Inorganic mineral nutrient level studies on Potamogeton pectinatus L. and Enteromorpha prolifera in Forfar Loch, Scotland

Abstract

Samples of the aquatic plants Potamogeton pectinatus L . and Enteromorpha prolifera and loch water were collected from 14 sites in Forfar Loch, Scotland in the summer of 1976 . The nutrients, including nitrogen, phosphorus, potassium, sodium, calcium, magnesium and iron in the plants together with those present in the water samples were analysed and found to be high . Significant correlations in the nitrogen (r = 0.805), phosphorus (r = 0 .941), calcium (r = -0 .649) and magnesium (r = -0 .412) levels were apparent between the water and the Potamogeton plant tissue . Similarly for Enteromorpha, negative correlations were observed for the minerals potassium (r = -0 .439) and calcium (r = -0 .763) in the tissue and that of the corresponding loch water .

The ecology of Potamogeton species in central North America

“…pectinatus to occur at high parameter values mirrors the results of numerous other widely scattered studies (e.g. Moyle, 1945;Spence, 1967;Walker & Coupland, 1970;Seddon, 1972;Reynolds & Reynolds, 1975;Hinneri, 1976;Ho, 1979;Hellquist, 1980;Kadono, 1982). Hellquist (1980) suggested that I?…”

Recurrence of the world’s largest green-tide in 2009 in Yellow Sea, China: Porphyra yezoensis aquaculture rafts confirmed as nursery for macroalgal blooms

“…9). The process of dislodged of filaments of U. prolifera and the subsequent forming of small floating patches which then aggregate and expand due to continued vegetative growth was described previously by Ho (1979) and Perkins and Abbott (1972). Using known growth rates for U. prolifera in the Yellow Sea of 10-37% per day (Liang et al, 2008), we calculated that 4956 tonnes of U. prolifera was sufficient to generate a green-tide of the 2008 magnitude (%1 million tonnes) within 17 and 56 days.…”

Evaluation quantitative de la biomasse végétale en Durance à l'aval du barrage de Serre-Ponçon

“…De nombreux auteurs (Sculthorpe 1967, Haslam 1975, Ozimek 1978, Ho 1979, Dykyjova et al, 1985, La Chavanne et al, 1986) ont constaté la présence de P pectinatus à proximité d'effluents d'origine organique. Cette espèce est capable de supporter de fortes concentrations en ammoniaque (Dykyjova et al, 1985) et en matières organiques dissoutes (Pip 1984).…”

“…D'après les données de la littérature P. Pectinatus semble exigeant en ce qui concerne la texture du substrat. Anderson (1978) et Ho (1979) constatèrent que les /? pectinatus poussant sur les substrats sableux II est probable qu'en Durance la texture du substrat puisse intervenir dans la répartition de P. pectinatus.…”