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- Title
Tree species versus regional controls on ecosystem properties and processes: an example using introduced Pinus contorta in Swedish boreal forests.
- Authors
McIntosh, Anne C. S.; Macdonald, S. Ellen; Gundale, Michael J.
- Abstract
When species are introduced into new regions, there is great uncertainty whether the trait differences of the introduced species or regional factors, such as climate or edaphic properties, will serve as the dominant control of ecosystem properties or processes. In this study, we examined whether the introduction of Pinus contorta Douglas ex Loudon into Sweden has altered forest floor properties and processes or whether these properties are more strongly controlled by regional factors. We compared forest floor pH, potential N mineralization rates, bulk density, litter and forest floor depths, C and N concentrations and pool sizes, C:N ratios, and soil microbial communities using substrate-induced respiration and phospholipid fatty acid analysis among stands of introduced P. contorta (SwPc), native Swedish Pinus sylvestris L. (SwPs), and native Canadian P. contorta (CaPc). For most forest floor properties (pH, net NH4+ mineralization, bulk density, N mass, and the microbial phospholipid fatty acid community structure), SwPc sites were more similar to SwPs than to CaPc, whereas litter and forest floor depth were significantly higher in SwPc than the two other forest types. Our findings suggest that regional factors exerted a stronger control on most forest floor properties and processes than did species differences between the two Pinus species for the regions we studied.
- Subjects
MULTIPURPOSE trees; LODGEPOLE pine; TAIGAS; ECOSYSTEM management; FOREST litter; PHOSPHOLIPIDS; FATTY acids
- Publication
Canadian Journal of Forest Research, 2012, Vol 42, Issue 7, p1228
- ISSN
0045-5067
- Publication type
Article
- DOI
10.1139/x2012-049