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Harmful algal blooms in the coastal waters of Bangladesh: an overview


Journal of Aquaculture & Marine Biology
Nowrin Akter Shaika, Saleha Khan, Sunzida Sultana

Abstract

Harmful algal blooms (HABs) constitute a global problem, affecting aquatic ecosystems, human health, fisheries and local economies. TheBayofBengal, along the Bangladesh coast, isexceedinglysufferingfrompollutionoranthropogenicnutrificationthatinfluencesfrequentlyoccurring HABspecies.TheprogressionofclimatechangeandeutrophicationinvigorateHABtrendsandresponsesthatinturnaffecttherespectivecoastallivelihoodandeconomicgrowth.Triposspp.,Dinophysisspp.,Protoperidiniumspp.,Chaetocerosspp.,and Pseudo-nitzschiaspp. are the common bloom-forming HAB species in the coastal waters of Bangladesh.Despitehavinghugepotentialityfor regionalandglobalperspectives,thecoastalregionofBangladeshremainsrelativelyunexploredcomparedtoother regionsinthecontextofHABsandtheirperniciouseffects.Asaresult,harmfulalgalbloomsandtheaccumulation ofalgaltoxinsmayinterruptfisheries,aquaculture,aquaticecosystemsandpublichealthinthecountry.Therefore, properresearchonthebiologyandecologyofharmfulalgae,biotoxinsandtheirrelationshipwithenvironmental factorsneedtobeadequatelyunderstoodtominimizetheiradverseeffectsonthenotedmarineresourcesoftheBay.This review focused on an overview of the HAB related issues – causes of HABs, their occurrences and abundances, associated environmental factors and adverse effects in the coastal zone of Bangladesh.

Keywords

harmful algae, HABs, environmental factors, coastal waters, Bangladesh

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