南极洲东部普里兹湾维斯特福尔德丘陵高纬度地区偶然发现的针足类动物

IF 1.8 4区 地球科学 Q3 ENVIRONMENTAL SCIENCES
John van den Hoff
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引用次数: 0

摘要

据预测,随着未来气候相关生态系统的变化,物种分布也会发生变化,因此所谓的 "流浪 "个体可能会在目前被认为超出其主要分布范围的地区定居或重新定居。我们整理了南极洲东部维斯福尔丘陵极高纬度地区出现的针足类(海豹)物种的调查数据。威德尔海豹(Leptonychotes weddellii)和南象海豹(Mirounga leonina)每年都会聚集在维斯福尔德丘陵繁殖和/或换羽,除此以外,随着速冻冰边缘的消退,还观察到另外三种凤头海豹。豹斑海豹(Hydrurga leptonyx)的出现随着季节性丰富猎物资源的增加而增加,而蟹海豹(Lobodon carcinophaga)出现的时间正好是它们的换羽期。亚成年雄性南极海狗(Arctocephalus gazella)的出现扩大了该物种已知的南下范围,可能反映了凯尔盖朗高原地区源种群数量的增加。虽然没有直接看到罗斯海豹(Ommatophoca rossii),但通过水下被动声学监测发现它们出现在维斯特福尔山附近。流冰物种和亚南极海狗的出没情况可能会随着气候引起的海冰条件变化而改变。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Incidental pinnipeds at high latitudes of the Vestfold Hills, Prydz Bay, East Antarctica

Species distributions are predicted to change with future climate-associated ecosystem changes such that so-called ‘vagrant’ individuals may become established or re-establish in areas currently thought to be beyond their principle ranges. Survey data were collated for occurrences of pinniped (seal) species at very high latitudes of the Vestfold Hills, East Antarctica. Aside from Weddell seals (Leptonychotes weddellii) and southern elephant seals (Mirounga leonina), which aggregate annually at the Vestfold Hills to breed and/or moult, three other pinniped species were observed with the recession of the fast-ice edge. Leopard seal (Hydrurga leptonyx) occurrences increased with an increase in a seasonally abundant prey resource, and crabeater seals (Lobodon carcinophaga) were seen at a time that coincides with their moult period. Occurrences of sub-adult male Antarctic fur seals (Arctocephalus gazella) increase the known southward range for this species and may reflect population increases at source populations in the Kerguelen Plateau area. Although there were no direct sightings of Ross seals (Ommatophoca rossii), their presence close to the Vestfold Hills was detected by underwater passive acoustic monitoring. Sightings of obligate drift-ice species and sub-Antarctic fur seals may change at the Vestfold Hills with climate-mediated changes in sea-ice conditions.

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来源期刊
Antarctic Science
Antarctic Science 地学-地球科学综合
CiteScore
3.60
自引率
6.20%
发文量
42
审稿时长
3 months
期刊介绍: Antarctic Science provides a truly international forum for the broad spread of studies that increasingly characterise scientific research in the Antarctic. Whilst emphasising interdisciplinary work, the journal publishes papers from environmental management to biodiversity, from volcanoes to icebergs, and from oceanography to the upper atmosphere. No other journal covers such a wide range of Antarctic scientific studies. The journal attracts papers from all countries currently undertaking Antarctic research. It publishes both review and data papers with no limits on length, two-page short notes on technical developments and recent discoveries, and book reviews. These, together with an editorial discussing broader aspects of science, provide a rich and varied mixture of items to interest researchers in all areas of science. There are no page charges, or charges for colour, to authors publishing in the Journal. One issue each year is normally devoted to a specific theme or papers from a major meeting.
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