{"id":2279,"date":"2026-07-09T08:44:24","date_gmt":"2026-07-09T08:44:24","guid":{"rendered":"https:\/\/bimanset.com\/?p=2279"},"modified":"2026-07-09T08:44:25","modified_gmt":"2026-07-09T08:44:25","slug":"okyanusun-alacakaranlik-bolgesinde-her-gece-dunyanin-en-buyuk-gocu-yasaniyor","status":"publish","type":"post","link":"https:\/\/bimanset.com\/?p=2279","title":{"rendered":"Okyanusun alacakaranl\u0131k b\u00f6lgesinde, her gece d\u00fcnyan\u0131n en b\u00fcy\u00fck g\u00f6\u00e7\u00fc ya\u015fan\u0131yor…"},"content":{"rendered":"\n

G\u00fcne\u015fin etkisinin neredeyse tamamen kayboldu\u011fu okyanusun alacakaranl\u0131k b\u00f6lgesinde, her gece d\u00fcnyan\u0131n en b\u00fcy\u00fck g\u00f6\u00e7\u00fc ya\u015fan\u0131yor.<\/p>\n\n\n\n

Bu g\u00f6\u00e7\u00fcn varl\u0131\u011f\u0131, sonar teknisyenleri taraf\u0131ndan \u0130kinci D\u00fcnya Sava\u015f\u0131 s\u0131ras\u0131nda ke\u015ffedildi. Gemilerde kullan\u0131lan eko iskandillerinden g\u00f6nderilen ses sinyalleri, ara\u015ft\u0131rmac\u0131lara ilk ba\u015fta okyanus taban\u0131ndan yans\u0131yormu\u015f gibi g\u00f6r\u00fcnd\u00fc. Ancak yap\u0131lan \u00f6l\u00e7\u00fcmler, denizin beklenenden \u00e7ok daha s\u0131\u011f oldu\u011funu ortaya koydu. Deniz taban\u0131n\u0131n g\u00fcn boyunca d\u00fczenli olarak y\u00fckselip al\u00e7al\u0131yormu\u015f izlenimi vermesi de bilim insanlar\u0131n\u0131 \u015fa\u015f\u0131rtt\u0131. Hareket eden \u015feyin deniz taban\u0131 de\u011fil, “alacakaranl\u0131k ku\u015fa\u011f\u0131”nda ya\u015fayan canl\u0131lar\u0131n her gece beslenmek i\u00e7in y\u00fczeye do\u011fru ger\u00e7ekle\u015ftirdi\u011fi toplu g\u00f6\u00e7ten kaynakland\u0131\u011f\u0131 anla\u015f\u0131ld\u0131.<\/p>\n\n\n\n

Su s\u00fctunu i\u00e7inde yo\u011fun \u015fekilde bir araya gelen bu deniz canl\u0131lar\u0131n\u0131n olu\u015fturdu\u011fu ve “derin sa\u00e7\u0131lma katman\u0131” olarak adland\u0131r\u0131lan tabaka, ses dalgalar\u0131n\u0131 g\u00fc\u00e7l\u00fc bi\u00e7imde sa\u00e7\u0131yordu. Bu nedenle sonar sinyalleri, sanki kat\u0131 bir y\u00fczeye \u00e7arpm\u0131\u015f gibi geri yans\u0131yor ve ara\u015ft\u0131rmac\u0131lara deniz taban\u0131n\u0131 alg\u0131l\u0131yormu\u015f izlenimi veriyordu.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Yakla\u015f\u0131k 1000 metreye ula\u015f\u0131ld\u0131\u011f\u0131nda g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131 tamamen kayboluyor<\/h2>\n\n\n\n

Okyanus y\u00fczeyinin alt\u0131nda yer alan ve “alacakaranl\u0131k ku\u015fa\u011f\u0131” ya da mezopelajik b\u00f6lge olarak adland\u0131r\u0131lan katman, yakla\u015f\u0131k 200 metre derinlikte ba\u015fl\u0131yor. Bu noktadan itibaren g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131 giderek zay\u0131fl\u0131yor ve ortam s\u00fcrekli bir alacakaranl\u0131\u011fa b\u00fcr\u00fcn\u00fcyor. Derinlik artt\u0131k\u00e7a \u0131\u015f\u0131k h\u0131zla azal\u0131yor; yakla\u015f\u0131k 1000 metreye ula\u015f\u0131ld\u0131\u011f\u0131nda g\u00fcne\u015f tamamen kayboluyor. Bu derinliklerde g\u00f6r\u00fclebilen tek \u0131\u015f\u0131k kayna\u011f\u0131n\u0131, karanl\u0131kta \u0131\u015f\u0131k \u00fcretebilen canl\u0131lar\u0131n olu\u015fturdu\u011fu biyol\u00fcminesans par\u0131lt\u0131lar\u0131 olu\u015fturuyor.<\/p>\n\n\n\n

D\u00fcnya genelindeki okyanuslara yay\u0131lan bu dev su katman\u0131, zengin bir canl\u0131 \u00e7e\u015fitlili\u011fine ev sahipli\u011fi yap\u0131yor. D\u00fcnyadaki bal\u0131k biyok\u00fctlesinin yakla\u015f\u0131k y\u00fczde 95’i bu b\u00f6lgede bulunuyor.<\/p>\n\n\n\n

D\u00fcnya’daki en b\u00fcy\u00fck do\u011fal hayvan g\u00f6\u00e7\u00fc<\/h2>\n\n\n\n

Bu b\u00f6lgede ya\u015fayan trilyonlarca zooplankton, her gece karanl\u0131\u011f\u0131n sa\u011flad\u0131\u011f\u0131 korumadan yararlanarak beslenmek i\u00e7in derin sulardan y\u00fczeye do\u011fru \u00e7\u0131k\u0131yor. Bu olay, D\u00fcnya’daki en b\u00fcy\u00fck do\u011fal hayvan g\u00f6\u00e7\u00fc olarak g\u00f6r\u00fcl\u00fcyor. \u0130sko\u00e7 Deniz Bilimleri Derne\u011fi’nde Arktik Deniz Bilimleri alan\u0131nda \u00f6\u011fretim g\u00f6revlisi olan Laura Hobbs, bu hareketi “Meksika dalgas\u0131na” benzetiyor. Hobbs’a g\u00f6re, gecenin pe\u015finden ilerleyen trilyonlarca deniz canl\u0131s\u0131 okyanuslarda s\u00fcrekli y\u00fckselip al\u00e7alan dev bir dalga olu\u015fturuyor.<\/p>\n\n\n\n

Hobbs, zooplanktonlar\u0131n her gece y\u00fczeye \u00e7\u0131kmas\u0131n\u0131n temel nedeninin besin kaynaklar\u0131na ula\u015fmak oldu\u011funu s\u00f6yl\u00fcyor.<\/p>\n\n\n\n

“Zooplankton, okyanusta ya\u015fayan \u00e7ok say\u0131da farkl\u0131 k\u00fc\u00e7\u00fck hayvan t\u00fcr\u00fcn\u00fc kapsayan genel bir terim” diyen Hobbs, bu canl\u0131lar\u0131n birka\u00e7 milimetre uzunlu\u011funda oldu\u011funu belirtiyor. Buna ra\u011fmen her g\u00fcn y\u00fczlerce metre derine inip yeniden y\u00fczeye \u00e7\u0131kt\u0131klar\u0131n\u0131 ifade eden Hobbs, “Bu her g\u00fcn art arda birka\u00e7 maraton ko\u015fmaya benziyor” de\u011ferlendirmesinde bulunuyor.<\/p>\n\n\n\n

Zooplanktonlar\u0131n temel besin kayna\u011f\u0131n\u0131 bitkisel planktonlar olu\u015fturuyor. Hobbs’a g\u00f6re bitkisel planktonlar b\u00fcy\u00fcyebilmek i\u00e7in g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131na ihtiya\u00e7 duydu\u011fu i\u00e7in okyanusun yaln\u0131zca \u0131\u015f\u0131k alan y\u00fczey katmanlar\u0131nda ya\u015fayabiliyor. Bu nedenle zooplanktonlar da beslenebilmek i\u00e7in her gece derin sulardan y\u00fczeye do\u011fru g\u00f6\u00e7 ediyor.<\/p>\n\n\n\n

G\u00fcnl\u00fck g\u00f6\u00e7, her y\u0131l okyanusun \u00fcst katmanlar\u0131ndan derin denizlere yakla\u015f\u0131k 6 gigaton karbon ta\u015f\u0131nmas\u0131na neden oluyor. Bu miktar\u0131n, d\u00fcnya genelindeki t\u00fcm otomobillerin y\u0131ll\u0131k karbon emisyonunun iki kat\u0131ndan daha fazla oldu\u011fu d\u00fc\u015f\u00fcn\u00fcl\u00fcyor. Derin denizlere ta\u015f\u0131nan karbon, burada y\u00fczy\u0131llar boyunca depolanabiliyor.<\/p>\n\n\n\n

Ara\u015ft\u0131rmac\u0131lar, bu s\u00fcrecin atmosferden uzak tutulan karbon miktar\u0131n\u0131 art\u0131rarak D\u00fcnya’n\u0131n iklim sisteminin d\u00fczenlenmesinde \u00f6nemli bir rol oynad\u0131\u011f\u0131n\u0131 belirtiyor.<\/p>\n\n\n\n

\u00c7evresel bask\u0131lar giderek art\u0131yor<\/h2>\n\n\n\n

Karbon, okyanusta yakla\u015f\u0131k 1000 metre derinli\u011fin alt\u0131na indi\u011finde binlerce y\u0131l boyunca atmosfere kar\u0131\u015fmadan kalabiliyor. \u00d6te yandan alacakaranl\u0131k ku\u015fa\u011f\u0131ndaki canl\u0131lar, giderek artan \u00e7evresel bask\u0131larla da m\u00fccadele ediyor. Bilim insanlar\u0131na g\u00f6re iklim de\u011fi\u015fikli\u011fi nedeniyle deniz buzlar\u0131n\u0131n azalmas\u0131, g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131n\u0131n okyanusun daha derin katmanlar\u0131na ve daha uzun s\u00fcre ula\u015fmas\u0131na neden oluyor. Bu durum, karanl\u0131\u011f\u0131n \u00e7\u00f6kmesini bekleyen zooplanktonlar\u0131n daha uzun s\u00fcre derin sularda kalmas\u0131na yol a\u00e7\u0131yor.<\/p>\n\n\n\n

Okyanus sular\u0131n\u0131n \u0131s\u0131nmas\u0131 da bir\u00e7ok t\u00fcr\u00fcn ya\u015fam alanlar\u0131n\u0131n de\u011fi\u015fmesine neden olarak bu canl\u0131lara ba\u011fl\u0131 besin zincirlerini etkiliyor.<\/p>\n","protected":false},"excerpt":{"rendered":"

G\u00fcne\u015fin etkisinin neredeyse tamamen kayboldu\u011fu okyanusun alacakaranl\u0131k b\u00f6lgesinde, her gece d\u00fcnyan\u0131n en b\u00fcy\u00fck g\u00f6\u00e7\u00fc ya\u015fan\u0131yor. Bu g\u00f6\u00e7\u00fcn varl\u0131\u011f\u0131, sonar teknisyenleri taraf\u0131ndan \u0130kinci D\u00fcnya Sava\u015f\u0131 s\u0131ras\u0131nda ke\u015ffedildi. Gemilerde kullan\u0131lan eko iskandillerinden g\u00f6nderilen ses sinyalleri, ara\u015ft\u0131rmac\u0131lara ilk ba\u015fta okyanus taban\u0131ndan yans\u0131yormu\u015f gibi g\u00f6r\u00fcnd\u00fc. Ancak yap\u0131lan \u00f6l\u00e7\u00fcmler, denizin beklenenden \u00e7ok daha s\u0131\u011f oldu\u011funu ortaya koydu. Deniz taban\u0131n\u0131n g\u00fcn<\/p>\n","protected":false},"author":1,"featured_media":2280,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[752,751],"class_list":["post-2279","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aktuel","tag-her-gece-dunyanin-en-buyuk-gocu","tag-okyanusun-alacakaranlik-bolgesinde"],"acf":[],"_links":{"self":[{"href":"https:\/\/bimanset.com\/index.php?rest_route=\/wp\/v2\/posts\/2279","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bimanset.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bimanset.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bimanset.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bimanset.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2279"}],"version-history":[{"count":1,"href":"https:\/\/bimanset.com\/index.php?rest_route=\/wp\/v2\/posts\/2279\/revisions"}],"predecessor-version":[{"id":2282,"href":"https:\/\/bimanset.com\/index.php?rest_route=\/wp\/v2\/posts\/2279\/revisions\/2282"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bimanset.com\/index.php?rest_route=\/wp\/v2\/media\/2280"}],"wp:attachment":[{"href":"https:\/\/bimanset.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bimanset.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bimanset.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}