Ososayensi baye ekugcineni bathola ukuthi kubangelwa ukushabalala Megalodon

Ngokuhamba nomlando wayo, nezwe esiye sabhekana ukuqothulwa ezinhlanu mass (noma 8, kuye ngokuthi yini ngezigaba uprakthiza). Okubi kakhulu zalezi kwaba ukushabalala okukhulu eminyakeni million 252 edlule, okubangelwa inhlekelele mlilo futhi unichtozhevshee amaphesenti angu-96 azo zonke izinhlobo.

inguqulelo

Nokho, ezinye zezinto "ezincane" yokuqothulwa, kuyacaca ngempela, kungase balekela siyinake. Ngokwesibonelo, ososayensi baye kukade ukuthi iyinkathi yezinguquko phakathi Pliocene futhi Pleistocene (iminyaka eyizigidi ezingu-2.6 edlule), kwakukhona yokuqothulwa abalulekile, kodwa kunzima ukunquma ukuthi kwakubaluleke kangakanani eyinhlekelele.

Manje ucwaningo olusha yi labacwaningi e-University of Zurich yathola ukuthi, ngaphambi abadumile megafauna iplanethi - mammoth mammoth namakati saber-toothed - yathonya izici eziningi abasiphikisayo, izilwandle nakho balahlekelwa.

Lolu shintsho phakathi kwezinkathi ezimbili zesikhathi Geological imakwe ushintsho ku sezulu esifudumele futhi ekuqaleni glaciation ezinde kakhulu, ezingase ngokusobala kubange iconsi ngokushesha kogu lolwandle futhi lwaluyophola abalulekile amanzi.

Kungani yokuqothulwa megafauna zasolwandle

Ngokusekelwe ukulinganisela entsha yomlando wezinsalela, ososayensi baye baphetha ngokuthi kwaba ngokwanele ukubulala inombolo ngokumangalisayo enkulu izidalwa esikhulu sasolwandle: ingqikithi eyodwa kokuthathu megafauna zasolwandle saphela phakathi kwalolu shintsho.

Onzima hit ezincelisayo zasolwandle, ukulahlekelwa u-55% ukwehluka. Ngaphezu kwalokho, walahlekelwa% ezingaba ngu-35 zezinyoni zasolwandle kanye 43% of sea izimfudu. Kuyaphawuleka ukuthi phakathi nalesi sikhathi saphela, 9 kuphela amaphesenti angu oshaka, kodwa phakathi kwawo kwakukhona zinhlobo ngempela obonakalayo futhi ezibalulekile.

Ukunyamalala Megalodon

Thina, yebo, ukhuluma ngani Megalodon - omunye izilwane ezidla ezinye ngobukhulu futhi esaba kakhulu emlandweni le planethi, lapho ekhula 18 amamitha. Kuyathakazelisa ukuthi ngezikhathi ezithile e web lapho becabanga ukuthi lesi silo esisabekayo namanje lurks endaweni ethile ekujuleni kwezilwandle.

Naphezu kwakho konke lokhu izindaba, ososayensi baye ngokucacile ukuthi Megalodon saphela eminyakeni million 2.6 edlule. Kusukela aqala wathola Ubufakazi bemivubukulo yasendulo ukuthi zikhona, ososayensi baye bazama ukuthola ukuthi kungani lokhu kwenzekile. Sathola ezahlukahlukene, kufaka phakathi wokugoqa eziwukudla, umncintiswano ngokweqile kwezinye izilwane kanye nokupholisa okungazelelwe olwandle.

Self-ukubhujiswa eziwukudla

Ucwaningo olusha ngale ndaba eziye zanyatheliswa komagazini i-Nature Ecology Evolution. Ososayensi basikisela ukuthi ukulahlekelwa ngenxa wehlise amazinga olwandle eziphila izindawo ezingasogwini ngokwanele ukuze zenze ukuba kunyuke nokuqothulwa engakwazanga asinde ngisho nasezimweni lasendulo basking ushaka. Eqinisweni, imbangela ukushabalala Megalodon kwaba azibhubhise eziwukudla.

"Ukuvulwa kwe-le yokuqothulwa umcimbi kubonisa ukuthi izinhlobonhlobo zezinto eziphilayo of megafauna zasolwandle bazwelane kakhudlwana izinguquko ezenzeka imvelo kunalokho okwakucatshangwa" - ososayensi bathi. Base ubheke lamanje olubangelwa kwesimo sezulu, siphawula ukuthi yayo "imiphumela amathuba megafauna zasolwandle akufanele ithathwe kancane."