Son cada vez más numerosas las especies foráneas que son liberadas, intencionadamente o no, en nuestras aguas continentales e incluyen a una amplia gama de organismos (helechos, fanerógamas acuáticas, crustáceos, moluscos, ...

Fluvial ecosystems are highly modified by human activity and the species inhabiting them are more imperiled than their aerial or oceanic counterparts. In addition, freshwater biodiversity per surface unit is higher than ...