生態環境研究
Online ISSN : 2433-4626
Print ISSN : 1340-4776
20 巻, 1 号
選択された号の論文の4件中1~4を表示しています
原著論文
  • 中西 弘樹
    原稿種別: 研究論文
    2013 年 20 巻 1 号 p. 1-7
    発行日: 2013/12/30
    公開日: 2021/07/20
    ジャーナル フリー

    Distribution expansion of several tropical Convolvulaceae species by ocean current dispersal were observed on the coast of Kyushu, Japan. Except Ipomoea pes-caprae which have been often reported, seedlings or adult plants of eight species from sea-borne seeds were newly found on or near the drift zone of many beaches; I. alba, I. cairica, I. fimbriosepala, I. stolonifera, Merremia peltata, Operculina turpethum and Stictocardia tiliifolia. These localities are beyond each producing area where species produce seeds and complete the life cycle. These plants from sea-borne seeds were found on beaches where I. pes-caprae and tropical drift fruits and seeds were also found. Distribution expansion of these tropical Convolvulaceae species is a good indicator of global warming.

  • 村上 雄秀, 宮脇 昭
    原稿種別: 研究論文
    2013 年 20 巻 1 号 p. 9-23
    発行日: 2013/12/30
    公開日: 2021/07/20
    ジャーナル フリー

    For phytosociological study on the mantle community of Japan, a community system has been published by murakami (2004). But it has not been clear for most mantle communities in the tropical Southeast Asia. Reports on the mantle communities of the tropical mangrove forest area in Thailand (miyawaki et al., 1985) are valuable in that sense. However, the species composition tables of that report have not been published. The purpose of this report is to publish the species composition tables of mantle communities in the mangrove forest area of miyawaki et al. (1985). We also re-recorded, in English, the original description written in Japanese. Mantle communities in the mangrove forest area in Thailand were classified into two alliances. Finlaysonio-Derrilion trifoliatae (including two associations) was distributed in the front part of the mangrove forest area, and Clerodendro-Derrilion trifoliatae (including two associations and one community) was distributed in the rear part. The distribution patterns of both alliances nearly corresponded to two orders (nomen nudum) of mangroves forests.

  • -太平洋側におけるブナ林の再生を目指して-
    林 寿則, 鈴木 伸一, 矢ヶ崎 朋樹
    原稿種別: 研究論文
    2013 年 20 巻 1 号 p. 25-35
    発行日: 2013/12/30
    公開日: 2021/07/20
    ジャーナル フリー

    The growth behavior of fifteen broad-leaved tree seedlings was investigated during 11 years in order to convert a Chamaecyparis obtusa Seib. et Zucc. plantation into beech: Fagus crenata Bl. forests in the Hakone region on the Pacific Ocean side of Japan. The survival rate of all planted seedlings is 66.9%, and for Fagus crenata supplementary planting, 37.7%. The average height of Prunus jamasakura Seib., Quercus mongolica Fischer var. grosseserrata Miq., Fagus crenata was 842cm, 666.3cm, 205.8-275.0cm after planting 10-11 years, respectively. The stratification of planted trees formed almost three layers depending on the difference of primary growth speed. Although several species of seedlings were planted which had a differential growth behavior, Fagus crenata showed approximately equivalent or slightly lower average height than in previous studies. As concerns improvement of the forest structure, it expected to grow more Fagus crenata to promote thinning of the planted trees in the upper layer.

  • 目黒 伸一
    原稿種別: 研究論文
    2013 年 20 巻 1 号 p. 37-53
    発行日: 2013/12/30
    公開日: 2021/07/20
    ジャーナル フリー

    A phytosociological survey was conducted to investigate afromontane forests mainly in Kenya. Evergreen broadleaf forest should occur as potential natural vegetation more than 1400m from sea level in Kenya. The main species were Diospyros abyssinica, Drypetes gerrardii, Vepris simplicifolia, Olea capensis subsp. hochstetteri, O. europea subsp. africana, Diospyros abyssinica, Ekerbegia capensis, Cionanthus battiscombei, and Vepris nobilis. Savanna vegetation that appeared more than 1,400m above sea level is thought to be a secondary forest of evergreen broadleaf forest. Most dry forest with Croton megalocarpus was considered as secondary vegetation. Dry forest should occur in a narrower zone than actual vegetation between the evergreen broad leaf forest and savanna as potential natural vegetation. A Prunus africana community was located at higher altitude than other broad leaf tall trees communities as potential natural vegetation. A Arundinaria alpina community and Hagenia abyssinica community were thought to be substitute vegetation of the P. africana community. A Hagenia abyssinica community is expected to appear subsequently after the Arundinaria alpina community. Juniperus procera established a natural forest on a highland cliff. Maesa lanceolata formed typical secondary shrubs. Basically Juniperus procera, Nuxia congesta, Maesa lanceolata and Clerodendrum trichotomum were considered as light demander species.

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