AN EXPERIMENTAL STUDY ON THE DEVELOPMENT OF HERBACEOUS COMMUNITIES IN SUGADAIRA, CENTRAL JAPAN

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  • 菅平における草本群落形成過程に関する実験
  • 菅平における草本群落形成過程に関する実験〔英文〕
  • スガダイラ ニ オケル ソウホン グンラク ケイセイ カテイ ニ カンスル ジ

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Abstract

TAKAHASHI Yayoi (1-22-23,Nishiki-cho, Tachikawa-shi, Tokyo) & HAYASHI Ichiroku (Sugadaira Montane Research Center, The University of Tsukuba). 1978. An experimental study on the development of berbaceous communities in Sugadaira, Central Japan. Jap. J. Ecol. 28 : 215-230. An observation on the establishment and replacement of species was made in stands of seral stages. The pioneer stage of secondary succession was dominated by Echinochloa crus-galli var. crus-galli and Digitaria violascens whose seeds are heavier than those of othoer species with seeds buried in the soil of the initial stand. These species, however, were replaced by Rumex acetosella, Erigeron canadensis, E, annuus and Artemisia princeps in the second year, even though the soil of this stand contained many buried seeds of the dominants of the pioneer stage. The standing crop and net production were 621.1 g/m^2 and 681.3 g/m^2 year in initial stand and 682.4g/m^2 and 630.0 g/m^2/year in the second-year stand, respectively. The energy efficiency in the pioneer and second-year stands was 1.02 and 0.96 percent, respectively. In the inital stand, 57 percent of assimilated matter was distributed to the above ground parts and 25 percent of it was invested in seeds. In the second-year stand, investment of matter to the above ground parts was 46 percent of total assimilated matter, of which 6 percent was devoted to the seeds.

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