南极的垂直迁移会影响季节性碳出口
A J R Smith1,2, S Wotherspoon2, L Ratnarajah1
1Australian Antarctic Program Partnership, Institute for Marine and Antarctic Studies, University of Tasmania, nipaluna/Hobart, Tasmania, Australia.
Science (New York, N.Y.)
|January 23, 2025
概括
南极 (Euphausia superba) 的垂直迁移对海洋碳循环产生重大影响. 模型必须考虑季节性迁移模式以准确估计碳出口,防止气候变化评估过度估计.
科学领域:
- 海洋生物学
- 生物地质化学
- 海洋学
背景情况:
- 海洋生物的垂直迁移是生物碳出口的关键途径.
- 由于数据有限,生物地化学模型往往过度简化了迁徙物种的碳循环.
- 南极 (Euphausia superba) 在南洋碳动态中发挥着重要作用.
研究的目的:
- 测量来自南极便颗粒的有机颗粒 (POC) 流量.
- 评估垂直迁移对深海碳出口的贡献.
- 在生物地化学模型中改善鱼在碳循环中的作用.
主要方法:
- 使用数字模型与东南极洲一年的声学观测相结合.
- 根据的便颗粒产量估计的POC总流量.
- 分析了鱼迁徙的深度和季节性.
主要成果:
- 从的便颗粒中总的POC流量估计为9. 68 mg C m-2天-1.
- 最多有25%的鱼在200米以下迁移,表现出强烈的季节性.
- 季节性深海迁徙将总流量中的不到10% (1.28 mg C m-2/day-1) 运送到深海.
结论:
- 鱼的垂直迁移具有显著的季节性,影响了碳出口的规模和时间.
- 精确的碳流估计需要纳入的季节性迁移动态.
- 在模型中不考虑季节性可能导致碳出口的高估,影响气候政策.
更多相关视频
10:28Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
Published on: June 13, 2020
5.8K
08:15Author Spotlight: Unveiling Plankton Response to Climate Change Through Time-Series Data and Artistic Expression
Published on: July 28, 2023
1.1K
相关概念视频
01:06Primary Production
23.5K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.5K
00:53Migration
7.9K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
7.9K
00:48Optimal Foraging
11.9K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
11.9K
01:50Global Climate Change
24.2K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.2K
01:14The Carbon Cycle
36.9K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
36.9K