{"id":26873,"date":"2023-01-19T15:46:54","date_gmt":"2023-01-19T14:46:54","guid":{"rendered":"https:\/\/deepseareporter.dev.phosdev.se\/?p=26873"},"modified":"2023-11-23T17:13:48","modified_gmt":"2023-11-23T16:13:48","slug":"invasiva-arter-del-1-drakfisken","status":"publish","type":"post","link":"https:\/\/deepseareporter.dev.phosdev.se\/sv\/invasiva-arter-del-1-drakfisken\/","title":{"rendered":"Invasiva arter: Del 1 &#8211; Drakfisken"},"content":{"rendered":"\n<p>Det troligaste \u00e4r att den vackra drakfisken spreds till havet utanf\u00f6r Floridas kust n\u00e4r ett akvarium krossades under orkanen Andrews h\u00e4rjningar f\u00f6r trettio \u00e5r sedan, skriver den amerikanska havsmyndigheten NOAA. Nu \u00e4r drakfisken helt dominerande l\u00e4ngs USA:s kuster och konkurrerar ut andra arter i ekosystemet.<\/p>\n\n\n\n<p>Och kanske var det just s\u00e5 som drakfisken spreds, men den vanliga v\u00e4gen n\u00e4r arter sprids \u00e4r att de f\u00f6ljer med barlasten i handelsfartyg. I dag \u00e4r det enorma volymer barlastvatten som transporteras mellan v\u00e4rldens hamnar, upp till fyra miljarder ton vatten sl\u00e4pas p\u00e5 det s\u00e4ttet runt v\u00e4rlden varje \u00e5r.<\/p>\n\n\n\n<p>Fartyg som inte \u00e4r fullastade m\u00e5ste stabiliseras. F\u00f6rr skedde det med sten eller sand, nu stabiliserar man med vatten i tankarna. Vatten som pumpas in n\u00e4r man lastat av, och sen t\u00f6ms ut i n\u00e4sta hamn n\u00e4r man fyller p\u00e5 med nytt gods.<\/p>\n\n\n\n<p>Med vattnet f\u00f6ljer fripassagerare i form av djur, v\u00e4xter, \u00e4gg, larver och mikroorganismer. De flesta d\u00f6r i de m\u00f6rka, ofta giftiga utrymmena, andra d\u00f6r direkt i den nya milj\u00f6n. Men n\u00e5gra klarar sig och n\u00e5gra av dem blir vad man kallar invasiva. Det vill s\u00e4ga &#8211; de st\u00e4ller till med rej\u00e4l skada i ekosystemen d\u00e4r de sprider sig.<\/p>\n\n\n\n<p>Det finns inget riktigt bra system f\u00f6r att stoppa invasiva arter. D\u00e4rf\u00f6r v\u00e4xer problemen med en alarmerande hastighet. Just nu etablerar sig en ny art n\u00e5gonstans i v\u00e4rlden varannan m\u00e5nad.<\/p>\n\n\n\n<p>F\u00f6r att f\u00e5 bukt p\u00e5 den invasiva drakfisken har man p\u00e5 f\u00f6rs\u00f6k tr\u00e4nat upp hajar som ska \u00e4ta upp dem. Det har inte varit n\u00e5gon framkomlig v\u00e4g. \u00d6ver huvud taget har det visat sig sv\u00e5rt att stoppa invasiva arter genom att inf\u00f6ra andra arter som ska d\u00f6da eller f\u00f6rst\u00f6ra dem. Helt enkelt d\u00e4rf\u00f6r att konsekvenserna \u00e4r f\u00f6r sv\u00e5ra att kontrollera. Det kan g\u00e5 bra, men det kan ocks\u00e5 g\u00e5 v\u00e4ldigt illa.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Det troligaste \u00e4r att den vackra drakfisken spreds till havet utanf\u00f6r Floridas kust n\u00e4r ett akvarium krossades under orkanen Andrews h\u00e4rjningar f\u00f6r trettio \u00e5r sedan, skriver den amerikanska havsmyndigheten NOAA. Nu \u00e4r drakfisken helt dominerande l\u00e4ngs USA:s kuster och konkurrerar ut andra arter i ekosystemet. Och kanske var det just s\u00e5 som drakfisken spreds, men [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":29009,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[244],"tags":[1134,1131,1133,867,1132],"class_list":["post-26873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-klimat-och-miljo","tag-akvariefisk","tag-drakfisk","tag-giftig-fisk","tag-invasiva-arter","tag-lionfish"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Invasiva arter: Del 1 - Drakfisken - Deep Sea Reporter<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"sv_SE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Invasiva arter: Del 1 - Drakfisken - Deep Sea Reporter\" \/>\n<meta property=\"og:description\" content=\"Det troligaste \u00e4r att den vackra drakfisken spreds till havet utanf\u00f6r Floridas kust n\u00e4r ett akvarium krossades under orkanen Andrews h\u00e4rjningar f\u00f6r trettio \u00e5r sedan, skriver den amerikanska havsmyndigheten NOAA. 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