{"id":1103,"date":"2020-11-13T02:09:48","date_gmt":"2020-11-13T02:09:48","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=1103"},"modified":"2020-11-13T02:09:48","modified_gmt":"2020-11-13T02:09:48","slug":"snakes-evolutionary-explosion-rapid-diversification","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/evolutionary-biology\/snakes-evolutionary-explosion-rapid-diversification\/","title":{"rendered":"Hadi: evolu\u010dn\u00ed z\u00e1zrak"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Hadi: evolu\u010dn\u00ed z\u00e1zrak<\/h2>\n\n<h2 class=\"wp-block-heading\">Ran\u00e1 evolu\u010dn\u00ed exploze<\/h2>\n\n<p>Hadi, jak je zn\u00e1me dnes, jsou r\u016fznorodou skupinou plaz\u016f s jedine\u010dn\u00fdmi adaptacemi, kter\u00e9 je odli\u0161uj\u00ed od jejich je\u0161t\u011brkovit\u00fdch p\u0159edk\u016f. Tato evolu\u010dn\u00ed cesta za\u010dala p\u0159ed v\u00edce ne\u017e 150 miliony lety, kdy se n\u011bkte\u0159\u00ed je\u0161t\u011b\u0159i vydali na pozoruhodnou transformaci.<\/p>\n\n<h2 class=\"wp-block-heading\">Evolu\u010dn\u00ed singularita<\/h2>\n\n<p>P\u0159ed asi 125 miliony lety hadi za\u017eili \u201eevolu\u010dn\u00ed singularitu\u201c, obdob\u00ed urychlen\u00fdch evolu\u010dn\u00edch zm\u011bn. M\u00edsto postupn\u00e9 akumulace zm\u011bn hadi pro\u0161li \u0159adou rychl\u00fdch adaptac\u00ed, kter\u00e9 formovaly jejich charakteristick\u00e9 rysy.<\/p>\n\n<h2 class=\"wp-block-heading\">Kl\u00ed\u010dov\u00e9 adaptace<\/h2>\n\n<p>Evolu\u010dn\u00ed singularita p\u0159inesla n\u011bkolik d\u016fle\u017eit\u00fdch zm\u011bn v had\u00ed anatomii:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Pru\u017en\u00e9 lebky:<\/strong> Tato adaptace umo\u017enila had\u016fm polykat ko\u0159ist mnohem v\u011bt\u0161\u00ed, ne\u017e byly jejich hlavy.<\/li>\n<li><strong>Chemicky citliv\u00e9 jazyky:<\/strong> Hadi vyvinuli schopnost detekovat vzdu\u0161n\u00e9 chemik\u00e1lie, co\u017e zlep\u0161ilo jejich loveck\u00e9 schopnosti.<\/li>\n<li><strong>Ztr\u00e1ta kon\u010detin:<\/strong> Hadi ztratili sv\u00e9 kon\u010detiny, stali se ten\u010d\u00edmi a del\u0161\u00edmi, co\u017e jim poskytlo v\u011bt\u0161\u00ed agilitu v r\u016fzn\u00fdch ter\u00e9nech.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Potravinov\u00e1 specializace<\/h2>\n\n<p>Krom\u011b anatomick\u00fdch zm\u011bn hadi tak\u00e9 pro\u0161li v\u00fdznamnou potravinovou specializac\u00ed. Vyvinuli se tak, aby konzumovali ko\u0159ist, kter\u00e9 se jin\u00ed je\u0161t\u011b\u0159i vyh\u00fdbali, v\u010detn\u011b obratlovc\u016f a jedovat\u00fdch tvor\u016f. Tento posun ve strav\u011b p\u0159isp\u011bl k jejich \u00fasp\u011bchu a diverzifikaci.<\/p>\n\n<h2 class=\"wp-block-heading\">Evolu\u010dn\u00ed v\u00fdhody<\/h2>\n\n<p>Jedine\u010dn\u00e1 kombinace anatomick\u00fdch a potravinov\u00fdch adaptac\u00ed dala had\u016fm zna\u010dnou v\u00fdhodu oproti jin\u00fdm je\u0161t\u011br\u016fm. Jejich ohebn\u00e9 t\u011bla jim umo\u017enila p\u0159\u00edstup k nov\u00fdm biotop\u016fm, zat\u00edmco jejich chemicky citliv\u00e9 jazyky a specializovan\u00e1 strava roz\u0161\u00ed\u0159ila jejich zdroje potravy.<\/p>\n\n<h2 class=\"wp-block-heading\">Rychl\u00e9 evolu\u010dn\u00ed tempo<\/h2>\n\n<p>Hadi se vyv\u00edjeli asi t\u0159ikr\u00e1t rychleji ne\u017e sou\u010dasn\u00ed je\u0161t\u011b\u0159i. Toto rychl\u00e9 tempo evoluce jim umo\u017enilo diverzifikovat se do \u0161irok\u00e9 \u0161k\u00e1ly druh\u016f, kter\u00e9 obsazuj\u00ed rozmanit\u00e9 ekologick\u00e9 niky.<\/p>\n\n<h2 class=\"wp-block-heading\">Ekologick\u00fd dopad<\/h2>\n\n<p>Evolu\u010dn\u00ed exploze had\u016f m\u011bla z\u00e1sadn\u00ed dopad na ekosyst\u00e9my Zem\u011b. Jejich schopnost vyu\u017e\u00edvat nov\u00e9 zdroje potravy a biotopy p\u0159isp\u011bla k \u00fapadku n\u011bkter\u00fdch druh\u016f je\u0161t\u011br\u016f a ke vzniku nov\u00fdch ekologick\u00fdch vztah\u016f.<\/p>\n\n<h2 class=\"wp-block-heading\">Prob\u00edhaj\u00edc\u00ed v\u00fdzkum<\/h2>\n\n<p>P\u0159es zna\u010dn\u00fd pokrok v na\u0161em ch\u00e1p\u00e1n\u00ed evoluce had\u016f z\u016fst\u00e1v\u00e1 mnoho nezodpov\u011bzen\u00fdch ot\u00e1zek. V\u011bdci nad\u00e1le zkoumaj\u00ed p\u0159\u00ed\u010diny evolu\u010dn\u00ed singularity, roli environment\u00e1ln\u00edch zm\u011bn v evoluci had\u016f a cel\u00fd rozsah jejich potravinov\u00e9 specializace.<\/p>\n\n<h2 class=\"wp-block-heading\">V\u00fdznam<\/h2>\n\n<p>Studium evoluce had\u016f poskytuje cenn\u00e9 poznatky o pozoruhodn\u00e9 p\u0159izp\u016fsobivosti a rozmanitosti \u017eivota na Zemi. Zd\u016fraz\u0148uje s\u00edlu p\u0159irozen\u00e9ho v\u00fdb\u011bru p\u0159i \u0159\u00edzen\u00ed rychl\u00fdch a transforma\u010dn\u00edch zm\u011bn v reakci na m\u011bn\u00edc\u00ed se podm\u00ednky prost\u0159ed\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"<p>Hadi: evolu\u010dn\u00ed z\u00e1zrak Ran\u00e1 evolu\u010dn\u00ed exploze Hadi, jak je zn\u00e1me dnes, jsou r\u016fznorodou skupinou plaz\u016f s jedine\u010dn\u00fdmi adaptacemi, kter\u00e9 je odli\u0161uj\u00ed od jejich je\u0161t\u011brkovit\u00fdch p\u0159edk\u016f. Tato evolu\u010dn\u00ed cesta za\u010dala p\u0159ed&hellip;<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2547],"tags":[1647,395,219,136,2545,2546],"class_list":["post-1103","post","type-post","status-publish","format-standard","hentry","category-evolutionary-biology","tag-adaptation","tag-biodiversity","tag-ecology","tag-evolution","tag-snakes","tag-natural-selection"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1103","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=1103"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1103\/revisions"}],"predecessor-version":[{"id":1104,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1103\/revisions\/1104"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=1103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=1103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=1103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}