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Blue carbon How do coastal wetlands store carbon?

Follow plant growth, soil burial, greenhouse gases, disturbance, restoration, and measurement through coastal-wetland carbon storage.

5
lessons
~20 min
to learn
🔬 Science
subject
Adults
level
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What you’ll learn

  1. Carbon enters as growthExplain how photosynthesis, roots, mangroves, and seagrass supply carbon to coastal systems.Plant growth is the input, but only part of that carbon becomes long-lived storage.
  2. Soil holds the archiveDescribe burial, export, disturbance, and sediment cores as processes and evidence for soil carbon storage.Wetland soils preserve a changing carbon archive whose boundaries and ages must be measured.
  3. Gases complicate the balanceDistinguish carbon dioxide uptake from methane, nitrous oxide, and whole-budget climate accounting.A net climate effect depends on gases and flows as well as the stock in soil.
  4. Disturbance can reverse storagePredict how drainage, erosion, meadow loss, sea-level rise, and land conversion alter carbon storage.When hydrology, elevation, or vegetation changes, a store can become a source.
  5. Restoration protects a processEvaluate tidal reconnection, sediment, planting, living shorelines, and monitoring as process-based carbon actions.Credible restoration protects the physical and biological processes that build and retain carbon.

Questions this course answers

What does blue carbon describe in this course?

Blue carbon refers to carbon captured and stored in coastal and marine ecosystems.

Put the basic path from sunlight to soil carbon in order.

Growth supplies organic material that can reach and remain in soil.

Why do researchers collect sediment cores?

Cores reveal carbon concentration, density, layers, and sometimes age.

Tidal water can carry dissolved and particulate carbon out through a ___.

Tidal creeks connect wetlands with estuaries and transport material.

What makes burial important for storage?

Depth and waterlogged conditions can extend carbon residence time without guaranteeing permanence.

Why should methane be included in a wetland carbon budget?

Methane emissions vary among wetland conditions and can affect net climate balance.

Grounded in trusted sources

  • https://coast.noaa.gov/states/fast-facts/blue-carbon.html
  • https://www.epa.gov/wetlands/about-coastal-wetlands
  • https://www.usgs.gov/centers/western-geographic-science-center/science/coastal-wetland-blue-carbon
  • https://www.usgs.gov/data/collection-analysis-and-age-dating-sediment-cores-mangrove-and-salt-marsh-ecosystems-tampa-bay
  • https://www.fisheries.noaa.gov/inport/item/78505
  • https://www.ipcc.ch/site/assets/uploads/2018/04/Wetlands_Supplement_Entire_Report.pdf

Every Wunder lesson is built from real, reputable sources — never invented.

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