Tashi tsutsa daga cikin halittar Chaoborus sp
Kodayake har zuwa yanzu ana tsammanin shanun ne kawai dabbobi, ban da mutane, waɗanda ke da tasiri a kan ɗumamar yanayi, yanzu masana kimiyya sun gano wasu da suka ba su mamaki: Chaoborus tashi larvae.
Waɗannan halittu suna rayuwa a cikin dogaye da kandami, suna ciyar da ƙwayoyin sauro har sai sun zama manya kuma sun bar ruwan suna haihuwa kuma jim kaɗan bayan sun mutu, tunda ko dai basa ciyarwa, ko kuma suna yin hakan ne da ruwan dare.
Wani binciken da aka buga a cikin »Rahoton kimiyya», Wanda ƙungiyar masana kimiyya daga Jami'ar Geneva (Switzerland) suka gudanar tare da haɗin gwiwar Leibniz Institute for Freshwater Ecology da Inland Fisheries in Berlin (IGB), sun gano cewa Chaoborus da ke tashi daga larvae suna amfani da iskar methane suna fitar da ita cikin ruwa.
Wadannan tsutsa, wadanda da rana suke boye a cikin daskararren tabkin, da daddare suna cika kananan bishiyoyin su da iskar oxygen kuma suna tashi sama don neman abinci. Koyaya, masana sun gano a wani zurfin ruwa, matsin ruwan yana da yawa har yana hana waɗannan jakunkunan cika, wanda ke haifar larvae sun nemi mafaka daga methane da aka samo a cikin kurar don cika su da amfani dasu da kuma "shawagi".
Hoton - UNIGE
Godiya ga wannan dabarun rayuwa, tsutsa na iya adana har zuwa kashi 80% na makamashi, don haka suna buƙatar ƙarancin abinci. Amma wannan yana haifar da matsala: Methane iskar gas ce wacce take faruwa a hankali a cikin abubuwan da ke cikin layin, amma idan larvae suka yi amfani da su don motsa kansu, sai ya narke a cikin ruwa. Ta yin hakan, zai iya kaiwa ga yanayi, yana ba da gudummawa ga ɗumamar yanayi.
Shi ya sa, masana sun danganta kashi 20% na hayakin methane zuwa ruwa mai tsafta. Yawan kwayar halittar Chaoborus a cikin tabkuna ya fara ne daga 2000 zuwa mutane 130.000 a kowace murabba'in mita. Don hana yaduwar sa, kuma ba zato ba tsammani a rage adadin methane da ake fitarwa zuwa sararin samaniya, marubutan sun ba da shawarar a yawaita sarrafa ruwan tafki, da kuma wadancan hanyoyin da ke da alhakin fitar da methane.