Related by context. Frequent words. (Click for all words.) 56 overfishing pollution 54 chytridiomycosis 53 habitat degradation 52 parasitic mites 52 overhunting 52 habitat fragmentation 52 desiccation 51 Soil erosion 51 Colony Collapse Disorder CCD 51 refugia 51 prolonged droughts 51 severe droughts 50 beetle infestations 50 salinization 50 soil salinity 50 insect infestations 50 nitrogen deposition 49 worsening droughts 49 elk bison 49 chytrid 49 drier summers 49 warmer winters 49 periodic droughts 49 harmful algal blooms 48 prolonged drought 48 milder winters 48 dieback 48 winterkill 48 mold fungi 48 anoxia 48 Melting glaciers 48 temperate regions 48 vibrio 48 wetter winters 48 chestnut blight 48 pneumonia bronchitis 48 Extinctions 48 salination 48 P. ramorum 47 cucurbits 47 epizootic 47 tent caterpillars 47 Subtropical 47 terrestrial ecosystems 47 phytoplankton blooms 47 bioaccumulation 47 hotter summers 47 amphibian populations 47 avian botulism 47 toxic algae blooms 47 Adverse weather 46 Prenatal exposure 46 yellow legged frogs 46 Biological Conservation 46 species extinctions 46 ozone layer depletion 46 El Niño Southern Oscillation 46 migratory bird populations 46 pasture grasses 46 Warming temperatures 46 cooler wetter 46 overharvesting 46 nutritional deficiency 46 Varroa mite 46 droughts 46 Ice Ages 46 colder winters 46 elkhorn 46 megafauna 45 floods cyclones 45 overexploitation 45 temperate zones 45 Spider mites 45 honey bee colonies 45 coniferous forests 45 cogon grass 45 amphipods 45 endocrine disruption 45 oxygen depletion 45 Biogeography 45 nutrient loading 45 upwellings 45 receding glaciers 45 Phytophthora ramorum 45 thawing permafrost 45 Algae blooms 45 frequent droughts 45 overwintered 45 Unusually warm 45 groundwater depletion 44 migrating northward 44 coral bleaching 44 bacterial fungal 44 harmful algae blooms 44 Droughts 44 Severe drought 44 Infestations 44 Aerial surveys 44 Methylmercury 44 Inbreeding 44 freshwater habitats