摘要
2001年8月末至10月扎龙自然保护区50%的核心区芦苇被火烧掉,2002年3月初再次着火,2002年4月中旬开始陆续向湿地注入3亿m3水以解决保护区缺水问题.为了研究火烧与注水对丹顶鹤营巢的影响,我们于2002年的3～5月份,在保护区内用GPS和因子测定法对12对野生丹顶鹤的巢进行了巢址定位和巢址选择的研究.结果表明:(1)丹顶鹤对高度(t=3.42975)较大的剩余苇丛(t=29.32015)和明水面(t=4.20508)具有很大的选择性;(2)植被类型是丹顶鹤巢址选择的一个重要影响因子,频率最高的是芦苇沼泽(66 67%);(3)与火烧地的距离(t=2.20846)制约着丹顶鹤巢址的选择,但不排除在火烧地内营巢的情况;(4)巢下水深(t=2.31098)、与人为干扰地的距离(t=1.08284)及植被的密度(t=0.26543)也对丹顶鹤巢址的选择有一定程度的影响.
After a big fire from August to October of 2001,50% of the core zone in Zhalong Nature Reserve was burned;In the early March of 2002,the reserve was burned again.From the middle of April 2002,300 000 000 m3 of water was continuously irrigated to wetland.To determine the impact on nest-site selection of Red-crowned crane by the burning and water flooding,a research on the nest-site positioning and selection of Red-crowned crane was conducted in Zhalong Nature Reserve by GPS and factor measurement.The results show that(1)the most important factors on Red-crowned crane nest-site selection are the taller(t=3.429 75) surplus reeds(t=29.320 15) and lakeside(t=4.205 08).(2)Vegetation type also is the important factor of the nest-site selection,the most preference cover type is reed-marsh(66.67%).(3)The distance to burned area(t=2.208 46) also restricts the nest-site selection of Red-crowned crane,but the Red-crowned cranes possibly build nests in burned area.(4)The water depth under the nest(t=2.310 98),the distance to human disturbance area(t=1.082 84),vegetation coverage (t=0.265 43)have close relation to nest-site selection of Red-crowned crane.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
北大核心
2003年第1期54-59,共6页
Journal of Northeast Normal University(Natural Science Edition)
基金
黑龙江省博士后基金资助项目(000415021)
