An experimental study of the plastic responses of Ranunculus peltatus Schrank to four environmental parameters |
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Authors: | C Garbey G Thiébaut S Muller |
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Institution: | (1) LBFE, Université de Metz, 2, avenue du Général Delestraint, 57070 Metz, France |
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Abstract: | The impact of four environmental parameters (water depth, type of substratum, current velocity and light intensity), on Ranunculus peltatus morphology and reproduction was tested in four 1 month semi- controlled experiments. Four development stages were underlined
from April to August 2001 in R. peltatus: an elongation stage (April–June), a flowering stage (May–June), a fragmentation stage (June–July) and a potential regenerative
stage (July–August). Water depth was therefore tested on R. peltatus elongation, type of substratum on R. peltatus elongation and flowering, current velocity on R. peltatus fragmentation and light intensity on its possible regeneration. The maximum development was measured for a 32 cm water depth.
Current velocity did not have a significant effect on R. peltatus fragmentation. Regeneration depended strongly on light availability. This stage occurred only for unshaded or 50% shaded
plants. Darkness prevented plants from regrowing. |
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Keywords: | Batrachium spreading macrophyte morphological traits current velocity light intensity water depth |
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