HomeNature & BiologyTop 10 Marine Algal Ecosystems Contributing Most to Global Carbon Sink
Top 10Updated 2026年3月14日

Top 10 Marine Algal Ecosystems Contributing Most to Global Carbon Sink

Based on 2026 oceanographic monitoring, this list evaluates major marine algal ecosystems by their photosynthetic carbon sequestration and burial rates. The ranking considers geographical coverage, sequestration flux, and long-term storage capacity, highlighting the essential role these ecosystems play in mitigating global climate change.

Current #1
Southern Ocean

Interesting Facts & Summary

Why Algae Outperform Forests?

While terrestrial forests are widely recognized, marine algae (especially macroalgae and phytoplankton) possess 'Blue Carbon' sequestration rates that often exceed those of land-based ecosystems.

  • Key Fact: Phytoplankton in the Southern Ocean, despite their microscopic size, contribute significantly to carbon storage due to their vast coverage and efficient biological pump.
  • Dynamic Shifts: Rising ocean temperatures are challenging these 'carbon pump' mechanisms, making the preservation of these ecosystems more urgent than ever.
RankEcosystem NameAnnual Carbon Sequestration (Mt C)Dominant Algal Type
Southern Ocean
150.5Diatoms
North Atlantic Drift
112.3Coccolithophores
Sargasso Sea
85Sargassum
4
Pacific Equatorial Upwelling
78.4Picophytoplankton
5
Great Barrier Reef System
62.1Macroalgae & Crustose Coralline Algae
6
Arctic Marginal Seas
55.8Ice Algae
7
South American Pacific Kelp Forests
48.2Giant Kelp
8
Arabian Sea Upwelling
42.6Dinoflagellates
9
Western Australian Kelp Beds
39.5Brown Algae
10
Kuroshio Current Region
35Diatoms & Coccolithophores

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