Matsayin ruwa yana shafar samuwar wuraren da tsuntsayen ruwa masu ƙaura ke samun abinci mafi kyau

Mujalla:Ilimin Halittu da Juyin Halitta, 7(23), shafi na 10440-10450.

Nau'in Avian (Avian):Babban tsuntsu mai farin gaba (Anser albifrons), Aswan goose (Anser cygnoides)

Takaitaccen Bayani:

Manyan wuraren dausayi na dindindin a Tafkin Poyang, waɗanda aka ƙirƙira sakamakon canje-canjen yanayi a matakin ruwa, sune babban wurin da za a yi hutun hunturu ga masu ƙaura daga Anatidae a China. Rage yawan yankunan dausayi a cikin shekaru 15 da suka gabata ya haifar da shawarar gina Madatsar Ruwa ta Poyang don kiyaye yawan ruwan hunturu a cikin tafkin. Sauya tsarin ruwa na halitta zai shafi tsuntsayen ruwa waɗanda suka dogara da canje-canjen matakin ruwa don wadatar abinci da isa gare su. Mun binciki nau'ikan goose guda biyu tare da halaye daban-daban na ciyarwa (manyan geese Anser albifrons [nau'in kiwo] da swan geese Anser cygnoides [nau'in ciyar da bututu]) a lokacin hunturu biyu tare da matakan ruwa daban-daban (koma bayan tattalin arziki a 2015; ci gaba da ruwa mai yawa a 2016, kama da waɗanda aka annabta bayan Madatsar Ruwa ta Poyang), suna binciken tasirin canjin matakin ruwa akan zaɓin mazauninsu bisa ga shuke-shuke da tsayi. A shekarar 2015, tsuntsayen da ke da fararen fata sun yi amfani da su wajen ƙirƙirar laka, suna cin ƙananan graminoids masu gina jiki, yayin da tsuntsayen da ke da ƙananan gada suka tono ƙananan gada a gefen ruwa don samun buds. Wannan yanayi mai mahimmanci na halitta yana fallasa abinci mai zurfi a cikin ruwa a jere kuma yana tallafawa ci gaban graminoid a matakin farko a lokacin koma bayan tattalin arziki na ruwa. A lokacin da ake da yawan ruwa a shekarar 2016, nau'ikan biyu sun zaɓi laka, amma kuma zuwa mafi girman matsuguni tare da tsaunukan graminoid na yanayi mai tsayi saboda an takaita samun damar samun tubers da sabbin graminoids a ƙarƙashin yanayin ruwa mai tsayi. Guraben graminoid da suka daɗe suna ba da abinci mai ƙarancin riba ga nau'ikan biyu. Rage yawan matsuguni da kuma killacewa ga abinci mai ƙarancin riba ta hanyar yawan ruwa mai yawa yana iya rage ikon geese na tara isassun wuraren adana mai don ƙaura, tare da yuwuwar tasirin ɗaukar kaya akan rayuwa da haifuwa daga baya. Sakamakon bincikenmu ya nuna cewa ya kamata a ci gaba da kiyaye yawan ruwan da ke cikin tafkin Poyang a lokacin bazara, amma a bar shi ya ragu a hankali, wanda hakan ke fallasa sabbin wurare a duk lokacin hunturu don samar da damar shiga ga tsuntsayen ruwa daga dukkan ƙungiyoyin da ke ciyar da su.