Umgangatho wamanzi uchaphazela ukufumaneka kweendawo zokuhlala ezona zokutya kwiintaka zasemanzini ezisesichengeni

Ijenali:I-Ecology kunye ne-evolution, i-7 (23), iphe.10440-10450.

Iintlobo (Intaka):Irhanisi elimhlophe elingaphambili (Anser albifrons), Aswan goose (Anser cygnoides)

Inkcazo:

Imigxobhozo ebanzi yexesha elithile kwiLake lasePoyang, edalwe lutshintsho olumangalisayo lwamaxesha onyaka kwinqanaba lamanzi, iyinxalenye yesiza sobusika seAnatidae efudukela eTshayina. Ukuncitshiswa kommandla omanzi ngexesha leminyaka eli-15 edlulileyo kukhokelele kwizindululo zokwakha iDama lasePoyang ukuze kugcinwe amanqanaba aphezulu amanzi asebusika ngaphakathi kwechibi. Ukutshintsha inkqubo yendalo yokusetyenziswa kwamanzi kuya kuchaphazela iintaka zamanzi ezixhomekeke kutshintsho lwenqanaba lamanzi ngokufumaneka kokutya kunye nokufikeleleka. Silandelele iintlobo ezimbini zerhanisi ezineendlela ezahlukeneyo zokutyisa (amarhanisi amakhulu amhlophe ngaphambili i-Anser albifrons [iintlobo zedlelo] kunye ne-swan geese Anser cygnoides [iintlobo ze-tuber-feeding]) ngexesha lobusika obubini obunamanqanaba ahlukileyo amanzi (ukudodobala okuqhubekayo ngo-2015; amanzi aphezulu agciniweyo ngo-2016, afanayo notshintsho oluqikelelweyo lwamanzi eDamgat , olusekwe kwiziphumo eziqikelelweyo zotshintsho lwamanzi ePoyang). kwizityalo kunye nokuphakama. Ngo-2015, amarhanisi angaphambili amhlophe axhaphaze kakhulu ii-mudflats ezenziwe ngokulandelelanayo, esitya iigraminoid ezimfutshane ezinomsoco, ngelixa amarhanisi e-swan egrumba ama-substrates ecaleni komda wamanzi esenzela ii-tubers. Le ecotone ibaluleke kakhulu ibonakalisa ngokulandelelana ukutya kwe-subaquatic kwaye ixhasa ukukhula kwegraminoid kwangethuba ngexesha lokudodobala kwamanzi. Ngexesha lokugcinwa kwamanzi aphezulu ngo-2016, zombini ezi ndidi zikhethile iindawo ezinodaka, kodwa nakwiqondo elikhulu leendawo zokuhlala ezineegraminoid zexesha elide ezisekiweyo ngenxa yokuba ukufikelela kwiibhubhu kunye nokukhula okutsha kwegraminoid bekuthintelwe phantsi kweemeko zamanzi aphezulu. Ii-graminoid sward ezisele zisekiwe zibonelela ngefula enengeniso enganeno yamandla kuzo zombini iintlobo. Unciphiso olumandla kwindawo yokuhlala efanelekileyo kunye nokuvalelwa kwifula enengeniso encinane ngamaqondo aphezulu amanzi kunokwenzeka ukunciphisa amandla amarhanisi ukuqokelela iindawo zokugcina amafutha awoneleyo okufuduka, kunye neziphumo ezinokuthi ziqhubele phambili ekuphileni nasekuveliseni okulandelayo. Iziphumo zethu zibonisa ukuba amanqanaba aphezulu amanzi e-Poyang Lake kufuneka agcinwe ngexesha lasehlotyeni, kodwa avunyelwe ukuba ahle kancinci, aveze iindawo ezintsha ebusika bonke ukubonelela ngokufikelela kwiintaka zasemanzini kuzo zonke imibutho etyisayo.