deciduous England english forest Great Britain landscape plant regeneration renewal replanting saplings supports Surrey Terrestrial plant tree tubes woodland coast coastline colors colours conservation conserve conserving cultivating cultivation dune-flora dunes environment environmental flora grass grasses green greenery growing growth natural nature ocean ocean edge planting plants protect protection reclaim reclamation rough salt-resistant sand sand-dunes scrub vegetation background beach coastal communication contrast contrasting direction directive foliage light sign signs tides