Collaborative Research: Exploring the Vulnerability of Southern Ocean Pinnipeds to Climate Change - An Integrated Approach

合作研究：探索南大洋鳍足类动物对气候变化的脆弱性——综合方法

• 批准号: 1142108
• 负责人: Paul Koch
• 金额: $ 39.43万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1142108&HistoricalAwards=false
• 关键词: Collaborative; Research; Exploring; Vulnerability; Southern

Building on previously funded NSF research, the use of paleobiological and paleogenetic data from mummified elephant seal carcasses found along the Dry Valleys and Victoria Land Coast in areas that today are too cold to support seal colonies (Mirougina leonina; southern elephant seals; SES) supports the former existence of these seals in this region. The occurrence and then subsequent disappearance of these SES colonies is consistent with major shifts in the Holocene climate to much colder conditions at the last ~1000 years BCE). Further analysis of the preserved remains of three other abundant pinnipeds ? crabeater (Lobodon carciophagus), Weddell (Leptonychotes weddelli) and leopard (Hydrurga leptonyx) will be studied to track changes in their population size (revealed by DNA analysis) and their diet (studied via stable isotope analysis). Combined with known differences in life history, preferred ice habitat and ecosystem sensitivity among these species, this paleoclimate proxy data will be used to assess their exposure and sensitivity to climate change in the Ross Sea region during the past ~1-2,000 years

在之前资助的国家科学基金会研究的基础上，使用来自干谷和维多利亚陆地海岸沿线发现的木乃伊象海豹尸体的古生物学和古遗传学数据，这些地区今天太冷而无法支持海豹群落（Mirougina leonina；南象海豹；SES）这些海豹以前在这个地区的存在。这些 SES 群体的出现和随后的消失与公元前约 1000 年全新世气候向更寒冷条件的重大转变是一致的。 对其他三种丰富的鳍足类动物的保存遗骸进行进一步分析？将对食蟹 (Lobodon carciophagus)、威德尔 (Leptonychotes weddelli) 和豹 (Hydrurga leptonyx) 进行研究，以追踪其种群规模（通过 DNA 分析揭示）和饮食（通过稳定同位素分析研究）的变化。结合这些物种在生活史、首选冰栖息地和生态系统敏感性方面的已知差异，这些古气候代理数据将用于评估它们在过去约 1-2,000 年期间对罗斯海地区气候变化的暴露程度和敏感性

项目成果

Trophic position and foraging ecology of Ross, Weddell, and crabeater seals revealed by compound-specific isotope analysis

• DOI: 10.3354/meps12856
• 发表时间: 2019-02-14
• 期刊: MARINE ECOLOGY PROGRESS SERIES
• 影响因子: 2.5
• 作者: Brault, Emily K.;Koch, Paul L.;Harding, Karin C.
• 通讯作者: Harding, Karin C.