Izazinzulu ziye ekugqibeleni wafumanisa ukuba yintoni eyabangela ekutshabalaleni Megalodon

Phezu imbali yayo, ihlabathi abanamava ziphele nya ezintlanu ubunzima (okanye 8, kuxhomekeke kudidi ugcina). Lalibhekisela kula ukuphela elikhulu kwiminyaka million 252 eyadlulayo, zibangelwa yi iqhuma enkulu mlilo unichtozhevshee 96 ekhulwini zonke iintlobo.

Inguquko

Noko ke, ezinye i "ezincinane" wokutshabalala, nto Kucacile, ukuba balekela ingqalelo yethu. Ngokomzekelo, izazinzulu ziye kukade ukuba kweli thuba lokulungiselela utshintsho phakathi Pliocene kunye Pleistocene (malunga-2.6 yezigidi kwiminyaka eyadlulayo), kwabakho ukuphela ebalulekileyo, kodwa kunzima ukumisela ukuba ngayo kwintlekele.

Ngoku isifundo esitsha uphando kwiYunivesithi yase Zurich wafumanisa ukuba, phambi kokuba umhlaba megafauna odumileyo - mammoths ezinoboya kunye saber-unamazinyo iikati - ityhefwe izinto ezininzi bamchasa uYesu, iilwandle nayo ubunzima ilahleko.

Olu tshintsho phakathi kwala maxesha zejoloji iphawulwe utshintsho kwimozulu efudumeleyo ngqalo glaciation olubanzi, nto leyo ekubonakala kwabangela ukwehla ngokukhawuleza kwinqanaba ulwandle kobubi elibalulekileyo emanzini.

megafauna marine Kutheni extinct

Ngokusekelwe kuqikelelo entsha ingxelo yefosili, izazinzulu ziye zagqiba ukuba kwanele ukubulala inani ngokumangalisayo enkulu izidalwa ezinkulu zolwandle: bebonke esisisinye kwisithathu megafauna zaselwandle saphela ngexesha le nguqu.

Ahlaselwe kanobom nezilwanyana zaselwandle, ukulahlekelwa 55% iyantlukwano. Ukongeza, ukuba ngaba 35% yeentaka zaselwandle kunye 43% of Ufudo yolwandle. Kuyaphawuleka ukuba ngeli xesha saphela, 9 kuphela epesenti lookrebe, kodwa phakathi kwazo kwakukho iintlobo ngendlela ephawuleka nebalulekileyo.

Zanyamalala i Megalodon

Thina, Kakade ke, ukuthetha malunga Megalodon - omnye ezizingelayo sikhulu kakhulu ebhungeni kwimbali umhlaba, amila ukuya kwiimitha ezili-18. Okubangel 'umdla kukuba ukususela amaxesha ngamaxesha apha kule web apho beqiqa ukuba eli rhamncwa enzima nangoku oma kwindawo ethile ezinzulwini kolwandle.

Nangona zonke ezi amabali, izazinzulu ziye zachongwa ngokucacileyo ukuba Megalodon saphela kwiminyaka yezigidi 2.6 eyadlulayo. Ekubeni sibanjwa kuqala ubungqina eziphili bobukho zabo, izazinzulu baye bazama ukufumana isizathu sokuba oku kwenzeke. Safumana ezahlukeneyo izinto, kubandakanywa ngokuwa ikhonkco lokutya, ukhuphiswano ngokugqithiseleyo kwezinye izilwanyana kunye nokupholisa ngesiquphe yolwandle.

Self-ukutshatyalaliswa kwikhonkco lokutya

Uphando olutsha ngalo mba sele epapashwe kwiphephancwadi Nature Ecology Evolution. Izazinzulu lubonisa ukuba ilahleko ngenxa ukuthoba izinga elwandle eziphilayo iindawo zokuhlala enxwemeni yayanele kubangela ekutshabalaleni yeenginginya nanto leyo eyayingekhe ukuba asinde na basking shark yamandulo. Enyanisweni, unobangela ekutshabalaleni Megalodon yaba ikhonkco lokutya self-ngokwawo.

"Ukuvulwa le ukuphela siganeko sibonisa ukuba iyantlukwano yezinto eziphilayo megafauna zaselwandle sensitive ngakumbi iinguqu ezenzeka kwindawo kunokuba ndacinga ngaphambili" - ezi zithi iinzululwazi. Emva koko jonga utshintsho ngoku kwemozulu ngabantu kuneendawo, makuqatshelwe ukuba yayo "iziphumo kuba megafauna elwandle kufanele kungajongelwa phantsi."