{"id":21617,"date":"2024-01-11T07:57:21","date_gmt":"2024-01-11T07:57:21","guid":{"rendered":"https:\/\/edukemy.com\/blog\/?p=21617"},"modified":"2026-09-17T08:52:12","modified_gmt":"2026-09-17T08:52:12","slug":"what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023","status":"publish","type":"post","link":"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/","title":{"rendered":"What are the factors affecting regional ecological changes? How do these affect human health? &#8211; UPSC Geography Optional Mains &#8211; 2023"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/edukemy.com\/upsc\/upsc-prelims-support-program-with-test-series?type=classroom\" target=\"_blank\" rel=\"noreferrer noopener\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"300\" src=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/10\/GS-Foundation-Course-for-UPSC-1280-x-300-px-1-1024x300.png\" alt=\"\" class=\"wp-image-46623\"\/><\/a><\/figure>\n\r\n\r\n\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6abdf191b35a4\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6abdf191b35a4\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#i\" >\u00a0<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#1_Drivers_Factors_Behind_Regional_Ecological_Changes\" >1. Drivers &amp; Factors Behind Regional Ecological Changes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#A_Deforestation_and_Land-Use_Transformation\" >A. Deforestation and Land-Use Transformation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#B_Agricultural_Intensification_Monoculture\" >B. Agricultural Intensification &amp; Monoculture<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#C_Anthropogenic_Modification_of_Biogeochemical_Cycles\" >C. Anthropogenic Modification of Biogeochemical Cycles<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#D_Hydrological_Riverine_Disruption\" >D. Hydrological &amp; Riverine Disruption<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#E_Biological_Invasions\" >E. Biological Invasions<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#2_Ecological_Manifestations_of_Ecosystem_Disruptions\" >2. Ecological Manifestations of Ecosystem Disruptions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#A_Primary_Trophic_Level_Vulnerability\" >A. Primary Trophic Level Vulnerability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#B_Habitat_Loss_Edge_Effects\" >B. Habitat Loss &amp; Edge Effects<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#C_Simplification_of_Food_Webs\" >C. Simplification of Food Webs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#D_Elimination_of_Apex_Predators_Keystone_Species\" >D. Elimination of Apex Predators (Keystone Species)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#E_Disruption_of_Ecological_Niche_Loss_of_Foundation_Species\" >E. Disruption of Ecological Niche &amp; Loss of Foundation Species<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#3_Cascading_Impacts_on_Human_Health\" >3. Cascading Impacts on Human Health<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#A_Impact_via_Disrupted_Ecosystem_Services\" >A. Impact via Disrupted Ecosystem Services<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#1_Provisioning_Services_Food_Water_Security\" >1. Provisioning Services (Food &amp; Water Security)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#2_Regulating_Services_Disease_Water_Regulation\" >2. Regulating Services (Disease &amp; Water Regulation)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#3_Supporting_Services_Soil_Nutrient_Cycling\" >3. Supporting Services (Soil &amp; Nutrient Cycling)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#4_Cultural_Social_Services_Displacement_Mental_Health\" >4. Cultural &amp; Social Services (Displacement &amp; Mental Health)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#B_Zoonotic_Spillover_Vector-Borne_Disease_Outbreaks\" >B. Zoonotic Spillover &amp; Vector-Borne Disease Outbreaks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#C_Extreme_Climate_Events_Public_Health_Vulnerability\" >C. Extreme Climate Events &amp; Public Health Vulnerability<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#Frequently_Asked_Questions_FAQs\" >Frequently Asked Questions (FAQs)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#Q1_What_is_the_%E2%80%9CDilution_Effect%E2%80%9D_in_environmental_health_and_how_does_biodiversity_loss_affect_it\" >Q1. What is the &#8220;Dilution Effect&#8221; in environmental health, and how does biodiversity loss affect it?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#Q2_How_does_the_loss_of_a_keystone_species_impact_regional_human_health\" >Q2. How does the loss of a keystone species impact regional human health?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#Q3_What_is_the_%E2%80%98One_Health_approach_in_the_context_of_UPSC_Environmental_Geography\" >Q3. What is the &#8216;One Health&#8217; approach in the context of UPSC Environmental Geography?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#In_case_you_still_have_your_doubts_contact_us_on_9773890604\" >In case you still have your doubts, contact us on 9773890604<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/#Visit_our_YouTube_Channel_%E2%80%93_here\" >Visit our YouTube Channel &#8211;\u00a0here<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 class=\"cdk-visually-hidden\"><span class=\"ez-toc-section\" id=\"i\"><\/span><span style=\"font-size: 14px; font-family: 'PT Serif', serif;\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h1>\r\n<div id=\"chat-history\" class=\"chat-history-scroll-container lm remove-desktop-scroll-mask\">\r\n<div id=\"9e3dd698f1b40bdd\" class=\"conversation-container message-actions-hover-boundary ng-star-inserted\">\r\n<div class=\"response-container response-container-with-gpi ng-tns-c22998378-37 no-background is-mobile response-container-has-multiple-responses\" data-hveid=\"1\">\r\n<div class=\"presented-response-container ng-tns-c22998378-37\" data-hveid=\"2\">\r\n<div class=\"response-container-content ng-tns-c22998378-37 is-mobile\">\r\n<div class=\"response-content ng-tns-c22998378-37\">\r\n<div class=\"container\">\r\n<div id=\"model-response-message-contentr_9e3dd698f1b40bdd\" class=\"markdown markdown-main-panel md-content enable-luminous-fast-follows enable-updated-hr-color stronger tutor-markdown-rendering\" dir=\"ltr\" aria-busy=\"false\" aria-live=\"polite\">\r\n<p data-path-to-node=\"8\">In pristine nature, ecological stability is governed by homeostatic feedback mechanisms (<b data-path-to-node=\"8\" data-index-in-node=\"89\">negative feedback loops<\/b>) that maintain equilibrium across biogeochemical cycles and food webs. However, the acceleration of the Anthropocene\u2014marked by intense anthropogenic forcing\u2014has shifted natural systems into <b data-path-to-node=\"8\" data-index-in-node=\"303\">positive feedback loops<\/b>. This transition drives widespread regional ecological degradation and severe ecosystem disequilibrium.<\/p>\r\n<p data-path-to-node=\"9\">Regional ecological changes are not isolated geographic phenomena; they cascade across spatial scales, disrupting crucial ecosystem services and directly threatening human health and survival.<\/p>\r\n<h2 data-path-to-node=\"11\"><span class=\"ez-toc-section\" id=\"1_Drivers_Factors_Behind_Regional_Ecological_Changes\"><\/span><strong>1. Drivers &amp; Factors Behind Regional Ecological Changes<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p data-path-to-node=\"12\">Regional ecological transformations stem from a synergy of land-use changes, resource over-exploitation, and industrial pollution.<\/p>\r\n<h3 data-path-to-node=\"13\"><span class=\"ez-toc-section\" id=\"A_Deforestation_and_Land-Use_Transformation\"><\/span><strong>A. Deforestation and Land-Use Transformation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"14\">\r\n<li>\r\n<p data-path-to-node=\"14,0,0\"><b data-path-to-node=\"14,0,0\" data-index-in-node=\"0\">Agricultural Expansion &amp; Urbanization:<\/b> Converting natural forests into cropland or urban sprawls alters regional albedo, localized evapotranspiration rates, and soil moisture regimes.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"14,1,0\"><b data-path-to-node=\"14,1,0\" data-index-in-node=\"0\">Resource Extraction:<\/b> Open-cast mining and infrastructure projects (e.g., roads, linear corridors) cause severe habitat fragmentation and edge effects.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"15\"><span class=\"ez-toc-section\" id=\"B_Agricultural_Intensification_Monoculture\"><\/span><strong>B. Agricultural Intensification &amp; Monoculture<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"16\">\r\n<li>\r\n<p data-path-to-node=\"16,0,0\">Driven by market profitability and food security demands, monoculture replaces bio-diverse ecosystems with simplified, vulnerable agro-ecosystems.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"16,1,0\">Continuous cultivation strips soil organic carbon and eliminates localized microclimates.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"17\"><span class=\"ez-toc-section\" id=\"C_Anthropogenic_Modification_of_Biogeochemical_Cycles\"><\/span><strong>C. Anthropogenic Modification of Biogeochemical Cycles<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"18\">\r\n<li>\r\n<p data-path-to-node=\"18,0,0\">Atmospheric, aquatic, and terrestrial pollution alters natural flux rates in carbon, nitrogen, and phosphorus cycles.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"18,1,0\">Eutrophication from chemical runoff drastically lowers dissolved oxygen levels in freshwater and coastal zones.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"19\"><span class=\"ez-toc-section\" id=\"D_Hydrological_Riverine_Disruption\"><\/span><strong>D. Hydrological &amp; Riverine Disruption<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"20\">\r\n<li>\r\n<p data-path-to-node=\"20,0,0\">Construction of large dams, barrages, and channel diversions alters natural river flow regimes, destroys floodplains, impedes silt transport, and disrupts aquatic corridors.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"21\"><span class=\"ez-toc-section\" id=\"E_Biological_Invasions\"><\/span><strong>E. Biological Invasions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"22\">\r\n<li>\r\n<p data-path-to-node=\"22,0,0\">The introduction of <b data-path-to-node=\"22,0,0\" data-index-in-node=\"20\">Invasive Alien Species (IAS)<\/b> disrupts native community dynamics, outcompetes endemic biota for resources, and alters ecological niches.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-path-to-node=\"24\"><span class=\"ez-toc-section\" id=\"2_Ecological_Manifestations_of_Ecosystem_Disruptions\"><\/span><strong>2. Ecological Manifestations of Ecosystem Disruptions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p data-path-to-node=\"25\">These drivers trigger structural and functional changes across regional ecological hierarchies:<\/p>\r\n<div class=\"code-block ng-tns-c3243601800-41 ng-animate-disabled ng-trigger ng-trigger-codeBlockRevealAnimation\" data-hveid=\"0\" data-ved=\"0CAAQhtANahgKEwjuw_bN__SWAxUAAAAAHQAAAAAQsQE\">\r\n<div class=\"formatted-code-block-internal-container ng-tns-c3243601800-41\">\r\n<div class=\"animated-opacity ng-tns-c3243601800-41\">\r\n<pre class=\"ng-tns-c3243601800-41\"><code class=\"code-container formatted ng-tns-c3243601800-41 no-decoration-radius\" role=\"text\" data-test-id=\"code-content\">[Anthropogenic Forcing] \r\n       \u2502\r\n       \u25bc\r\n[Primary Trophic Collapse] \u2500\u2500\u25ba [Habitat Fragmentation] \u2500\u2500\u25ba [Trophic Cascades]\r\n       \u2502\r\n       \u25bc\r\n[Ecosystem Service Loss] \u25c4\u2500\u2500 [Niche Disruption &amp; Extinction]\r\n<\/code><\/pre>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<h3 data-path-to-node=\"27\"><span class=\"ez-toc-section\" id=\"A_Primary_Trophic_Level_Vulnerability\"><\/span><strong>A. Primary Trophic Level Vulnerability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p data-path-to-node=\"28\">Disruptions at the base of terrestrial and marine food chains (e.g., phytoplankton die-offs from ocean warming\/acidification) diminish the carrying capacity of entire ecosystems.<\/p>\r\n<h3 data-path-to-node=\"29\"><span class=\"ez-toc-section\" id=\"B_Habitat_Loss_Edge_Effects\"><\/span><strong>B. Habitat Loss &amp; Edge Effects<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"30\">\r\n<li>\r\n<p data-path-to-node=\"30,0,0\">According to the <b data-path-to-node=\"30,0,0\" data-index-in-node=\"17\">IUCN<\/b>, habitat loss remains the dominant threat to over <b data-path-to-node=\"30,0,0\" data-index-in-node=\"72\">85%<\/b> of species listed on the Red List.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"30,1,0\"><i data-path-to-node=\"30,1,0\" data-index-in-node=\"0\">Case Study:<\/i> Mining activities in the <b data-path-to-node=\"30,1,0\" data-index-in-node=\"37\">Dalma Hills (Jharkhand)<\/b> have severely fragmented elephant corridors, forcing herds into human settlements across the <b data-path-to-node=\"30,1,0\" data-index-in-node=\"154\">Singhbhum district (Jharkhand)<\/b> and the <b data-path-to-node=\"30,1,0\" data-index-in-node=\"193\">western districts of West Bengal<\/b>, leading to high human-animal conflict and loss of lives and crops.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"31\"><span class=\"ez-toc-section\" id=\"C_Simplification_of_Food_Webs\"><\/span><strong>C. Simplification of Food Webs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"32\">\r\n<li>\r\n<p data-path-to-node=\"32,0,0\">Invasions by generalist species cause simplified food webs.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"32,1,0\"><i data-path-to-node=\"32,1,0\" data-index-in-node=\"0\">Example:<\/i> The introduction of the <b data-path-to-node=\"32,1,0\" data-index-in-node=\"33\">Common Carp (<i data-path-to-node=\"32,1,0\" data-index-in-node=\"46\">Cyprinus carpio<\/i>)<\/b> in aquatic ecosystems leads to severe macrophyte uprooting, turbidity, and population crashes among indigenous species.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"33\"><span class=\"ez-toc-section\" id=\"D_Elimination_of_Apex_Predators_Keystone_Species\"><\/span><strong>D. Elimination of Apex Predators (Keystone Species)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"34\">\r\n<li>\r\n<p data-path-to-node=\"34,0,0\">Eliminating top-tier carnivores triggers top-down <b data-path-to-node=\"34,0,0\" data-index-in-node=\"50\">trophic cascades<\/b>, causing unchecked boom-bust cycles in lower trophic levels.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"34,1,0\"><i data-path-to-node=\"34,1,0\" data-index-in-node=\"0\">Example:<\/i> The loss of <b data-path-to-node=\"34,1,0\" data-index-in-node=\"21\">Sea Otters<\/b> along the Northern Pacific coast caused sea urchin populations to surge, destroying the region&#8217;s kelp forest ecosystems.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<div class=\"attachment-container search-images\">\r\n<div class=\"image-container spark-licensed-center hide-from-message-actions ng-star-inserted\" data-full-size-image-uri=\"https:\/\/bullkelp.info\/sites\/default\/files\/2024-11\/community_web02.jpg\">\r\n<div class=\"overlay-container hero-overlay-container ng-star-inserted\"><button class=\"image-button ng-star-inserted\"><img decoding=\"async\" class=\"spark-licensed-square hero-image loaded\" src=\"https:\/\/encrypted-tbn0.gstatic.com\/images?q=tbn:ANd9GcSeOsQdpDKCfB60-EnuWyVefMgKoEhA-EDmWaepl5yJDhhuoe5MYynnag&amp;s=10\" alt=\"Trophic Cascade in Kelp Forest Ecosystems, AI generated\" width=\"554\" height=\"554\" \/><\/button>\r\n<div class=\"hero-caption-row ng-star-inserted\">\r\n<div class=\"caption gds-extended-caption hero-caption ng-star-inserted\" aria-hidden=\"true\">\u00a0<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<h3 data-path-to-node=\"37\"><span class=\"ez-toc-section\" id=\"E_Disruption_of_Ecological_Niche_Loss_of_Foundation_Species\"><\/span><strong>E. Disruption of Ecological Niche &amp; Loss of Foundation Species<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"38\">\r\n<li>\r\n<p data-path-to-node=\"38,0,0\">Loss of foundational structural organisms alters local microclimates and habitats.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"38,1,0\"><i data-path-to-node=\"38,1,0\" data-index-in-node=\"0\">Example:<\/i> Marine heatwaves and warming in the <b data-path-to-node=\"38,1,0\" data-index-in-node=\"45\">Tasmanian Sea<\/b> destroyed over <b data-path-to-node=\"38,1,0\" data-index-in-node=\"74\">95% of the Eastern Tasmanian Giant Kelp forests<\/b> in recent decades, causing widespread localized extinctions, including native sea urchins and endemic marine biota.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-path-to-node=\"40\"><span class=\"ez-toc-section\" id=\"3_Cascading_Impacts_on_Human_Health\"><\/span><strong>3. Cascading Impacts on Human Health<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p data-path-to-node=\"41\">Human health relies on four primary categories of ecosystem services (<b data-path-to-node=\"41\" data-index-in-node=\"70\">MEA framework<\/b>). Disruptions to these services present major public health challenges.<\/p>\r\n<h3 data-path-to-node=\"43\"><span class=\"ez-toc-section\" id=\"A_Impact_via_Disrupted_Ecosystem_Services\"><\/span><strong>A. Impact via Disrupted Ecosystem Services<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<h4 data-path-to-node=\"44\"><span class=\"ez-toc-section\" id=\"1_Provisioning_Services_Food_Water_Security\"><\/span><strong>1. Provisioning Services (Food &amp; Water Security)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ul data-path-to-node=\"45\">\r\n<li>\r\n<p data-path-to-node=\"45,0,0\"><b data-path-to-node=\"45,0,0\" data-index-in-node=\"0\">Agricultural Yield Decline:<\/b> According to the <b data-path-to-node=\"45,0,0\" data-index-in-node=\"45\">IPCC<\/b>, global food production potential drops by approximately <b data-path-to-node=\"45,0,0\" data-index-in-node=\"107\">2% per decade<\/b> due to climate-driven droughts, soil degradation, and deforestation.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"45,1,0\"><b data-path-to-node=\"45,1,0\" data-index-in-node=\"0\">Malnutrition:<\/b> Declines in crop diversity and yield increase regional food insecurity and childhood stunting.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h4 data-path-to-node=\"46\"><span class=\"ez-toc-section\" id=\"2_Regulating_Services_Disease_Water_Regulation\"><\/span><strong>2. Regulating Services (Disease &amp; Water Regulation)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ul data-path-to-node=\"47\">\r\n<li>\r\n<p data-path-to-node=\"47,0,0\">Depletion and pollution of freshwater ecosystems aggravate water scarcity.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"47,1,0\">Scarcity forces reliance on contaminated sources, increasing the incidence of <b data-path-to-node=\"47,1,0\" data-index-in-node=\"78\">waterborne pathogens<\/b> (e.g., <i data-path-to-node=\"47,1,0\" data-index-in-node=\"106\">Vibrio cholerae<\/i>, dysentery, dysenteric gastroenteritis) and bioaccumulating industrial toxins in crops.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h4 data-path-to-node=\"48\"><span class=\"ez-toc-section\" id=\"3_Supporting_Services_Soil_Nutrient_Cycling\"><\/span><strong>3. Supporting Services (Soil &amp; Nutrient Cycling)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ul data-path-to-node=\"49\">\r\n<li>\r\n<p data-path-to-node=\"49,0,0\">Degradation of soil biota and fertility leads to systemic land degradation and regional agricultural collapse.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h4 data-path-to-node=\"50\"><span class=\"ez-toc-section\" id=\"4_Cultural_Social_Services_Displacement_Mental_Health\"><\/span><strong>4. Cultural &amp; Social Services (Displacement &amp; Mental Health)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n<ul data-path-to-node=\"51\">\r\n<li>\r\n<p data-path-to-node=\"51,0,0\">Forced ecological displacement fractures community ties and traditional knowledge structures.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"51,1,0\">Globally, over <b data-path-to-node=\"51,1,0\" data-index-in-node=\"15\">15 million people<\/b> are displaced annually by environmental degradation and infrastructure projects.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"51,2,0\"><i data-path-to-node=\"51,2,0\" data-index-in-node=\"0\">Indian Context:<\/i> In India, over <b data-path-to-node=\"51,2,0\" data-index-in-node=\"31\">80 million people<\/b> have been displaced by major developmental and ecological changes over the past 75 years. More than <b data-path-to-node=\"51,2,0\" data-index-in-node=\"149\">50%<\/b> face severe impoverishment, chronic malnutrition, and psychological distress (alienation and anxiety disorders).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"53\"><span class=\"ez-toc-section\" id=\"B_Zoonotic_Spillover_Vector-Borne_Disease_Outbreaks\"><\/span><strong>B. Zoonotic Spillover &amp; Vector-Borne Disease Outbreaks<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<ul data-path-to-node=\"54\">\r\n<li>\r\n<p data-path-to-node=\"54,0,0\"><b data-path-to-node=\"54,0,0\" data-index-in-node=\"0\">Habitat Encroachment &amp; Zoonoses:<\/b> Forest fragmentation reduces biodiversity (loss of the &#8220;dilution effect&#8221;) and increases contact between wild reservoir species and humans. This accelerates zoonotic spillover events (e.g., <b data-path-to-node=\"54,0,0\" data-index-in-node=\"222\">Ebola, Zika, SARS, MERS, COVID-19<\/b>).<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"54,1,0\"><b data-path-to-node=\"54,1,0\" data-index-in-node=\"0\">Climate-Driven Vector Shifts:<\/b> Temperature and rainfall fluctuations expand the geographic range and breeding seasons of insect vectors.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"54,2,0\"><i data-path-to-node=\"54,2,0\" data-index-in-node=\"0\">Indian Context:<\/i> Unseasonal early summers and erratic monsoons across the <b data-path-to-node=\"54,2,0\" data-index-in-node=\"73\">Gangetic Plains, West Bengal, and Kerala<\/b> have led to severe seasonal <b data-path-to-node=\"54,2,0\" data-index-in-node=\"142\">Dengue<\/b> outbreaks in Eastern India\/Bangladesh and recurrent <b data-path-to-node=\"54,2,0\" data-index-in-node=\"201\">Nipah virus<\/b> spillovers in Kerala.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-path-to-node=\"56\"><span class=\"ez-toc-section\" id=\"C_Extreme_Climate_Events_Public_Health_Vulnerability\"><\/span><strong>C. Extreme Climate Events &amp; Public Health Vulnerability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p data-path-to-node=\"57\">Global warming exacerbates heatwaves, tropical cyclones, and erratic rainfall, creating compounded health risks:<\/p>\r\n<ul data-path-to-node=\"58\">\r\n<li>\r\n<p data-path-to-node=\"58,0,0\"><b data-path-to-node=\"58,0,0\" data-index-in-node=\"0\">Direct Impacts:<\/b> Heat exhaustion, cardiovascular stress during extreme heatwaves, and direct casualties during cyclones.<\/p>\r\n<\/li>\r\n<li>\r\n<p data-path-to-node=\"58,1,0\"><b data-path-to-node=\"58,1,0\" data-index-in-node=\"0\">Indirect Impacts:<\/b> Displacement, destruction of healthcare infrastructure, and post-disaster disease outbreaks.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-path-to-node=\"64\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQs\"><\/span><strong>Frequently Asked Questions (FAQs)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<h3 data-path-to-node=\"65\"><span class=\"ez-toc-section\" id=\"Q1_What_is_the_%E2%80%9CDilution_Effect%E2%80%9D_in_environmental_health_and_how_does_biodiversity_loss_affect_it\"><\/span><strong>Q1. What is the &#8220;Dilution Effect&#8221; in environmental health, and how does biodiversity loss affect it?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p data-path-to-node=\"66\">The <b data-path-to-node=\"66\" data-index-in-node=\"4\">Dilution Effect<\/b> hypothesis suggests that high species diversity reduces disease risk by diluting the density of competent reservoir hosts for a given pathogen. When biodiversity declines due to habitat fragmentation or ecosystem degradation, resilient species (which are often effective disease reservoirs, like rodents) dominate, increasing the risk of zoonotic disease transmission to humans.<\/p>\r\n<h3 data-path-to-node=\"67\"><span class=\"ez-toc-section\" id=\"Q2_How_does_the_loss_of_a_keystone_species_impact_regional_human_health\"><\/span><strong>Q2. How does the loss of a keystone species impact regional human health?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p data-path-to-node=\"68\">Keystone species maintain the structure and stability of an ecosystem. Their loss can cause a trophic cascade that alters vector dynamics, degrades natural barriers against extreme weather, or destroys essential food sources. For example, the loss of apex predators can lead to rodent population booms, increasing the incidence of rodent-borne zoonotic infections.<\/p>\r\n<h3 data-path-to-node=\"69\"><span class=\"ez-toc-section\" id=\"Q3_What_is_the_%E2%80%98One_Health_approach_in_the_context_of_UPSC_Environmental_Geography\"><\/span><strong>Q3. What is the &#8216;One Health&#8217; approach in the context of UPSC Environmental Geography?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p data-path-to-node=\"70\">The <b data-path-to-node=\"70\" data-index-in-node=\"4\">One Health<\/b> approach is an integrated framework that recognizes that the health of humans, domestic and wild animals, plants, and the wider environment are closely linked and interdependent. In Geography Mains, it serves as a key strategy for managing zoonotic spillover risks, land degradation, and vector-borne diseases at the regional planning level.<\/p>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"In_case_you_still_have_your_doubts_contact_us_on_9773890604\"><\/span><strong>In case you still have your doubts, contact us on 9773890604<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>\r\n\r\n<\/p>\r\n<p>Enrol in Geography Optional by Shabbir Sir: <a href=\"https:\/\/edukemy.com\/upsc\/geography-optional-by-shabbir-sir-foundation-course\">Here<\/a><\/p>\r\n<p>Enrol in GS Mentorship Program: <a href=\"https:\/\/edukemy.com\/upsc\/gs-foundation-mentorship-program-led-by-shabbir-sir\">Here<\/a><\/p>\r\n<p>Enrol In GS Mains Mentorship Program<a href=\"https:\/\/edukemy.com\/upsc\/gs-mains-mentorship-program-led-by-shabbir-sir\">: Here<\/a><\/p>\r\n<p>Explore One Integrated Platform for UPSC Prep: <a href=\"http:\/\/askyooki.com\">Yooki<\/a><\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Visit_our_YouTube_Channel_%E2%80%93_here\"><\/span>Visit our YouTube Channel &#8211;\u00a0<a href=\"https:\/\/www.youtube.com\/@ShabbirsEduKemyforIAS\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><span class=\"ez-toc-section-end\"><\/span><\/h4>\r\n","protected":false},"excerpt":{"rendered":"<p>This exploration delves into the multifaceted drivers of regional ecological change and their cascading impacts on human health, urging us to listen to the whispers of the environment and weave a future where our own well-being is inextricably linked to the vitality of the ecosystems that sustain us.<\/p>\n","protected":false},"author":17,"featured_media":21619,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[1546],"tags":[143,1358,142,232,145,140],"class_list":["post-21617","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-upsc-geography-optional-mains-solved-paper-2023","tag-geography_optional","tag-human-health","tag-previous_year_questions","tag-upsc","tag-upsc-mains-question-paper","tag-upsc_preparation_strategy"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"This exploration delves into the multifaceted drivers of regional ecological change and their cascading impacts on human health, urging us to listen to the whispers of the environment and weave a future where our own well-being is inextricably linked to the vitality of the ecosystems that sustain us.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Edukemy Team\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/edukemy.com\/blog\/what-are-the-factors-affecting-regional-ecological-changes-how-do-these-affect-human-health-upsc-geography-optional-mains-2023\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.9\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Blog - Edukemy&#039;s Blog for aspirants\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"What are the factors affecting regional ecological changes? 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