ISSN:
1573-5052
Schlagwort(e):
Allelopathy
;
Bamboolands
;
Buried-seed population
;
Degree of succession
;
Denudation experiments
;
Distribution pattern
;
Grasslands
;
Life-forms
;
Rate of Succession
;
Weed communities
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00726883
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