Iingcambu zomthi zingaphantsi komhlaba, zinika amalungu omthi angaphandle komhlaba ukomelela, kwaye apha emhlabeni zitsala [[amanzi] kunye neenezakha mzimba ezifunwa ngumthi. Imithi emininzi ifuna uncedo lweenkowane ukuze ikwazi ukuzifunxa kakuhle izakha mzimba ezifunwa ngumthi: le ke kuthiwa yimycorrhiza. Uninzi lweibiomass yomthi luvela kwicarbon dioxide ekuziwe nayo emoyeni (jonga photosynthesis). Ngaphezu komhlaba, isiqu somthi siwunika umphakamo umthi ukuya kumasebe awo ekukhula kuwo amagqabi, ekhuphisana kunye nezinye iintsapho okanye iintlobo ngokufumana iukukhanya kwelanga. Kwimithi emininzi, ukulandelelana kwamasebe kwenza ukuba amagqabi avelele elangeni kangcono.