Wata hanyar nazarin burbushin halittu kuma ana iya kiranta da "blitz na dinosaur."
An aro kalmar ne daga masana ilmin halittu waɗanda ke tsara "bio-blitzes." A cikin bio-blitz, masu sa kai suna taruwa don tattara kowane samfurin halitta da zai yiwu daga wani takamaiman wurin zama a cikin wani takamaiman lokaci. Misali, bio-blitzers na iya shirya a ƙarshen mako don tattara samfuran dukkan halittu masu rarrafe da dabbobi masu rarrafe da za a iya samu a cikin kwarin dutse.
A cikin wani nau'in dino-blitz, manufar ita ce a tattara burbushin halittu masu yawa na nau'in dinosaur daga wani takamaiman gadon burbushin halittu ko kuma daga wani takamaiman lokaci gwargwadon iko. Ta hanyar tattara babban samfurin nau'in guda ɗaya, masana ilmin burbushin halittu za su iya neman canje-canje a jikin halittu a tsawon rayuwar membobin nau'in.
Sakamakon wani mummunan yanayi da aka sanar a lokacin bazara na 2010, ya tayar da hankalin mafarautan dinosaur. Haka kuma ya haifar da muhawara da ta mamaye duniya a yau.
Tsawon sama da shekaru ɗari, masana ilmin burbushin halittu sun zana rassan bishiyoyin dinosaur guda biyu daban-daban: ɗaya na Triceratops da ɗaya na Torosaurus. Duk da cewa akwai bambance-bambance tsakanin su biyun, suna da kamanceceniya da yawa. Dukansu masu cin ganyayyaki ne. Dukansu sun rayu a zamanin marigayi Cretaceous. Dukansu sun tsiro da ƙashi, kamar garkuwa, a bayan kawunansu.
Masu binciken sun yi mamakin abin da dinosaur zai iya bayyana game da irin waɗannan halittu masu kama da juna.
Tsawon shekaru goma yankin Montana mai arzikin burbushin halittu wanda aka sani da Hell Creek Formation an samo ƙasusuwan Triceratops da Torosaurus.
Kashi arba'in cikin ɗari na burbushin halittu sun fito ne daga Triceratops. Wasu kwanyar suna da girman ƙwallon ƙafa ta Amurka. Wasu kuma girman ƙananan motoci ne. Kuma duk sun mutu a matakai daban-daban na rayuwa.
Dangane da ragowar Torosaurus, abubuwa biyu sun bayyana: na farko, burbushin Torosaurus sun yi karanci, na biyu kuma, ba a sami ƙoƙon Torosaurus marasa girma ko na yara ba. Kowanne ƙoƙon Torosaurus babban ƙoƙon manya ne. Me yasa hakan? Yayin da masana ilmin halittu suka yi tunani a kan tambayar kuma suka kawar da yiwuwar faruwar hakan, an bar su da ƙarshe ɗaya da ba za a iya kauce masa ba. Torosaurus ba wani nau'in dinosaur daban ba ne. Dinosaur da aka daɗe ana kiransa Torosaurus shine nau'in Triceratops na ƙarshe na girma.
An gano shaidar a cikin kwanyar. Da farko, masu binciken sun yi nazarin babban tsarin kwanyar. Sun auna tsayi, faɗi, da kauri na kowace kwanyar a hankali. Sannan suka duba ƙananan bayanai kamar yadda aka tsara yanayin saman da ƙananan canje-canje a cikin frills. Bincikensu ya tabbatar da cewa an "gyara kwanyar Torosaurus sosai". A wata ma'anar, kwanyar Torosaurus da ƙasusuwan ƙashi sun sami sauye-sauye masu yawa a rayuwar dabbobin. Kuma wannan shaidar sake fasalin ta fi shaidar da ke cikin ko da mafi girman kwanyar Triceratops, wasu daga cikinsu sun nuna alamun samun canji.
A cikin babban mahallin, binciken dino-blitz ya nuna cewa yawancin dinosaur da aka gano a matsayin nau'in halittu daban-daban a zahiri na iya zama nau'i ɗaya kawai.
Idan ƙarin bincike ya goyi bayan ƙarshen Torosaurus-kamar yadda manya-Triceratops suka yi, hakan zai nuna cewa dinosaurs na marigayi Cretaceous ba su da bambancin ra'ayi kamar yadda masana ilmin burbushin halittu da yawa ke yi imani. Ƙananan nau'ikan dinosaurs za su nuna cewa ba su da sauƙin daidaitawa da canje-canje a muhalli da/ko kuma sun riga sun fara raguwa. Ko ta yaya, dinosaurs na marigayi Cretaceous za su fi fuskantar barazanar ɓacewa bayan wani mummunan lamari na kwatsam wanda ya canza tsarin yanayi da muhallin Duniya fiye da ƙungiyoyi masu bambancin ra'ayi.
——— Daga Dan Risch
Lokacin Saƙo: Fabrairu-17-2023