北大西洋のココリトフォアの数が数十年で増加し,二酸化炭素の上昇がもたらす可能性
Sara Rivero-Calle1, Anand Gnanadesikan2, Carlos E Del Castillo3
1Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, MD, USA. Applied Physics Laboratory, The Johns Hopkins University, Baltimore, MD, USA. sara.rivero@jhu.edu gnanades@jhu.edu.
Science (New York, N.Y.)
|November 28, 2015
まとめ
二酸化炭素 (CO2) による海洋酸性化は,いくつかの植物プランクトンに有益である可能性があります. 北大西洋のココリトフォア群は 大きく増加しており CO2と気温が 成長を加速させる可能性があることを示唆しています
科学分野:
- 海洋生物学
- 海洋学
- 気候変動科学
背景:
- 人為的な二酸化炭素 (CO2) 排出による海洋酸化は,ますます懸念されています.
- 海洋のpH値が低下すると,一般的には化海洋生物が悪影響を受ける見込みです.
- ココロリトフォアは 海洋の炭素循環に重要な役割を果たす 植物プランクトンのグループです
研究 の 目的:
- 北大西洋におけるココリトフォア発生の長期的傾向を調査する.
- ココリトフォア群の変化に影響を与える主要な環境要因を特定する.
- 高濃度のCO2が ココリトホルスの増殖を促すという仮説を検証する.
主な方法:
- 1965年から2010年までの連続プランクトンレコーダーのデータ分析
- 20以上の潜在的な環境要因を評価するためにランダムな森林モデルを適用する.
- ココリトフォール反応に関する41の独立した研究をまとめ,レビューした.
主要な成果:
- 北大西洋のコッコリトフォールの発生率は1965年から2010年の間に約2%から20%以上に増加しました.
- ランダムな森林モデルでは,CO2と大西洋多年期の振動が,この増加の最も重要な予測要因として特定されました.
- 研究室での研究では,高濃度のCO2がココリトホルスの成長を刺激するという仮説を裏付けました.
結論:
- この研究は北大西洋のココリトフォアが 盆地規模で長期にわたって増加していることを示しています
- 二酸化炭素と気温の上昇は この重要な植物プランクトンの 成長を加速しているようです
- これらの発見は 気候変動下で海洋の炭素循環を理解する上で 重要な意味を持ちます
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