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  • 1
    Electronic Resource
    Electronic Resource
    Growth, chlorophyll and mineral nutrient studies on phalaris arundinaceae L. in three scottish lochs (1979)
    Springer
    Hydrobiologia 63 (1979), S. 33-43 
    Details
    ISSN: 1573-5117
    Keywords: Mineral content ; growth study ; chlorophyll content ; Phalaris arundinaceae ; Scottish lochs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Growth, chlorophyll and mineral nutrients studies were made in Phalaris arundinaceae L. in three Scottish lochs of varying nutrient status from March to November in 1975. The maximum shoot height and shoot dry weight attained by the plants were approximately 160 cm and 4 g respectively. Seasonal changes in the chlorophyll levels in the Phalaris leaf were studied and two peaks were found, one in April and the other in June–July. Maximum chlorophyll level attained was 9 mg g−1 leaf dry weight. The changes in the mineral levels in the root, stem, leaf and inflorescence parts of the plants from the three lochs were also assayed throughout the growing season. A total of eight mineral elements were studied, including carbon, nitrogen, phosphorus, potassium, sodium, calcium, magnesium and iron. Variations in both the mineral concentrations and their pattern of changes during the study period among the plants from the lochs were observed and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021014
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical composition studies on some aquatic macrophytes in three Scottish lochs. I. Chlorophyll, ash, carbon, nitrogen and phosphorus. (1979)
    Springer
    Hydrobiologia 63 (1979), S. 161-166 
    Details
    ISSN: 1573-5117
    Keywords: Chemical composition studies ; chlorophyll content ; carbon ; nitrogen ; phosphorus ; freshwater macrophytes ; Scottish lochs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The chlorophyll, ash, carbon, nitrogen and phosphorus levels in seven species of freshwater macrophytes (Juncus effusus L., Iris pseudacorus L., Carex rostrata Stokes, Glyceria maxima (Hartm.) Holmberg, Nuphar lutea (L) Sm., Polygonum amphibium L. and Schoenoplectus lacustris (L) Pallas) in three Scottish lochs of different trophic levels were studied during 1975. Mean chlorophyll levels varied from a minimum of 1.73 mg g−1 dry weight in Balgavies Loch Juncus to 10.22 mg g−1 dry weight for Forfar Loch Iris. Carbon contents ranged from 450 to 520 mg g−1 ash-free dry weight. For ash, nitrogen and phosphorus, significant differences in mean concentrations were detected among plant species as well as within one plant species growing in different lochs. Positive correlations were apparent between the degree of eutrophication in the study areas and the amount of ash, phosphorus and nitrogen present in the plants growing in them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00030079
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  • 3
    Electronic Resource
    Electronic Resource
    Development of foliage structure i1n Phragmites australis (Cav.) Trin. ex steudel stands in Scottish lochs (1980)
    Springer
    Hydrobiologia 70 (1980), S. 159-164 
    Details
    ISSN: 1573-5117
    Keywords: Foliage development ; chlorophyll content ; leaf surface area ; leaf production ; Phragmites australis ; Scottish lochs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Development of foliage structure in Phragmites australis (Cav.) Trin. ex Steudel stands in three Scottish lochs in 1975 was studied. Both tagged and harvested shoots were utilized to monitor the seasonal changes in the chlorophyll content, net leaf number, rate of shoot elongation, leaf production, leaf fall and leaf area increase, and individual leaf size in the reed-stands from the three study areas. Quantitative measurements of the number of leaf and leaf surface area in 25 cm stratified layers in the shoots were also made during active canopy development from May to August.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015501
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