{"id":12151,"date":"2024-10-29T23:53:54","date_gmt":"2024-10-29T23:53:54","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=12151"},"modified":"2024-10-29T23:53:54","modified_gmt":"2024-10-29T23:53:54","slug":"feathered-dinosaurs-fact-or-fiction","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/natural-history\/feathered-dinosaurs-fact-or-fiction\/","title":{"rendered":"Ope\u0159en\u00ed dinosau\u0159i: Fakt nebo fikce?"},"content":{"rendered":"

Pe\u0159\u00ed\u6050\u9f99: Fakt nebo fikce?<\/h2>\n\n

Vzestup teorie ope\u0159en\u00fdch dinosaur\u016f<\/h2>\n\n

Po cel\u00e1 desetilet\u00ed byli dinosau\u0159i zobrazov\u00e1ni jako \u0161upinat\u00e1, d\u011bsiv\u00e1 stvo\u0159en\u00ed. V posledn\u00edch dvou desetilet\u00edch v\u0161ak objev zkamen\u011bl\u00fdch dinosau\u0159\u00edch per zpochybnil tento tradi\u010dn\u00ed pohled. Vykop\u00e1vky v \u010c\u00edn\u011b a jinde odhalily zkamen\u011bl\u00e1 pera na r\u016fzn\u00fdch druz\u00edch dinosaur\u016f, v\u010detn\u011b t\u011bch, kter\u00e9 jsou \u00fazce p\u0159\u00edbuzn\u00e9 modern\u00edm pt\u00e1k\u016fm.<\/p>\n\n

Tato vlna d\u016fkaz\u016f vedla k roz\u0161\u00ed\u0159en\u00e9 v\u00ed\u0159e, \u017ee v\u0161ichni dinosau\u0159i m\u011bli pe\u0159\u00ed. Objev ope\u0159en\u00e9ho p\u0159edka v\u0161ech dinosaur\u016f v roce 2020 tuto teorii zd\u00e1nliv\u011b potvrdil.<\/p>\n\n

Zpochybn\u011bn\u00ed konsenzu ohledn\u011b pe\u0159\u00ed<\/h2>\n\n

Navzdory nad\u0161en\u00ed pro ope\u0159en\u00e9 dinosaury vyj\u00e1d\u0159ili dva paleontologov\u00e9, Paul Barrett a David Evans, pochybnosti o univerz\u00e1lnosti pe\u0159\u00ed mezi dinosaury. Jejich v\u00fdzkum, publikovan\u00fd v \u010dasopise Nature, analyzoval datab\u00e1zi otisk\u016f k\u016f\u017ee dinosaur\u016f, aby ur\u010dil v\u00fdskyt pe\u0159\u00ed a \u0161upin.<\/p>\n\n

Pe\u0159\u00ed u ornitischian\u016f a sauropod\u016f<\/h2>\n\n

Studie odhalila, \u017ee zat\u00edmco n\u011bkte\u0159\u00ed ornitischi\u00e1ni, jako nap\u0159\u00edklad Psittacosaurus, m\u011bli v k\u016f\u017ei brkovit\u00e9 struktury nebo vl\u00e1kna, v\u011bt\u0161ina vykazovala \u0161upiny nebo panc\u00ed\u0159. Podobn\u011b u sauropod\u016f, dlouhokrc\u00edch obr\u016f jako Brachiosaurus, byly \u0161upiny normou.<\/p>\n\n

\u0160upiny jako p\u016fvodn\u00ed stav<\/h2>\n\n

Barrett a Evans navrhuj\u00ed, \u017ee \u0161upiny byly p\u016fvodn\u00edm ko\u017en\u00edm pokryvem dinosaur\u016f a \u017ee schopnost vytv\u00e1\u0159et vl\u00e1kna a pe\u0159\u00ed se vyvinula pozd\u011bji v ur\u010dit\u00fdch lini\u00edch. Tvrd\u00ed, \u017ee a\u010dkoli pe\u0159\u00ed bylo u mnoha dinosaur\u016f jist\u011b p\u0159\u00edtomno, jeho roz\u0161\u00ed\u0159en\u00ed bylo zveli\u010deno.<\/p>\n\n

Redefinice ope\u0159en\u00fdch dinosaur\u016f<\/h2>\n\n

Zji\u0161t\u011bn\u00ed Barretta a Evanse nazna\u010duj\u00ed, \u017ee popul\u00e1rn\u00ed p\u0159edstava o v\u0161ech dinosaurech jako jednotn\u011b ope\u0159en\u00fdch m\u016f\u017ee b\u00fdt nep\u0159esn\u00e1. M\u00edsto toho mohla b\u00fdt pe\u0159\u00ed omezena na ur\u010dit\u00e9 skupiny dinosaur\u016f, zat\u00edmco \u0161upiny z\u016fstaly dominantn\u00edm ko\u017en\u00edm pokryvem pro v\u011bt\u0161inu.<\/p>\n\n

Implikace pro evoluci dinosaur\u016f<\/h2>\n\n

Debata o dinosaurech s pe\u0159\u00edm m\u00e1 d\u016fsledky pro na\u0161e ch\u00e1p\u00e1n\u00ed evoluce dinosaur\u016f. P\u0159\u00edtomnost \u0161upin u ur\u010dit\u00fdch skupin dinosaur\u016f nazna\u010duje, \u017ee p\u0159echod od \u0161upin k pe\u0159\u00ed nebyl jednoduch\u00fd, univerz\u00e1ln\u00ed proces. Je pravd\u011bpodobn\u00e9, \u017ee se r\u016fzn\u00e9 linie dinosaur\u016f vyvinuly v jedine\u010dn\u00e9 ko\u017en\u00ed pokryvy v reakci na sv\u00e1 specifick\u00e1 prost\u0159ed\u00ed a ekologick\u00e9 niky.<\/p>\n\n

Odhalen\u00ed tajemstv\u00ed<\/h2>\n\n

Objev ope\u0159en\u00fdch dinosaur\u016f zm\u011bnil na\u0161e ch\u00e1p\u00e1n\u00ed t\u011bchto prav\u011bk\u00fdch tvor\u016f. Debata o rozsahu roz\u0161\u00ed\u0159en\u00ed pe\u0159\u00ed mezi dinosaury v\u0161ak st\u00e1le prob\u00edh\u00e1. Dal\u0161\u00ed v\u00fdzkum a objevy n\u00e1m pomohou odhalit tajemstv\u00ed dinosau\u0159\u00ed k\u016f\u017ee a osv\u011btlit evolu\u010dn\u00ed vztahy mezi t\u011bmito fascinuj\u00edc\u00edmi tvory.<\/p>","protected":false},"excerpt":{"rendered":"

Pe\u0159\u00ed\u6050\u9f99: Fakt nebo fikce? Vzestup teorie ope\u0159en\u00fdch dinosaur\u016f Po cel\u00e1 desetilet\u00ed byli dinosau\u0159i zobrazov\u00e1ni jako \u0161upinat\u00e1, d\u011bsiv\u00e1 stvo\u0159en\u00ed. V posledn\u00edch dvou desetilet\u00edch v\u0161ak objev zkamen\u011bl\u00fdch dinosau\u0159\u00edch per zpochybnil tento tradi\u010dn\u00ed…<\/p>\n","protected":false},"author":2,"featured_media":24754,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[244],"tags":[134,136,137,1064,16420],"class_list":["post-12151","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-natural-history","tag-dinosaurs","tag-evolution","tag-paleontology","tag-feathers","tag-scales"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12151","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=12151"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12151\/revisions"}],"predecessor-version":[{"id":24755,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12151\/revisions\/24755"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/24754"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=12151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=12151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=12151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}