Antarctica 2 Aquatic communities 2 Benthos 2 Community structure 2 Ecological zonation 2 Isla 25 de Mayo/King George Island 2 King George Island 2 Palmaria decipiens 2 Potter Peninsula 2 Rhodophyta 2 Seaweeds 2 South Shetland Islands 2 annual variation 2 aquatic organism 2 benthos 2 climate change 2 community structure 2 ecological zonation 2 environmental conditions 2 global climate 2 hypothesis testing 2 intertidal environment 2 macroalga 2 red alga 2 seaweed 2 spatiotemporal analysis 2 species diversity 2 species richness 2