黄河三角洲水鸟种群动态变化

摘要

2008年1月至2009年12月,在黄河三角洲地区以每月一次的调查频度对水鸟开展连续两年的调查,共记录到水鸟107种,累计403992只次,其中2008年调查水鸟102种,数量256385只次,2009年调查水鸟106种,数量147607只次。受威水鸟2008年度11种,17604只次,2009年度12种,10695只次。水鸟种群数量在3～5月和10～12月为高峰值,呈双曲线变化,种类4月和10月最多。2009年1～2月极度严寒的天气影响了水鸟的数量,导致数量锐减,并持续影响到2009年。最后,论文还分别对雁鸭类、秧鸡类、鸻鹬类、鸥类、鹭类、鹤类、鹳类等重点水禽种群变化进行了分析。%A total of 403992 counts in 107 species were recorded in the monthly waterbird surveys in yellow river delta from January 2008 to December 2009.256385 counts in 102 species were recorded in 2008 and 147607 counts in 106 species in 2009.Threatened species recorded were 17604 counts in 11 species in 2008 and 10695 in 12 species in 2009.The high population number happened during March to May and during October to December which shows a hyperbola trend.The high number of species is in April and October.The cold climate in January and February 2009 affected waterfowl directly which lead to species and number fell down sharply.In the end,this article analyzed important waterfowl change,such as geese and ducks,rails,shorebirds,gulls,herons,cranes and storks.