Ramon Vallejo

Gavà-Dunes Restoration Project Carme Bladé, Josep Lascurain & Ramon Vallejo Management of Metropolitan Dune Ecosystems, 15 November 2010

Pine plantations early 20 th century: dune stabilisation Reduction of sediment discharge in the Llobregat delta Periurban development – secondary housing - tourism Modification of marine currents – coast infraestructures Sea pollution: marine spray impacts Gavamar

Second project 1998-2000 CENTRAL MAR First project 1991-1992 LES MARINES Gavamar

A short fore dune system

But a good diversity in grey dunes

First Project: The construction of the promenade 1990-1992 A small transformation

1991 Ammophila arenaria transplantation

Vegetated dune area also increased

ALBATROS camp site 1984 GAVÀ CENTRAL MAR

The project N. Abad, 2000

Fuente: www.gavamar.com
Gavà Mar beach 1989
The second project 1998-2000: Continuation ot the promenade on the old campsite
Specific problems
Flat topography
Alloctonous soil (fine textured, stony)
Lack of characteristic dune species
Dominance of ruderals & ornamentals

Impact of polluted marine aerosol

The technical project
Elimination of alloctonous soil
Creation of dune topography using underlying sand
(Construction of the promenade pathways)
Sand traps on the front dune
Plantation and seeding of dune species
(short-term monitoring)
Moving sands Fixed dunes Interdunar depression Tamarix woodlands Sclerophyllous shrublands & juniper and pine woodlands

Ammophila arenaria

Gavà Mar in 2000: Restoration project finished

1986 1961 1986 2006

Good stablishment of most of dune species ….

With the exception of most shrubs and trees April 2004

Pistacia lentiscus

March 2009

Juniperus macrocarpa

Rosmarinus officinalis

Tamarix africana

Few Ammophila arenaria remaining May 2010

March 2009

Beach cleaning

Fore dune fixation by the pavement Feb. 2010

Exotic species M. C.de Araujo, 2010 windward

Ruderals still there, May 2010

RUDERALIZATION but Positive visitors’ perception of the dune ecosystems in the promenade

Certainties and uncertainties
To some extent: learning by doing
 Adaptive restoration required
Public awareness and involvement are critical components of restoration
Especially in perurban, highly used areas
What doing next?
addressing identified limitations to the sand dune ecosystem dynamics: small, focused experiments

Ramon Vallejo

by Josep Lascurain - S·G·M s.l.

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