A cikin zamanin Cenozoic mun hadu da Zamanin Paleocene wanda ya fara daga kimanin shekaru miliyan 66 da suka gabata zuwa shekaru miliyan 56 da suka gabata. Ya kasance a cikin zamanin Paleogene kuma an san shi da wasu canje-canje masu saurin gaske da suka wanzu a duniya. Da Faleocene fauna An bayyana ta da tsarin halaka dinosaur ɗin tare da wasu yanayi na rashin jituwa. A wannan lokacin, an kafa wasu yanayi don duniyar ta ɗan sami daidaito kuma zai iya haifar da ci gaban tsire-tsire da dabbobi da yawa.
A cikin wannan labarin zamu gaya muku game da duk halaye da canje-canje na fauna na Paleocene.
Zamanin Paleocene
A lokacin duniya tana aiki sosai daga mahangar kasa. Yunkurin nahiya ya ci gaba da motsi don raba babbar nahiyar da aka sani da Pangea kuma nahiyoyin suka karkata zuwa inda suke a yau.
Dangane da halittu iri-iri, ya kasance game da lokaci mai yawan dabbobi da tsire-tsire. Kungiyoyin dabbobin da suka rayu daga bacewar zamanin da suka gabata sun sami damar daidaitawa da yanayin muhalli daban-daban. Daga nan, suka bazu, suna mamaye manyan yankuna kuma suna jujjuya zuwa jinsuna da jinsi.
Ganin tsananin yanayin ilimin kasa a wannan karon ya bayyana, muna da wasu faranti wadanda suka fara tafiya yayin nura_m_inuwa kuma daga ƙarshe sun zauna a wasu wurare a ko'ina cikin Paleocene. Yanayin ya kuma haifar da wasu manyan zafin cewa Sun haifar da gagarumin canji a cikin ci gaban jinsunan halittu masu rai da yankinsu na rarrabawa da wurin zama.
Bambancin halittu da kuma fure
Tunda Paleocene ya fara nan da nan bayan aiwatar da ɓarkewar ɗimbin yawa a matakin duniyoyi, yawancin jinsi dole su rayu kuma su dace da sababbin yanayi. Wannan babban ɓarnar ya haifar da cewa rayayyun jinsunan dole ne su yaɗu a cikin ƙasa da kuma juyin halitta. Yawancin waɗannan rayayyun jinsunan sun zama sabon nau'in mamaye a doron ƙasa.
Wannan tsari na halaka mutane shine mafi yawan karatun da aka sani a tarihi kuma aka sani dashi ƙarancin taro da Teran Critaceous da Tertiary. Anan ne yawancin dabbobin duniya suka mutu kuma dinosaur suka yi fice.
Amma ga flora na Paleocene mun sami tsire-tsire da yawa waɗanda har yanzu suna ci gaba a yau. Wasu shuke-shuke da suka bunkasa a wannan lokacin sune dabinon, conifers, da cacti. An samo wannan albarkacin bayanan burbushin halittu waɗanda kwararru suka tattara. Hakanan akwai wuraren da fern ya kasance shuka mai yawan gaske.
Tunda yanayin da ya wanzu yayin Paleocene ya kasance mai tsananin zafi da danshi sun fi son ci gaban manyan yankuna tare da tsire-tsire masu tsire-tsire da shuke-shuke iri-iri na farkon gandun daji da dazuzzuka. Wannan cigaban yanayin halittar yankuna masu zafi mai yalwar zafi, yanayin dumi da ciyayi mai yawa na iya bada izinin bayyanar sabon sauna.
Ifunƙun duwatsu sun mamaye duk waɗancan wuraren da yanayin zafin yake ya yi ƙasa. Waɗannan kwatarniyar an shimfida su zuwa waɗancan yankuna kusa da sandunan. Wani tsirrai wanda yaci gaba da yaduwa shine angiosperms. Ana kiyaye waɗannan tsire-tsire a yau.
Faleocene fauna
Game da fauna na Paleocene, muna da dabbobi da yawa waɗanda dole ne su shawo kan lamarin ɓarna na marigayi Cretaceous. Dabbobin da zasu iya rayuwa sun sami damar fadada fadadawa ta kasashe daban-daban a duniya. Musamman ma sun yi amfani da damar da dinosaur ɗin suka riga suka kasance, waɗannan sune mafiya girman dabbobi a duniya. Waɗannan dabbobin da ke cin abincin sun yi gasa don albarkatun muhalli, don haka kasancewar dinosaur, haɓaka abubuwa da mamaye yankin ya fi sauƙi.
Daga cikin rukunin dabbobin da suke mallakar na Paleocene fauna kuma suka yadu a cikin mafi girman akwai dabbobi masu shayarwa, tsuntsaye, dabbobi masu rarrafe da kifi. Za mu bincika kowane ɗayansu.
dabbobi masu rarrafe
Dabbobi masu rarrafe sune rukunin dabbobin da suka rayu bayan fadada kuma sun sami tagomashi da yanayin canjin da ake samu a wannan lokacin. Yanayin muhalli ya basu damar yaduwa akan wasu yankunan da suka dace da rayuwarsu.
Daga cikin dabbobi masu rarrafe mafi yawan sansanin sansanin yankuna sun mamaye, wanda ya rayu a cikin wuraren zama na ruwa. Jikinsu yayi kama da na manyan ƙadangare kuma suna da doguwar jela mai ƙananan ƙafafu 4. Wasu daga cikin waɗannan samfurin na iya auna tsawon mita 2 a tsawon kuma haƙoransu na iya farautar abincinsu da sauƙi. Macizai da kunkuru kuma suna da ci gaban su a wannan lokacin.
Aves
Tsuntsayen Paleocene sun zauna a wannan duniyar kuma sun faɗaɗa saboda ƙaruwar yanayin zafi a yankunan zafi. Tsuntsaye na jinsi Gastornis, wanda aka sani da tsuntsaye masu ban tsoroSuna da girma amma ba su da ikon tashi. Babban halayyar wannan halittar ita ce suna da babban baki wanda yake da kakkausar lafazi. Dabi'unsu sun kasance masu cin nama kuma sun kasance masu ban tsoro ga dabbobi da yawa.
Duk tsawon wannan lokaci, yawancin tsuntsayen da suka ci gaba a yau sun haɓaka kuma sun fito ne saboda yanayin muhalli. Daga cikin wannan rukunin tsuntsayen da muke samu dorinar ruwa, mujiya, tattabaru da agwagwa, da sauransu.
Faleocene fauna: kifi da dabbobi masu shayarwa
A lokacin halakar taro mai yawa na Cretaceous, babban ɓangaren dabbobin ruwa da duk dinosaur ɗin tekun suma sun ɓace. Wannan ya haifar da karancin gasa a cikin yanayin ruwa kuma ya haifar da kifayen kifayen sun zama sabbin masu cin nama. Yawancin kifayen da suka ci gaba a yau sun bayyana a wannan lokacin.
Game da dabbobi masu shayarwa, shine rukunin da ya fi nasara a cikin fauna na Paleocene. Wuraren kallo, monotremes da marsupials sun tsaya waje. Mazaje ne rukuni ne na dabbobi masu shayarwa wanda babban halayyar su shine ci gaban tayi a cikin uwa. Sadarwa tsakanin su ta tabbata albarkacin cibiya da mahaifa. A cikin wannan ƙungiyar sune rodents, lemurs da primates, da sauransu.
Marsupials wani rukuni ne na dabbobi masu shayarwa wanda mace ke gabatar da wata jaka wacce aka santa da sunan marsupium. Anan zamu sami kangaroos kuma ba ta da wakilai da yawa a cikin Paleocene. A ƙarshe, monotremes ɗin dabbobi ne waɗanda halayensu suke kama da dabbobi masu rarrafe da tsuntsaye. Jikinsu ya rufe da mayafi amma suna da ruwa. Anan ne platypus da echidna.
Ina fatan cewa tare da wannan bayanin zaku iya ƙarin koyo game da fauna na Paleocene.