With implications for optimal management regimes iva Schödelbauerová, Jana Jersáková & Pavel Kindlmann



Дата18.04.2016
Памер2.38 Kb.
#9385
EFFECTS OF SHADING ON PERFORMANCE OF DACTYLORHIZA MAJALIS WITH IMPLICATIONS FOR OPTIMAL MANAGEMENT REGIMES
Iva Schödelbauerová, Jana Jersáková & Pavel Kindlmann
Many European orchid species are strongly dependent on proper management of the site, especially on regular mowing. Absence of mowing results in accumulation of dead plant biomass and thus reduction of light available for orchid photosynthesis, especially in early growing species. The consequences of lack of light on individual aspects of orchid performance are, however, unknown. Therefore we examined here the effect of shading (reduction of light by 50% and 75%) on various aspects of performance of the orchid species Dactylorhiza majalis. We found that the shaded plants have a larger leaf area and their leaves are more elongated. Shading also lowers seed weight and viability, probability of flowering and number of flowers in the following season. From these results, conclusions for optimal management of this species are drawn.


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