Geographic Distribution Pattern and Dispersal Route of Urodela in China
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Lab of Insect Systematics and Evolutionary Biology,Central South University of Forestry and Technology

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    Abstract:

    Biogeographic maps of Urodela in China was drawn with DIVA-GIS7.5.0 software, and based on which, the distribution pattern and dispersal routes of Urodela were analyzed. The distribution pattern of Urodela in China can be concluded as the following (Fig. 3): 1. Hengduan Mountains, with the highest Urodela abundances, is the most probable center of origin; 2. Three secondary distribution centers, i.e. the areas between Dabie Mountains and Huaihe River, the areas between Nanling mountains and Pearl River, the areas between Wuyi mountains and Yangtze River; 3. Four third-class, small distribution centers: (1) Hainan island and Taiwan island, (2) areas between Changbai Mountains and Sanjiang Rivers, (3) areas between Qinling, Bashan mountainous region and Hanjiang, Weihe River watershed, and (4) the areas between Tianshan Mountains and Ili River valley. In detail, nine distribution pattern types were concluded from biogeographic maps: ① North Palaearctic distribution pattern (Fig. 2); ② Core distribution pattern (Fig. 3); ③ Northeast-Southwest distribution pattern (Fig. 4); ④ Between Yangtze-Pearl River watershed distribution pattern (Fig. 5); ⑤ South-East adjacent-sea distribution pattern (Fig. 6); ⑥ Hengduanshan mountainous area distribution pattern (Fig. 7); ⑦ Indo-East-Himalaya distribution pattern (Fig. 8); ⑧ Tianshan-Altai distribution pattern (Fig. 9); ⑨ East China-widespread distribution pattern (Fig. 10). The dispersal routes of Urodela in East Asia were the following: the species dispersed towards four directions respectively, i.e. dispersed northward, eastward, and southward and westward from the origin center along the rivers, and most of the Urodela species dispersed northward and eastward, though there were a few species migrated southward and westward. More specifically, the majority of the species dispersed northward were Hynobiidae, and the majority moved eastward were Salamandridae species. However, Cryptobranchidae, the widespread family of Urodela in eastern China, is probably the result of northward and eastward dispersal. The results also support the Sino-Japanese Realm hypothesis.

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YAO Ming-Can, NIE Hai-Yan. 2018. Geographic Distribution Pattern and Dispersal Route of Urodela in China. Chinese Journal of Zoology, 53(1): 1-16.

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History
  • Received:February 23,2017
  • Revised:January 14,2018
  • Adopted:December 28,2017
  • Online: January 25,2018
  • Published: