What's more, with the silting up of rivers and irrigation ditches and the large-scale use of pesticides, exotics, such as the golden apple snail or the common water hyacinth, have invaded and damaged the living environment of Taiwan's native water plants, causing a great variety of water plants to quickly disappear. Today many of these plants facing extinction can only be found in manmade ponds created as ecological refuges.
此外，河溝的水泥化、殺草劑大量使用、外來生物如福壽螺和布袋蓮等的入侵，都嚴重威脅台灣原生種水生植物的生存環境，讓原本多采多姿的水生植物樣貌快速消失，如今許多瀕危植物只能在人工保育的生態池中才能窺其芳蹤。