**14. Conclusion**

The increasing incidences of toxic algal blooms have been reported at international level in the past decades. Which are contributed by various causes including eutrophication, climate changes, upwelling of oceans, including unhealthy coral reefs. All information presented here do recapitulate the current state of knowledge about HABs to better understand how change in climate affecting HABs and also coastal communities worldwide. This chapter highlights environmental factors like temperatures, nutrient and turbulence as scorable aspects for HABs. Also, it is essential to note that these type of change also have the potential ability to decrease

magnitude of HABs. Not any of the effects of change in climate discuss at this point are restricted comparatively to few HAB species only. Consequently allowing for the more possibility that in at least some cases several other species could also better exploit to resulting changes in the environmental conditions. Still there is insufficient evidence to resolve this issue. Considering the prediction of outlook HABs, scientists are increasingly being asked to envisage the effects of global change in environments. Now days advances in the understanding and prophecy of HABs is changing worldwide so it's time to formulate international scientific program/committee on harmful algal blooms for providing systematic knowledge to manage and mitigate their impacts.
