{"id":27034,"date":"2018-06-19T06:00:33","date_gmt":"2018-06-19T03:00:33","guid":{"rendered":"https:\/\/bilimvegelecek.com.tr\/?p=27034"},"modified":"2018-06-19T11:32:19","modified_gmt":"2018-06-19T08:32:19","slug":"afrikadaki-baobab-agaclari-oluyor-ve-hicbirimiz-nedenini-bilmiyoruz","status":"publish","type":"post","link":"https:\/\/bilimvegelecek.com.tr\/index.php\/2018\/06\/19\/afrikadaki-baobab-agaclari-oluyor-ve-hicbirimiz-nedenini-bilmiyoruz","title":{"rendered":"Afrika’daki baobab a\u011fa\u00e7lar\u0131 \u00f6l\u00fcyor ve hi\u00e7birimiz nedenini bilmiyoruz"},"content":{"rendered":"

Geride b\u0131rakt\u0131\u011f\u0131m\u0131z 13 y\u0131l, Afrika’n\u0131n eski yerle\u015fimcilerinden biri olan baobab a\u011fa\u00e7lar\u0131 i\u00e7in ger\u00e7ekten de \u00e7ok korkun\u00e7tu. Biliminsanlar\u0131n\u0131n 11 Haziran’da\u00a0Nature Plants<\/em>‘ta yay\u0131mlad\u0131klar\u0131 yeni bir makaleye g\u00f6re, en eski on \u00fc\u00e7 a\u011fa\u00e7tan dokuzu bin y\u0131ldan daha fazla bir s\u00fcrede beraber ya\u015fad\u0131ktan sonra ya g\u00f6vdelerini kaybetti ya da beraberce \u00f6ld\u00fc. Ama bu \u00f6nemli t\u00fcr\u00fc neyin \u00f6l\u00fcme s\u00fcr\u00fckledi\u011fi konusu ise hala tart\u0131\u015fmal\u0131.<\/p>\n

\u00c7al\u0131\u015fmay\u0131 d\u0131\u015far\u0131dan izleyen bitki bilimci Sarah Venter durumu \u015f\u00f6yle ele al\u0131yor: “Ya\u015fl\u0131 a\u011fa\u00e7lar\u0131n \u00f6l\u00fcm\u00fcnden ve y\u0131k\u0131lmas\u0131ndan dolay\u0131 \u00fcz\u00fcl\u00fcyor olsak da, mevcut bulgular g\u00f6z \u00f6n\u00fcne al\u0131nd\u0131\u011f\u0131nda bunun t\u00fcm a\u011fa\u00e7 n\u00fcfusunu etkiledi\u011fi s\u00f6ylenemez. Muhtemelen a\u011fa\u00e7lar \u00e7ok ya\u015fl\u0131 oldu\u011fu i\u00e7in kuru iklim ko\u015fullar\u0131na pek dayanamad\u0131. A\u011fa\u00e7lar\u0131n \u00f6l\u00fcmleri asl\u0131nda d\u00fc\u015f\u00fcnd\u00fc\u011f\u00fcm\u00fczden daha da karma\u015f\u0131k bir konu. \u00d6l\u00fcmlerin nedeni iklim de\u011fi\u015fikli\u011finden kurakl\u0131\u011fa kadar bir \u00e7ok \u015fey olabilir.”<\/p>\n

Baobab grubunun Adansonia digitata<\/em> t\u00fcrleri en uzun ya\u015fayan \u00e7i\u00e7ekli a\u011fa\u00e7 t\u00fcr\u00fcd\u00fcr. \u015ei\u015fman g\u00f6vdesi \u00fczerinde k\u00f6kler gibi g\u00f6r\u00fcnen, sarkan uzun s\u0131ska dallar\u0131 a\u011fac\u0131 sanki ba\u015f a\u015fa\u011f\u0131 olmu\u015f bir a\u011fa\u00e7 gibi g\u00f6r\u00fcnmesini sa\u011flar. Uzun g\u00f6vdeli, kahverengi meyveleri nedeniyle de “\u00f6l\u00fc fare a\u011fac\u0131” ad\u0131 ile de an\u0131l\u0131r. Yine de, insanlar uzun y\u0131llar boyunca baobab a\u011fa\u00e7lar\u0131 ile hem yeme ve ila\u00e7 ihtiya\u00e7lar\u0131n\u0131 kar\u015f\u0131lam\u0131\u015f hem de manevi de\u011ferler y\u00fckleyerek mistik bir boyuta ta\u015f\u0131m\u0131\u015ft\u0131r.<\/p>\n

Ekibin \u00fcyelerinden Adrian Patrut, 2005 y\u0131l\u0131ndan bu yana bilinen on \u00fc\u00e7\u00a0\u00a0A. digitata<\/em>‘dan d\u00f6rt tanesinin \u00f6ld\u00fc\u011f\u00fcn\u00fc s\u00f6yl\u00fcyor. Ayr\u0131ca, Patrut ve arkada\u015flar\u0131n\u0131n yay\u0131mlad\u0131klar\u0131 makaleye g\u00f6re, Afrika k\u0131tas\u0131ndaki di\u011fer be\u015f tarihi a\u011fa\u00e7, \u00e7oklu g\u00f6vdelerinin ger\u00e7ekten b\u00fcy\u00fck bir k\u0131sm\u0131n\u0131 kaybetmi\u015f bulunuyor.<\/p>\n

\u00d6len en ya\u015fl\u0131 a\u011fa\u00e7 Zimbabwe’deki Panke a\u011fac\u0131 idi. Bu a\u011fa\u00e7, 2010 ve 2011 y\u0131llar\u0131 aras\u0131nda par\u00e7alanmadan \u00f6nce yakla\u015f\u0131k 2,500 y\u0131l ya\u015fam\u0131\u015ft\u0131. Botswana’daki Chapman a\u011fac\u0131 da dahil olmak \u00fczere \u00f6len di\u011fer \u00fc\u00e7 ya\u015fl\u0131 a\u011fa\u00e7 sadece 1,250 ila 1,500 ya\u015flar\u0131ndayd\u0131.<\/p>\n

Patrut, bu \u00f6l\u00fcmlerin sadece ya\u015fl\u0131l\u0131ktan kaynaklan\u0131yor olabilece\u011fi d\u00fc\u015f\u00fcncesini pek do\u011fru bulmuyor. Bunun yerine daha can s\u0131k\u0131c\u0131 bir \u015fey olabilece\u011finden endi\u015feleniyor ve hastal\u0131k salg\u0131n\u0131na dair herhangi bir belirti olmad\u0131\u011f\u0131n\u0131n alt\u0131n\u0131 \u00e7iziyor. G\u00fcney Afrika’daki a\u015f\u0131r\u0131 \u0131s\u0131nman\u0131n bu \u00f6l\u00fcmlere yol a\u00e7m\u0131\u015f olabilece\u011fini \u015fiddetle savunuyor.<\/p>\n

Baobablar d\u00fcnyaca \u00fcnl\u00fc olarak, kurakl\u0131k biyolojisinin ve di\u011fer temel meselelerinin \u00e7o\u011fu gizemli kal\u0131yor. Ekolojist Eugene Moll: “Baobablar\u0131n k\u00f6klenme yap\u0131s\u0131n\u0131 ger\u00e7ekten bilen var m\u0131? 40 derece kuzeyinden gelen felsefeler ve paradigmalar, burada mutlaka G\u00fcney Yar\u0131mk\u00fcre’de ge\u00e7erli de\u011fil. Biz insanlar simetri gibiyiz ama tabiat kesinlikle her zaman simetrik de\u011fildir.” diyor.<\/p>\n","protected":false},"excerpt":{"rendered":"

Geride b\u0131rakt\u0131\u011f\u0131m\u0131z 13 y\u0131l, Afrika’n\u0131n eski yerle\u015fimcilerinden biri olan baobab a\u011fa\u00e7lar\u0131 i\u00e7in ger\u00e7ekten de \u00e7ok korkun\u00e7tu. Biliminsanlar\u0131n\u0131n 11 Haziran’da\u00a0Nature Plants‘ta yay\u0131mlad\u0131klar\u0131 yeni bir makaleye g\u00f6re, en eski on \u00fc\u00e7 a\u011fa\u00e7tan dokuzu bin y\u0131ldan daha fazla bir s\u00fcrede beraber ya\u015fad\u0131ktan sonra ya g\u00f6vdelerini kaybetti ya da beraberce \u00f6ld\u00fc. Ama bu \u00f6nemli t\u00fcr\u00fc neyin \u00f6l\u00fcme s\u00fcr\u00fckledi\u011fi konusu […]<\/p>\n","protected":false},"author":812,"featured_media":27036,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,21,217,1,23],"tags":[3531,3529,3528,309,3530],"class_list":["post-27034","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilim-gundemi","category-biyoloji","category-cevre-bilimleri","category-genel","category-iklim","tag-bitki-hastaliklari","tag-boabab","tag-boabab-agaci","tag-iklim-degisikligi","tag-kuresek-isinma"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t