南極クリルの垂直移動が 季節的な炭素輸出を調整する
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.
まとめ
南極のクリル (Euphausia superba) の垂直移動は海洋の炭素循環に大きく影響します 気候変化の評価における過大評価を防ぐために 炭素輸出を正確に推定するために モデルには季節的な移動パターンが考慮されなければならない.
科学分野:
- 海洋生物学
- 生地化学
- 海洋学
背景:
- 海洋生物の縦移動は 生物学的炭素の輸出の重要な経路です
- 生物地球化学モデルは,限られたデータのために,移住する種による炭素循環を過度に単純化しています.
- 南極のクリル (Euphausia superba) は南洋の炭素動態において重要な役割を果たしています.
研究 の 目的:
- 南極のクリルの糞便の微粒子の有機炭素 (POC) 流量を定量化するために.
- 深海の炭素輸出に対するクリルの垂直移動の寄与を評価する.
- 生物地球化学モデルにおける炭素循環におけるクリルの役割の表現を改善する.
主な方法:
- 東南極からの1年間の音響観測と統合された数値モデルを使用しました.
- クリル・フェカル・ペレットの生産を基に推定されたPOC総流量
- クリルの移動パターンの深さと季節性を分析した.
主要な成果:
- クリルの糞便の総POC流量は9. 68mgCm−2日−1日と推定された.
- クリルの最大25%が200m以下に移動し,強い季節性を示した.
- 季節的な深海移動は,総POC流量の10%未満 (1.28 mg C m−1日) を深海に運びました.
結論:
- クリルの垂直移動は季節性があり,炭素の輸出の規模とタイミングに影響を与えます.
- 正確な炭素フロースの見積もりは,クリルの季節的動態を組み込む必要があります.
- モデルで季節性を考慮しないことは,炭素輸出の過大評価につながり,気候政策に影響を及ぼします.
さらに関連する動画
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
関連する概念動画
Primary 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
Migration
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
Optimal 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
Global 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
The 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
