protected area 50 Conservation 31 Protected areas 21 Environmental protection 20 Biodiversity 14 biodiversity 14 Ecosystems 13 governance approach 11 conservation management 10 marine environment 10 Marine protected area 8 environmental protection 8 China 7 Indicator indicator 7 Marine protected areas 7 conservation status 7 marine ecosystem 7 nature conservation 7 Ecology 6 Land use 6 fishery management 6 marine policy 6 Birds 5 Mammalia 5 detection method 5 protected areas 5 Biodiversity conservation 4 Climate change 4 Environmental management 4 Forestry 4