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  • 1
    Electronic Resource
    Electronic Resource
    Studies of the grassland vegetation in the kawatabi special research area of the Japanese IBP (1973)
    Springer
    Plant ecology 28 (1973), S. 41-56 
    Details
    ISSN: 1573-5052
    Keywords: Computertabulation ; Phytosociology ; Miscanthus sinensis ; Grassland ; Japan-IBP
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Die Arbeit berichtet über die Analyse einer pflanzensoziologischen Tabelle mit Hilfe eines Komputerprogrammes. Als Rohtabelle wurden die Aufnahmen von der japanischen IBP Graslandstation in Kawatabi verwendet. Die übliche Handsortierung der Tabelle wird mit der Komputersortierung verglichen. Dieser Vergleich war Teil eines Testes für die Brauchbarkeit einer vonLieth & Moore entwickelten Komputersimulation der klassischen pflanzensoziologischen Tabellierungsmethode. Die Tabellen 2–6 und Abb. 2 demonstrieren Grenzen und Brauchbarkeit der beschriebenen Komputersortierung. Die Möglichkeit der Eingliederung pflanzensoziologischer Tabellen als Matritzen in ökologische Komputermodelle anderer Art wird erörtert. 2. Die Vegetation der J-IBP Grasland-Station wird beschrieben und deren Beziehungen zu einigen Umweltsfaktoren diskutiert (Tabellen 2 und 5, Abb. 1). Die Vegetationsdecke besteht im Wesentlichen aus verschiedenenMiscanthus sinensis-Grasland Typen. Einige Bewirtschaftungseinflüsse auf die Vegetationsdecke werden behandelt. Die oberirdische Primärproduktivität des Graslandes variiert in den Grenzen von 300 g bis 1500 g (von 400 g bis 600 g unter gewöhnlichen umständen) Trockensubstanz je m2 und Jahr.
    Notes: Summary 1. The paper demonstrates the utilization of a computerized vegetation analysis on the field data gathered at the Japanese IBP Grassland Site. Hand- and computer sorting procedures are compared and discussed. This part of the paper was a test of the usefulness of the computer simulation of the standard sorting procedures of phytosociological work. Tables 2–6 and Figure 2 demonstrate the usefulness as well as the limitations of the computer analysis. The possibility of incorporating phytosociological tables as matrices into computerized ecosystems models is suggested. 2. The vegetation of the J-IBP Grassland Site is described and preliminary evaluations made with regard to environmental parameters (Table 2 and 5, Figure 1). Some management influences on theMiscanthus grassland are discussed. The primary above-ground productivity ranges from 300 to 1500 g (usually 400 to 600 g) dry matter per m2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02386213
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Experimental studies on the early stages of secondary succession (1982)
    Springer
    Plant ecology 48 (1982), S. 141-149 
    Details
    ISSN: 1573-5052
    Keywords: Allelopathy ; Bamboolands ; Buried-seed population ; Degree of succession ; Denudation experiments ; Distribution pattern ; Grasslands ; Life-forms ; Rate of Succession ; Weed communities
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To study secondary successional sequences and mechanisms, denudation experiments were conducted in Central Japan with the removal of dominants, laying burned soil on the surface, and turning over the top- and subsoil. The early stages of secondary succession were predictable as to species and life-form composition. The biomass — the degree of succession (DS) relationship and the DS-isopleth showed phasic changes within a seral stage. The rate of succession (RS) was also calculated. In the establishment of weed communities with crops, the critical time for weeding, the allowable limit of weeds, etc. were found in relation to the distribution pattern, adaptive strategy of species, interspecific and intraspecific density regulations. In seasonal denudation experiments, the month of denudation affected the regular phenological pattern of weedy species, although normal replacement of summer annuals by winter annuals was usual. The population dynamics of buried-seeds in the soil, the adaptive strategies of the dominants and the role of allelopathy were discussed as the main forces of secondary succession in its early stages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00726883
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    Paper (German National Licenses)
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