Related by context. Frequent words. (Click for all words.) 60 ecology 58 aquatic habitats 58 habitat fragmentation 58 terrestrial ecosystems 57 aquatic insects 56 aquatic ecosystem 55 ecosystems 55 freshwater ecosystems 55 aquatic ecosystems 55 migratory patterns 54 marine ecosystems 52 ocean ecosystems 52 biota 52 species 52 forest ecosystems 52 coastal ecosystems 52 aquatic species 51 amphibian populations 51 keystone species 51 habitats 51 temperature salinity 50 harmful algal blooms 50 zooplankton 50 grassland birds 50 biogeography 50 ecologies 50 insect populations 50 habitat 49 mating habits 49 aquatic habitat 49 amphibians 49 hydrological cycle 49 physiology 49 habitat degradation 49 marine invertebrates 49 nitrogen fixation 49 neurochemistry 49 ecological 49 trophic 48 reproductive biology 48 nesting habitat 48 estuarine 48 aquatic 48 pollinators 48 lipid metabolism 48 benthic 48 mammals 48 microbiota 48 biodiversity 48 freshwater 48 caribou herds 47 marine ecology 47 Invasive species 47 snowshoe hares 47 biology 47 lampreys 47 speciation 47 Daphnia 47 predation 47 flora fauna 47 Phytoplankton 47 sociality 47 avian species 47 metabolic processes 47 marine reptiles 47 geomorphology 47 invertebrates 47 biogeochemistry 47 neural mechanisms 47 invasive species 47 intertidal 47 marine ecosystem 47 hydrology 47 species extinctions 46 wildlife 46 forage 46 monk seals 46 aquatic organisms 46 Polar Regions 46 biochemical processes 46 sea lamprey 46 plankton 46 damselflies 46 bee populations 46 Honey bees 46 freshwater mussels 46 Biologist 46 Coho salmon 45 vertebrate 45 biologists 45 dissolved oxygen 45 microflora 45 marine organisms 45 atmospheric chemistry 45 larval stage 45 seagrasses 45 wetland habitats 45 megafauna 45 vertebrate species 45 endocrine disrupters 45 ecologist