{"id":222102,"date":"2024-11-14T22:00:00","date_gmt":"2024-11-14T20:00:00","guid":{"rendered":"https:\/\/life.karpat.in.ua\/?p=222102"},"modified":"2024-11-14T11:47:34","modified_gmt":"2024-11-14T09:47:34","slug":"borostyant-talaltak-az-antarktiszon","status":"publish","type":"post","link":"https:\/\/life.karpat.in.ua\/?p=222102&lang=hu","title":{"rendered":"Borosty\u00e1nt tal\u00e1ltak az Antarktiszon"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

Nem mindennapi felfedez\u00e9st tettek az Antarktiszon \u2013 kiv\u00e1l\u00f3 min\u0151s\u00e9g\u0171 borosty\u00e1nt tal\u00e1ltak a f\u00f6ldr\u00e9szen.<\/strong><\/p>\n\n\n\n

K\u00f6r\u00fclbel\u00fcl 90 milli\u00f3 \u00e9vvel ezel\u0151tt a D\u00e9li-sarkon megfelel\u0151ek voltak az \u00e9ghajlati felt\u00e9telek a gyantatermel\u0151 f\u00e1k sz\u00e1m\u00e1ra. Az Alfred Wegener Int\u00e9zet \u00e9s a TU BergakademieFreiberg \u00e1ltal vezetett kutat\u00f3csapat publik\u00e1lt egy dolgozatot az Antarctic Science magazinban egy a D\u00e9li-sarkon felfedezett borosty\u00e1nr\u00f3l. Mostan\u00e1ig volt egy r\u00e9s a borosty\u00e1nfelfedez\u00e9sek vil\u00e1gt\u00e9rk\u00e9p\u00e9n: a D\u00e9li-sark. De ez most megsz\u0171nt a k\u00e9t int\u00e9zet kutat\u00f3inak k\u00f6sz\u00f6nhet\u0151en.<\/p>\n\n\n\n

Dolgozatukban le\u00edrj\u00e1k azt a borosty\u00e1nt, amit egy \u00fcled\u00e9kmagban fedeztek fel, egy k\u00f6r\u00fclbel\u00fcl 5 centim\u00e9ter vastag lignitr\u00e9tegben.  Az \u00fcled\u00e9kmagot a Polarstern kutat\u00f3 j\u00e9gt\u00f6r\u0151vel v\u00e9gzett exped\u00edci\u00f3 sor\u00e1n nyert\u00e9k ki 946 m\u00e9teres v\u00edzm\u00e9lys\u00e9gb\u0151l 2017-ben a MARUM-MeBo70 tengerfen\u00e9ki f\u00far\u00f3szerkezettel. Mivel a borosty\u00e1nt a Feny\u0151-sziget-\u00f6b\u00f6lben tal\u00e1lt\u00e1k, a \u201cFeny\u0151-sziget borosty\u00e1n\u201d nevet adt\u00e1k. (Pontos helysz\u00edn: d\u00e9li sz\u00e9less\u00e9g 73.57\u00b0 \u00e9s nyugati hossz\u00fas\u00e1g 107.09) Az elemzett borosty\u00e1n t\u00f6red\u00e9kek \u00e1ltal k\u00f6zvetlen\u00fcl bepillanthatunk azokba a k\u00f6rnyezeti kond\u00edci\u00f3kba, amik 90 milli\u00f3 \u00e9vvel ezel\u0151tt a D\u00e9li-sark nyugati r\u00e9sz\u00e9n uralkodtak.<\/p>\n\n\n\n

A felfedez\u00e9sb\u0151l jobban megismerj\u00fck a kr\u00e9ta id\u0151szaki D\u00e9li-sark k\u00f6zeli mocsaras, t\u0171level\u0171ben gazdag, m\u00e9rs\u00e9kelt es\u0151erd\u0151k k\u00f6rnyezet\u00e9t.<\/p>\n\n\n\n

A borosty\u00e1n val\u00f3sz\u00edn\u0171leg tartalmaz eredeti fak\u00e9reg maradv\u00e1nyokat<\/strong><\/p>\n\n\n\n

Egy bizonyos ponton mind a h\u00e9t kontinensen olyan \u00e9ghajlat volt, ami lehet\u0151v\u00e9 tette a gyantatermel\u0151 f\u00e1k t\u00fal\u00e9l\u00e9s\u00e9t. A kutat\u00f3k c\u00e9lja az, hogy t\u00f6bbet megtudjanak az erdei \u00f6kosziszt\u00e1m\u00e1r\u00f3l \u2013 vajon le\u00e9gett-e, vajon tal\u00e1lnak-e \u00e9letre utal\u00f3 nyomokat a borosty\u00e1nban? Az analiz\u00e1l\u00e1st visszavert f\u00e9ny mikroszk\u00f3ppal \u00e9s fluoreszk\u00e1l\u00f3 mikroszk\u00f3ppal v\u00e9gezt\u00e9k. Ehhez az forr\u00e1sanyagot leveg\u0151n kellett sz\u00e1r\u00edtani \u00e9s \u00f3vatosan, nagyj\u00e1b\u00f3l 1 millim\u00e9ter \u00e1tm\u00e9r\u0151j\u0171 t\u00f6red\u00e9kekre kellett felszeletelni. Az elemz\u00e9s sor\u00e1n izgalmas strukt\u00far\u00e1kat fedeztek fel. Az antarktiszi borosty\u00e1n val\u00f3sz\u00edn\u0171leg tartalmaz eredeti fak\u00e9reg maradv\u00e1nyokat mikorz\u00e1rv\u00e1nyok form\u00e1j\u00e1ban. Tekintve szil\u00e1rd, \u00e1tl\u00e1tsz\u00f3 r\u00e9szecsk\u00e9it, a borosty\u00e1n kiv\u00e1l\u00f3 min\u0151s\u00e9g\u0171, ami azt mutatja, hogy a felsz\u00ednhez k\u00f6zel temet\u0151d\u00f6tt el, mivel a borosty\u00e1n sz\u00e9tsz\u00f3r\u00f3dik a n\u00f6vekv\u0151 h\u0151stressz \u00e9s temet\u00e9si m\u00e9lys\u00e9g alatt. A csapat patol\u00f3giai gyantafoly\u00e1sra utal\u00f3 jeleket is felfedezett. A gyanta a f\u00e1k v\u00e9delmi strat\u00e9gi\u00e1ja, hogy elz\u00e1rj\u00e1k a parazit\u00e1k, vagy erd\u0151t\u00fczek \u00e1ltal k\u00e1rosodott k\u00e9rget; a k\u00e9miai \u00e9s fizikai g\u00e1t megv\u00e9di a rovarok t\u00e1mad\u00e1s\u00e1t\u00f3l \u00e9s a fert\u0151z\u00e9sekt\u0151l. A gyanta egy k\u00f6zvetlen n\u00f6v\u00e9nyi term\u00e9k, els\u0151sorban a nyitvaterm\u0151k \u00e1ltal a n\u00f6v\u00e9nyen bel\u00fcl, vagy a n\u00f6v\u00e9ny felsz\u00edn\u00e9re kiv\u00e1lasztott ill\u00e9kony \u00e9s nem ill\u00e9kony vegy\u00fcletek zs\u00edrban old\u00f3d\u00f3 kever\u00e9ke. Vannak olyan n\u00f6v\u00e9nyek, amik mizonyos k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt fossziliz\u00e1l\u00f3dnak \u00e9s a geol\u00f3giai lemezekben borosty\u00e1nk\u00e1nt maradnak fenn.<\/p>\n\n\n\n

<!– translatorid:vik3255 –><\/p>\n\n\n\n

Forr\u00e1s<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Nem mindennapi felfedez\u00e9st tettek az Antarktiszon \u2013 kiv\u00e1l\u00f3 min\u0151s\u00e9g\u0171 borosty\u00e1nt tal\u00e1ltak a f\u00f6ldr\u00e9szen.<\/p>\n","protected":false},"author":4,"featured_media":221955,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15,41,49,598,39],"tags":[24362,20552],"class_list":["post-222102","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-nap-hirei","category-cikkek","category-hirek","category-tudomany","category-vilag","tag-antarktisz","tag-tudomanyos-felfedezes"],"_links":{"self":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/222102","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=222102"}],"version-history":[{"count":1,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/222102\/revisions"}],"predecessor-version":[{"id":222103,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/posts\/222102\/revisions\/222103"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=\/wp\/v2\/media\/221955"}],"wp:attachment":[{"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=222102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=222102"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/life.karpat.in.ua\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=222102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}