Isilwane esifanekisela amaholidi kaKhisimusi, inyamazane yezilwane, sinenkinga enzima ngenxa yokufudumala kwembulunga yonke ngokusho kocwaningo olwenziwe emhlanganweni waminyaka yonke we-British Ecological Society (BES) eLiverpool futhi olushicilelwe ephephabhukwini i-Global Change Biology. Inani labantu liyancipha, nalabo abazalwayo bahlala bencane futhi bancane.
Kungaba sengozini yokuqothulwa? Kungenzeka. Ake sibone ukuthi kungani.
I-reindeer eyazalelwa eNorway Arctic ngo-1994 yayinesisindo esingu-55kg, kodwa eyakwenza ngo-2010 yayinesisindo esingamaphesenti ayishumi nambili, okusho ukuthi, ama-48kg. I-12% ingahle ibonakale incane, kepha kufanele kubhekelwe lokho kwalesi silwane isisindo sibaluleke kakhulu ekukhiqizweni nasekusindeni kohloboNjengoba kushiwo uSteve Albon, umholi ocwaningweni, owengeze wathi: "Imibiko ikhombisile ukuthi lapho isisindo sabantu abadala singaphansi kuka-50kg, inani labantu lihle kakhulu."
Amazinga okushisa angaphezulu kwe-Arctic, ngokusho kososayensi, angama-2,8 degrees Celsius aphezulu kunango-2015, ngakho-ke i-reindeer inezinkinga eziningi ngokwengeziwe zokondla obulembu nobulembu njengoba lezi zingasakwazi ukufinyelelwa kubo njengoba zifakwe ngaphansi kongqimba lweqhwa ebusika. Iqhwa eliwela ezindaweni ezineqhwa elivimbela lezi zilwane ukuthi zingondli.
Indlala ingadala isisu, noma yenze ukuthi ingane izalwe isisindo esiphansi kakhulu kunokujwayelekile, kangangoba Ama-reindeer angama-61.000 abulawe yindlala e-Peninsula yaseYamal kuphela, eSiberia, ngesikhathi sasebusika sika-2013 kuya ku-2014 ngenxa yemvula enamandla eqhweni.
Leli thimba belilandela umkhondo wezinyamazane i-Arctic kusukela ngo-1994, liyithatha futhi liyikala lisukela ezinyangeni eziyishumi ubudala, indlela elalilandela njalo ebusika kanye naleyo elalilisebenzisa ukubuyisa unyaka olandelayo licabangela ubukhulu balo nesisindo salo.
Ungafunda isifundo esigcwele lapha (ngesiNgisi).