Griffith University, Centre for Planetary Health and Food Security, Southern Ocean Persistent Organic Pollutants Program, Kessels Road, Nathan, QLD 4111, Australia.
Griffith University, Centre for Planetary Health and Food Security, Southern Ocean Persistent Organic Pollutants Program, Kessels Road, Nathan, QLD 4111, Australia.
Sci Total Environ. 2023 Aug 20;887:164053. doi: 10.1016/j.scitotenv.2023.164053. Epub 2023 May 12.
The past six years have been marked by some of the most dramatic climatic events observed in the Antarctic region in recent history, commencing with the 2017 sea-ice extreme low. The Humpback Whale Sentinel Programme is a circum-polar biomonitoring program for long term surveillance of the Antarctic sea-ice ecosystem. It has previously signalled the extreme La Niña event of 2010/11, and it was therefore of interest to assess the capacity of existing biomonitoring measures under the program to detect the impacts of 2017 anomalous climatic events. Six ecophysiological markers of population adiposity, diet, and fecundity were targeted, as well as calf and juvenile mortality via stranding records. All indicators, with the exception of bulk stable isotope dietary tracers, indicated a negative trend in 2017, whilst C and N bulk stable isotopes appeared to indicate a lag phase resulting from the anomalous year. The collation of multiple biochemical, chemical, and observational lines of evidence via a single biomonitoring platform provides comprehensive information for evidence-led policy in the Antarctic and Southern Ocean region.
过去六年中，南极地区出现了一些近年来最为显著的气候事件，其中包括 2017 年的海冰极端低值。座头鲸监测计划是一个环绕极地的生物监测项目，用于对南极海冰生态系统进行长期监测。该计划此前曾发出 2010/11 年极端拉尼娜事件的信号，因此有必要评估该计划下现有生物监测措施检测 2017 年异常气候事件影响的能力。该计划针对种群肥胖、饮食和繁殖力的六个生态生理指标，以及通过搁浅记录的幼鲸和幼仔死亡率进行了研究。除了体脂稳定同位素饮食示踪剂外，所有指标在 2017 年均呈下降趋势，而 C 和 N 体脂稳定同位素似乎表明由于异常年份出现了滞后阶段。通过单一的生物监测平台整合多种生化、化学和观测证据线，为南极和南大洋地区的循证政策提供了全面信息。
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