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頁籤選單縮合
題 名 | Biogeographical Affinities of the Flora of Southeastern Yunnan, China=雲南東南部熱帶植物區系的生物地理親緣 |
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作 者 | 朱華; 閆麗春; | 書刊名 | Botanical Studies |
卷 期 | 50:4 2009.10[民98.10] |
頁 次 | 頁467-475 |
分類號 | 371.9235 |
關鍵詞 | 生物地理親緣; 植物區系; 雲南東南部; Biogeographical affinities; Flora; Southeastern Yunnan; |
語 文 | 英文(English) |
中文摘要 | 雲南東南部熱帶地區記錄有種子植物186 科,1,357 屬,4,996 種及變種。通過分析其植物區系組成和地理成分, 本文研究了該植物區系的特徵及其生物地理親緣。該植物區系熱帶成分占總屬數的 68.83%,其中,又以熱帶亞洲分佈屬比例最高,占總屬數的27.34%。在與周邊雲南南部(西雙版納)、廣西西南部及越南植物區系的比較上,雲南東南部的熱帶植物區系與它們在科、屬水準上具有高的類似性,它們之間科的類似性在89%,屬的類似性在76% 以上。它們隸屬于同一植物區系分區單元,在植物區系分區中為熱帶亞洲或印度— 馬來西亞植物區系的北緣部分。由於位於東南亞熱帶北緣山地及其地質歷史原因,雲南東南部的熱帶植物區系中嚴格熱帶分佈的成分不多,仍以邊緣熱帶成分為主,並有相對豐富的亞熱帶-溫帶科如木蘭科、山茶科、山茱萸科、山礬科、忍冬科、冬青科等以及一些東亞和喜馬拉雅特徵科, 如岩梅科、十齒花科、領春木科、茶藨子科和鞘柄木科,顯示了它與東亞溫帶植物區系也有較多聯繫。與雲南南部、廣西西南部及越南熱帶植物區系比較,雲南東南部植物區系中熱帶地理成分的比例相對較低,並且與廣西西南部的聯繫強于雲南南部。 |
英文摘要 | Southeastern Yunnan has 4,996 species and varieties of 1,357 genera and 186 families of native seed plants recorded. Floristic attributes and biogeographical affinities of the flora were studied by analyzing its floristic composition and geographical elements. Tropical genera comprise a majority (68.83%) of the flora and those of tropical Asian distribution contribute to 27.34% of the total genera. The flora of southeastern Yunnan is similar in composition to the floras of southern Yunnan, southwestern Guangxi and Vietnam. They have similarities of more than 89% at the family level and more than 76% at the generic level. The flora of southeastern Yunnan, with the compared floras together, belongs to the same floristic unit and is suggested to be part of Indo-Malaysian flora at northern margin of tropical Asia. However, the taxa of strictly tropical distribution are still underrepresented in the flora of southeastern Yunnan compared to Indo-Malaysian flora, and the families of mainly subtropical to temperate distribution, such as Magnoliaceae, Theaceae, Cornaceae, Styracaceae, Symplocaceae, Aquifoliaceae and Caprifoliaceae, are well represented in the flora. Some characteristic families of temperate East Asia, such as Diapensiaceae, Dipentodontaceae, Eupteleaceae, Grossulariaceae and Toricelliaceae are also present in the flora of southeastern Yunnan. These suggest that the flora of southeastern Yunnan is related to Eastern Asian flora more than other compared floras. It is also revealed that the flora of southeastern Yunnan is biogeographically closer to the flora of southwestern Guangxi than that of southern Yunnan. |
本系統中英文摘要資訊取自各篇刊載內容。