Abstract
The closely related species, diploidAnthoxanthum alpinum Á. Löve etD. Löve and tetraploidAnthoxanthum odoratum L., have distinct distributions:A. alpinum is an arctic-alpine species, whileA. odoratum is a species of lower altitudes and more southerly latitudes. However, some authors suggest that both species are potentially able to maintain their populations in the distribution area of the other species.
Reciprocal transplant experiments in two mountain localities (one withA. alpinum, the other withA. odoratum) were carried out to study the survival and vegetative and generative reproduction of tussocks of both species in the area of distribution of the other species. The mortality of tussocks ofA. alpinum was higher in the “alien” locality, the life span of tillers was greatly reduced and the size of tussocks decreased considerably during the experiment compared to its “native” locality. These results suggest that there was a lack of favourable microsites forA. alpinum in the “alien” locality probably caused by the presence of strong competitors.A. odoratum flowered far less in the “alien” locality (both on tussocks and tillers) compared to the “native” one. These results suggest that environmental conditions are not suitable for the flowering ofA. odoratum in the “alien” locality.
We conclude thatA. alpinum could have been limited in extending its distribution into the area ofA. odoratum by the presence of strong competitors, whileA. odoratum could have been limited by its ability to reproduce by seed.
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Flegrová, M., Krahulec, F. Anthoxanthum odoratum andA. alpinum: Life history parameters at two different altitudes. Folia Geobot 34, 19–31 (1999). https://doi.org/10.1007/BF02803074
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DOI: https://doi.org/10.1007/BF02803074