habitat management Argentina 16 abundance 12 Aves 8 species richness 8 Patagonia 6 South America 6 Spartina 6 habitat structure 6 species diversity 6 Atlantic Ocean 4 Atlantic Ocean (Southwest) 4 Buenos Aires [Argentina] 4 Crustacea 4 Ecosystem engineers 4 Habitat complexity 4 Macroinvertebrate assemblage 4 Orchestia gammarella 4 Pampas 4 Poaceae 4 Polychaeta 4 Spartonoica maluroides 4 Thoracica 4 agroecosystem 4 avifauna 4 bird 4 coastal zone 4 community response 4 dominance 4 ecosystem engineering 4