IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2016  > Vol13 No.7
A size-gradient hypothesis for alpine treeline ecotones
George P. MALANSON; Lynn M. RESLER
Corresponding AuthorGeorge P. MALANSON
2016-07
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume13Issue:7Pages:1154-1161
Subtype期刊论文
AbstractResearch 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.
KeywordCompetition Ecotone Environmental Gradient Plant Interaction Stress Gradient Facilitation
DOI10.1007/s11629-016-3984-5
Indexed BySCI
Language英语
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17255
CollectionJournal of Mountain Science_Journal of Mountain Science-2016_Vol13 No.7
Recommended Citation
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.
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