Terrestrial Swamp and marsh Tropical forest Temperate forest Boreal forest Savanna Cultivated land Shrubland Temperate grassland Tundra and alpine Desert scrub Aquatic Algal beds and reefs Estuaries Lakes and streams Continental shelf 」 Open ocean 0 500 1.000 1.5002,0002.500 Net primary production (g per m2 per yr)8 不同生态系统的初级生产力