Proliferation of Caulerpa racemosa in coastal ecosystems of Algeria: current situation and knowledge.
To identify any study on C. racemosa in Algeria, several databases were consulted on the internet using different keywords related to the topic (invasive algae, macrophytes, Caulerpa, Algeria). The set of works consulted consisted of three published research articles, three papers in international scientific events, two Master's dissertations and a doctoral thesis. Only the results of B. BACHIR BOUIDJRA et al. (2010-a, 2010-b) appear to be complete since they have succeeded in determining the surface and the coastline area achieved by this invasive alga, respectively, 10500 m2 and 700 m in Salamandre and 4000 m2 and 200 m in Stidia. Other authors did not mention of its presence and the nature of the substrate it occupies. It is concluded that studies on biological invasions in the marine ecosystem in Algeria and especially by C. racemosa strains are rare and fragmented compared to other countries of the northern Mediterranean shore. Few studies to date have been able to clarify its extension on the Algerian coast. C. racemosa is mainly located in the centre of the Algerian coast region where it covers a wide variety of substrates ranging from mud to rock. It was discovered at different depths during the course of phytosociological surveys followed by macrophyte stands in different coastal areas of Algeria.