in addition, 11 invasive plants are recorded without baneful quarantine species.Spread of amphibian and aridly plants is caused by the scarcity of water resources in Beijing;

• 共记录入侵植物11种，未见有害检疫种.；北京湿地水资源缺乏导致植物类群变化及中生和旱生植物扩散；