Bu acayip isimli birg\u00f6zeliler, iki bakmadan ilgi \u00e7ekicidir. \u00abForaminifer\u00bb lerin \u00f6zelliklerinin en ba\u015fta geleni tek h\u00fccreli v\u00fccutlar\u0131n\u0131n inan\u0131lmayacak derecede g\u00fczel ve tuhaf \u015fekilli olmas\u0131d\u0131r. Bu hayvanlar\u0131n, her biri \u00f6tekinden daha g\u00fczel, tam bin iki y\u00fcz \u00e7e\u015fidi vard\u0131r. \u00dcstelik \u00f6ylesine k\u00fc\u00e7\u00fckt\u00fcrler ki, mikroskopsuz asla incelenemez-ler. Ama bunlar\u0131 incelemek i\u00e7in ne kadar zaman harcasan\u0131z de\u011fer do\u011frusu… Foraminifer’lerin ikinci bir \u00f6zelli\u011fi de \u00e7ok eski jeolojik \u00e7a\u011flardan bu yana d\u00fcnyan\u0131n \u00e7e\u015fitli yerlerinde ya\u015fam\u0131\u015f olmalar\u0131 ve bundan milyonlarca y\u0131l \u00f6nce ya\u015fayan bu minik foraminifer iskeletlerinin yery\u00fcz\u00fcn\u00fcn manzaras\u0131na etki yapm\u0131\u015f bulunmas\u0131d\u0131r. Bunlar, kire\u00e7 ta\u015f\u0131ndan da\u011flar meydana getirmi\u015flerdir.
\nTuhaft\u0131r ama, daha da ileri giderek bug\u00fcnk\u00fc Paris \u015fehrinin foraminiferlerden meydana geldi\u011fini s\u00f6yleyece\u011fiz. \u015eehrin bulundu\u011fu b\u00f6lgede geni\u015f \u00f6l\u00e7\u00fcde kire\u00e7ta\u015f\u0131 yata\u011f\u0131 vard\u0131r. Bunlar hemen hemen tamamen bir foraminifer \u0131rk\u0131 olan \u00abmiliolina. n\u0131n kabuklar\u0131ndan meydana gelmi\u015ftir. Bu hayvanlar milyonlarca y\u0131l \u00f6nce ya\u015fam\u0131\u015flard\u0131r. \u0130\u015fte Paris’teki binalar\u0131n \u00e7o\u011fu bu kire\u00e7ta\u015f\u0131ndan yap\u0131lm\u0131\u015ft\u0131r. Basit bir b\u00fcy\u00fcte\u00e7le bak\u0131ld\u0131\u011f\u0131 zaman \u00bbmiliolina\u00bb kabuklar\u0131m kolayca g\u00f6rmek m\u00fcmk\u00fcn olur.
\nForaminifer’lerin \u00e7o\u011fu kendilerine silisyum, ya da kire\u00e7ta\u015fmdan bir kabuk yapar. Bu kabuklar\u0131n \u00fczerinde irili ufakl\u0131 bir\u00e7ok delik vard\u0131r. Hayvan, bu deliklerden yalanc\u0131 ayaklar\u0131n\u0131 d\u0131\u015far\u0131 \u00e7\u0131kar\u0131r. Bunun yalanc\u0131 ayaklan amip’lerinki gibi k\u00e2ba saba de\u011fildir. Aksine, ince, uzun ve \u00e7ok zariftir. Bazen bir yalanc\u0131 ayak bir\u00e7ok dallara ayr\u0131l\u0131r, bazen \u00f6r\u00fcmcek a\u011f\u0131 gibi bir \u015fekil bile ald\u0131\u011f\u0131 olur. B\u00fct\u00fcn bunlara ra\u011fmen kabu\u011fun i\u00e7inde tek bir par\u00e7ac\u0131k, protoplazmadan ibaret tek h\u00fccreli minik bir yarat\u0131k vard\u0131r.
\nForaminifer’lerin \u00e7o\u011fu okyanuslarda ya\u015far. Tatl\u0131 sularda ya\u015fayan \u00e7e\u015fitleri azd\u0131r. Pek az bir k\u0131sm\u0131 da rutubetli topraklarda ya\u015far. Okyanuslarda ya\u015fayan foraminifer’lerin \u00e7o\u011fu ya suyun y\u00fcz\u00fcnde, yahut da y\u00fcz\u00fcne yak\u0131n yerlerde bulunur. Bunlar \u00f6ld\u00fc\u011f\u00fc zaman kabuklar\u0131 okyanusun dibine \u00e7\u00f6ker ve dipte bir \u00e7amur tabakas\u0131 meydana getirir. Bir k\u0131s\u0131m foraminifer’ler de denizin dibinde ya\u015far. Bu \u015fekilde deniz dibinde ya\u015fayanlar\u0131n kabu\u011fu silisyumdand\u0131r.
\nForaminifer’lerin 500 000 000 y\u0131ldan beri yery\u00fcz\u00fcnde ya\u015fad\u0131\u011f\u0131 bilinmektedir. Bunlar\u0131n fosillerine d\u00fcnyan\u0131n her yan\u0131nda rastlanmakla beraber daha \u00e7ok kuzey yar\u0131mk\u00fcresinin \u0131l\u0131man b\u00f6lgelerinde rastlamak m\u00fcmk\u00fcnd\u00fcr. Eskiden ya\u015fam\u0131\u015f bulunan foraminifer’lerden \u00e7o\u011fu bug\u00fcnk\u00fclerden daha iriydi. Bir k\u0131sm\u0131 rahat\u00e7a g\u00f6zle g\u00f6r\u00fcl\u00fcp, ele al\u0131nacak b\u00fcy\u00fckl\u00fckteydi.
\nAncak as\u0131l \u00f6nemli olan onlar\u0131n b\u00fcy\u00fckl\u00fckleri de\u011fil, say\u0131lar\u0131n\u0131n \u00e7oklu\u011fudur. Bug\u00fcn d\u00fcnyadaki kire\u00e7ta\u015f\u0131 yataklar\u0131n\u0131 meydana getirmek i\u00e7in insan akl\u0131n\u0131n alamayaca\u011f\u0131 kadar \u00e7ok say\u0131da foraminifer’in birikmesi l\u00e2z\u0131md\u0131r. Bug\u00fcn ya\u015fayan foraminifer’ler de ayn\u0131 \u015fekilde say\u0131s\u0131zd\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":"
Bu acayip isimli birg\u00f6zeliler, iki bakmadan ilgi \u00e7ekicidir. \u00abForaminifer\u00bb lerin \u00f6zelliklerinin en ba\u015fta geleni tek h\u00fccreli v\u00fccutlar\u0131n\u0131n inan\u0131lmayacak derecede g\u00fczel ve tuhaf \u015fekilli olmas\u0131d\u0131r. Bu hayvanlar\u0131n, her biri \u00f6tekinden daha g\u00fczel, tam bin iki y\u00fcz \u00e7e\u015fidi vard\u0131r. \u00dcstelik \u00f6ylesine k\u00fc\u00e7\u00fckt\u00fcrler ki, mikroskopsuz asla incelenemez-ler. Ama bunlar\u0131 incelemek i\u00e7in ne kadar zaman harcasan\u0131z de\u011fer do\u011frusu… Foraminifer’lerin …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1407,1403],"tags":[6464,3350,6465,3602],"class_list":["post-2606","post","type-post","status-publish","format-standard","hentry","category-fen-ve-teknoloji-odevleri","category-odevler","tag-foraminifer-nedir","tag-mikroskop","tag-protoplazma","tag-silisyum"],"_links":{"self":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/2606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/comments?post=2606"}],"version-history":[{"count":0,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/2606\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/media?parent=2606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/categories?post=2606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/tags?post=2606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}