More than US$21 billion is spent annually on biodiversity conservation. Despite their importance for preventing or slowing extinctions and preserving biodiversity, conservation interventions are rarely assessed systematically for their global impact. Islands house a disproportionately higher amount of biodiversity compared with mainlands, much of which is highly threatened with extinction. Indeed, island species make up nearly two-thirds of recent extinctions. Islands therefore are critical targets of conservation.

This is a summary of New Caledonia's Strategy for Invasive Alien Species that threaten natural ecosystems which was endorsed by the governing board of the Conservatoire d'espaces naturels (CEN) at the end of 2016. This summary was produced to raise awareness amongst New Calendonians and visitors of the priority actions that have been developed at the territory level and the urgent need for cooperative action to address this major threat to the country.

Water lettuce is a free floating aquatic plant in rosettes of green leaves, rosettes occuring singly or connected to others by short stolons whose origins are uncertain. It forms large, dense floating mats. The plant can adapt to life in ponds, dams, lakes and quiet areas of rivers and streams, but cannot withstand salt water. Still continue with observation whether it is to survive in winter.