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Posts Tagged ‘coastal sand dune preservation’

Weekly Photo Challenge: Delicate

Posted by Jody on December 14, 2012

Delicate Coastal Sand Dunes

Delicate Coastal Sand Dunes

What threatens coastal sand dunes?

Coastal sand dune systems are highly vulnerable to disturbance by trampling. Pedestrians and motor vehicles can compact the sand and crush vegetation; for example, Native Dune Grass dies when its roots are crushed. Without the stabilizing vegetation, the sand is blown away and dunes disappear. This can leave the shoreline more prone to damage from storm surges.

Invasive species are a major concern for the ecology of sand dunes. Scotch Broom and European Beachgrass are two common examples. Because they are not native to the region, they often have no natural predators or other controls. Therefore, invasive species can create dense monocultures that crowd out other species. As they did not evolve along with all the other species in the area, they provide limited habitat values. Some invasive species are so well-established that their eradication is not feasible without substantial cost and effort.

Sand dunes can be destroyed when structures are built too close to the shoreline. As the coastline naturally erodes, these structures become threatened, and people often respond by building “protective” reinforcements such as seawalls. This can further degrade the beach habitat, and even distant seawalls can starve downdrift beaches of sediment (see also coastal sediment processes and altered shorelines).

Dune habitats are often affected by alteration of shorelines in other areas. For example, bluffs composed of glacial till provide sediment that is eroded by waves and transported by longshore currents to the sand dune beach, where it is deposited. If the bluffs are armoured to prevent erosion, with cement or rock, this sediment supply is cut off and the beach is gradually depleted of sand.

How can I help protect coastal sand dunes?

When walking on beaches with sand dunes, try to stay on the seaward side of the dunes, where the sand has been compacted by the tides. Stay on marked or established trails or boardwalks, when walking through dune vegetation, and observe signs.

Keep dogs under control and don’t let them dig in dunes or chase wildlife.

Plant native vegetation along your shoreline property, to help prevent erosion and increase wildlife habitat. Learn about other options for reducing erosion that use natural shoreline development techniques instead of hard structures.

Leave driftwood in place, rather than “cleaning up” the beach. Logs help to stabilize sand dunes, and provide hiding places for wildlife.

Get involved with a local community stewardship group that works to protect and restore sand dunes.

See other tips to help protect shorelines in general.

(Source: Capital Regional District)

We can all make a difference when it comes to the protection and preservation of our delicate coastal sand dune ecosystems. One for all and all for fun!

Have a great day at the beach!

This week’s WordPress Weekly Photo Challenge theme is “Delicate.”

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Posted in Beach and Coastal Wildlife, Sand and Shoreline | Tagged: , , , , | 9 Comments »

Dune Not Disturb: Protecting Our Coastal Sand Dunes the Easy Way

Posted by Jody on September 5, 2012

Help protect our fragile coastal sand dunes.

Coastal sand dune protection is serious business, and it’s no wonder why. Beaches and coastal dunes are essential components of the ever changing environment in which sand is continually exchanged and rearranged. Coastal sand dunes are areas of considerable biological diversity, and, according to the Texas General Land Office, “As a resilient natural barrier to the destructive forces of wind and waves, sand dunes are the least expensive and most efficient defense against storm-surge flooding and beach erosion. Dunes absorb the impact of storm surge and high waves, preventing or delaying intrusion of waters into inland areas. Dunes hold sand that replaces eroded beaches after storms and buffer windblown sand and salt spray.”

Coastal Sand Dunes

What is the best way for beach-goers to help protect and preserve our fragile coastal dune systems?  We simply use the dune walkover structures and/or enter the beach from designated entry points. No kidding. It’s that easy!

Coastal Sand Dune Walkover

Are you interested in the coastal sand dune environment? The State of Texas has a wonderful resource, jam-packed with information on the preservation and restoration of coastal sand dunes. You can download the free educational handbook here: The Dune Protection and Improvement Manual.

Have a dune-friendly day at the beach!

Posted in Beach and Coastal Wildlife, Sand and Shoreline | Tagged: , , | Leave a Comment »

 
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