Ecosystems 113 Research & information: general 78 Sustainable development 60 China 58 Ecological science, the Biosphere 55 Sustainability 55 Biology, life sciences 53 Biodiversity 47 Climate change 46 ecosystem service 46 Ecosystem services 41 Environmental economics 37 sustainability 37 Forestry 36 Environmental management 33 Technology: general issues 33 sustainable development 33 Land use 28 Research and information: general 27 climate change 27 Indicator indicator 26 biodiversity 23 Applied ecology 19 Conservation of the environment 19 Economic and social effects 19 spatiotemporal analysis 18 Ecology 17 History of engineering and technology 17 Geography 16 Soils 16