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在不断变化的北冰洋海底初级生产

Karl Attard^1,2,3, Rakesh Kumar Singh^4,5, Jean-Pierre Gattuso^6,7

¹Department of Biology, University of Southern Denmark, 5230 Odense M, Denmark.

Proceedings of the National Academy of Sciences of the United States of America

|March 4, 2024

概括

土初级生产者 (BPPs) 是北极海洋生产的重要,量化不足的来源. 这些生物体对北极的碳预算做出了重大贡献,并且随着气候变化而扩大.

科学领域:

海洋生态海洋生态学
北极海洋学北极海洋学
碳循环是碳循环的过程.

背景情况:

植物浮游生物和海冰藻类传统上被视为北极地区的主要生产者.
包括微藻,宏藻和海草在内的本土初级生产者 (BPP) 是海洋初级生产的量化不足但潜在的重要来源.
模型表明,BPP覆盖了大约300万平方公里的北极沿海和架海洋.

研究的目的:

探索BPP在北极海洋生态系统中的重要性.
量化BPP对北极原始生产的贡献.
评估气候变化对BPP及其息地的影响.

主要方法:

综合公布的关于北极地区BPP的数据.
应用一种新型模型来估计 BPP 对初级生产的贡献.
分析暴露在阳光下的北极海底区域变化及其与BPP分布和生产率的相关性.

主要成果:

据估计,BPP对北极的初级产量贡献了77 Tg C y-1 ,占植物浮游生物产量的20-35%.
大藻类的贡献为43 Tg C y−1,海草为23 Tg C y−1,微藻类为11-16 Tg C y−1.
自2003年以来,阳光照亮的海底面积增加了约47,000平方公里,1年,扩大了BPP息地,由于变暖和冰损失,宏菌的生产率预计将增加.

结论:

北极海是北极海洋初级生产的主要贡献者,因此需要将它们纳入生态系统模型和碳预算.
气候变化对BPP产生了复杂的影响;虽然变暖和冰损失有利于大藻类,但水的透明度降低可能会限制微藻类的生产.
进一步的研究对于解决有关北极BPP分布,生产力和生态系统中的作用的知识差距至关重要.

关键词:

北极的生态系统宏观藻类是一种宏观藻类.海洋初级生产海洋初级生产微藻类是一种微藻类.海洋草是一种海草.

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