{"id":42974,"date":"2026-03-18T11:10:17","date_gmt":"2026-03-18T10:10:17","guid":{"rendered":"https:\/\/www.deepseareporter.com\/?p=42974"},"modified":"2026-03-18T11:10:19","modified_gmt":"2026-03-18T10:10:19","slug":"syrebrist-hotar-livet-i-varldens-mangroveskogar","status":"publish","type":"post","link":"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/","title":{"rendered":"Syrebrist hotar livet i v\u00e4rldens mangroveskogar"},"content":{"rendered":"\n

N\u00e4r haven v\u00e4rms upp blir det sv\u00e5rare f\u00f6r fiskar i mangroveskogarna att andas. Det visar en unik ny studie fr\u00e5n forskare vid G\u00f6teborgs universitet.<\/strong><\/p>\n\n\n\n

– I vissa system kommer f\u00f6rh\u00e5llandena bli s\u00e5 extrema att bara de mest anpassade arterna klarar sig, s\u00e4ger studiens huvudf\u00f6rfattare, marinkemisten Gloria Reithmaier.<\/strong><\/p>\n\n\n\n

Text: Amanda Saveland<\/sup><\/p>\n\n\n\n

V\u00e4rldens mangroveskogar fungerar som barnkammare f\u00f6r m\u00e5nga fiskarter. I skydd av tr\u00e4dens r\u00f6tter kan de ost\u00f6rt leta efter mat utan att bli upp\u00e4tna av st\u00f6rre rovfiskar. Det g\u00f6r att m\u00e4ngden fisk som lever d\u00e4r ber\u00e4knas vara ungef\u00e4r 20 000 fler per hektar och \u00e5r j\u00e4mf\u00f6rt med obevuxna havsbottnar. N\u00e5got som \u00e4ven p\u00e5verkar n\u00e4rliggande ekosystem, s\u00e5som korallrev, dit fiskarna tar sig n\u00e4r de vuxit till sig.<\/p>\n\n\n\n

Tidigare ber\u00e4kningar har uppskattat v\u00e4rdet av de h\u00e4r ekosystemtj\u00e4nsterna till 92,3 miljoner kronor. Men den viktiga rollen som mangroven har hotas nu av den globala uppv\u00e4rmningen. N\u00e4r haven blir varmare \u00f6kar \u00e4ven m\u00e4ngden koldioxid, och g\u00f6r att syret i mangroveskogarna n\u00e5r kritiskt l\u00e5ga niv\u00e5er samtidigt som koldioxiden blir skadligt h\u00f6g.<\/p>\n\n\n\n

– Det som f\u00f6rv\u00e5nade mig mest var hur m\u00e5nga mangroveskogar som redan nu \u00f6verskrider gr\u00e4nsen f\u00f6r n\u00e4r det blir sv\u00e5rt f\u00f6r fiskar att andas, s\u00e4ger Gloria Reithmaier.<\/p>\n\n\n\n

S\u00e5 p\u00e5verkas fiskarna<\/strong><\/h2>\n\n\n\n

I lokalerna d\u00e4r hon arbetar vid G\u00f6teborgs universitet regleras ventilationen utifr\u00e5n hur h\u00f6g koldioxidhalten i rummen \u00e4r. \u00d6verstiger den en viss gr\u00e4ns b\u00f6rjar fl\u00e4ktarna snurra snabbare f\u00f6r att f\u00e5 in mer syre.<\/p>\n\n\n\n

– \u00c4r det mycket koldioxid och d\u00e5ligt med syre i ett rum s\u00e5 k\u00e4nner vi ju av det direkt. Vi blir tr\u00f6tta och d\u00e5siga, och precis likadant \u00e4r det f\u00f6r fiskarna. De blir f\u00f6rvirrade och r\u00f6r sig l\u00e5ngsammare, och om tillst\u00e5ndet blir alldeles f\u00f6r allvarligt s\u00e5 d\u00f6r de, f\u00f6rklarar hon.<\/p>\n\n\n\n

Tillsammans med sina forskarkollegor har hon m\u00e4tt m\u00e4ngden syre och koldioxid i vattnet i sammanlagt 23 mangroveskogar v\u00e4rlden \u00f6ver. F\u00f6r att samla in datan har det kr\u00e4vts avancerad teknik, och en intensiv \u00f6vervakning. Utrustningen har beh\u00f6vt underh\u00e5llas med n\u00e5gra timmars mellanrum, i sv\u00e5r terr\u00e4ng med s\u00e5v\u00e4l krokodiler som meterh\u00f6ga tidvatten.<\/p>\n\n\n\n

– Bara att vi lyckats samlat in den h\u00e4r h\u00f6guppl\u00f6sta datan under l\u00e4ngre tidsperioder g\u00f6r studien unik, s\u00e4ger marinkemisten.<\/p>\n\n\n\n

Ett kritiskt tidsf\u00f6nster f\u00f6rsvinner<\/strong><\/h2>\n\n\n\n

Det \u00e4r tidvattnet som g\u00f6r att mangroven p\u00e5verkas mer av \u00f6kade koldioxidhalter \u00e4n andra havsmilj\u00f6er. D\u00e4r finns redan en naturlig syrebrist som intr\u00e4ffar n\u00e4r tidvattnet \u00e4r l\u00e5gt, och som bara de allra mest anpassade arterna klarar av. De andra, mer k\u00e4nsliga fiskarna, f\u00e5r ist\u00e4llet v\u00e4nta med att ta sig in i mangroven tills tidvattnet stiger och syrerikt vatten str\u00f6mmar in igen.<\/p>\n\n\n\n

Det \u00e4r ett avg\u00f6rande tidsf\u00f6nster f\u00f6r mycket av livet i skogarna. Men i takt med att haven blir varmare, och m\u00e4ngden koldioxid i atmosf\u00e4ren \u00f6kar, blir perioderna med extrem syrebrist och h\u00f6jda halter koldioxid allt l\u00e4ngre. <\/p>\n\n\n\n

– I vissa system kommer det h\u00e4r tidsf\u00f6nstret f\u00f6rsvinna helt, s\u00e4ger Gloria Reithmaier.<\/p>\n\n\n\n

Artrikaste skogarna drabbas h\u00e5rdast<\/strong><\/h2>\n\n\n\n

Studien har utg\u00e5tt fr\u00e5n olika klimatscenarier och tagit fram modeller f\u00f6r hur mangroveskogarna kommer att p\u00e5verkas vid olika grader av uppv\u00e4rmning. Redan idag s\u00e5g de att flera omr\u00e5den, framf\u00f6rallt de n\u00e4rmast ekvatorn, l\u00e5g \u00f6ver gr\u00e4nsen f\u00f6r n\u00e4r det blev sv\u00e5rt f\u00f6r fiskarna att andas under delar av dygnet.<\/p>\n\n\n\n

– De som drabbas v\u00e4rst \u00e4r ocks\u00e5 de system som \u00e4r mest v\u00e4rdefulla sett till biologisk m\u00e5ngfald. I Amazonas visade till exempel v\u00e5ra modeller att det h\u00e4r skadliga tillst\u00e5ndet i framtiden kommer att bli konstant, s\u00e4ger Gloria Reithmaier.<\/p>\n\n\n\n

Ekonomiska konsekvenser<\/strong><\/h2>\n\n\n\n

Idag \u00e4r det ungef\u00e4r 4 miljoner m\u00e4nniskor som \u00e4r beroende av mangroveskogarna f\u00f6r sin f\u00f6rs\u00f6rjning. De flesta av dem lever i utvecklingsl\u00e4nder och \u00e4gnar sig \u00e5t sm\u00e5skaligt fiske. En inkomst som riskerar att f\u00f6rsvinna om fisken i mangroven minskar.<\/p>\n\n\n\n

– Det \u00e4r framf\u00f6rallt fisken som vi \u00e4r mest intresserade av att \u00e4ta som kommer drabbas h\u00e5rdast, eftersom det \u00e4r den som \u00e4r mest k\u00e4nslig f\u00f6r den h\u00e4r f\u00f6r\u00e4ndrade vattenkvaliteten. S\u00e5 det kommer att f\u00e5 stora konsekvenser f\u00f6r m\u00e5nga m\u00e4nniskor, s\u00e4ger Gloria Reithmaier.\u00a0<\/p>\n\n\n\n

Minskade utsl\u00e4pp g\u00f6r skillnad<\/strong><\/h2>\n\n\n\n

Framf\u00f6rallt menar hon att fler fiskar kommer att bli upp\u00e4tna n\u00e4r de tvingas bort fr\u00e5n sin skyddade uppv\u00e4xtmilj\u00f6. Syrebristen d\u00f6dar dem inte, eftersom de kan simma iv\u00e4g n\u00e4r syret f\u00f6rsvinner. Men det finns ocks\u00e5 andra arter, s\u00e5som ostron, som inte har samma f\u00f6rm\u00e5ga att f\u00f6rflytta sig.<\/p>\n\n\n\n

– S\u00e5 klimatf\u00f6r\u00e4ndringarna kommer med st\u00f6rsta sannolikhet att leda till minskad biodiversitet i mangroven, s\u00e4ger hon.\u00a0\u00a0<\/p>\n\n\n\n

Samtidigt visade studien att utsikterna f\u00f6r livet i mangroven ser mycket olika ut beroende p\u00e5 vilket klimatscenario man utg\u00e5r ifr\u00e5n.<\/p>\n\n\n\n

– I de scenarier d\u00e4r vi verkligen g\u00f6r n\u00e5got \u00e5t klimatf\u00f6r\u00e4ndringarna nu, d\u00e4r alla bidrar och f\u00f6rs\u00f6ker minska utsl\u00e4ppen, blir effekterna faktiskt inte lika kraftiga, s\u00e4ger Gloria Reithmaier.<\/p>\n\n\n\n

Om Deep Sea Reporter: <\/strong>V\u00e5r ambition \u00e4r att granska och skildra fr\u00e5gor som r\u00f6r havet och det liv som finns under ytan. Vi verkar i allm\u00e4nhetens tj\u00e4nst och drivs sj\u00e4lvst\u00e4ndigt i f\u00f6rh\u00e5llande till politiska, kommersiella och andra intressen i samh\u00e4llet.<\/sup><\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

N\u00e4r haven v\u00e4rms upp blir det sv\u00e5rare f\u00f6r fiskar i mangroveskogarna att andas. Det visar en unik ny studie fr\u00e5n forskare vid G\u00f6teborgs universitet.<\/p>\n

– I vissa system kommer f\u00f6rh\u00e5llandena bli s\u00e5 extrema att bara de mest anpassade arterna klarar sig, s\u00e4ger studiens huvudf\u00f6rfattare, marinkemisten Gloria Reithmaier.<\/p>\n","protected":false},"author":4,"featured_media":42975,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[580,244],"tags":[1249,4391,2459,4392],"class_list":["post-42974","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-internationellt","category-klimat-och-miljo","tag-klimat-och-miljo","tag-mangroveskogar","tag-mangrovetrask","tag-okade-koldioxidhalter-i-havet"],"acf":[],"yoast_head":"\nSyrebrist hotar livet i v\u00e4rldens mangroveskogar - Deep Sea Reporter<\/title>\n<meta name=\"description\" content=\"N\u00e4r haven v\u00e4rms upp blir det sv\u00e5rare f\u00f6r fiskar i mangroveskogarna att andas. Det visar en unik ny studie fr\u00e5n forskare vid G\u00f6teborgs universitet.- I vissa system kommer f\u00f6rh\u00e5llandena bli s\u00e5 extrema att bara de mest anpassade arterna klarar sig, s\u00e4ger studiens huvudf\u00f6rfattare, marinkemisten Gloria Reithmaier.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Syrebrist hotar livet i v\u00e4rldens mangroveskogar - Deep Sea Reporter\" \/>\n<meta property=\"og:description\" content=\"N\u00e4r haven v\u00e4rms upp blir det sv\u00e5rare f\u00f6r fiskar i mangroveskogarna att andas. Det visar en unik ny studie fr\u00e5n forskare vid G\u00f6teborgs universitet.- I vissa system kommer f\u00f6rh\u00e5llandena bli s\u00e5 extrema att bara de mest anpassade arterna klarar sig, s\u00e4ger studiens huvudf\u00f6rfattare, marinkemisten Gloria Reithmaier.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/\" \/>\n<meta property=\"og:site_name\" content=\"Deep Sea Reporter\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-18T10:10:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-18T10:10:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/03\/P3-kopia.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1500\" \/>\n\t<meta property=\"og:image:height\" content=\"1125\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Lena Scherman\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Skriven av\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lena Scherman\" \/>\n\t<meta name=\"twitter:label2\" content=\"Ber\u00e4knad l\u00e4stid\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minuter\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/\"},\"author\":{\"name\":\"Lena Scherman\",\"@id\":\"https:\/\/www.deepseareporter.com\/#\/schema\/person\/8440c67b5dda5c5ae6c70162fedbd434\"},\"headline\":\"Syrebrist hotar livet i v\u00e4rldens mangroveskogar\",\"datePublished\":\"2026-03-18T10:10:17+00:00\",\"dateModified\":\"2026-03-18T10:10:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/\"},\"wordCount\":991,\"publisher\":{\"@id\":\"https:\/\/www.deepseareporter.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/03\/P3-kopia.jpeg\",\"keywords\":[\"klimat och milj\u00f6\",\"mangroveskogar\",\"mangrovetr\u00e4sk\",\"\u00f6kade koldioxidhalter i havet\"],\"articleSection\":[\"Internationellt\",\"Klimat och Milj\u00f6\"],\"inLanguage\":\"sv-SE\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/\",\"url\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/\",\"name\":\"Syrebrist hotar livet i v\u00e4rldens mangroveskogar - Deep Sea Reporter\",\"isPartOf\":{\"@id\":\"https:\/\/www.deepseareporter.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.deepseareporter.com\/sv\/syrebrist-hotar-livet-i-varldens-mangroveskogar\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.deepseareporter.com\/wp-content\/uploads\/2026\/03\/P3-kopia.jpeg\",\"datePublished\":\"2026-03-18T10:10:17+00:00\",\"dateModified\":\"2026-03-18T10:10:19+00:00\",\"description\":\"N\u00e4r haven v\u00e4rms upp blir det sv\u00e5rare f\u00f6r fiskar i mangroveskogarna att andas. 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