著者

山野 美鈴 芝池 博幸 井手 任

出版者

社団法人日本造園学会

雑誌

ランドスケープ研究 : 日本造園学会誌 : journal of the Japanese Institute of Landscape Architecture (ISSN:13408984)

巻号頁・発行日

vol.67, no.5, pp.587-590, 2004-03-31

被引用文献数

6 6

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Relationships between landscape structures and distribution patterns for dandelions (Taraxacum) were examined in Tsukuba city, Ibaraki Pref. By using molecular analysis, collected samples were discriminated as "native dandelions", "introduced dandelions", "tetraploid hybrids", "triploid hybrids", and "androgenesis hybrids". 32 sampling sites were grouped into five landscape types according to their similarities of land uses. The native dandelions mainly occurred at satoyama landscape. In contrast, hybrid dandelions (tetraploid hybrids) mainly occurred at urbanized areas and bare lands. Vegetation survey was also conducted at 20 sampling sites, and their components were summarized by DCA analysis. Positive correlation was found between the frequency of native dandelions and vegetation of forest floor and margin, and negative correlation between the frequency of tetraploid hybrids and vegetation of open habitats. Based on the results obtained, it was suggested that native dandelions tended to exist in the landscape containing more forest margin, whereas tetraploid hybrids in landscape containing more developed and/or vacant lands. Role of dandelions as environmental indicator species was discussed.

著者

山野 美鈴 芝池 博幸 井手 任

出版者

公益社団法人 日本造園学会

雑誌

ランドスケープ研究 (ISSN:13408984)

巻号頁・発行日

vol.67, no.5, pp.587-590, 2004 (Released:2005-12-12)

参考文献数

13

被引用文献数

6 6

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Relationships between landscape structures and distribution patterns for dandelions (Taraxacum) were examined in Tsukuba city, Ibaraki Pref. By using molecular analysis, collected samples were discriminated as "native dandelions", "introduced dandelions", "tetraploid hybrids", "triploid hybrids", and "androgenesis hybrids". 32 sampling sites were grouped into five landscape types according to their similarities of land uses. The native dandelions mainly occurred at satoyama landscape. In contrast, hybrid dandelions (tetraploid hybrids) mainly occurred at urbanized areas and bare lands. Vegetation survey was also conducted at 20 sampling sites, and their components were summarized by DCA analysis. Positive correlation was found between the frequency of native dandelions and vegetation of forest floor and margin, and negative correlation between the frequency of tetraploid hybrids and vegetation of open habitats. Based on the results obtained, it was suggested that native dandelions tended to exist in the landscape containing more forest margin, whereas tetraploid hybrids in landscape containing more developed and / or vacant lands. Role of dandelions as environmental indicator species was discussed.

著者

井手 任 守山 弘 原田 直國 横張 真

出版者

社団法人 日本造園学会

雑誌

造園雑誌 (ISSN:03877248)

巻号頁・発行日

vol.50, no.5, pp.161-166, 1986-03-31 (Released:2011-07-19)

参考文献数

15

被引用文献数

3 2

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ヒヨドり等の果実食鳥により種子を散布される植物の林外から林内への散布特性を把握するため, エンジュの散布量及び芽生え数の調査を実施した. 芽生え数は高木層にアカマツ・スキの樹冠か存在する部分の種子供給源側及ひピサカキの樹冠の下に特異的に多く, 高木層に樹冠の存在しない落葉広葉樹林下では林縁からの距離とは無関係に安定的に少なかった. これらの芽生え数の偏りは, 種子散布特性を反映したものであると考えられた