Recent Introduced Algal Species in the Egyptian Marine Waters

Marine non-indigenous species (NIS) pose considerable threats and represent a significant risk to the receiving environments. They could exhibit invasive behavior and cause changes to ecosystem structure and function, prohibit the delivery of ecosystem services, or even result in detrimental socioeconomic implications in coastal areas. The increased globalization and rising tendencies in human activities including shipping, aquaculture, fishing, tourism, and the aquarium trade have hastened the introduction of new NIS in recent decades. In addition, climatic change is one of the most important factors that have severe impacts on the marine ecosystems, including fauna and flora biodiversity. This chapter deals with the problem of the introduction of non-indigenous species (NIS) and their effect on native seaweeds and their biodiversity in the Egyptian waters. This chapter is also monitoring their presence which is essential for marine environmental management and sustainable development.