If I'm not mistaken...
Melaleuca trees are fire resistant, and it exploits fire to suppress competitors so it can take over an ecosystem. You can still use fire to fight it, but you have to know what you're doing, and follow up after a burn.
The plant was introduced into Florida by developers about a century because of its ability to dry up wetlands.
You see, back then, wetlands were considered bad for business. Now, we need them to provide water for our cities.
http://www.columbia.edu/itc/cerc/danoff-burg/invasion_bio/inv_spp_summ/Melaleuca_quinquenervia.html