A compiled checklist of seaweeds of Sudanese Red Sea coast

Objective:To present an updated and compiled checklist of Sudanese seaweeds as an example for the region for conservational as well as developmental purposes.Methods:The checklist was developed based on both field investigations using line transect method at 4 sites along the Red Sea coast of Sudan and review of available studies done on Sudanese seaweeds.Results:In total 114 macroalgal names were recorded and were found to be distributed in 16 orders,34 families,and 62 genera.The Rhodophyceae macroalgae contained 8 orders,17 families,32 genera and 47 species.The Phaeophyceae macroalgae composed of 4 orders,5 families,17 genera,and 28 species.The 39 species of the Chlorophyceae macroalgae belong to 2 classes,4 orders,12 families,and 14 genera.The present paper proposed the addition of 11 macroalgal taxa to be included in Sudan seaweeds species list.These include 3 red seaweed species,1 brown seaweed species and 7 green seaweed species.Conclusions:This list is not yet inclusive and it only represents the macroalgal species common to the intertidal areas of Sudan Red Sea coast.Further investigation may reveal the presence of more species.While significant levels of diversity and endemism were revealed for other groups of organisms in the Red Sea region,similar work still has to be performed for seaweeds.Considering the impact of climate change on communities’structure and composition and the growing risk of maritime transportation through the Red Sea particularly that may originate from oil tankers as well as that may emanate from oil exploration,baseline data on seaweeds are highly required for management purposes.