The Tanaka-Kaiyong line - An important floristic line for the study of the flora of East Asia
The Tanaka-Kaiyong line - An important floristic line for the study of the flora of East Asia
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DOI：
10.2307/2992033
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发表时间：
1997-01-01
影响因子：
1.9
通讯作者：
Jie, L
中科院分区：
文献类型：
--
作者：
Li, XW;Jie, L
“田中-开庸线”是东亚两个主动脉亚国的分界线，东起中日亚国，西至中国-喜马拉雅亚国。它位于中国的四川省和云南省。它是由云南的“柑橘分布田中线”和四川的“兰花分布开永线”组成的，在滇西北和川西南的交界处几乎连成一体。改变某些属的分布格局后，我们确信它的存在。田中-开永线不仅对东亚植物界的划分和中国主动脉的划分具有重要意义，而且对一些重要种的分离和隔离研究也具有重要意义。此外，三个重要的主动脉区，横断山区，华中区和滇黔桂区，这是著名的物种丰富，特有和高物种形成，位于这条线附近。与中国-喜马拉雅属相比，中国-日本属被田中-开永线分隔得更彻底，这可能与它们的区系形成背景和起源时代不同有关。此外，田中-海永线两侧的中国特有属的生物多样性中心（或多度中心）似乎是不同的。界线西侧的中心以新特有种为主，东侧的中心以古特有种为主。这种差异可能是由中国的地质地貌格局和大尺度气候条件造成的。喜马拉雅山脉的隆升导致横断山和云南高原的形成，极大地影响了末次亚洲西部的主动脉性质，因此，导致我们定义田中-开永线的植物区系分布可能是从那时起出现的。
The "Tanaka-Kaiyong Line" is a line separating two Aoristic subkingdoms of East Asia, the Sino-Japanese to the east and the Sino-Himalayan to the west. It lies in the provinces of Sichuan and Yunnan in China. It is comprised of the "Tanaka Line of Citrus Distribution" in Yunnan province and the "Kaiyong Line of Orchid Distribution" in Sichuan province, which nearly connect at the border of NW Yunnan and SW Sichuan. Alter a sun ey of the distribution patterns of some genera, we are sure that it exists. The Tanaka-Kaiyong Line is significant not only for the subdivision of the East Asia Kingdom and the Aoristic regionalization of China, but also for the separation of some critical species and the study of vicariance. Moreover, three important Aoristic regions, the Hengduan Mountain region, Central China region, and Dian-Qian-Gui region, which are noted for species abundance, endemism, and high speciation, are situated near this Line. Compared with Sino-Himalayan genera, the Sino-Japanese are more completely separated by the Tanaka-Kaiyong Line, possibly due to their different florogenetic backgrounds and different times of origin. Additionally it seems that the centers of biodiversity (or abundance centers) of Chinese endemic genera on each side of the Tanaka-Kaiyong Line are different. The centers on the west side of the Line are mainly neoendemic, but those on the east are mainly paleoendemic. This difference may be caused by geological-geomorphological patterns and the large-scale climatic conditions in China. The formation of Hengduan Mountain and Yunnan Plateau, which was induced by the uplifting of the Himalayas, greatly affected the Aoristic nature of western Last Asia and, therefore, the floristic distributions that led us to define the Tanaka-Kaiyong Line have probably arisen since that time.