Occurrence and germination of buried seeds of 6 alien species including specified invasive alien species (plants) in rivers

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  • 河川における特定外来生物（植物）等 6種の埋土種子分布及び発芽特性
  • カセン ニ オケル トクテイ ガイライ セイブツ(ショクブツ)トウ 6シュ ノ マイド シュシ ブンプ オヨビ ハツガ トクセイ

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We conducted a survey on vegetation and a sampling of topsoils on the riverbed of growing sites of 5 species (Sicyos angulatus L., Ambrosia trifida L., Coreopsis lanceolate L., Rudbeckia laciniata L. and Eragrostis curvula (Schrad.) Nees) in nationwide six rivers. After that, we performed a germination experiment using the sampled topsoils. We also analyzed Veronica anagallis-aquatica L. that germinated in the experiment. As a result, germination was obserbed in the second year of the experiment, with five species except Rudbeckia laciniata L., suggesting the formation of persistent soil seed banks.

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