Analyses of variation in quantity of Jankowski's Bunting
Analyses of variation in quantity of Jankowski's Bunting
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发表时间：
2002
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通讯作者：
Che Jin-rui
中科院分区：
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作者：
Che Jin-rui
1999 ~ 2001年对吉林省西部地区的黄嘴黑腹鹀种群数量及繁殖情况进行了调查，结果表明，扬科夫斯基氏鹀种群数量下降的原因有两个：一是人为干扰，降低了繁殖成功率和存活率温度升高（R2 = 0.996 4）和降水量减少（R2 = 0.849 8）是导致扬子鸡种群数量下降的主要气候因子。
After having investigated the population quantity of Jankowski's Bunting and their breeding in the west of Jilin Province during the period from 1999 to 2001,found that the population quantity of this kind of bird had continued decreasing.The analyses suggested that there were two reasons for the decline in the quantity of Jankowski's Bunting population.One was human disturbance which reduced the breeding success rate and survival rate.The other was the continuously high temperature and droughty climate in this area since 1999.The rising of temperature(R 2=0.996 4)and the decreasing of precipitation(R 2=0.849 8)were the main climate factors which cause the decline in the quantity of Jankowski's Bunting population.