Ara\u015ft\u0131rmac\u0131lar, \u0131s\u0131nan sular\u0131n deniz ekosistemleri ve bu ekosistemlere ba\u011f\u0131ml\u0131 insanlar\u0131n ge\u00e7im kaynaklar\u0131n\u0131 kitlesel yok olu\u015f ile tehdit ederek binlerce okyanus canl\u0131s\u0131n\u0131n ekvatordan kutuplara do\u011fru g\u00f6\u00e7\u00fcne neden oldu\u011funu bildirdi.<\/p>\n\n\n\n

PNAS dergisinde yay\u0131mlanan \u00e7al\u0131\u015fmaya g\u00f6re, 2015 y\u0131l\u0131na kadar 20 y\u0131ll\u0131k \u00fc\u00e7 d\u00f6nem boyunca yakla\u015f\u0131k 50.000 t\u00fcre ili\u015fkin verilerin kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131 ile tropikal sulardan g\u00f6\u00e7\u00fcn h\u0131zland\u0131\u011f\u0131 ortaya koyuldu.<\/p>\n\n\n\n

Tropik b\u00f6lgeler uzun s\u00fcredir deniz ya\u015fam\u0131n\u0131n son derece b\u00fcy\u00fck bir b\u00f6l\u00fcm\u00fcne ev sahipli\u011fi yap\u0131yor, ancak ara\u015ft\u0131rmac\u0131lar iklim de\u011fi\u015fikli\u011fi kontrol alt\u0131na al\u0131nmazsa \u00e7e\u015fitlili\u011fin ortadan kalkaca\u011f\u0131 konusunda uyar\u0131yor.<\/p>\n\n\n\n

Auckland \u00dcniversitesi’nde deniz biyolojisi profes\u00f6r\u00fc olan deneyimli yazar Mark Costello AFP’ye verdi\u011fi deme\u00e7te, “K\u00fcresel \u0131s\u0131nma okyanus ya\u015fam\u0131n\u0131 en az\u0131ndan 60 y\u0131ld\u0131r de\u011fi\u015ftiriyor.<\/p>\n\n\n\n

Elde etti\u011fimiz bulgular, ekvatorda ya\u015fayan t\u00fcrlerde 1.500\u2019e yak\u0131n bir d\u00fc\u015f\u00fc\u015f oldu\u011funu g\u00f6steriyor. Bu durum i\u00e7inde bulundu\u011fumuz y\u00fczy\u0131l boyunca devam edecek ve bunun olma h\u0131z\u0131 sera gaz\u0131 emisyonlar\u0131n\u0131 d\u00fc\u015f\u00fcrebilmemize\u2014ya da d\u00fc\u015f\u00fcremememize\u2014ba\u011fl\u0131 olacak,\u201d dedi.<\/p>\n\n\n\n

Okyanuslar\u0131n g\u00fcney yar\u0131mk\u00fcreden daha h\u0131zl\u0131 \u0131s\u0131nd\u0131\u011f\u0131 ekvatorun kuzey b\u00f6lgelerinde kutuplara do\u011fru g\u00f6\u00e7 daha belirgin hale geldi.<\/p>\n\n\n\n

Ayr\u0131ca, okyanus taban\u0131nda ya\u015fayan bentik ad\u0131 verilen t\u00fcrlere k\u0131yasla a\u00e7\u0131k deniz bal\u0131klar\u0131 aras\u0131nda bu durum daha yayg\u0131nd\u0131.<\/p>\n\n\n\n

Costello, \u201cBentik t\u00fcrler yaln\u0131zca y\u00fczebildikleri ya\u015fam evrelerinde hareket edebilirler ve bu nedenle ge\u00e7i\u015fleri (kutba do\u011fru) nesiller aras\u0131d\u0131r.<\/p>\n\n\n\n

Buna kar\u015f\u0131l\u0131k, a\u00e7\u0131k denizlerde ya\u015fayan t\u00fcrler ya\u015famlar\u0131 boyunca su k\u00fctleleri ile birlikte hareket edebilirler,\u201d dedi.<\/p>\n\n\n\n

Ara\u015ft\u0131rmaya g\u00f6re, tropikal sulardaki deniz ya\u015fam\u0131, y\u0131ll\u0131k ortalama deniz s\u0131cakl\u0131\u011f\u0131 20 ile 25 santigrat derecenin \u00fczerine \u00e7\u0131kt\u0131\u011f\u0131nda t\u00fcre ba\u011fl\u0131 olarak azal\u0131yor.<\/p>\n\n\n\n

2050\u2019ye kadar %40 d\u00fc\u015f\u00fc\u015f<\/h3>\n\n\n\n

G\u00fcney Afrika, Port Elizabeth’te bulunan Nelson Mandela \u00dcniversitesi’nde ekoloji profes\u00f6r\u00fc olan \u00e7al\u0131\u015fman\u0131n di\u011fer yazar\u0131 David Schoeman, “‘Kay\u0131p’ tropikal t\u00fcrler muhtemelen subtropikal sular \u0131s\u0131nd\u0131k\u00e7a termal ya\u015fam alanlar\u0131n\u0131 takip ediyorlar,” dedi.<\/p>\n\n\n\n

Fosil kay\u0131tlar\u0131, bir \u00f6nceki kitlesel yok olu\u015f olay\u0131n\u0131n 140bin y\u0131l \u00f6nce, k\u00fcresel y\u00fczey s\u0131cakl\u0131klar\u0131n\u0131n \u015fu anki kadar s\u0131cak oldu\u011fu en son zamanda ger\u00e7ekle\u015fti\u011fini g\u00f6steriyor.<\/p>\n\n\n\n

Eri\u015fime a\u00e7\u0131k Okyanus Biyo\u00e7e\u015fitlili\u011fi Bilgi Sistemindeki verilere dayanan istatistiksel \u00e7al\u0131\u015fma, bireysel t\u00fcrlerin yeni ortamlara nas\u0131l adapte olaca\u011f\u0131n\u0131 ele alm\u0131yor.<\/p>\n\n\n\n

Genel anlamda, daha \u00f6nceki \u00e7al\u0131\u015fmalarda g\u00f6r\u00fcld\u00fc\u011f\u00fc \u00fczere a\u00e7\u0131k deniz t\u00fcrlerinin daha iyi sonu\u00e7 vermesi muhtemel.<\/p>\n\n\n\n

\u00c7al\u0131\u015fma, tropikal b\u00f6lgelerdeki ticari bal\u0131k stoklar\u0131 \u00fczerindeki etkiye de de\u011finmiyor, ama d\u00fcnyan\u0131n hangi b\u00f6lgelerinin en \u00e7ok etkilenece\u011fi a\u00e7\u0131k\u00e7a g\u00f6r\u00fcl\u00fcyor.<\/p>\n\n\n\n

Costello, “Endonezya ve Bat\u0131 Afrika gibi ekvatora yak\u0131n di\u011fer \u00fclkeler en \u00e7ok kaybedecek \u00fclkeler aras\u0131nda, \u00e7\u00fcnk\u00fc stoklar\u0131 sadece azalabilir,” \u00e7\u00fcnk\u00fc gidenlerin yerini hi\u00e7bir yeni t\u00fcr alamayacak.<\/p>\n\n\n\n

D\u00fcnya \u00e7ap\u0131nda yakla\u015f\u0131k 1,3 milyar insan tropikal k\u0131y\u0131 b\u00f6lgelerinde ya\u015f\u0131yor ve bunlar\u0131n \u00e7o\u011fu g\u0131da i\u00e7in bal\u0131k\u00e7\u0131l\u0131\u011fa ba\u011f\u0131ml\u0131.<\/p>\n\n\n\n

Nature dergisinde k\u0131sa s\u00fcre \u00f6nce yay\u0131mlanan bir inceleme makalesi, k\u00fcresel \u0131s\u0131nma h\u0131z kesmeden devam ederse, k\u0131y\u0131dan 200 deniz mili (370km) uzakl\u0131kta olan s\u00f6zde m\u00fcnhas\u0131r ekonomik b\u00f6lgelerdeki tropikal bal\u0131k stoklar\u0131n\u0131n maksimum yakalama potansiyelinin y\u00fczy\u0131l\u0131n ortas\u0131na kadar y\u00fczde 40 azalaca\u011f\u0131n\u0131 \u00f6ng\u00f6r\u00fcyor.<\/p>\n\n\n\n

Pasifik ada \u00fclkelerinin \u00e7o\u011funda, en \u00e7ok ihra\u00e7 edilen iki bal\u0131k olan yaz\u0131l\u0131 orkinos ve sar\u0131kanat orkinos av\u0131 ayn\u0131 senaryo \u00e7er\u00e7evesinde y\u00fczde 40’a kadar d\u00fc\u015ferken, yerel olarak t\u00fcketilen mercan resif bal\u0131\u011f\u0131 daha da azalabilir.<\/p>\n\n\n\n

PNAS sisteminde yer alan \u00e7al\u0131\u015fma, Chhaya Chaudhary’nin Auckland \u00dcniversitesi doktora tezi ile ba\u015flam\u0131\u015ft\u0131r. <\/p>\n\n\n\n

Referans<\/strong>:<\/p>\n\n\n\n

Chhaya Chaudhary vd., “Global warming is causing a more pronounced dip in marine species richness around the equator,” PNAS (2021). www.pnas.org\/cgi\/doi\/10.1073\/pnas.2015094118<\/a><\/p>\n\n\n\n

Kaynak<\/strong>: https:\/\/www.scientiststudy.com\/<\/a><\/p>\n\n\n\n

Translated by<\/strong> Oytun Buyruk\u00e7u<\/a><\/p>\n\n\n\n

Native Turkish Translator | SEO & Localization Expert | Proofreader<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Ara\u015ft\u0131rmac\u0131lar, \u0131s\u0131nan sular\u0131n deniz ekosistemleri ve bu ekosistemlere ba\u011f\u0131ml\u0131 insanlar\u0131n ge\u00e7im kaynaklar\u0131n\u0131 kitlesel yok olu\u015f ile tehdit ederek binlerce okyanus canl\u0131s\u0131n\u0131n ekvatordan kutuplara do\u011fru g\u00f6\u00e7\u00fcne…<\/p>\n","protected":false},"author":1,"featured_media":1088,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[74,660],"class_list":["post-1087","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cevre","tag-iklim-degisikligi","tag-kitlesel-yok-olus","wpcat-38-id"],"yoast_head":"\n