Strom Jozue, ikonick\u00fd obyvatel Mohavsk\u00e9 pou\u0161t\u011b, je pro sv\u00e9 p\u0159e\u017eit\u00ed z\u00e1visl\u00fd na m\u016f\u0159e jukov\u00e9. Tento jedine\u010dn\u00fd opylovac\u00ed vztah se vyv\u00edjel miliony let a vytvo\u0159il fascinuj\u00edc\u00ed p\u0159\u00edklad koevoluce.<\/p>\n\n
Bez nektaru, kter\u00fd by l\u00e1kal opylova\u010de, jsou stromy Jozue zcela z\u00e1visl\u00e9 na m\u016f\u0159e jukov\u00e9, aby p\u0159enesla pyl mezi jejich kv\u011bty. Specializovan\u00e1 \u00fastn\u00ed \u00fastroj\u00ed m\u016fry j\u00ed umo\u017e\u0148uj\u00ed sb\u00edrat pyl a ukl\u00e1dat jej na sami\u010d\u00ed \u010d\u00e1sti ka\u017ed\u00e9ho kv\u011btu, \u010d\u00edm\u017e zaji\u0161\u0165uje opylen\u00ed.<\/p>\n\n
Na opl\u00e1tku m\u016fra klade vaj\u00ed\u010dka na semena kv\u011btu. Kdy\u017e se vaj\u00ed\u010dka vyl\u00edhnou, housenky m\u016fry jukov\u00e9 se \u017eiv\u00ed semeny, sv\u00fdm jedin\u00fdm zdrojem potravy. Tento vz\u00e1jemn\u011b prosp\u011b\u0161n\u00fd vztah umo\u017enil ob\u011bma druh\u016fm prosperovat v drsn\u00e9m pou\u0161tn\u00edm prost\u0159ed\u00ed.<\/p>\n\n
Existuj\u00ed dva odli\u0161n\u00e9 druhy strom\u016f Jozue, rozd\u011blen\u00e9 pou\u0161t\u00ed Amargosa. V\u011bdci zjistili, \u017ee ka\u017ed\u00fd druh stromu je opylov\u00e1n konkr\u00e9tn\u00edm druhem m\u016fry jukov\u00e9.<\/p>\n\n
V\u00fdchodn\u00ed strom Jozue je opylov\u00e1n men\u0161\u00edm druhem Tegeticula antithetica, zat\u00edmco z\u00e1padn\u00ed strom Jozue je opylov\u00e1n v\u011bt\u0161\u00edm druhem Tegeticula synthetica. Tato divergence druh\u016f m\u016fr byla spojena s rozd\u00edly v morfologii kv\u011bt\u016f strom\u016f Jozue.<\/p>\n\n
V\u00fdzkum nazna\u010duje, \u017ee koevoluce vedla k t\u00e9to divergenci. M\u016fry se vyvinuly tak, aby odpov\u00eddaly velikosti blizny a semen\u00edku kv\u011btu, co\u017e zaji\u0161\u0165uje \u00fa\u010dinn\u00e9 ukl\u00e1d\u00e1n\u00ed vaj\u00ed\u010dek. Naopak stromy Jozue se vyvinuly tak, aby vyhovovaly chov\u00e1n\u00ed m\u016fr p\u0159i kladen\u00ed vaj\u00ed\u010dek, a poskytovaly dostatek prostoru pro vaj\u00ed\u010dka uvnit\u0159 sv\u00fdch kv\u011bt\u016f.<\/p>\n\n
Aby d\u00e1le prozkoumali evolu\u010dn\u00ed vztah mezi stromem Jozue a m\u016frou jukovou, mapuj\u00ed v\u011bdci genomy obou druh\u016f. Porovn\u00e1n\u00edm genom\u016f mohou v\u011bdci identifikovat geny odpov\u011bdn\u00e9 za morfologii kv\u011bt\u016f, d\u00e9lku v\u011btv\u00ed a dal\u0161\u00ed vlastnosti.<\/p>\n\n
Rozd\u00edly v d\u00e9lce klad\u00e9lka a velikosti t\u011bla mezi dv\u011bma druhy m\u016fr jukov\u00fdch jsou ve sv\u00fdch genomech v\u00fdrazn\u011bj\u0161\u00ed, co\u017e nazna\u010duje, \u017ee jejich divergenci poh\u00e1n\u011bl p\u0159irozen\u00fd v\u00fdb\u011br. V\u011bdci doufaj\u00ed, \u017ee najdou podobn\u00e9 vzorce v genomech strom\u016f Jozue.<\/p>\n\n
Zm\u011bna klimatu p\u0159edstavuje pro stromy Jozue v\u00fdznamnou hrozbu. Jak teploty stoupaj\u00ed a sr\u00e1\u017eky klesaj\u00ed, je m\u00e9n\u011b pravd\u011bpodobn\u00e9, \u017ee semen\u00e1\u010dky strom\u016f Jozue p\u0159e\u017eij\u00ed del\u0161\u00ed obdob\u00ed sucha.<\/p>\n\n
V\u011bdci p\u0159edpov\u00eddaj\u00ed, \u017ee Mohavsk\u00e1 pou\u0161\u0165 by mohla do konce stolet\u00ed ztratit a\u017e 90 % sv\u00fdch strom\u016f Jozue. Ur\u010dit\u00e9 oblasti v\u0161ak mohou slou\u017eit jako \u00fato\u010di\u0161t\u011b pro stromy, pokud z\u016fstanou bez invazivn\u00edho plevele a lesn\u00edch po\u017e\u00e1r\u016f.<\/p>\n\n
P\u0159e\u017eit\u00ed strom\u016f Jozue je z\u00e1sadn\u00ed pro biologickou rozmanitost Mohavsk\u00e9 pou\u0161t\u011b. Jako kl\u00ed\u010dov\u00fd druh poskytuj\u00ed stromy Jozue \u00fato\u010di\u0161t\u011b pro nespo\u010det hmyzu, je\u0161t\u011brek a pt\u00e1k\u016f.<\/p>\n\n
Vztah mezi stromy Jozue a mourami jukov\u00fdmi je pro ochran\u00e1\u0159sk\u00e9 \u00fasil\u00ed obzvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00fd. Bez sv\u00fdch jedin\u00fdch opylova\u010d\u016f stromy Jozue zahynou, bez ohledu na to, zda se jejich semena dok\u00e1\u017eou p\u0159izp\u016fsobit m\u011bn\u00edc\u00edm se klimatick\u00fdm podm\u00ednk\u00e1m.<\/p>\n\n
N\u011bkte\u0159\u00ed v\u011bdci navrhuj\u00ed fyzicky p\u0159esunout stromy Jozue do chladn\u011bj\u0161\u00edch oblast\u00ed jako ochran\u00e1\u0159skou strategii. Tento p\u0159\u00edstup by v\u0161ak mohl naru\u0161it jemn\u00fd symbiotick\u00fd vztah mezi stromy a mourami jukov\u00fdmi.<\/p>\n\n
Pochopen\u00ed slo\u017eit\u00fdch interakc\u00ed mezi druhy je z\u00e1sadn\u00ed pro v\u00fdvoj \u00fa\u010dinn\u00fdch ochran\u00e1\u0159sk\u00fdch strategi\u00ed tv\u00e1\u0159\u00ed v tv\u00e1\u0159 zm\u011bn\u011b klimatu. Studiem stromu Jozue a m\u016fry jukov\u00e9 mohou v\u011bdci z\u00edskat poznatky o odolnosti a p\u0159izp\u016fsobivosti pou\u0161tn\u00edch ekosyst\u00e9m\u016f a identifikovat zp\u016fsoby, jak je chr\u00e1nit.<\/p>\n\n
Strom Jozue m\u00e1 v Mohavsk\u00e9 pou\u0161ti hlubok\u00fd kulturn\u00ed v\u00fdznam. Jeho jedine\u010dn\u00fd tvar a trnit\u00e9 listy inspirovaly um\u011blce, filma\u0159e a nespo\u010det cestovatel\u016f hledaj\u00edc\u00edch transcendenci.<\/p>\n\n
Ztr\u00e1ta strom\u016f Jozue by nejen ovlivnila ekosyst\u00e9m, ale tak\u00e9 by zmen\u0161ila ikonickou krajinu Mohavsk\u00e9 pou\u0161t\u011b. Pochopen\u00ed a ochrana symbiotick\u00e9ho vztahu mezi stromem Jozue a m\u016frou jukovou nen\u00ed jen v\u011bdeck\u00fdm \u00fasil\u00edm, ale tak\u00e9 kulturn\u00edm imperativem.<\/p>","protected":false},"excerpt":{"rendered":"
Symbi\u00f3za stromu Jozue a m\u016fry jukov\u00e9 Evolu\u010dn\u00ed partnerstv\u00ed Strom Jozue, ikonick\u00fd obyvatel Mohavsk\u00e9 pou\u0161t\u011b, je pro sv\u00e9 p\u0159e\u017eit\u00ed z\u00e1visl\u00fd na m\u016f\u0159e jukov\u00e9. Tento jedine\u010dn\u00fd opylovac\u00ed vztah se vyv\u00edjel miliony let…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[590],"tags":[395,15510,15511,15509,2978,9521,8558],"class_list":["post-11459","post","type-post","status-publish","format-standard","hentry","category-ecology","tag-biodiversity","tag-co-evolution","tag-mojave-desert","tag-yucca-moth","tag-pollination","tag-joshua-tree","tag-symbiosis"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11459","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=11459"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11459\/revisions"}],"predecessor-version":[{"id":11460,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11459\/revisions\/11460"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=11459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=11459"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=11459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}