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On the balance between positive and negative plant interactions in harsh environments
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
1999 (English)In: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 86, no 3, 539-543 p.Article in journal (Refereed) Published
Abstract [en]

Positive interactions between plants typically occur where the presence of a species ameliorates the abiotic environment for another. However, there is also a potential for resource competition to act at the same time, which creates a situation where the net outcome is a balance between positive and negative interactions. We present data from a nine-year study in two extreme high alpine habitats that was designed to test whether the effects of established Ranunculus glacialis individuals on germination and growth of Oxyria, digyna are primarily positive or negative at the altitudinal limit of vascular plants. We show net effects ranging from neutral to negative, but no positive effects were detected. We also argue that close associations between plants in these harsh environments may both ameliorate and deteriorate the abiotic environment, and that experimental manipulations are necessary to tell the difference.

Place, publisher, year, edition, pages
1999. Vol. 86, no 3, 539-543 p.
Identifiers
URN: urn:nbn:se:umu:diva-39607ISI: 000082248200014OAI: oai:DiVA.org:umu-39607DiVA: diva2:394346
Available from: 2011-02-02 Created: 2011-02-02 Last updated: 2017-12-11Bibliographically approved

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