Polar Bears, manyan yan damfara ta Arewa Pole, sun zama alama ta canjin yanayi. A wannan ɓangaren na duniya, yanayin zafin ya kasance yana da digiri da yawa ƙasa da sifili, musamman, daga -43 zuwa -26 digiri Celsius kamar. Don haka, waɗannan kyawawan dabbobin sun sami damar farautar hatimin, waɗanda shine babban abincin su, ba tare da wata matsala mai yawa ba, amma tare da dumamar yanayi yanayinku yana canzawa da yawa.
A cewar wani binciken da aka buga a cikin »Journal of Animal Ecology», ana tilasta musu su ci ƙwai na agwagwa, geese da kifin kifi su tsira.
Charmain Hamilton, masaniyar kimiyya ne a Cibiyar Polar ta kasar Norway, ta bayyana cewa kafin dumamar yanayi ya fara yin tasiri a Arewacin Pole, kankara ta kankama a yankunan da ke bakin teku kusa da kankarar har zuwa karshen bazara. Don haka, hatimai na iya hutawa kusa da masu numfashi kuma beyar na iya farautar su.
Koyaya, a cikin Svalbard, tsibirin tsibirin Norwegian wanda yake a cikin Tekun Arctic, zafin jiki ya tashi sau uku cikin sauri fiye da sauran yankuna na duniyar tamu, don haka kankara ya zama mai saurin lalacewa da haɗari, musamman ga belar polar.
»Kamar yadda komowar ruwan kankara ya sanya musu wahala ga farautar hatimai masu kara, sai gashi yanzu sun rage lokaci a kusa da kankara, suna yin tafiya mai nisa a kowace rana kuma ciyar da lokaci mai yawa tare da madadin hanyoyin abinci, kamar ƙauyukan kiwon dabbobi na agwagwa da geeseIn ji Hamilton.
90% na abincin waɗannan dabbobi masu shayarwa ya dogara da wasu dabbobi. Saboda narkewar, suna da matsaloli da yawa don samun abincin su na yau da kullun. Idan wannan ya ci gaba, sarkar abinci na iya canzawa da yawa har ma za ta iya kashe su, tunda yawan tsuntsayen ba su da yawa sosai idan aka kwatanta da yawan bera.
Kuna iya karanta karatun a nan.