Global S&T Development Trend Analysis Platform of Resources and Environment
Krill’s influence on CO2 and global climate | |
admin | |
2019-10-18 | |
发布年 | 2019 |
语种 | 英语 |
国家 | 英国 |
领域 | 资源环境 |
正文(英文) | A new study involving British Antarctic Survey researchers highlights the influence of krill (Euphausia superba) on atmospheric carbon levels. It is published in the journal Nature Communications today (18th October 2019). Antarctic krill are well-known for their role at the base of the Southern Ocean food web, where they’re food for marine predators such as seals, penguins and whales. Less well-known is their importance to the ocean’s carbon sink, where CO2 is removed from the atmosphere during photosynthesis by phytoplankton and sequestered to the deep ocean as organic material sinks to the seafloor. Lead author Dr Emma Cavan, at Imperial College London, worked with an international team to review current scientific knowledge of the role of krill in processes that each year remove up to 12 billion tonnes of carbon from Earth’s atmosphere.
Krill faecal pellets constitute the majority of sinking carbon particles that scientists have identified in both shallow and deep waters in the Southern Ocean. Antarctic krill can grow up to six centimetres long and weigh around one gram, but they swarm in such vast numbers that their combined contribution to the movement of ocean carbon and other nutrients can be huge. The Southern Ocean is one of the largest carbon sinks globally, so krill have an important influence on atmospheric carbon levels and therefore the global climate. Krill ecologist Professor Geraint Tarling at British Antarctic Survey says:
Management of the krill fishery in the region currently centres on sustainability and krill’s role in supporting predators such as whales, with little attention given to assessing the significance of krill to the carbon cycle and ocean chemistry. Today the fishery takes less than 0.5 per cent of the available krill and only adults are targeted. But there is no consensus on the effect that harvesting Antarctic krill could have on atmospheric carbon and ocean chemistry nor how growing whale populations might also affect krill numbers. Dr Cavan continues:
Funded by The Pew Charitable Trusts, the research also includes scientists from the Australian Antarctic Division and research institutes and universities from the UK, Germany, and the US. The importance of Antarctic krill in biogeochemical cycles Cavan, E. L.1*^, Belcher, A.2, Atkinson, A.3, Hill, S.L 2, Kawaguchi, S. 4, McCormack, S. 1,5, 3 Meyer, B.6,7,8, Nicol, S.1, Ratnarajah, L.9, Schmidt, K.10, Steinberg, D. K.11, Tarling, G.A.2 & 4 Boyd, P. W.1,5 is published in the journal Nature Communications here.
|
URL | 查看原文 |
来源平台 | British Antarctic Survey |
文献类型 | 新闻 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/233693 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | admin. Krill’s influence on CO2 and global climate. 2019. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[admin]的文章 |
百度学术 |
百度学术中相似的文章 |
[admin]的文章 |
必应学术 |
必应学术中相似的文章 |
[admin]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论