Inkomba entsha esekelwe kwisathelayithi yokuhlonza izindawo zokudla ezitholakala endaweni ethile zezinyoni zasemanzini ezidla uhlaza.

Ijenali:Izinkomba Zemvelo, 99, amakhasi 83-90.

Izinhlobo (zezinyoni):Ihansi elimhlophe elingaphambili elikhulu (i-Anser albifrons)

Isifinyezo:

Ukusatshalaliswa kwezinsiza zokudla kuyisici esibalulekile ekukhetheni izindawo zokuhlala. Izinyoni zasemanzini ezidla uhlaza zithanda izitshalo ezikhula esigabeni sokuqala (kusukela ekuqaleni kokukhula kwezitshalo kuya esicongweni se-biomass yezakhamzimba) njengoba lezi zinikeza amazinga aphezulu okudla amandla. Lesi sigaba sokuthuthukiswa kwezitshalo asithathwa ngokugcwele yizinkomba zezitshalo ezisetshenziswa ngesathelayithi, ezigxila ku-biomass yezitshalo (isb., Inkomba Yemifino Ethuthukisiwe, i-EVI) noma ukukhula kwezitshalo okusebenzayo (isb., i-EVI ehlukile phakathi kosuku lwamanje nolwangaphambilini, i-diffEVI). Ukuze sithuthukise ukumaka izindawo ezifanele zokudla izinyoni zasemanzini ezidla uhlaza, siphakamisa inkomba entsha yokukhula kwezitshalo esekelwe kwisathelayithi yokukhula kwezitshalo esigabeni sokuqala (i-ESPG). Sicabanga ukuthi izinyoni zasemanzini ezidla uhlaza zithanda izitshalo esigabeni sokuqala sokukhula ngesikhathi sokukhula futhi sikhetha izitshalo ezine-ESPG esekupheleni kwesikhathi ngesikhathi esingakhuli. Sisebenzisa idatha yokulandelela isathelayithi yamahansi angama-20 amakhulu amhlophe (i-Anser albifrons) ahlala ebusika endaweni echichimayo yoMfula iYangtze ukuze siqinisekise izibikezelo zethu. Sakha amamodeli aqondile ajwayelekile okusatshalaliswa kwamahansi ngesikhathi sonyaka sokukhula kanye nokungakhuli futhi siqhathanisa ukusebenza kwe-ESPG nezinkomba zokukhula kwezitshalo ezisetshenziswa njalo (i-EVI kanye ne-diffEVI). Ngesikhathi sonyaka sokukhula, i-ESPG ingachaza u-53% wokwehluka kokusatshalaliswa kwamahansi, idlula i-EVI (27%) kanye ne-diffEVI (34%). Ngesikhathi sonyaka sokukhula, ukuphela kwe-ESPG kuphela okuthonya kakhulu ukusatshalaliswa kwamahansi, kuchaza u-25% wokwehluka (i-ESPG: AUC = 0.78; i-EVI: AUC = 0.58; i-diffEVI: AUC = 0.58). Inkomba yokukhula kwezitshalo esanda kuthuthukiswa i-ESPG ingasetshenziswa ukuthuthukisa amamodeli okusatshalaliswa kwezinyoni zasemanzini ezidla uhlaza futhi ngaleyo ndlela isekele imizamo yokulondolozwa kwezinyoni zasemanzini kanye nokuphathwa kwezindawo ezimanzi.