Communicating Dune Ecosystem's Values
The 3Ss
ACT worked with coastal geomorphologist Dr. Kevin Lynch from the University of Galway to develop a series of infographics aimed at enhancing awareness and understanding of dune ecosystems. Utilising Dr. Lynch's existing 3Ss framework of Sand, Species and Space ACT translated these complex scientific concepts into a series of accessible infographics.
A lot of energy is needed to move sand along the coast. Large waves erode soft cliffs, the seabed, beaches, and dunes, releasing sand into the sea. Afterwards, smaller waves (<1m) and sea currents carry the sand back to the beach, widening the upper beach. When the tides are low, the upper beach dries, allowing sand to blow inland. The wind slows down when it encounters seaweed and plants on the upper beach, depositing sand to form small dunes. These dunes can eventually join to create a foredune ridge or be eroded again, continuing the sand cycle in the coastal landscape.
What do healthy dunes look like?
Healthy dunes are dynamic landscapes marked by diverse vegetation and well-formed sand structures. They typically feature a mix of grasses and other native plants that help stabilize the sand. These dunes are resilient, with visible signs of natural processes such as sand deposition and erosion which contribute to their continuous regeneration. A healthy dune system also supports a variety of wildlife including rare species indicating a robust and thriving ecosystem.
Small hummocks of sand that build up on the upper beach.
The front line of the tall dunes and can range from being the height of a person to sometimes being as tall as a city building.
These are found behind the foredunes and can form tall ridges and many other shapes.
The lower wetter parts between the dunes.
Dune Plants Superpowers
Many of our dunes are Special Areas of Conservation (SACs) and they are highly valued for the plant & animal species that live there. Dune plants have adapted to have different “superpowers”. The dune species' unique ability to survive in the harsh coastal landscape makes them a highly valued natural habitat.
What are positive dune species?
The most famous power plant is the Marram grass, known for its superpower of stabilising sand. However, other super dune species also thrive on the dunes. Their presence indicates a healthy sand dune system. These ecosystems are home to some of Ireland's rarest species including the natterjack toad, Ireland's only native toad, and the common lizard, Ireland's only reptile.
Space for Nature and Humans
Beaches and dunes are flexible landscapes. As storms move sand from one to the other and onto the seabed, they lose energy, protecting the land behind. A healthy sand dune needs time and space to adjust to seasonal and longer-term changes in weather patterns. Planning ahead is critical to ensure that these natural barriers can continue to provide their essential protective functions, balancing the needs of human activity and nature conservation.
Sand dune ecosystems are perceived differently by various user groups, each bringing a unique perspective to their value and importance.
Team
- Simone Broglia
- James McConville
- Kevin Loftus