algae allometry anatomy animal arable land archaea area attenuation autotroph axial tilt bacteria beta decay biodiversity biological pump biosphere calvin cycle carbohydrate carbon cycle carbon dioxide cellular respiration chemosynthesis chlorophyll crassulacean acid metabolism decomposition desert diameter at breast height diatom digital object identifier dissipation earth earth science ecosystem services effect of sun angle on climate empirical enzyme eukaryote europe evaporation evolution f-ratio food chain glucose goddard space flight center hnlc heterotroph holdfast hydrology iron irrigation kelp forest land use leaf lithotroph marchantiophyta metabolism micronutrient microorganism mineral mixed layer moss nasa nile nitrate nitrate reductase nitrogen fixation non-vascular plant nutrient oak oceanic basin organic compound organic synthesis organism pasture phosphate photic zone photosynthesis physiology phytoplankton plankton plant polar region prokaryote protein radioactive decay redox salinity sargassum satellite scattering scintillation counter seawifs sea ice seagrass season seaweed secondary production silicic acid soil southern ocean species stoma storm sugar sunlight temperature thermal insulation thermocline tonne transpiration tropics turbulence upwelling vascular plant water weather wetland wind winkler test for dissolved oxygen world ocean world ocean atlas