Consequently, many different factors, including the building and development of harbors, sea dykes, fishponds, sand and gravel extraction, the lining of irrigation channels with cement, and farmers 'excessive use of herbicides and burning stubble, have caused sharp reductions in Hygrophila pogonocalyx habitat.
也因為如此，包括港灣及海堤的開發興建、漁塭和砂石場的開挖、溝渠整治與水泥化、農民過度使用殺草劑與焚燒整地，都使得大安水蓑衣的生育地銳減。