Related by context. Frequent words. (Click for all words.) 63 chytrid 59 chytridiomycosis 58 amphibian populations 57 chytrid fungus 56 Extinctions 56 subtropical regions 54 temperate regions 54 fungal pathogen 54 Infestations 54 endemics 53 temperate forests 53 Citrus canker 53 tropics 53 temperate zones 52 severe droughts 52 honey bee colonies 52 dengue outbreaks 51 Colony Collapse Disorder CCD 51 chestnut blight 51 Varroa mite 51 El Nino Southern Oscillation 51 Campylobacter jejuni 51 El Niños 50 insect populations 50 amphibian species 50 elkhorn 50 migrating northward 50 species extinctions 50 Schistosomiasis 50 Vibrio cholerae 50 parasitic mites 50 refugia 50 wetter winters 50 Bacterial infections 50 deciduous forests 50 subtropics 50 P. ramorum 49 phytoplankton blooms 49 mud snail 49 Droughts 49 upwellings 49 plankton blooms 49 nitrogen deposition 49 Inbreeding 49 malarial parasite 49 migratory bird populations 49 soil salinity 49 endemism 49 Spider mites 49 tiger mosquito 49 Saharan dust 49 Melting glaciers 49 Anopheles 48 El Nino warming 48 chikungunya virus 48 equatorial waters 48 coniferous forests 48 tropical 48 Scientists theorize 48 humid tropical 48 seroprevalence 48 invasive insect 48 gyres 48 lowland forests 48 overhunting 48 dengue viruses 48 airborne spores 48 humid climates 48 La Nina cooling 48 Tularemia 48 coevolution 47 Toxoplasmosis 47 seabird populations 47 varroa mites 47 Migrating birds 47 Volcanic eruptions 47 La Ninas 47 bird migrations 47 montane 47 Greater Antilles 47 cholera epidemics 47 Aedes aegypti mosquito 47 moth larvae 47 Ice Ages 47 insect borne diseases 47 extinctions 47 Soybean rust 47 terrestrial ecosystems 47 rampant deforestation 47 Subtropical 47 locust infestation 47 Argentine ants 47 swine influenza viruses 47 varroa mite 47 atmospheric circulation 46 penguin colonies 46 Severe drought 46 frog species 46 falciparum 46 dinosaur extinction 46 equatorial Pacific Ocean