World Seagrass Day is observed every year on 1 March to raise awareness about the importance of seagrass ecosystems for marine biodiversity, climate regulation and coastal protection. The day was proclaimed by the United Nations General Assembly through Resolution A/RES/76/265 in May 2022, following a proposal by Sri Lanka.
The observance highlights the urgent need to conserve and restore seagrass ecosystems, which play a crucial role in maintaining healthy oceans and achieving global sustainability goals.
Key Facts
| Aspect | Details |
| Observed on | 1 March every year |
| Declared by | UN General Assembly |
| UN Resolution | A/RES/76/265 |
| Year proclaimed | 2022 |
| Aim | Promote conservation of seagrass ecosystems |
The initiative is supported by organizations such as the International Union for Conservation of Nature (IUCN).
What are Seagrasses?
Seagrasses are marine flowering plants that grow in shallow coastal waters across the world, from tropical regions to the Arctic Circle.
Key Characteristics
| Feature | Description |
| Habitat | Shallow coastal waters |
| Ecosystem type | Underwater meadows |
| Plant type | Marine flowering plants |
| Distribution | Present on coastlines worldwide except Antarctica |
These plants form extensive underwater meadows, creating one of the most productive marine ecosystems.
Importance of Seagrass Ecosystems
Despite covering only 0.1% of the ocean floor, seagrass ecosystems provide critical environmental services.
Key Functions
| Role | Importance |
| Biodiversity support | Provide habitat for fish, seahorses, turtles and marine species |
| Fisheries | Nursery grounds for ~20% of global fisheries |
| Carbon storage | Store up to 18% of oceanic carbon |
| Water purification | Filter nutrients and pollutants |
| Coastal protection | Reduce wave energy and prevent coastal erosion |
| Ecosystem resilience | Help buffer ocean acidification |
Seagrass ecosystems act as nature-based solutions to climate change.
Global Distribution
- Found along coastlines in 159 countries
- Around 72 species of seagrass have been identified worldwide
- Cover approximately 300,000 square kilometres of ocean area
They evolved nearly 100 million years ago, adapting to life in marine environments.
Threats to Seagrass Ecosystems
Seagrasses are declining globally due to multiple environmental pressures.
Major Threats
| Threat | Impact |
| Coastal development | Habitat destruction |
| Pollution and land runoff | Water contamination |
| Climate change | Rising temperatures and ocean acidification |
| Dredging activities | Physical damage to seabeds |
| Unregulated fishing and boating | Ecosystem disturbance |
Global Decline
- Seagrass loss occurring at ~7% per year
- Equivalent to a football field of seagrass disappearing every 30 minutes
- 21% of seagrass species are listed as Near Threatened, Vulnerable or Endangered on the IUCN Red List.
Importance for Climate Change Mitigation
Seagrass ecosystems are powerful “blue carbon” sinks.
| Indicator | Value |
| Ocean carbon stored by seagrass | Up to 18% |
| Carbon storage | Higher per area than many terrestrial ecosystems |
| Sediment carbon | 4,200–8,400 Tg organic carbon |
Because of this, seagrasses are vital for climate mitigation and adaptation strategies.
Global Conservation Initiatives
Conserving seagrass ecosystems contributes to multiple global environmental frameworks.
Key Global Frameworks
- Paris Agreement
- United Nations Framework Convention on Climate Change
- Convention on Biological Diversity
- United Nations Decade on Ecosystem Restoration
- Sustainable Development Goals
Protecting seagrass meadows can help countries achieve 26 SDG targets across 10 Sustainable Development Goals.
Restoration and Protection Efforts
Despite global decline, some regions have seen successful seagrass restoration, mainly due to:
- Improved coastal management
- Pollution reduction
- Marine protected areas
- Sustainable fishing practices.
However, currently only about 25% of seagrass meadows lie within marine protected areas.
Significance of World Seagrass Day
The observance aims to:
- Raise awareness about seagrass ecosystems.
- Promote conservation and restoration initiatives.
- Strengthen sustainable blue economy strategies.
- Protect marine biodiversity and fisheries.
- Address climate change through blue carbon ecosystems.