Fifty Years of Mountain Passes: A Perspective on Dan Janzen's Classic Article.
In 1967, Dan Janzen published "Why Mountain Passes Are Higher in the Tropics" in The American Naturalist. Janzen's seminal article has captured the attention of generations of biologists and continues to inspire theoretical and empirical work. The underlying assumptions and derived predictions are broadly synthetic and widely applicable. Consequently, Janzen's "seasonality hypothesis" has proven relevant to physiology, climate change, ecology, and evolution. To celebrate the fiftieth anniversary of this highly influential article, we highlight the past, present, and future of this work and include a unique historical perspective from Janzen himself.
['Sheldon|Kimberly S|KS|', 'Huey|Raymond B|RB|', 'Kaspari|Michael|M|', 'Sanders|Nathan J|NJ|']
D000064:Acclimatization D000531:Altitude D000818:Animals D003364:Costa Rica D004463:Ecology D017753:Ecosystem D049810:Genetic Speciation D005843:Geography D049673:History, 20th Century D006801:Humans D012621:Seasons D014329:Tropical Climate
tropics seasonality dispersal geographic range size temperature variation thermal sensitivity