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  • 1
    Electronic Resource
    Electronic Resource
    Lead contamination in street dust in Hong Kong (1979)
    Springer
    Bulletin of environmental contamination and toxicology 21 (1979), S. 639-642 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Summary Lead levels were generally found to be high in road-side dust samples collected from different sites throughout the Island of Hong Kong during winter 1977–78. Considerable differences in the concentration of lead amongst these sites were detected but such differences bore no direct relationship to the traffic volumes of the sites from which the samples were collected. Different districts within the city varied widely in the mean concentration of lead in their road-side dust samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01685482
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of rain on lead levels in roadside vegetation in Hong Kong (1979)
    Springer
    Bulletin of environmental contamination and toxicology 23 (1979), S. 658-660 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01770021
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  • 3
    Electronic Resource
    Electronic Resource
    Potential use of a roadside fern (Pteris vittata) to biomonitor Pb and other aerial metal deposition (1985)
    Springer
    Bulletin of environmental contamination and toxicology 35 (1985), S. 430-438 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01636534
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  • 4
    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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  • 5
    Electronic Resource
    Electronic Resource
    Inorganic mineral nutrient level studies on Potamogeton pectinatus L. and Enteromorpha prolifera in Forfar Loch, Scotland (1979)
    Springer
    Hydrobiologia 62 (1979), S. 7-15 
    Details
    ISSN: 1573-5117
    Keywords: Inorganic mineral nutrient levels ; aquatic macrophytes ; Potamogeton ; Enteromorpha
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00012558
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  • 6
    Electronic Resource
    Electronic Resource
    Chemical composition studies on some aquatic macrophytes in three scottish lochs. II. Potassium, sodium, calcium, magnesium and iron (1979)
    Springer
    Hydrobiologia 64 (1979), S. 209-213 
    Details
    ISSN: 1573-5117
    Keywords: Chemical composition studies ; potassium ; sodium ; calcium ; magnesium ; iron ; freshwater macrophytes ; Scottish lochs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The potassium, sodium, calcium, magnesium and iron 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 and the results obtained were compared with similar studies in other areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00020521
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  • 7
    Electronic Resource
    Electronic Resource
    Mineral composition of Phragmites australis in Scottish lochs as related to eutrophication. I. Seasonal changes in organs (1981)
    Springer
    Hydrobiologia 85 (1981), S. 227-237 
    Details
    ISSN: 1573-5117
    Keywords: chemical composition ; eutrophication ; nitrogen ; phosphorus ; Phragmites australis ; Scottish lochs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Monthly levels of nitrogen, phosphorus, potassium, sodium, calcium, magnesium and iron in the organs (root, rhizome, stem, leaf and panicle) of Phragmites australis were determined from March to November, 1975 in Forfar Loch (polytrophic), Balgavies Loch (eutrophic) and Loch of the Lowes (mesotrophic), Scotland. Generally no consistent seasonal changes in the mineral levels were detected for the root, rhizome and panicle. For the stem and leaf, the levels of nitrogen, phosphorus, potassium, calcium and magnesium rose to a peak before declining for the rest of the season. Consistently higher levels of tissue nitrogen, phosphorus, potassium and calcium were found in the Forfar plants over those of Balgavies and Lowes, reflecting the very eutrophic condition in Forfar Loch. The mineral compositions in the reeds in the present study were compared with similar studies in other areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00017612
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  • 8
    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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  • 9
    Electronic Resource
    Electronic Resource
    Shoot development and production studies of phragmites Australis (Cav.) Trin. Ex Steudel in Scottish Lochs (1979)
    Springer
    Hydrobiologia 64 (1979), S. 215-222 
    Details
    ISSN: 1573-5117
    Keywords: Shoot development ; production ecology ; Phragmites australis ; Scottish lochs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Studies were made on the development and production of Phragmites australis (Cav.) Trin. ex Steudel (= Phragmites communis Trin.) stands from Forfar Loch-polytrophic, Balgavies Locheutrophic and Loch of the Lowes-mesotrophic. Differences were detected in the shoot height, shoot dry weight, standing crop biomass, leaf area index, crop growth rate and net efficiency of solar energy conversion among the three lochs. Such differences were partly due to the different nutrient levels of the three locations. The percentage ratio of leaf to shoot weight, leaf area ratio, relative growth rate and net assimilation rate for the reed stands in the three lochs were also calculated and were compared with values from other study areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00020522
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  • 10
    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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