Molecular investigations have raised concerns about the ecological risks of green tides caused by alien Ulva species in new habitats.The green tide-forming species U.californica Wille was generally considered to be na...Molecular investigations have raised concerns about the ecological risks of green tides caused by alien Ulva species in new habitats.The green tide-forming species U.californica Wille was generally considered to be native to North America,but new records have been widely reported in Europe,Asia,and Oceania in recent decades,indicating a strong dispersal capacity of the species.In this study,the first record of U.californica on the coastline of China's Mainland was reported,following a combined identification with multi-molecular markers and morphological characterization.It was shown that this species has a discontinuous distribution pattern along the coast of China's Mainland,with northern populations in the Yellow Sea and southern populations in the East China Sea and South China Sea.According to results of examination for life cycles and identification with mating type(MT)genetic markers,it was indicated that all U.californica samples were male gametophytes,and reproduced themselves through parthenogenesis solely.Combined with the fact that southern and northern populations are highly genetically identical,here we believed that U.californica was a recent alien species to China's Mainland with a rapid local spread.This finding provided evidences that the ability to reproduce in a variety of ways may play an important role in the spread of Ulva species,as well as essential basic data for marine risk management of green tides in China.In addition,according to the phylogeographic analysis,the possible geographical origin and global dispersal routes of U.californica were also proposed.展开更多
木瓜秀粉蚧Paracoccus marginatus Williams and Granara de Willink是农作物和观赏植物的重要害虫,原产于墨西哥和中美洲,自1955年首次发现于墨西哥以来,已传播扩散至34个国家和地区。我国以前仅记录于台湾,本文从云南西双版纳佛肚树...木瓜秀粉蚧Paracoccus marginatus Williams and Granara de Willink是农作物和观赏植物的重要害虫,原产于墨西哥和中美洲,自1955年首次发现于墨西哥以来,已传播扩散至34个国家和地区。我国以前仅记录于台湾,本文从云南西双版纳佛肚树上采得,为该虫在大陆的首次发现。文中对其鉴别特征、寄主植物、地理分布、生物学和经济重要性进行了介绍。展开更多
基金Supported by the Science&Technology Basic Resources Investigation Program of China(No.2018FY100205)the National Natural Science Foundation of China(No.41776153)+3 种基金the Key Deployment Project of Centre for Ocean Mega-Research of ScienceChinese Academy of Science(No.COMS2019Q05)the Key R&D Program of Shandong Province(No.2019GSF107012)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA23050302)。
文摘Molecular investigations have raised concerns about the ecological risks of green tides caused by alien Ulva species in new habitats.The green tide-forming species U.californica Wille was generally considered to be native to North America,but new records have been widely reported in Europe,Asia,and Oceania in recent decades,indicating a strong dispersal capacity of the species.In this study,the first record of U.californica on the coastline of China's Mainland was reported,following a combined identification with multi-molecular markers and morphological characterization.It was shown that this species has a discontinuous distribution pattern along the coast of China's Mainland,with northern populations in the Yellow Sea and southern populations in the East China Sea and South China Sea.According to results of examination for life cycles and identification with mating type(MT)genetic markers,it was indicated that all U.californica samples were male gametophytes,and reproduced themselves through parthenogenesis solely.Combined with the fact that southern and northern populations are highly genetically identical,here we believed that U.californica was a recent alien species to China's Mainland with a rapid local spread.This finding provided evidences that the ability to reproduce in a variety of ways may play an important role in the spread of Ulva species,as well as essential basic data for marine risk management of green tides in China.In addition,according to the phylogeographic analysis,the possible geographical origin and global dispersal routes of U.californica were also proposed.
文摘木瓜秀粉蚧Paracoccus marginatus Williams and Granara de Willink是农作物和观赏植物的重要害虫,原产于墨西哥和中美洲,自1955年首次发现于墨西哥以来,已传播扩散至34个国家和地区。我国以前仅记录于台湾,本文从云南西双版纳佛肚树上采得,为该虫在大陆的首次发现。文中对其鉴别特征、寄主植物、地理分布、生物学和经济重要性进行了介绍。
