bay shore density early early morning erosion prevention grass grasses groundcover light Morning plants resilient salt-resistant salt-resistant seaside vegetation sand sandy seaside shadows shore sunlight variation variety vegetation wind-resistant Aizoaceae angular-pigface Cape-fig carpobrotus-glaucescens coastal creeping-succulent daisy-like-flowers drought-resistant dune-stabilizer edible fire-resistant fleshy flora flower flowers food Hottentot-plant ice-plant invasive medicinal nutritional open perennials pigface pink-purple plant plant-mat prostrate salt-substitute salt-tolerant sand-dunes sand-stabilizer smooth-leaves sour-fig strand-ivy succulent sunshine thick triangular-leaves yellow bee bees insect insects angles beach beachbuggy buggy distance distant driver driving dunes fisherman fishing-rod machine movement ocean surf tracks trail transport turbulence vegetations vehicle waves coast coastline colors colours conservation conserve conserving cultivating cultivation dune-flora environment environmental green greenery growing growth natural nature ocean edge planting protect protection reclaim reclamation replanting rough scrub