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海冰度下降在一个重要的阿德利企迁移区

Annie E Schmidt¹, Amélie Lescroël¹, Simeon Lisovski²

¹Point Blue Conservation Science, Antarctica Program, Petaluma, CA 94954.

Proceedings of the National Academy of Sciences of the United States of America

|November 6, 2023

概括

罗斯海的高海冰度 (SIC) 对于阿德丽企的变至关重要. 在关键变区的SIC下降可能会对企的生存率和回归率产生负面影响.

科学领域:

海洋生物学海洋生物学
生态生态学生态生态学
气候变化影响气候变化影响

背景情况:

尽管区域海冰增加,罗斯海的阿德丽企种群稳定或增加.
海冰度 (SIC) 以复杂的方式影响阿德利企的人口统计.
阿德丽企每年在海冰上,这是一个关键的,但研究不足的时期.

研究的目的:

测试假设持续高SIC区域作为阿德丽企的基本变息地.
为了研究海冰状况与阿德丽企在变期间的生存之间的关系.

主要方法:

在三年 (2017-2019) 的时间里,在195只成年阿德利企身上部署了地理定位潜水记录器.
通过分析繁殖后潜水活动缺口,确定了变期.
与远程感知SIC数据相关的企回归率,在20年内确定了变区.

主要成果:

在罗斯海中确定了阿德丽企的两个关键变区.
在研究期间观察到异常低的SIC,自1980年以来,初级产区的长期下降.
发现SIC在变毛区和企回归殖民地的年率之间存在正相关性.

结论:

持续高海冰度地区是阿德丽企的重要变息地.
在这些关键的变区,SIC的下降可能会成为成年企的年度生存瓶.
期的海冰状况是阿德利企种群动态的一个重要,以前被低估的因素.

关键词:

在南极洲,南极洲是南极洲.这种植物叫Pygoscelis adeliae.罗斯海罗斯海罗斯海气候变化气候变化气候变化地理定位的地理位置

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