soil; Biomass; Plants; Seeds; Soil
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121194
作者单位	Department of Biology, Stanford University, Stanford, CA 94305, United States; Department of Ecology, Evolution and Behavior, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel
推荐引用方式 GB/T 7714	DeMalach N.,Ron R.,Kadmon R.. Mechanisms of seed mass variation along resource gradients[J],2019,22(1).
APA	DeMalach N.,Ron R.,&Kadmon R..(2019).Mechanisms of seed mass variation along resource gradients.Ecology Letters,22(1).
MLA	DeMalach N.,et al."Mechanisms of seed mass variation along resource gradients".Ecology Letters 22.1(2019).