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Dactylorhiza orchids are known for their high variation in morphology and distinct varieties have been named in D. incarnata s.l. However, it is not known how these varieties interact in mixed populations and why they remain stable. We conducted three field experiments in West-Estonian populations of D. incarnata to examine if the two most common varieties co-occurring these are separated from each...
The roles of herbivory and pollination success in plant reproduction have frequently been examined, but interactions between these two factors have gained much less attention. In three field experiments, we examined whether artificial defoliation affects allocation to attractiveness to pollinators, pollen production, female reproductive success and subsequent growth in Platanthera bifolia L. (Rich...
. We established two parallel greenhouse experiments to empirically test the effect of experimental design on the conclusions made of the effects of plant species richness on ecosystem functioning. The experiments included an identical group of six grassland plants and were performed under identical environmental conditions, but were set up according to two different designs. In the richness design...
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