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|Title:||Seasonal and Vertical Changes in the Surface Area/Biomass Ratio of Potamogeton Lucens L. in a Clear and a Turbid Shallow Lake|
|Authors:||FELDMANN Tonnu; NOGES Peeter|
|Citation:||JOURNAL OF AQUATIC PLANT MANAGEMENT vol. 47 p. 116-121|
|Publisher:||AQUATIC PLANT MANAGEMENT SOC|
|Type:||Articles in periodicals and books|
|Abstract:||To determine the influence of different growth conditions on the architecture of Potamogeton lucens L., we measured several morphological parameters of the plants from May to September 2001 in a clear macrophyte-dominated lake and a turbid phytoplankton-dominated lake in Central Estonia. The main difference between the lakes was the higher summer water transparency in the macrophyte-dominated lake. All size related parameters of P. lucenstended to be largerin the macrophyte-dominated lake, but only the total above-ground plant surface area and the surface area of leaves differed significantly (p< 0.05) between lakes. The relationship between surface area (A, in cm2) and dry weight (DW, in g) for the measured 25-cm sections of above-ground parts of the plants could be described as: A = 312.9 ± 9.4 DW + 26.5 ± 6.8 (± standard error) (R2= 0.649;n= 607;p< 0.001) Better light conditions in summer and shorter wind fetch in the macrophyte-dominated lake were likely factors stimulating further ramification on the plants in August and a more uniform vertical distribution of plant surfaces in this lake compared to the plankton-dominated lake.|
|JRC Directorate:||Sustainable Resources|
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