Tourist vehicles as vectors of weed seeds in Kakadu National Park, Northern Australia

aquatic weeds cenchrus ciliaris ecologia ecologia vegetal ecologie ecology economia economics economie encuestas escarda graine hyptis hyptis suaveolens malezas mauvaise herbe mauvaise herbe aquatique mimosa mimosa pigra national parks parc national parques nacionales pennisetum plant ecology poaceae salvinia molesta seed dispersal seeds semilla sida surveys tourism tourisme tridax procumbens turismo vehicles vehicule weed control weeds