QQ客服 官方微博 反馈留言

	A size-gradient hypothesis for alpine treeline ecotones
	George P. MALANSON; Lynn M. RESLER
刊名	Journal of Mountain Science
	2016-07
卷号	13期号:7页码:1154-1161
关键词	Competition Ecotone Environmental gradient Plant interaction Stress gradient Facilitation
ISSN号	1672-6316
通讯作者	George P. MALANSON
英文摘要	Research on the stress gradient hypothesis recognizes that positive (i.e. facilitative) and negative (i.e. competitive) plant interactions change in intensity and effect relative to abiotic stress experienced on a gradient. Motivated by observations of alpine treeline ecotones, we suggest that this switch in interaction could operate along a gradient of relative size of individual plants. We propose that as neighbors increase in size relative to a focal plant they improve the environment for that plant up to a critical point. After this critical point is surpassed, however, increasing relative size of neighbors will degrade the environment such that the net interaction intensity becomes negative. We developed a conceptual (not site or species specific) individual based model to simulate a single species with recruitment, growth, and mortality dependent on the environment mediated by the relative size of neighbors. Growth and size form a feedback. Simulation results show that the size gradient model produces metrics similar to that of a stress gradient model. Visualizations reveal that the size gradient model produces spatial patterns that are similar to the complex ones observed at alpine treelines. Size-mediated interaction could be a mechanism of the stress gradient hypothesis or it could operate independent of abiotic stress.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17255]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.7
推荐引用方式 GB/T 7714	George P. MALANSON,Lynn M. RESLER. A size-gradient hypothesis for alpine treeline ecotones[J]. Journal of Mountain Science,2016,13(7):1154-1161.
APA	George P. MALANSON,&Lynn M. RESLER.(2016).A size-gradient hypothesis for alpine treeline ecotones.Journal of Mountain Science,13(7),1154-1161.
MLA	George P. MALANSON,et al."A size-gradient hypothesis for alpine treeline ecotones".Journal of Mountain Science 13.7(2016):1154-1161.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。