\u00cen peisajele vaste ale Parcului Na\u021bional Grand Teton din Wyoming, se desf\u0103\u0219oar\u0103 o rela\u021bie fascinant\u0103 \u00eentre antilopa pronghorn \u0219i lupi. Un studiu realizat de Wildlife Conservation Society a dezv\u0103luit c\u0103 puii crescu\u021bi \u00een apropierea lupilor au o rat\u0103 de supravie\u021buire de patru ori mai mare dec\u00e2t cei din zonele f\u0103r\u0103 lupi. Aceast\u0103 descoperire surprinz\u0103toare sugereaz\u0103 c\u0103 lupii joac\u0103 un rol crucial \u00een men\u021binerea popula\u021biilor de antilope prin controlul pr\u0103d\u0103rii de c\u0103tre coio\u021bi.<\/p>\n\n
Ad\u00e2nc \u00een p\u0103m\u00e2ntul din Mississippi, oamenii de \u0219tiin\u021b\u0103 au descoperit o fosil\u0103 remarcabil\u0103 care face lumin\u0103 asupra originii primatelor \u00een America de Nord. Teilhardina magnoliana, o primat\u0103 arboricol\u0103 care c\u00e2nt\u0103rea doar o uncie, a cutreierat continentul \u00een urm\u0103 cu aproximativ 55,8 milioane de ani. Aceast\u0103 descoperire, condus\u0103 de K. Christopher Beard de la Carnegie Museum of Natural History, sus\u021bine teoria conform c\u0103reia primatele au traversat podul terestru Bering din Asia, deschiz\u00e2nd calea pentru apari\u021bia eventual\u0103 a oamenilor.<\/p>\n\n
\u00cen largul coastei Pacificului de Nord-Vest, a ap\u0103rut un fenomen sinistru cunoscut sub numele de “zon\u0103 moart\u0103” oceanic\u0103. Aceast\u0103 zon\u0103 de ap\u0103 are niveluri periculos de sc\u0103zute de oxigen, sufoc\u00e2nd animalele marine care nu pot sc\u0103pa. Cercet\u0103torii de la Oregon State University au analizat zeci de ani de date \u0219i au concluzionat c\u0103 aceast\u0103 recent\u0103 zon\u0103 moart\u0103 este cauzat\u0103 de o combina\u021bie de v\u00e2nturi \u0219i curen\u021bi care perturb\u0103 ecosistemul \u0219i \u00eencurajeaz\u0103 cre\u0219terea bacteriilor care epuizeaz\u0103 oxigenul.<\/p>\n\n
\u00cen ora\u0219ul aglomerat Montpellier, Fran\u021ba, un studiu a dezv\u0103luit remarcabila adaptabilitate a plantelor la mediile urbane. Crepis sancta, o buruian\u0103 asem\u0103n\u0103toare p\u0103p\u0103diei, a evoluat pentru a produce diferite tipuri de semin\u021be: unele care sunt purtate de v\u00e2nt \u0219i altele care r\u0103m\u00e2n aproape de planta mam\u0103. C. sancta urban\u0103 s-a adaptat la \u00eemprejurimile sale produc\u00e2nd mai multe semin\u021be care cad pe p\u0103m\u00e2nt, profit\u00e2nd de solul bogat \u00een nutrien\u021bi care le-a sus\u021binut supravie\u021buirea \u00een mijlocul betonului \u0219i asfaltului.<\/p>\n\n
Sub apele tulburi ale mla\u0219tinilor \u0219i r\u00e2urilor, aligatorul american posed\u0103 un sistem respirator fascinant care \u00eei permite s\u0103 manevreze cu u\u0219urin\u021b\u0103. Un studiu revolu\u021bionar realizat de cercet\u0103torii de la Universitatea din Utah a documentat dublul scop al mu\u0219chilor care extind \u0219i contract\u0103 pl\u0103m\u00e2nii aligatorului. Ace\u0219ti mu\u0219chi nu numai c\u0103 faciliteaz\u0103 respira\u021bia, ci contribuie \u0219i la mi\u0219c\u0103rile subacvatice ale aligatorului. \u00cen timp ce aligatorul se scufund\u0103, mu\u0219chii \u00eei mi\u0219c\u0103 pl\u0103m\u00e2nii spre coad\u0103; \u00een timp ce iese la suprafa\u021b\u0103, \u00eei mi\u0219c\u0103 spre cap; \u0219i \u00een timp ce se rostogole\u0219te, \u00eei mi\u0219c\u0103 \u00een ambele p\u0103r\u021bi. Acest sistem de propulsie condus de pl\u0103m\u00e2ni permite aligatorului s\u0103 \u00eenoate eficient f\u0103r\u0103 a avea nevoie de \u00eenot\u0103toare sau aripioare.<\/p>\n\n
Capacitatea aligatorului american de a-\u0219i folosi pl\u0103m\u00e2nii at\u00e2t pentru respira\u021bie, c\u00e2t \u0219i pentru locomo\u021bie subliniaz\u0103 rolul critic al func\u021biei pulmonare la animalele acvatice. Mecanisme similare de propulsie conduse de pl\u0103m\u00e2ni au fost observate la alte specii acvatice, cum ar fi broa\u0219tele, salamandrele \u0219i \u021bestoasele. \u00cen\u021belegerea complexit\u0103\u021bii func\u021biei pulmonare la aceste animale ofer\u0103 informa\u021bii valoroase despre adapt\u0103rile lor evolutive \u0219i rolurile lor ecologice.<\/p>","protected":false},"excerpt":{"rendered":"
Minunile naturii s\u0103lbatice: dezv\u0103luirea secretelor naturii Antilopa pronghorn \u0219i rolul lupilor \u00cen peisajele vaste ale Parcului Na\u021bional Grand Teton din Wyoming, se desf\u0103\u0219oar\u0103 o rela\u021bie fascinant\u0103 \u00eentre antilopa pronghorn \u0219i…<\/p>\n","protected":false},"author":6,"featured_media":24061,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[244],"tags":[1647,254,219,136,252,97],"class_list":["post-1522","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-natural-history","tag-adaptation","tag-wildlife","tag-ecology","tag-evolution","tag-nature","tag-science"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/1522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/comments?post=1522"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/1522\/revisions"}],"predecessor-version":[{"id":1523,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/1522\/revisions\/1523"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media\/24061"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media?parent=1522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/categories?post=1522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/tags?post=1522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}