全球智库信息集成服务系统(G2TT): Plant diversity and drought: The role of deep roots.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1016/j.ecolmodel.2014.05.008
	Plant diversity and drought: The role of deep roots.
	Lindh M; Zhang L; Falster D; Franklin O; Brannstrom Å
发表日期	2014
出处	Ecological Modelling 290: 85-93
出版年	2014
语种	英语
摘要	Extreme temperatures and droughts in the wake of climate change potentially threaten plant diversity. A strategy that plants use to improve survival during seasonal drought is to establish deep roots, aptly named tap roots for their ability to tap into groundwater. Little is known, however, about the role of deep roots in maintaining plant diversity. Here, we extend an established model of plants canopies by Iwasa et al. (1985), in which plants of different heights compete for light, to allow strategic investments in an optional tap root. We investigate how emerging diversity varies with water table depth, soil water gradient and drought-induced mortality rate. Having a tap root enables plants to reach deep water, thus reducing mortality, but also carries a construction cost, thus inducing a tradeoff. We find (1) that tap roots maintain plant diversity under increasing drought mortality, (2) that tap roots evolve when ground water is accessible at low to intermediate depths, (3) no viable strategies at high drought mortality and deep water table, and (4) Red Queen evolutionary dynamics in mixed communities with and without tap root.
主题	Evolution and Ecology (EEP) ; Ecosystems Services and Management (ESM)
关键词	Tap root Drought Diversity Light competition Evolution Adaptive dynamics
URL	http://pure.iiasa.ac.at/id/eprint/10853/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/129992
推荐引用方式 GB/T 7714	Lindh M,Zhang L,Falster D,et al. Plant diversity and drought: The role of deep roots.. 2014.