Coastal Squeeze: Mangrove & Marsh Migration Barrier |…

What Coastal Squeeze Is

Coastal squeeze is a phenomenon where natural coastal ecosystems such as mangrove forests and salt marshes are threatened by the encroachment of human infrastructure, like seawalls or roads. These barriers prevent these ecosystems from migrating landward to adapt to rising sea levels, leading to their gradual loss.

This process can significantly impact biodiversity and ecosystem services provided by these habitats, including coastal protection, carbon storage, and habitat provision for numerous species.

How Mangroves and Marshes Respond

Mangroves and salt marshes are highly adaptive ecosystems that can respond to rising sea levels by accreting sediment and growing vertically. This process, known as vertical accretion, allows these ecosystems to keep pace with the rate of sea-level rise. However, when a hard barrier is placed in their path, they cannot migrate landward, leading to a reduction in their area over time.

The rate at which these ecosystems can adapt is influenced by factors such as sediment availability and the rate of sea-level rise. If the rate of sea-level rise exceeds the ecosystem's ability to accrete sediment, it will lead to coastal squeeze.

live demo · related simulation● LIVE

Why It Matters

Coastal squeeze is a critical issue for global biodiversity and human well-being. Mangroves and salt marshes are among the most productive ecosystems on Earth, providing essential services such as storm protection, water filtration, and carbon storage. Their loss can have far-reaching ecological and economic consequences.

Understanding coastal squeeze helps in developing effective strategies to protect these vital ecosystems, including nature-based solutions like restoring natural barriers or creating buffer zones.

Real-World Examples

Coastal squeeze is a global issue affecting many regions. For example, the Everglades in Florida and the Sundarbans in Bangladesh are both experiencing coastal squeeze due to rising sea levels and human development. These areas require careful management to ensure their survival.

Another example is the mangrove forests along the coast of Vietnam, which have been threatened by seawalls and other infrastructure projects. The loss of these ecosystems can lead to increased erosion, flooding, and reduced biodiversity.

Frequently asked questions

What causes coastal squeeze?

Coastal squeeze is caused by the combination of rising sea levels and human infrastructure such as seawalls or roads that prevent natural ecosystems like mangroves and salt marshes from migrating landward.

How can we mitigate coastal squeeze?

Mitigation strategies include restoring natural barriers, creating buffer zones, and managing land use to allow for the migration of these ecosystems. Nature-based solutions are often more effective in the long term compared to hard engineering measures.

Why is mangrove loss a concern?

Mangroves provide essential services such as coastal protection, carbon storage, and habitat provision. Their loss can lead to increased erosion, flooding, and reduced biodiversity, impacting both ecosystems and human communities.

Can natural barriers adapt to rising sea levels without human intervention?

Yes, mangroves and salt marshes have the ability to adapt to rising sea levels through vertical accretion. However, this process can be hindered by hard infrastructure that prevents them from migrating landward.

Try it live

Everything above runs in your browser — open Coastal Squeeze: Mangrove & Marsh Migration Barrier and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open Coastal Squeeze: Mangrove & Marsh Migration Barrier simulation