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Nitrate-yada ku urura ciidda u dhow webiyada ayaa door muhiim ah ka ciyaara kordhinta heerka Nitrate-ka ee biyaha webiga inta lagu jiro roobabka, cilmi-baarayaal ka socda Jaamacadda Nagoya ee Japan ayaa sheegay.Natiijooyinkooda, oo lagu daabacay joornaalka Biogeoscience, ayaa kaa caawin kara yaraynta wasakhowga nitrogen iyo hagaajinta tayada biyaha ee meelaha hoose ee biyaha sida harooyinka iyo biyaha xeebaha.
Nitrate-ku waa nafaqo muhiim u ah dhirta iyo phytoplankton, laakiin heerka sare ee Nitrate-yada ee wabiyada waxay hoos u dhigi kartaa tayada biyaha, waxay u horseedaa eutrophiation (kor u kaca biyaha ee nafaqooyinka), waxayna khatar ku tahay caafimaadka xoolaha iyo dadka.Inkastoo heerka Nitrate-ka ee durdurrada la og yahay inuu kor u kaco marka roobabku da'aan, ma cadda sababta.
Waxaa jira laba aragtiyood oo waaweyn oo ku saabsan sida ay Nitrate-ku u korodho marka roobabku da'aan.Marka loo eego aragtida koowaad, Nitrates atmospheric waxay ku milmaan biyaha roobka waxayna si toos ah u galaan durdurrada.Aragtida labaad ayaa ah in marka uu roobku da'o ay ciidda Nitrate-ka ee ku taal dhulka wabiga xuduudka la leh ee loo yaqaano aagga riparian ay galaan biyaha webiga.
Si loo sii baaro isha Nitrate-ka, koox cilmi baaris ah oo uu hoggaaminayo Professor Urumu Tsunogai oo ka tirsan Dugsiga Sare ee Daraasaadka Deegaanka, oo kaashanaya Xarunta Aasiya ee Cilmi-baarista Wasakhowga Hawada, ayaa sameeyay daraasad lagu falanqeynayo isbeddellada ka kooban nitrogen iyo isotopes oxygen Nitrate-ka iyo xilliga roobabka culus.Kordhinta uruurinta Nitrate-ka ee webiyada.
Daraasado hore ayaa sheegay in koror aad u weyn uu ku yimid uruurinta Nitrate-ka inta lagu jiro dabeylaha ka socda wabiga sare ee wabiga Kaji ee Ismaamulka Niigata ee waqooyi-galbeed Japan.Cilmi-baadhayaashu waxay ka soo ururiyeen muunado biyo ah biyo-qabatinka Kajigawa, oo ay ku jiraan durdurrada ka sarreeya wabiga.Intii lagu guda jiray seddexda duufaan, waxay isticmaaleen autosamplers si ay muunad uga qaadaan durdurrada biyuhu saacad kasta 24 saacadood.
Kooxdu waxay cabbireen fiirsashada iyo isku-dhafka isotopic ee Nitrate-yada ee ku jira biyaha qulqulka, ka dibna waxay barbar-dhigeen natiijooyinka iyo uruurinta iyo isku-dhafka isotopic ee Nitrate-ka ee ciidda ku yaal aagga xeebta ee qulqulka.Natiijo ahaan, waxay ogaadeen in Nitrate-yada intooda badani ay ka yimaadaan ciidda oo aanay ka iman biyaha roobka.
"Waxaan ku soo gabagabeynay in dhaqidda Nitrate-ka xeebaha ee loo maro durdurrada sababtoo ah kor u kaca heerarka qulqulka iyo biyaha dhulka hoostiisa ayaa ah sababta ugu weyn ee kororka Nitrate-ka ee durdurrada xilliga duufaanka," ayuu yiri Dr. Weitian Ding oo ka tirsan Jaamacadda Nagoya, qoraaga daraasadda.
Kooxda cilmi-baaristu waxay sidoo kale falanqeeyeen saameynta nitrate-ka atmospheric ee kororka qulqulka nitrate inta lagu jiro duufaannada.Waxa ku jira Nitrate atmospheric biyaha webiga ayaan is beddelin, inkasta oo roobabku ay kordheen, taas oo muujinaysa saamayn yar oo ilaha Nitrates atmospheric.
Cilmi-baarayaashu waxay kaloo ogaadeen in Nitrate-ka ciidda xeebaha ay soo saaraan microbes-ka ciidda."Waxaa la rumeysan yahay in Nitrate-yada asal ahaan ka soo jeeda microbial ay ku ururaan carrada xeebaha kaliya xagaaga iyo deyrta ee Japan," ayuu yiri Professor Tsunogai."Marka loo eego dhinacan, waxaan saadaalin karnaa in kororka Nitrate-ka ee wabiga da'da roobabku ay dhici doonto oo keliya xilliyadan."
Tixraac: Dean W, Tsunogai W, Nakagawa F, iyo al.Dabagalka isha Nitrate-ka ee durdurrada kaynta ayaa muujisay xajmiyo sarreeya inta lagu jiro dhacdooyinka duufaannada.Cilmiga noolaha.2022;19 (13):3247-3261.doi: 10.5194/bg-19-3247-2022
Maqaalkan waxaa laga soo saaray walxahan soo socda.Ogow.Soo gudbinta waxa laga yaabaa in loo tafatiray dhererka iyo nuxurkaWixii macluumaad dheeraad ah, eeg isha la soo xigtay.