Influence of aboveground removal on an invasive perennial herb Rudbeckia laciniata L. (Compositae) in June : difference in belowground size(Scientific Evaluations)

We examined the response to the aboveground removal of a noxious invasive plant Rudbeckia laciniata L. (Compositae), conducted in June. The belowground size and proportion of flowering individuals were compared in a plot subject to aboveground removal and in an undisturbed plot in Hakone, Central Ja...

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Bibliographic Details
Published inJapanese Journal of Conservation Ecology Vol. 12; no. 2; pp. 151 - 155
Main Authors Osawa, Takeshi, Akasaka, Munemitsu
Format Journal Article
LanguageEnglish
Japanese
Published The Ecological Society of Japan 01.11.2007
Subjects
Alien plant control
Ecosystem management
Hakone Japan
Harvest
Resource allocation
Rudbeckia laciniata
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Summary:We examined the response to the aboveground removal of a noxious invasive plant Rudbeckia laciniata L. (Compositae), conducted in June. The belowground size and proportion of flowering individuals were compared in a plot subject to aboveground removal and in an undisturbed plot in Hakone, Central Japan. The relationship between the number of flowers and belowground size was examined in another undisturbed plot. Although aboveground removal significantly suppressed the flowering rate, the R. laciniata in the aboveground removal plot had a larger belowground size than in the undisturbed plot. The number of flowers increased with the belowground size in the undisturbed plot. Our result indicates that annual aboveground removal conducted in June is not efficient for eliminating R. laciniata; indeed, it may induce mass flowering and seed production when the aboveground removal ceases.
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ISSN:1342-4327
2424-1431
DOI:10.18960/hozen.12.2_151