Influence of environmental conditions on the Great Reed invasion

Abstract

Commonly referred to as the Great Reed or Giant Reed, and locally as Qasba l-Kbira, Arundo donax has become a familiar sight in the Maltese islands. This resilient plant thrives in riparian habitats and has become an invasive species in many regions of the world with Mediterranean-type climates. Usually found in dense stands along stream beds, it typically grows to a height of three to six metres and can replace all other plant species for stretches of one kilometre or more. It has become dominant in many sensitive sites throughout Malta, which are already under threat due to human influence. Negative impacts resulting from this invasion include increased fire risk, removal of nutrients, the uptake of substantial quantities of water and reduced species richness and diversity in colonised habitats.