{"id":58873,"date":"2021-06-05T20:50:00","date_gmt":"2021-06-05T17:50:00","guid":{"rendered":"http:\/\/life.karpat.in.ua\/?p=58873"},"modified":"2021-06-05T19:40:10","modified_gmt":"2021-06-05T16:40:10","slug":"mar-nem-jut-eleg-oxigen-a-halaknak-a-tavakban","status":"publish","type":"post","link":"https:\/\/life.karpat.in.ua\/?p=58873&lang=hu","title":{"rendered":"M\u00e1r nem jut el\u00e9g oxig\u00e9n a halaknak a tavakban"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>T\u00f6bb sz\u00e1z t\u00f3 viz\u00e9nek oxig\u00e9nszintje cs\u00f6kkent az elm\u00falt n\u00e9gy \u00e9vtizedben az Egyes\u00fclt \u00c1llamokban \u00e9s Eur\u00f3p\u00e1ban \u2013 figyelmeztetnek kutat\u00f3k, akik szerint a fogyatkoz\u00f3 oxig\u00e9nszint fokozott halpusztul\u00e1st, algavir\u00e1gz\u00e1st \u00e9s met\u00e1nkibocs\u00e1t\u00e1st eredm\u00e9nyezhet.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Nature c\u00edm\u0171 foly\u00f3iratban publik\u00e1lt tanulm\u00e1ny k\u00e9sz\u00edt\u0151i csaknem 400 t\u00f3 v\u00edz\u00e9nek h\u0151m\u00e9rs\u00e9klet\u00e9t \u00e9s oldott oxig\u00e9nszintj\u00e9t elemezt\u00e9k. Meg\u00e1llap\u00edtott\u00e1k, hogy a vizsg\u00e1lt tavak felsz\u00edni vizeiben \u00e1tlagosan 5,5 sz\u00e1zal\u00e9kkal, a m\u00e9lyebb vizekben 18,6 sz\u00e1zal\u00e9kkal cs\u00f6kkent az oldott oxig\u00e9nszintje.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"746\" height=\"497\" src=\"http:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/06\/to-viz.jpg\" alt=\"\" class=\"wp-image-58874\" srcset=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/06\/to-viz.jpg 746w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/06\/to-viz-300x200.jpg 300w\" sizes=\"auto, (max-width: 746px) 100vw, 746px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Craig E. Williamson, az ohi\u00f3i Miami Egyetem biol\u00f3giaprofesszora, a tanulm\u00e1ny t\u00e1rsszerz\u0151je szerint az eredm\u00e9nyeik azt sugallj\u00e1k, hogy az \u00e9ghajlatv\u00e1ltoz\u00e1s okozta meleged\u00e9s \u00e9s az emberi tev\u00e9kenys\u00e9gek miatt egyre cs\u00f6kken\u0151 v\u00edztisztas\u00e1g az oka az oxig\u00e9nszint fogyatkoz\u00e1s\u00e1nak.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00edzoszlop t\u00f6r a magasba a Genfi-t\u00f3 ikonikus sz\u00f6k\u0151k\u00fatj\u00e1b\u00f3l Genfben 2020. j\u00fanius 11-\u00e9n. Az \u00e9jszak\u00e1nk\u00e9nt kivil\u00e1g\u00edtott sz\u00f6k\u0151kutat a koronav\u00edrus-j\u00e1rv\u00e1ny miatt hozott int\u00e9zked\u00e9sek enyh\u00edt\u00e9sek\u00e9nt \u00fcnneps\u00e9g keret\u00e9ben ind\u00edtott\u00e1k \u00fajra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A m\u00e9lyebb vizek oxig\u00e9nszintj\u00e9nek cs\u00f6kken\u00e9se komoly fenyeget\u00e9st jelent az olyan v\u00edzi \u00e9l\u0151l\u00e9nyekre, amelyek \u00e9rz\u00e9kenyebbek a h\u0151m\u00e9rs\u00e9klet emelked\u00e9s\u00e9re, mint p\u00e9ld\u00e1ul a hidegv\u00edzi halak.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A ny\u00e1ri h\u00f3napokban ezek a teremtm\u00e9nyek a h\u0171v\u00f6sebb m\u00e9lyebb vizekbe vonulnak vissza, \u00e1m ha ezek oxig\u00e9nben szeg\u00e9nyek, akkor a halak nem maradnak \u00e9letben.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"810\" height=\"381\" src=\"http:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/06\/tavak.jpg\" alt=\"\" class=\"wp-image-58875\" srcset=\"https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/06\/tavak.jpg 810w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/06\/tavak-300x141.jpg 300w, https:\/\/life.karpat.in.ua\/wp-content\/uploads\/2021\/06\/tavak-768x361.jpg 768w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">A vizsg\u00e1lt tavak nagyj\u00e1b\u00f3l negyed\u00e9n\u00e9l a felsz\u00edni vizek oxig\u00e9nszintj\u00e9nek emelked\u00e9s\u00e9t \u00e9szlelt\u00e9k a kutat\u00f3k, ami ugyancsak rossz jel, mert val\u00f3sz\u00edn\u0171leg fokozott algavir\u00e1gz\u00e1ssal van \u00f6sszef\u00fcgg\u00e9sben. Ezekben a tavakban a m\u00e9lyebb vizek oldottoxig\u00e9n-szintje \u201enagyon alacsony\u201d, sok faj sz\u00e1m\u00e1ra lakhatatlan volt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kutat\u00e1sok szerint az ilyen oxig\u00e9nhi\u00e1nyos tavakban az \u00fcled\u00e9kb\u0151l met\u00e1n sziv\u00e1rog.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A tanulm\u00e1ny az eur\u00f3pai \u00e9s amerikai tavak mellett egy jap\u00e1n, valamint n\u00e9h\u00e1ny \u00faj-z\u00e9landi t\u00f3ra is kiterjedt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A szakemberek szerint val\u00f3sz\u00edn\u0171leg a vil\u00e1g m\u00e1s tavaiban is cs\u00f6kken az oldott oxig\u00e9n szintje, aminek az az oka, hogy az \u00e9ghajlatv\u00e1ltoz\u00e1s okozta meleged\u00e9s miatt cs\u00f6kken az oxig\u00e9n v\u00edzoldhat\u00f3s\u00e1ga.<\/p>\n\n\n\n<p class=\"has-text-align-right wp-block-paragraph\"><strong><a href=\"https:\/\/magyarnemzet.hu\/mozaik\/csokken-az-amerikai-es-europai-tavak-vizenek-oxigenszintje-9887900\/?utm_source=rss\" target=\"_blank\" rel=\"noreferrer noopener\">(magyarnemzet.hu)<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u00f6bb sz\u00e1z t\u00f3 viz\u00e9nek oxig\u00e9nszintje cs\u00f6kkent az elm\u00falt n\u00e9gy \u00e9vtizedben az Egyes\u00fclt \u00c1llamokban \u00e9s Eur\u00f3p\u00e1ban \u2013 figyelmeztetnek kutat\u00f3k, akik szerint a fogyatkoz\u00f3 oxig\u00e9nszint fokozott halpusztul\u00e1st, algavir\u00e1gz\u00e1st \u00e9s met\u00e1nkibocs\u00e1t\u00e1st eredm\u00e9nyezhet.<\/p>\n","protected":false},"author":12,"featured_media":58875,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41,49,592,598],"tags":[53209,53208,27719,8329],"class_list":["post-58873","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cikkek","category-hirek","category-tarsadalom","category-tudomany","tag-ellatottsag","tag-halak","tag-oxigen","tag-tavak"],"_links":{"self":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/58873","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=58873"}],"version-history":[{"count":0,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/58873\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/media\/58875"}],"wp:attachment":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=58873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=58873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=58873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}