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The effect of a north-facing forest edge on tree water use in a boreal Scots pine stand
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
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2002 (English)In: Canadian Journal of Forest Research, ISSN 0045-5067, Vol. 32, no 4, 693-702 p.Article in journal (Refereed) Published
Abstract [en]

Tree water use and growth increment were studied in a north-facing forest edge of a 70 year old mono-specific stand of Scots pine (Pinus sylvestris) trees growing on poor sandy soils in the northern boreal zone of Sweden. The forest edge in this study bordered a clear-cut established two decades ago. There were differences in water use and growth increment during the growing season between trees growing at the forest edge and trees growing in the forest interior. These differences were likely related to soil conditions, such as access to soil moisture, soil temperature and soil frost conditions, whereas an effect of above ground microclimate was not found. The estimated tree water use and growth increment over one growing season tended to be larger for trees at the edge zone relative to those from the interior. The variability of the measured tree water fluxes was high, especially for the edge zone trees. There were also structural differences between the two groups of trees, most notably in the radial profile of conductive xylem, in tree height and in green crown length, but these differences were on the limits of statistical significance. The estimated seasonal transpiration was low, about 70 mm when estimated exclusively for trees from the forest interior and 107 mm when estimated exclusively for trees at the forest edge. This illustrates the likely magnitude of water use enhancement due to the conditions specific to forest edge.

Place, publisher, year, edition, pages
2002. Vol. 32, no 4, 693-702 p.
Keyword [en]
edge effect, sap flow, transpiration, sapwood, increment, microclimate, soil frost
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:miun:diva-4524Local ID: 5584OAI: oai:DiVA.org:miun-4524DiVA: diva2:29556
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-09-05Bibliographically approved

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Mellander, Per-Erik
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