Marine Algal Bloom Characteristics Causes And Climate Change Impacts

In the marine environment, single-celled, microscopic, plant-like organisms naturally occur in the well-lit surface layer of any body of water. These organisms, referred to as phytoplankton or microalgae, form the base of the food web upon which nearly all other marine organisms depend. Algal bloom is a rapid increase in or accumulation of the population of about 300 species of algae due to excess nutrients (eutrophication), and is of major global interest as it causes reduction in species diversity, abrupt changes in water quality, and discoloration of the water (green, yellow, brown or red) depending on the species of algae and the type of pigments they contain. Dying blooms can also be an environmental concern as when the cells sink and decay, bacteria break down the organic material, which in turn strips oxygen from the water. This microbial oxygen demand at times leads to very low oxygen levels in the bottom waters, harming aquatic life. Documentation of this sporadic high abundance of algae, together with the significant species richness of the diatoms, requires comprehensive studies in the Sundarban coastal environment, which is facing severe degradation due to natural & anthropogenic stressors. In addition, a better understanding of the effects of algal blooms on seafood quality, the complex biological, chemical and physical interactions and subsequent effects on trophodynamics is needed to develop strategies for effective coastal zone management. The book discusses the occurrence of harmful algal blooms (HABs) caused by the dinoflagellates of the genus Alexandrium and Karenia, or diatoms of the genus Pseudo-nitzschia, which have large and varied impacts on marine ecosystems (such as large-scale marine mortality events that have been associated with various types of shellfish poisonings) depending on the species involved, the environment where they are found, and the mechanism by which they exert negative effects. HABs represent a major environmental problem in all regions of the U.S., and their occurrence is on the rise due to increased nutrient pollution. HABs have severe impacts on human health, aquatic ecosystems, and the economy. Such blooms, known colloquially as red tides due to their red or brown hues, are increasing in frequency and magnitude worldwide as a result of changes in oceanic climate, increased coastal eutrophication and enhanced long-distance dispersal in ballast water. As such, the book offers an in-depth account of the complex biological, chemical and physical interactions of the algal blooms (both innocuous and harmful ones). It also discusses the highly topical issue of the impact of global climate change on the frequency and severity of HABs in the context of alterations in temperature, stratification, light and ocean acidification. Focusing on both basic and applied limnology, this book is a reliable and up-to-date reference resource for students, teachers and researchers engaged in the field of coastal research/management at regional and global scales.

Harmful Algal Blooms: A Compendium Desk Reference provides basic information on harmful algal blooms (HAB) and references for individuals in need of technical information when faced with unexpected or unknown harmful algal events. Chapters in this volume will provide readers with information on causes of HAB, successful management and monitoring programs, control, prevention, and mitigation strategies, economic consequences of HAB, associated risks to human health, impacts of HAB on food webs and ecosystems, and detailed information on the most common HAB species. Harmful Algal Blooms: A Compendium Desk Reference will be an invaluable resource to managers, newcomers to the field, those who do not have easy or affordable access to scientific literature, and individuals who simply do not know where to begin searching for the information needed, especially when faced with novel and unexpected HAB events. Edited by three of the world's leading harmful algal bloom researchers and with contributions from leading experts, Harmful Algal Blooms: A Compendium Desk Reference will be a key source of information for this increasingly important topic.

Harmful algal blooms (HABs) - blooms that cause fish kills, contaminate seafood with toxins, or cause human or ecological health impacts and harm to local economies - are occurring more often, in more places and lasting longer than in past decades. This expansion is primarily the result of human activities, through increased nutrient inputs and various aspects of climate change. The Global Ecology and Oceanography of Harmful Algal Blooms (GEOHAB) programme promoted international collaboration to understand HAB population dynamics in various oceanographic regimes and to improve the prediction of HABs. This volume introduces readers to the overarching framework of the GEOHAB programme, factors contributing to the global expansion of harmful algal blooms, the complexities of HABs in different habitats, and the forward-looking issues to be tackled by the next generation of GEOHAB, GlobalHAB. The programme brought together an international team of contributing scientists and ecosystem managers, and its outcomes will greatly benefit the international research community.

The oceans and the marine environment, covering about 70% of the earth, are critically important to humans. Marine biology provides an understanding of the various organisms that inhabit this essential ecosystem. Recently, biologists encompassing a broad interdisciplinary community of researchers and industrialists have gained enormous interest in understanding the enigmas of survival, the food web, primary production, natural products, interactions and competition, communication, reproduction, evolution, diversity, fouling and many other aspects pertaining to the marine ecosystem. This book encompasses original and internationally significant contributions from all fields of marine biology that promote understanding of the current marine environment and its life forms. It offers insights from a range of scientific sub-disciplines, and will prove beneficial for students, researchers, scientists and industrialists. It addresses topics such as bioremediation, authentication, biodiversity, as well as commercial utility.

Circular Bioeconomy: Technologies for Waste Remediation covers information about the strategies and approaches facilitating the integration of technologies for wastewater and solid waste remediation. The book highlights the models developed to valorize wastes to produce biobased products. Various chapters presented in the book put a focus on sustainability approaches as a central theme in order to facilitate industries and policymakers to adopt circular economy goals. Since the principal idea of a circular bioeconomy is to transition from a linear economy, it involves advanced technological and designing breakthroughs to reduce waste with a closed looped system. Covers the integration of technologies and processes for waste remediation Narrates recent developments and perspectives on value added products from wastes Summarizes recent developments in lifecycle assessment and techno economic analysis using wastes for sustainable development Offers academicians, engineers, researchers and stakeholders help in adapting suitable technologies for solid waste and wastewater management

Bidong Island is a small island located in the South China Sea, and is about 14 km from mainland Peninsular Malaysia. The island and the Bidong archipelago boast of its richness in diversity of both terrestrial and marine organisms and its undeniably pristine and thriving ecosystem. In 1975–1990, Bidong Island was formerly a UNHCR refugee camp for a quarter of a million Vietnamese "Boat people" escaping the Vietnam War, and still holds great significance to many of its descendants. Due to its historical significance, the Terengganu State government plans to develop Bidong Island as a heritage tourism site and a new scuba diving destination. This book highlights the uniqueness of Bidong Island and its archipelago, paying particular attention to the biological aspect (which includes marine and terrestrial organisms) and the pollution status surrounding the island. These mainly focus on organisms of the open water and benthic ecosystems such as plankton, fishes, corals reef communities, crustaceans and foraminifera. In addition, we discuss terrene related topics, which includes tree diversity, lichens and also herpetofauna surrounding the Bidong Island. Indisputably an important topic, we also address the pollution status surrounding Bidong Island, with emphasis on heavy metals and its impact. Readers interested in the areas of environmental sciences should find this book appealing. This book can also be used by students and researchers when discussing about tropical environments on island ecosystems. We do hope that stakeholders that would partake in future interest of Bidong Island (particularly in tourism) are equally aware of the current health status of the island and would engage in conserving and sustaining the diversity and heritage of the archipelago for the benefit of the community.