Geography AQA Predictions (A Level)Watch
Coasts last year had a theory-based 20 marker so I would imagine a more case specific question would come up. Possibly about coastal management? Not sure.
Ecosystems, well. Savannah grasslands, plagioclimaxes and coral reefs all came up last year. I would imagine that tropical rainforests could come up here then, or perhaps a regional/local ecological change case study (Wicken Fen/Exmoor for me). Perhaps a 9 marker on temperate deciduous woodland or urban wastelands.
Hope that this helps! (I will look at human past papers some other time)