THE ASIAN CLAM IN PORTUGAL
According to the database of Delivering Alien Invasive Species Inventories for Europe (DAISIE) species inventories for Europe include 12,122 exotic species, 28% of which can be found in Portugal, the vast majority of them terrestrial.
Not all of these species are invasive, an estimated 15% are potentially dangerous to European biodiversity and the annual costs caused by invasive species in the European Union are at least € 12 billion.
The Asian clam is native to Southeast Asia and currently colonizes several ecosystems in America and Europe. In Portugal, it can be found in all hydrographic regions with the exception of the Cávado, Ave and Leca rivers
It poses a serious threat to biodiversity and the role of ecosystems, with consequences on trophic flows, biogeochemical cycles and the diversity and abundance of native bivalves
In addition to adverse effects on ecosystems, this pest also causes significant problems in the industrial context, including blockage and corrosion of pipes, water collection systems and other equipment, such as heat exchangers, pumps and valves
Economic / ecological impacts
Bivalve invaders can cause significant ecological changes in the invaded areas. They act as engineers of the ecosystem, modifying and creating habitats.
Impact on industries and other contexts
More information on this topic can be obtained at: