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Title
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The reproductive behaviour of a clonal herbaceous plant, the long-leaved Sundew **Drosera intermedia** in different heatland habitats
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Author
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Abstract
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| The reproductive behaviour of the longleaved sundew Drosera intermedia Hayne was studied in three hydrologically differing heathland habitats: a pool edge, an old path through the wet heath and a seepage area. Sexual reproductive allocation (SRA) (the slope of thc regression of sexual on vegetative biomass in a given season) differed strongly between years (related to temperature and precipitation) and habitats. Averaged over years. path plants had a higher SRA than plants in the seepage area and at the pool edge. Asexual reproductive allocation. expressed as thc size-dependent probability of reproducing asexually, did not differ between habitats in most years. The observations agreed with general life history theory. SRA was high in the path habitat where adult survival chances were low and juvenile (= seed, first year seedling) survival was high. SRA was lower in the seepage area where adult survival chances were higher and juvenile survival lower. At the pool edge, a habitat with high adult mortality and low juvenile establishment, the predicted optimal reproductive behaviour, a high SRA, was not observed due to environmental constraints (inundation). |
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Language
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English
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Source (journal)
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Ecography. - Copenhagen
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Publication
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Copenhagen
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1992
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ISSN
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0906-7590
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Volume/pages
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15
:2
(1992)
, p. 144-153
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ISI
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A1992JC91700002
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