2001～2008年中华秋沙鸭弋阳越冬区种群数量的变化

2001～2008年,通过对江西省上饶市弋阳越冬区中华秋沙鸭种群数量和越冬区生态因子进行研究,结果发现,2001～2005年间,中华秋沙鸭的种群数量在逐渐减少:而在2006～2008年间,又呈显著增加的变化趋势.且中华秋沙鸭在越冬区的生活不稳定,常沿河流逐步迁徙,只作短暂停留,越冬区的范围分布较散.越冬区生态因子的改变和人为干扰是其种群数量下降的主要原因,而其生境的改善和食物来源的丰富与其种群数量的增加有着密切的关系.

Study on Population Quantity of Mergus squamatus in Yiyang Wintering Habitat from 2001 to 2008

Population change of Mergus squamatus and zoology factors of habitat were studied in Yiyang wintering habitat,Shangrao city,Jiangxi province from 2001 to 2008. The results showed that M. squamalus population had declined slowly from 2001 to 2005,but increased remarkably from 2006 to 2008. They lived in wintering habitat unstably,always migrated along the riverside and settled shortly. Their wintering habitat was distributed dispersedly. The important factors contributing to the M. squamatus population decline were change of wintering habitat zoology factors and man-made disturbance. The improvement of its living condition and the enrichment of its food source both had consanguineous relation with its population quantity.