Jarida:Halittar Ruwan Ruwa, 64 (6), shafi 1183-1195.
Nau'o'i (Avian):Goose Wake (Anser fabalis), Karami fari mai gaba-gaba (Anser erythropus)
Takaitawa:
Matsakaicin saurin canjin muhalli da ɗan adam ke haifar yana haifar da ƙalubale ga namun daji. Ƙarfin namun daji don daidaitawa da sauye-sauyen muhalli yana da sakamako mai mahimmanci don dacewa, tsira, da haifuwa. Sassaucin ɗabi'a, daidaitaccen ɗabi'a nan da nan don mayar da martani ga sauye-sauyen yanayi, na iya zama mahimmanci musamman don jurewa canjin ɗan adam. Babban makasudin wannan binciken shine a ƙididdige martanin jinsunan Goose na hunturu guda biyu (wake Goose Anser fabalis da ƙaramin farin gaban Goose Anser erythropus) zuwa rashin kyawun muhalli a matakin yawan jama'a ta hanyar nazarin halayen kiwo. Bugu da kari, mun gwada ko filastik hali na iya canza alkuki na trophic. Mun siffata halayen kiwo da ƙididdige kewayon gida na yau da kullun (HR) na geese ta amfani da bayanan tsarin sa ido na duniya. Mun ƙididdige daidaitattun wuraren ellipse don ƙididdige niche niche ta amfani da ƙimar δ13C da δ15N na kowane geese. Mun haɗu da filastik ɗabi'a tare da ingancin wurin zama ta amfani da samfurin ANCOVA (binciken covariance). Mun kuma gwada alaƙa tsakanin daidaitattun wuraren ellipse da HR ta amfani da samfurin ANCOVA. Mun sami bambance-bambance masu mahimmanci a cikin halayen kiwon geese tsakanin shekaru a yankin su na yau da kullun, nisan tafiya da sauri, da kusurwar juyawa. Musamman, tsuntsayen sun kara yawan wuraren kiwon su don biyan bukatunsu na makamashin yau da kullun don mayar da martani ga rashin kyawun muhalli. Sun fi tashi da sauri kuma suna tafiya cikin sauri da nisa a kullum. Don ƙaramar goshin fari mai fuskantar haɗari, duk masu canjin ɗabi'a suna da alaƙa da ingancin wurin zama. Don Goose wake, HR kawai da kusurwar juyi sun kasance masu alaƙa da ingancin wurin zama. Tsuntsaye, musamman ma ƙarami mai farar gaba, mai yiwuwa sun sami matsayi mafi girma a cikin yanayi mara kyau. Abubuwan da muka gano sun nuna cewa geese na hunturu sun nuna babban matakin filastik hali. Koyaya, ƙarin halaye masu fa'ida a ƙarƙashin mummunan yanayin wurin zama bai haifar da mafi girman niche na trophic ba. Samuwar wurin zama na iya zama alhakin martani daban-daban na HR don samar da abinci da isotopic niche ga canjin muhalli wanda ɗan adam ya haifar. Don haka, kiyaye tsarin tsarin ruwa na yanayi a cikin lokaci mai mahimmanci (watau Satumba-Nuwamba) don tabbatar da cewa akwai albarkatun abinci mai inganci shine tsakiyar makomar al'ummar geese a cikin Gabashin Asiya-Australasian Flyway.
ANA BUGA A NAN:
doi.org/10.1111/fwb.13294
