Journal
ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
Volume 30, Issue 3, Pages 365-373Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.actao.2006.07.001
Keywords
clonal plant; compensation for herbivory; edaphic characteristics; gall midge; rhizome growth; solidago attissima; secondary succession
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During the middle stage of old-field succession, genets of clonal plants vie to take over space from annual and short-lived perennial plants. We studied factors that may influence the relative rates of expansion of Solidago altissima genets in an old-field population attacked by the gall midge Rhopalomyia solidaginis. Genets growing in more clayey soil expanded more slowly, as evidenced by differences in rhizome growth. Eclaphic conditions also affected galling frequencies, with genets in more sandy soil having twice as many galls. Gall midges reduced goldenrod stem growth, and stem height was positively correlated with rhizome growth. For a given stem height, galled ramets allocated relatively more biomass to rhizome growth than ungalled ramets. The end result was that galled ramets produced the same number and sizes of rhizomes as ungalled ramets. (c) 2006 Elsevier Masson SAS. All rights reserved.
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