Population Dynamics of Poa annua L. in a Golf Course

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  • ゴルフ場におけるスズメノカタビラ(Poa anuua L.)の個体群動態
  • Population Dynamics of Poa annua L.in a

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Abstract

The populations of Poa annua L. were monitored on green, fairway and rough in a golf course in Kyoto for a year to characterize the selection pressures on this species. Populations in the green were irregularly recruited during a whole growing period (October to June). They suffered from severe mortality (over 80%) caused by hand weeding in March and April. At the weeding time, the matured large plants were mainly removed by hand, because their panicles stood out in the green. However, over 50% of the green populations produced seeds before that time. Their irregular recruitments and quick maturation seem to be adaptive characteristics to mortal risks caused by hand weeding. In contrast, plants in the fairway and rough were recruited uniformly by December. Most individuals of those populations were killed by herbicides before their maturity.

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