浙江湿地水鸟种群数量研究

1997年4月至1999年7月，采用系统抽样技术和样带法、样点法对浙江省湿地水鸟种群数量进行了研究。其间共记录到湿地水鸟97种，隶属于7目13科，其中赤颈鸊鷉、小滨鹬和阔嘴鹬3个种为浙江省分布新记录。浙江省湿地水鸟以冬候鸟为主，占53.6％。湿地水鸟的估计总量为92.6×104只，数量在万只以上的有25种，其中以黑腹滨鹬数量最多，海岸湿地水鸟的种群密度明显高于大陆和岛屿湿地水鸟，种群密度超过1.0只/km2的种类多达21种，岛屿湿地水鸟种群密度超过1.0只/km2的有5种，而所有大陆湿地水鸟的种群密度均未超过1.0只/km2。乐清湾和温州湾滩涂湿地是黑嘴鸥的最重要越冬地和黑脸琵鹭的主要迁徙停歇地。

Studies on the populationnumber of waterfowls in Zhejing Province

The population number, density and diversity of waterfowls in Zhejiang Province were surveyed from April 1997 to July 1999, with the systematic sampling, line transect and point count methods. 7 orders, 13 families and 97 species of waterfowl with 53.6% winter visitors were recorded. Podiceps grisegena, Calidris minuta and Limicola falcinellus were found as new records in Zhejiang Province. About 92.6×104 individuals was estimated as the total number of waterfowls in Zhejiang based on the density survey. Among these waterfowls, the number of Calidris alpina was highest and there were 25 species that population number was more than 10 000 individuals. The population densities of waterfowls in the area of sea coast were higher than in the areas of continent and island. In sea coast area, there were 21 species that density was more than 1.0 ind./km2 and 5 species in island area. There was, however, no any species that density was over 1.0 ind./km2 in continent area. The intertidal mud wetlands on the coast of Zhejiang, particularly in the areas of Wenzhou Bay and Yueqing Bay were very important areas not only for Ptatalea minor to use as stopover sites, but also for Larus saundersi to use as wintering sites.