{"id":12250,"date":"2020-10-17T02:41:05","date_gmt":"2020-10-17T02:41:05","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=12250"},"modified":"2020-10-17T02:41:05","modified_gmt":"2020-10-17T02:41:05","slug":"mammoth-herd-life-revealed-in-rare-fossil-tracks","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/ro\/science\/paleontology\/mammoth-herd-life-revealed-in-rare-fossil-tracks\/","title":{"rendered":"Via\u021ba turmelor de mamu\u021bi dezv\u0103luit\u0103 \u00een urme fosile rare"},"content":{"rendered":"

Via\u021ba turmei de mamu\u021bi dezv\u0103luit\u0103 \u00een rare urme fosile<\/h2>\n\n

Urmele picteaz\u0103 o imagine a dinamicii sociale<\/h2>\n\n

O descoperire remarcabil\u0103 la Lacul Fossil din Oregon a scos la iveal\u0103 comportamentul social complex al mamu\u021bilor antici. O echip\u0103 de cercet\u0103tori a descoperit o sec\u021biune sinuoas\u0103 de 117 urme l\u0103sate de o turm\u0103 de mamu\u021bi columbieni \u00een urm\u0103 cu 43.000 de ani.<\/p>\n\n

Urmele au surprins un moment intim \u00eentre o femel\u0103 adult\u0103 r\u0103nit\u0103 \u0219i puii ei \u00eengrijora\u021bi, oferind o perspectiv\u0103 f\u0103r\u0103 precedent asupra dinamicii turmei lor. Analiza echipei sugereaz\u0103 c\u0103 structura matriarhal\u0103 a turmelor de mamu\u021bi, similar\u0103 cu cea a elefan\u021bilor moderni, s-a extins p\u00e2n\u0103 la \u00eengrijirea membrilor r\u0103ni\u021bi.<\/p>\n\n

Urme neobi\u0219nuite dezv\u0103luie r\u0103nirea<\/h2>\n\n

Spre deosebire de alte poteci cunoscute ale mamu\u021bilor, traseul de la Lacul Fossil a prezentat caracteristici neobi\u0219nuite. Urmele erau apropiate, partea dreapt\u0103 era mult mai ad\u00e2nc\u0103 dec\u00e2t cea st\u00e2ng\u0103, iar urmele piciorului st\u00e2ng din spate erau deosebit de estompate. Aceste anomalii i-au determinat pe cercet\u0103tori s\u0103 cread\u0103 c\u0103 animalul avea o leziune la piciorul st\u00e2ng din spate, ceea ce f\u0103cea s\u0103 \u0219chiop\u0103teze \u0219i s\u0103 se mi\u0219te \u00eencet.<\/p>\n\n

Mamu\u021bii tineri \u00ee\u0219i arat\u0103 \u00eengrijorarea<\/h2>\n\n

\u00centre urmele adul\u021bilor erau \u00eempr\u0103\u0219tiate urme mai mici, despre care se crede c\u0103 apar\u021bin unui mamut juvenil \u0219i unui pui. Ace\u0219ti mamu\u021bi tineri se \u00eentorceau \u00een mod repetat la mamutul \u0219chiop, verific\u00e2ndu-i probabil progresul \u0219i interac\u021bion\u00e2nd cu el cu tandre\u021be. Cercet\u0103torii au observat similitudini cu comportamentul compasional observat la elefan\u021bii africani moderni.<\/p>\n\n

Structura matriarhal\u0103 a turmei<\/h2>\n\n

Se crede c\u0103 elefantul conduc\u0103tor de la situl Lacului Fossil era o femel\u0103, pe baza prezen\u021bei mamu\u021bilor tineri \u0219i a absen\u021bei urmelor compatibile cu un mascul matur. \u00cen turmele de mamu\u021bi, la fel ca la elefan\u021bii moderni, femelele mai \u00een v\u00e2rst\u0103 conduceau \u00een mod obi\u0219nuit grupul \u0219i aveau grij\u0103 de pui.<\/p>\n\n

Traseul conservat de cenu\u0219a vulcanic\u0103<\/h2>\n\n

P\u0103strarea excep\u021bional\u0103 a urmelor Lacului Fossil este atribuit\u0103 unei combina\u021bii \u00eent\u00e2mpl\u0103toare de vreme \u0219i geologie. Urmele au fost s\u0103pate \u00een sedimente bogate \u00een cenu\u0219\u0103 vulcanic\u0103 provenit\u0103 de la o erup\u021bie a Muntelui Saint Helens. P\u0103tura de cenu\u0219\u0103 a transformat p\u0103\u0219unea \u00eenconjur\u0103toare \u00eentr-o \u00eentindere noroioas\u0103, oferind o suprafa\u021b\u0103 ideal\u0103 pentru trasee.<\/p>\n\n

Implica\u021bii ecologice<\/h2>\n\n

Dincolo de dezv\u0103luirea dinamicii turmelor de mamu\u021bi, urmele Lacului Fossil ofer\u0103, de asemenea, informa\u021bii despre schimb\u0103rile dramatice care au avut loc \u00een ecosistem de-a lungul timpului. Analiza solului efectuat\u0103 de cercet\u0103tori sugereaz\u0103 c\u0103 regiunea a trecut de la paji\u0219te la un peisaj sterp \u0219i \u00eenapoi, de-a lungul zecilor de mii de ani. Aceast\u0103 tranzi\u021bie ar fi putut fi influen\u021bat\u0103 de dispari\u021bia mamu\u021bilor \u0219i a altor erbivore mari, care au jucat un rol crucial \u00een men\u021binerea s\u0103n\u0103t\u0103\u021bii paji\u0219tilor.<\/p>\n\n

O fereastr\u0103 c\u0103tre trecut<\/h2>\n\n

Urmele de mamu\u021bi de la Lacul Fossil sunt o dovad\u0103 a puterii descoperirilor paleontologice de a ilumina via\u021ba \u0219i comportamentele creaturilor antice. Acest traseu rar \u0219i bine conservat ofer\u0103 o perspectiv\u0103 unic\u0103 asupra dinamicii sociale complexe a turmelor de mamu\u021bi \u0219i a interac\u021biunii dintre comportamentul animalelor \u0219i schimbarea ecosistemului.<\/p>","protected":false},"excerpt":{"rendered":"

Via\u021ba turmei de mamu\u021bi dezv\u0103luit\u0103 \u00een rare urme fosile Urmele picteaz\u0103 o imagine a dinamicii sociale O descoperire remarcabil\u0103 la Lacul Fossil din Oregon a scos la iveal\u0103 comportamentul social…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[99,16549,4738,137,16548],"class_list":["post-12250","post","type-post","status-publish","format-standard","hentry","category-paleontology","tag-lifescienceart","tag-herd-dynamics","tag-mammoths","tag-paleontology","tag-fossil-tracks"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/12250","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=12250"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/12250\/revisions"}],"predecessor-version":[{"id":12251,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/12250\/revisions\/12251"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media?parent=12250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/categories?post=12250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/tags?post=12250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}