Coral bleaching a cikin Oahu
 Coral bleaching a cikin Oahu |
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Murjani bleaching a Oahu ya kasance yana ƙaruwar tun 1996, lokacin da babban bleaching na farko na Hawaii ya faru a Kaneohe Bay, sannan manyan abubuwan da suka faru a tsibirin Arewa maso yamma a 2002 da 2004. Acikin 2014, masana ilimin halittu daga Jami'ar Queensland sun lura da taron bleaching na farko, kuma sun danganta shi ga Blob.[1]
Bleaching na murjani yana mayar da murjani fari, amma ba ya kashe shi nan da nan. Dangane da dalilai kamar wane nau'in murjani ne, da zafin ruwa acikin takamaiman yanki, yanke shawarar tsawon lokacin da murjani yake da shi. Sakamakon bleaching na coral acikin Hawaii na faruwa ne da farko sakamakon karuwar zafin ruwa saboda canjin yanayi. Yunƙurin zafin ruwa yana haifar da damuwa ga murjani. Lokacin da aka damu, murjani yana sakin algae dake rayuwa acikin ƙyallen jikinsu, don haka idan aka saki su sun rasa dukkan launi, suna mayar da su fari.[2]
Wuraren da bleaching na murjani ya shafa
[gyara sashe | gyara masomin]Adadin murjani bleached yana karuwa a kusa da tsibirin Oahu. Tun daga watan Nuwamba na 2019, rairayin bakin teku guda biyu da ke tsibirin,Yokohama bay da bakin tekun Makua sun sami rahotannin murjani bleaching. Har'ila yau ciki har da kusa da filin jirgin sama na Daniel K.Inouye, waɗannan yankunan suna da 75% ko fiye na murjani bleached. Babban abin da ke haifar da wannan babban taron bleaching shine ta hanyar haɓakar zafin ruwan da bai kai digiri biyu zuwa uku na Fahrenheit ba.Nau'in murjani sun haɗada mashahuran murjani guda biyu na Hawaii, Coral Rose ko Farin kabeji. Waɗannan murjani suna 10–20 inches (250–510 mm) a diamita.[1]
Kaneohe Bay Reef
[gyara sashe | gyara masomin]Kogin Kāne'ohe Bay yana da 8 miles (13 km) tsayi da 2.7 miles (4.3 km) a faɗin. Ruwan shinge na biyu ya rufe 27 miles (43 km) kusa da bakin tekun tsibirin Molokaʻi acikin tsibiran.Kimanin shekaru 40 da suka gabata an sami danyen zubar da ruwa a Kaneohe Bay, wanda ya kashe wasu murjani. Ruwan najasa ya ba da fa'ida ga nau'in algae mai girma. Koren algae Dictyosphaeria cavernosa, ya samar da tabarma kamar tsarin da ke rufewa da kashe wasu murjani.[3]Kuma murjani da algae ba su kai ba,najasa da ƙarancin ingancin ruwa sun raunana su a tsawon lokaci. An sassauta zagayowar haifuwar murjani kuma mafi kusantar kamuwa da cuta.[1] In 1996, when coral bleaching started to Kaneohe Bay, the corals were effected by the algae growth.In 1996,when coral bleaching started to Kaneohe Bay, the corals were effected by the algae growth. In 1996,when coral bleaching started to Kaneohe Bay,the corals were effected by the algae growth.It is predicted by Kuulei Rogers of the Cibiyar Nazarin Halittar Ruwa ta Hawai'i ya annabta cewa "Acikin 2030s,30 zuwa 50 bisa dari na shekaru zasu sami manyan abubuwan bleaching a Hawaii."</link></link>