Related by context. Frequent words. (Click for all words.) 68 algal blooms 67 phytoplankton 66 diatoms 65 microscopic algae 64 algae blooms 63 harmful algal blooms 62 upwelling 62 Phytoplankton 62 plankton 61 nitrogen fixation 60 algae 60 cyanobacteria 60 aerosol particles 60 atmospheric circulation 59 algal bloom 59 zooplankton 59 copepods 58 El Ninos 57 alga 57 insect populations 57 toxic algae 56 algal 56 mid latitudes 56 anoxic 56 nitrogen fixing 55 photosynthetic 55 oxygen depletion 55 vortices 55 kelp forests 55 aquatic ecosystems 55 krill 55 marine organisms 55 nutrient runoff 54 volcanism 54 salinity 54 glacial melt 54 algae bloom 54 geomagnetic storms 54 acidification 54 photosynthesis 54 benthic 54 aquatic insects 54 equatorial Pacific 54 grasses 54 diatom 54 ocean currents 53 species extinctions 53 dissolved oxygen levels 53 trophic 53 gobies 53 substorms 53 hypoxia 53 corals 53 X ray emission 53 convective 52 chlorophyll 52 microscopic organisms 52 marine ecosystems 52 vertical wind shear 52 warmer temperatures 52 atmospheric carbon dioxide 52 sediments 52 waterspouts 52 dissolved oxygen 52 meltwater 52 biota 52 organisms 52 greenhouse warming 52 coral bleaching 52 mass extinctions 52 kelp 52 nutrient rich 52 coronal mass ejections 51 albedo 51 auroras 51 eutrophication 51 atmospheric CO2 51 eelgrass 51 oxygen starved 51 filter feeders 51 oscillations 51 fungal spores 51 seagrass beds 51 oxidants 51 mammals 51 hydrothermal vents 51 stratospheric ozone 51 landmasses 51 water vapor 51 stomata 51 Ocean acidification 51 nitrogen 51 perturbation 51 Didymo 51 sulphates 51 sunspot activity 50 Sunspots 50 Warmer temperatures 50 nutrients 50 aquatic organisms 50 temperate regions