Related by context. Frequent words. (Click for all words.) 68 hydrologic cycle 64 biogeochemical 63 hydrological cycle 62 terrestrial ecosystems 60 biogeochemistry 59 nitrogen fixation 58 atmospheric chemistry 58 ecosystems 58 microbiota 57 microbial ecology 57 freshwater ecosystems 57 cryosphere 57 atmospheric circulation 56 biophysical 56 forest ecosystems 56 biosphere 56 ocean acidity 55 ocean salinity 55 phytoplankton blooms 55 gut microbes 55 bioaccumulation 54 isotope ratios 54 epigenome 54 ENSO 54 ecologies 54 aquatic ecosystems 54 El Niño Southern Oscillation 53 plankton blooms 53 pathophysiological 53 aquatic ecosystem 53 Cyanobacteria 53 atmospheric methane 53 spatial scales 53 deglaciation 53 aerosol particles 53 interrelatedness 53 cofactors 53 histone modifications 52 abiotic 52 perturbations 52 Pacific Decadal Oscillation 52 Phytoplankton 52 microbiome 52 anthropogenic 52 radiative forcing 52 methanogens 52 tropospheric 52 circadian clocks 52 atmospheric CO 52 planktonic 52 faunal 51 symbionts 51 cellular metabolism 51 carbohydrate metabolism 51 biota 51 benthic 51 otolith 51 magnetic reconnection 51 fatty acid metabolism 51 Polar Regions 51 stratospheric ozone 51 prokaryotes 51 nitrification 51 geomorphology 51 computational sciences 51 aquatic habitats 51 ecology 51 upwellings 51 dynamics 51 deplete oxygen 51 speciation 51 microflora 51 species extinctions 51 marine ecosystem 51 multicellular organisms 51 marine sediments 51 diatom 50 genetic susceptibility 50 biogeography 50 isotopic composition 50 sorption 50 NCAR scientist 50 marine ecosystems 50 harmful algal blooms 50 evolutionarily conserved 50 biochemical processes 50 greenhouse warming 50 cell signaling pathways 50 coral reef ecosystem 50 glucose homeostasis 49 biotic 49 ocean ecosystems 49 Snowball Earth 49 zooxanthellae 49 dynamical 49 habitat fragmentation 49 ecosystem 49 substorm 49 lipid metabolism 49 lithosphere 49 numerical modeling