Nepo zvidzidzo zvakawedzera kuti kudziya kwepasirese kunotungamira kune kusanaya yakanyanya kuoma, yakareba uye inowanzoitika, ikozvino kune imwezve ongororo isingabvumirane nedzidziso iyoyo. Iyi imwe yakaitwa pamwe chete neUniversity of California kuIrvine neYunivhesiti yeWashington, uye iyo yakaburitswa mumagazini yesainzi Proceedings of the National Academy of Sciences (PNAS).
Sekureva kwevanyori, kukosheswa kwakanyanya kwekabhoni dhayokisaidhi inobvumira zvirimwa kuchengetedza mvura yakawanda muvhu, kuti vakwanise kuchinjika kumatembiricha akakwirira.
Kusvika pari zvino, hunhu hwemuchadenga chete (tembiricha, hunyoro, kunaya) hwaifungidzirwa kuongorora kusanaya kwemvura, sezvakaita nePalmer Drought Severity Index. Iine indekisi iyi, zvave kufungidzirwa kuti inopfuura 70% ichawana kusanaya kwemvura kana mumakore zana kuburitsa CO2 kuchipetwa neina enguva yepamberi kwemaindasitiri. Nekudaro, kana ruzivo rwekushandiswa kwemvura nemiti rukasanganiswa, kukosha uku kunowira ku 37%, sei?
Carbon dioxide yakakosha pamiti. Pasina iyo, ivo vaisakwanisa photosynthesize uye ivo vaisakwanisa kukura. Kuti vapinze, vanovhura zvivakwa zvavanazvo mumashizha anonzi stomata, asi iri idambudziko, sezvo richirega hunyoro kubuda. Kunyangwe mamiriro acho achichinja kana paine yakawanda CO2 iripo mumhepo kubvira stomata haidi kuvhurika kwenguva refu kudaro, uye semhedzisiro, kurasikirwa kwemvura kushoma.
Zvakadaro, kana kusanaya kwemvura kukaitika panguva yekudziya, zvinouraya. Zvirimwa zvinopera simba, uye mukuita kudaro zvipukanana zvinozviuraya mune mazuva mashoma kwazvo. Nekudaro, kunyangwe paine kushoma kwekusanaya kwemvura, kunogona kuva nemhedzisiro.
Unogona kuverenga chidzidzo chakazara pano (muChirungu).