{"id":31918,"date":"2025-04-11T07:27:48","date_gmt":"2025-04-11T01:57:48","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=31918"},"modified":"2025-04-16T17:46:38","modified_gmt":"2025-04-16T12:16:38","slug":"bioluminescent-backwaters","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/bioluminescent-backwaters\/","title":{"rendered":"Bioluminescent Backwaters"},"content":{"rendered":"<h2>Bioluminescent Backwaters Latest News<\/h2>\n<p>Recently, bioluminescent blue waves were observed in the backwaters of Kochi, Kerala, attracting tourists but raising concerns among ecologists and fishers due to underlying environmental degradation.<\/p>\n<h2>About Bioluminescence<\/h2>\n<ul>\n<li><strong>Bioluminescence<\/strong> refers to the <strong>natural emission of light<\/strong> by organisms such as <strong>bacteria, fungi, and algae<\/strong> triggered by <strong>mechanical disturbances<\/strong> in coastal and estuarine waters.<\/li>\n<li>The species most commonly responsible is <strong>Noctiluca scintillans<\/strong>, a type of <strong>dinoflagellate plankton<\/strong>, also known as <strong>\u201csea sparkle\u201d<\/strong>.<\/li>\n<li>This glow results from <strong>chemical reactions<\/strong> inside specialized structures called <strong>scintillons<\/strong> and appears primarily <strong>blue<\/strong> but can also show <strong>red or brown hues<\/strong> depending on species concentration.<\/li>\n<li>The phenomenon is commonly observed from <strong>March to May<\/strong>, locally termed as <strong>&#8220;Kavaru&#8221;<\/strong> in Malayalam.<\/li>\n<\/ul>\n<h2>Scientific Background<\/h2>\n<ul>\n<li><strong>Eutrophication<\/strong>\u2014caused by <strong>nutrient overload<\/strong> (especially <strong>nitrates<\/strong> and <strong>phosphates<\/strong>) from <strong>industrial runoff<\/strong> and <strong>sewage discharge<\/strong>\u2014is a major driver.<\/li>\n<li><strong>Salinity levels<\/strong> between <strong>30-35 ppt<\/strong>, <strong>rising temperatures<\/strong>, and <strong>reduced rainfall<\/strong> contribute to bloom formation.<\/li>\n<li>When concentrations exceed <strong>500,000 organisms per litre<\/strong>, it leads to <strong>red tides<\/strong>, which can severely disrupt marine ecosystems.<\/li>\n<\/ul>\n<h2>Ecological and Economic Impacts<\/h2>\n<ul>\n<li><strong>Plankton<\/strong>, while a key part of <strong>marine food chains<\/strong>, in large numbers release substances like <strong>dimethyl sulphide<\/strong>, <strong>ammonium<\/strong>, and <strong>dissolved organic carbon<\/strong>, causing <strong>Harmful Algal Blooms (HABs)<\/strong>.<\/li>\n<li>HABs lead to <strong>hypoxia<\/strong> (oxygen depletion), resulting in <strong>mass fish mortality<\/strong> and affecting <strong>biodiversity<\/strong> and <strong>aquaculture<\/strong> operations.<\/li>\n<li><strong>Fishing communities<\/strong> experience significant losses as <strong>fish migrate away<\/strong> from bloom-affected zones, leading to <strong>declining catches<\/strong> and <strong>reduced income<\/strong>.<\/li>\n<li><strong>Toxins<\/strong> such as <strong>domoic acid<\/strong> and those from <strong>Alexandrium<\/strong> can cause <strong>amnesic<\/strong> or <strong>paralytic shellfish poisoning<\/strong>, harming both marine life and <strong>human health<\/strong>.<\/li>\n<\/ul>\n<h2>Bioluminescent Backwaters FAQs<\/h2>\n<p><strong>Q1. <\/strong>What causes bioluminescence in backwaters?<br \/>\n<strong>Ans.<\/strong> Dinoflagellates (e.g., <i>Noctiluca scintillans<\/i>) emit light through chemical reactions when disturbed, creating glowing waters.<\/p>\n<p><strong>Q2. <\/strong>Where are bioluminescent backwaters found in India?<br \/>\n<strong>Ans. <\/strong>Kerala\u2019s Alleppey and Tamil Nadu\u2019s Pitchavaram mangroves are prime examples.<\/p>\n<p><strong>Q3. <\/strong>What ecological role do they play?<br \/>\n<strong>Ans.<\/strong> Indicate healthy marine ecosystems but signal algal blooms if excessive, threatening fish populations.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.downtoearth.org.in\/environment\/behind-the-beauty-of-kochis-bioluminescent-backwaters-lies-a-looming-crisis\" target=\"_blank\" rel=\"nofollow noopener\">DTE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bioluminescence is the natural light emission by organisms like bacteria, fungi, and algae, often triggered by movement in coastal and estuarine waters.<\/p>\n","protected":false},"author":5,"featured_media":31919,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-31918","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/31918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=31918"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/31918\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/31919"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=31918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=31918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=31918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}