2021-04-08 10:35:48 GMT2021-04-08 18:35:48(Beijing Time) Xinhua English SYDNEY, April 8 (Xinhua) -- A study unveiled by Australia's Curtin University on Thursday found that introduced European honeybee may cause local bee population decline or extinction when they need to fight for limited nectar and pollen source. Published in the Biological Journal of the Linnean Society, the research found competition between the native bees and the introduced European honeybees could be particularly intense in residential gardens dominated by non-native flowers, and occurred when the bees shared the same flower preferences. The research, conducted for over two years in urban gardens and areas of native vegetation on the Swan Coastal Plain in Perth of Western Australia, also revealed a complex relationship between native and introduced bees.