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題 名 | Incidences and Ecological Correlates of Dioecious Angiosperms in Taiwan and Its Outlying Orchid Island=臺灣與蘭嶼原生被子植物雌雄異株生殖系統與生活型關係之初探 |
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作 者 | 曾妤馨; 謝長富; 胡哲明; | 書刊名 | Botanical Studies |
卷 期 | 49:3 2008.07[民97.07] |
頁 次 | 頁261-276 |
分類號 | 373.15 |
關鍵詞 | 雌雄異株植物; 植物相; 蘭嶼; 生殖系統; 臺灣; Dioecy; Flora; Orchid island; Sexual system; Taiwan; |
語 文 | 英文(English) |
中文摘要 | 本研究整理3052種臺灣和689種蘭嶼原生被子植物之生殖系統,特別是雌雄異株型,對其與生活型的關聯進行討論。結果發現臺灣本島大部份的被子植物都是兩性花(74.4%, N=2272),其次為雌雄同株異花(11.2%, N=341),雌雄異株(7.9%, N=240),以及雜性花(6.5%, N=199)。不論是臺灣本島(7.9%)或是蘭嶼(11.9%)的雌雄異株植物,比例都高於世界平均值,但低於大部份的熱帶海洋性島嶼。臺灣和蘭嶼的雌雄異株植物都顯示和木本生活型有顯著相關,而在喬木和藤本中所佔的比例都相當的高。在臺灣本島1,005種木本被子植物中,有175種為雌雄異株植物(17.4%),而在2,047種草本植物中,則僅有65種(3.2%)為雌雄異株。雌雄異株植物的比例也隨著海拔升高而遞減。另外本研究在檢視了六個森林樣區中之所有原生被子植物資料,發現其中雌雄異株植物的比例有相當的變異,從林口紅土臺地次生林的14.1%,到南仁山熱帶森林的23.9%不等,後者甚至為目前所有發表樣區資料中雌雄異株比例最高的地區。 |
英文摘要 | Sexual systems, particularly dioecy, and the habit correlations were examined for 3052 native angiosperms in Taiwan and 689 species from its outlying Orchid Island, and compared among different vegetation types. The majority of angiosperms in Taiwan are hermaphrodites (74.4%, N = 2272), followed by monoecious taxa (11.2%, N =341), and then dioecious taxa (7.9%, N = 240) and polygamous taxa (6.5%, N = 199). The incidence of dioecy in Taiwan (7.9%) and Orchid Island (11.9%, N =82) exceeded world averages, but was lower than that of most tropical oceanic islands. Dioecy in Taiwan and Orchid Island is strongly associated with woodiness, and is over represented in tress and climbers, but not in shrubs. In woody taxa, 175 of 1,005 (17.4%) taxa are dioecious while only 65 of 2,047 (3.2%) herbaceous taxa are dioecious in Taiwan. The percentages of dioecy decrease with increasing altitude in Taiwan. The percentages of dioecy varied among the six selected vegetation types in Taiwan, from 14.1% in the Linkou Laterite Terrace secondary forest to 23.9% in the Nanjenshan plot, the highest percentage ever found in a forest plot. |
本系統中英文摘要資訊取自各篇刊載內容。