We help aspirants to clear UPSC Civil Services Exam by guiding and providing data on daily basis and use test based approach to prepare them for UPSC Civil Services Exam. Let's Crack UPSC CSE 115,293 views 17:07 SAGARMALA PROJECT | ECOFFAIRS 2020 | SPEED ECONOMY | INDIA'S BEST ONLINE CLASSES for CSE | NEO IAS - Duration: 5:05. A harmful algal bloom (HAB) is an algal bloom that causes negative impacts to other organisms via production of natural toxins, (or otherwise harmful phytoplankton such as dinoflagellates ) mechanical damage to other organisms, or by other means. Follow us. They cause damage by producing biological toxins or interfere with mechanical functions or organisms. Some of the major marginal seas include the Arabian Sea, Baltic Sea, Bay of Bengal, Bering Sea, Black Sea, Gulf of California, Gulf of Mexico, Mediterranean Sea, Red Sea, and all four of the Siberian Seas (Barents, Kara, Laptev, and East Siberian). Algal bloom is the rapid increase of algae in the fresh and marine waters which depletes the supply of oxygen leading to the death of marine life.This rapid spread of algal bloom has negative implications on the countries around the Arabian Sea. endobj <> A team of Dedicated Mentors are at work to help you through Revision, Current Affairs, Test Series, Standard Notes to ace Your Dream to became an IAS ! “An algal bloom can be defined as a rapid increase in the population of algae in an aquatic ecosystem.”. About Harmful Algal Blooms: Harmful algal blooms, or HABs, occur when colonies of algae — simple plants that live in the sea and freshwater — grow out of control and produce toxic or harmful effects on people, fish, shellfish, marine mammals and birds. They may occur in freshwater as well as marine environments. The Algal Bloom Information Service (ABIS) has been launched to provide timely information on harmful algal blooms, which are detrimental to coastal fisheries and also tend to induce respiratory problems within the coastal population from time to time. They can cause algal blooms. Share on Facebook. Thus, lakes, rivers and other waterbodies will be less vulnerable to algal blooms and associated ecological problems. 4 0 obj HABs are also responsible for mass die-offs, where a large population of species dies after consumption of the toxic algae. Examples: Microcystis, Anabaena, Oscillatoria, etc. Select the correct answer from the codes given below: a) 1, 2 and 3 only b) 1, 3 and 4 only c) 2 and 4 only d) 1, 2, 3 and 4 4. The target users are fishermen, marine fishery resource managers, researchers, ecologists and environmentalists. Your One-Stop Solution for All round UPSC Civil Service Exam Preparations. These nutrients are usually introduced into an aquatic ecosystem through agricultural runoffs, sewage runoffs and other anthropogenic causes. Search for: Prelims. The human illnesses caused by HABs, though rare, can be debilitating or even fatal. Loss of flora and fauna 3. Previous Post Previous The Big Picture: GST: What are the hitches to be sorted out? The increasing frequency of algal blooms is a major concern due to its ill effects on fishery, marine life and water quality. These conditions will lead to the rapid growth of algae. Harmful algal blooms most notably affect sea birds, sea turtles, marine mammals and many species of finfishes. Cyanobacteria blooms are often called blue-green algae. This algal growth floats on the water surface and look like foam or soap lather. Harmful Algal Blooms, or HABs, occur when colonies of algae grow out of control and produce toxic or harmful effects on people, fish, shellfish, marine mammals and birds. These organisms are called phytoplankton, and about 5,000 species have been discovered till date. Red tides, blue-green algae, and cyanobacteria are examples of harmful algal blooms that can have severe impacts on human health, aquatic ecosystems, and the economy. 1. Some the countries surrounding Arabian sea are India,Yemen,Oman,Iran,Srilanka,Maldivies etc. 1. Which of the statements given above is/are correct ? INCOIS has developed a service for “Detection and Monitoring of Bloom in the Indian Seas”. %���� Discharge of nutrients from the estuaries. The human illnesses caused by HABs, though rare, can be debilitating or even fatal. One stop destination for UPSC Civil Services Exam Preparation. Wildlife sanctuaries 3. <>>> Creation of algal blooms. In a marine environment, single-celled, autotrophic organisms form the base of the food web. Share. The algal blooms are a major concern for the coastal population due to its damaging effects on the marine life, fishery sector and water quality. Mixing of warm and cold water currents in oceans ; Run-off from the land during the monsoon; Upwelling in the seas; Discharge of phosphorus-containing sewage in oceans; Increase of salt in sea; Select the correct answer from the codes given … However, algal blooms can also be … Select the correct answer from the codes given below: a) 1, 2 and 3 only b) 1, 3 and 4 only c) 2 and 4 only d) 1, 2, 3 and 4 4. The human illnesses caused by HABs, though rare, can be debilitating or even fatal. Your Success, Our Achievement. What could be the causative factors for this phenomenon? endobj <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 841.92] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> These include: 1. Biosphere reserve 4. Prelims Syllabus; Prelims Strategy; Prelims Reference Sources ; Previous Year Papers; Mains. 8) Required fields are marked *. GK, General Studies, Optional notes for UPSC, IAS, Banking, Civil Services. The most common cause of algal blooms is a sudden increase of nutrients which are typically needed by algae for growth. Algal blooms may occur in freshwater as well as marine environments. Share. INCOIS has developed a service for “Detection and Monitoring of Bloom in the Indian Seas”. Or Call us on- 9354229384, 9354252518, 9999830584. click here What could be the causative factors for this phenomenon? a) 1 only b) 2 only c) Both 1 and 2 d) Neither 1 nor 2. Keep people and pets away from water that is green, scummy or smells bad. Within the United States, these blooms appear in three main coastal areas. �0C���`���{DG���(�p���/� ��l7��̣�����F�#-�y�� �(��u&Ag. Mind the words: “less vulnerable”, not “completely immune”, because industrial effluents can still cause algal bloom. Climate Change and Harmful Algal Blooms Scientists predict that climate change will have many effects on freshwater and marine environments. Share. Marginal Seas In oceanography, a marginal sea is a sea partially enclosed by islands, archipelagos, or peninsulas. These nutrients are usually introduced into an aquatic ecosystem through agricultural runoffs, sewage runoffs and other anthropogenic causes. Excess fertilisers may reach the groundwater by leaching or may be mix… INCOIS has developed a service for "Detection and Monitoring of Bloom in the Indian Seas". Giant kelp forests are examples of a multicellular algal bloom. Loss of flora and fauna 3. An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems, and is often recognized by the discoloration in the water from their pigments. 3 0 obj The site intends to provide free study notes, knowledge or … <> Loss of ecosystem services 2. Skip to content (Press Enter) IAS-UPSC.com. 3. These toxin-producing species are termed as Harmful Algal Blooms (HABs). An algal bloom or algae bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems, and is often recognized by the discoloration in the water from their pigments. Night Mode; Home; Forum; COURSES. Ocean currents drive up nutrients to the surface from the depths, and the abundance of nutrients, combined with sunlight on the ocean surface provides a very favourable environment for the algae to grow. 1 0 obj Red tides are events in which estuarine, marine, or fresh water algae accumulate rapidly in the water column, resulting in coloration of the surface water. We have launched our mobile APP get it now. BLUE TIDES Environment. The phenomenon can be easily recognised by the discolouration on the surface of the water. Algal blooms may occur in freshwater as well as marine environments. These effects, along with nutrient pollution, might cause harmful algal blooms to occur more often, in more waterbodies and to be more intense. … A type of harmful algal bloom, red tides refer to toxic blooms of microscopic algae that occur worldwide. The term algae encompasses many types of aquatic photosynthetic organisms, both macroscopic, multicellular organisms like seaweed and microscopic, unicellular organisms like … We have launched our mobile APP get it now. Or Call us on- 9354229384, 9354252518, 9999830584. click here stream An algal bloom or algae bloom is a rapid increase or aggregation in the algae population of freshwater or marine water systems and is often identified by water discolouration of their pigments. Similar to the blue tide, there exists another such phenomenon called red tide or harmful algal blooms that emits red light. Issue of Algal Bloom.  Algal blooms may occur in freshwater as well as marine environments. However, algal blooms can also be caused naturally. Within the United States, these blooms appear in three main coastal areas. There is a concern: over the increase in harmful algal blooms in the seawaters of India. Loss of ecosystem services 2. An algal bloom or marine bloom or water bloom is a rapid increase in the population of algae in an aquatic system. Sea Sparkle. Such blooms often take on a red or brown hue and are known as red tides. Harmful algal blooms (also known as HABs) result from the rapid growth, or bloom, of algae that can cause harm to animals, people, or the local environment. Your email address will not be published. What is/are the characteristics of a water body with cultural eutrophication? Issue of Algal Bloom. Creation of algal blooms. 2 0 obj Algal blooms can be found in either a marine environment or a freshwater environment. It usually occurs due to the introduction of a nutrient (such as nitrogen or phosphorus) into an aquatic ecosystem. Eutrophic water body: it is a a body of water rich in nutrients and so supporting a dense plant population, the decomposition of which kills animal life by depriving it of oxygen. Eutrophication & Algal Bloom. 2. Of these 5,000 species, 2% of the phytoplankton species are known to be toxic. Consuming the affected meat can cause various syndromes such as Neurotoxic shellfish poisoning, paralytic shellfish poisoning, diarrheal shellfish poisoning and amnesic shellfish poisoning. What could be the causative factors for this phenomenon? Harmful algal blooms are a major environmental problem in all 50 states. They may occur in freshwater as well as marine environments. Harmful algal blooms, or HABs, occur when colonies of algae — simple plants that live in the sea and freshwater — grow out of control and produce toxic or harmful effects on people, fish, shellfish, marine mammals and birds. 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