加拿大哈德逊湾北极熊种群数量急剧下降

新闻简报:2022年12月27日

努勒维特政府与北极科学家合作,于 12 月底发布了一份评估报告,发现哈得逊湾的北极熊数量在过去五年中减少了 27%,比预计的要快得多。位于哈得逊湾西部的丘吉尔镇是北极熊活动频繁的地区。每年秋天,北极熊都会经过丘吉尔迁徙,返回海冰,在那里它们会花几个月的时间捕食海豹。迅速变暖和海冰消失会减少北极熊和北极地区许多其他物种的食物供应和栖息地。虽然成年雄性北极熊的数量保持稳定,但近年来幼年和成年雌性北极熊的数量却急剧下降。这些发现表明,北极熊并没有简单地改变栖息地;相反,每年存活下来的幼熊数量越来越少,使得老化的北极熊种群很容易受到死亡率上升的影响。北极变暖的速度是全球平均速度的四倍,北极熊等物种提供了一个非常明显的迹象,即持续变暖和冰冻圈的丧失将极大地削弱现有的极地生态系统。.

https://www.arctictoday.com/canadas-hudson-bay-polar-bear-population-plummets-as-climate-change-warms-the-arctic/

帕姆·皮尔森

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