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  • 1
    Electronic Resource
    Electronic Resource
    Field-capacity water extracts from serpentine soils (1981)
    [s.l.] : Nature Publishing Group
    Nature 294 (1981), S. 245-246 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The soil solutions were extracted by centrifuging at 12,000g soil samples which had been maintained for up to 3 days at field capacity (moisture content after 24 h drainage). The solutions were analysed by standard atomic absorption techniques8 for metals, the phenol disulphonic method8 (with ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/294245a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The effects of chrysomelid beetle grazing and plant competition on the growth of Rumex obtusifolius (1986)
    Springer
    Oecologia 70 (1986), S. 452-456 
    Details
    ISSN: 1432-1939
    Keywords: Grazing ; Plant competition ; Growth ; Gastrophysa ; Rumex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The interaction between grazing by Gastrophysa viridula and interspecific plant competition was investigated for Rumex obtusifolius growing in the field. During an eight-month growing season non-competing R. obtusifolius grew larger than competing plants although herbivore loads (beetle productivity per unit leaf area) were similar for competing and non-competing plants. However, grazing significantly reduced the growth of R. obtusifolius only in competing plants thus demonstrating a synergism between plant competition and invertebrate herbivory. The relevance of these findings for the distribution of plant species is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379511
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of insect damage on photosynthesis, transpiration and SO2 uptake by sycamore (1989)
    Springer
    Oecologia 80 (1989), S. 136-139 
    Details
    ISSN: 1432-1939
    Keywords: Insect damage ; Water loss ; Photosynthesis ; SO2 uptake ; Acer pseudoplatanus ; Leafhopper
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This study investigated the effects of damage by the typhlocybine leafhopperOssiannilssonola callosa on the physiology of sycamore seedlings. Feeding by 20 adult leafhoppers for four days produced stippling damage of about 10% of total leaf area. Measurements immediately following removal of the leafhoppers showed a 22% decrease in photosynthesis, 25% decrease in daytime rate of water loss and a 34% increase in night-time rate of water loss, probably due to impaired stomatal function. Sixteen days later control of stomatal function was largely regained with rates of photosynthesis similar to the control plants and slightly higher rates of water loss (6.6% day, 18.0% night) attributable to the still-open feeding punctures of the leafhoppers. Daytime SO2 uptake was similar in damaged and control plants but at night the damaged plants showed a 35% increase in uptake. The hypothesis that leafhopper damage is responsible for this increase is supported by a positive relationship between uptake rate and area of leaf stippled. The physiological effects of leafhopper feeding are greater than the visible damage suggests and the effects are particularly serious when the damage is fresh. Increased rate of air pollutant entry to damaged plants is also a problem, again most marked when damage is fresh.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00789943
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    Paper (German National Licenses)
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