Skip to main content
padlock icon - secure page this page is secure

Mountain passes are higher not only in the tropics

Buy Article:

$52.00 + tax (Refund Policy)

A recent article in Ecography by Zuloaga and Kerr (2016) addressed a prediction of Janzen's (1967) classic contention that mountain passes are higher in the tropics: species assemblages separated by steep thermal gradients are less similar than assemblages separated by small thermal gradients. Their results have some surprising and important additional implications. In the New World, mountain passes are in fact higher in both the tropics and near 55°N. This fact allows a strong test of Simpson's (1964) hypothesis that thermal barriers promote allopatric speciation, which leads to higher species richness. Combined with the results of Zuloaga and Kerr, the Simpson/Janzen hypothesis predicts a peak of richness in southern Alaskan and northern British Columbia. Published data are clearly inconsistent with this prediction. High thermal barriers to dispersal do not necessarily lead to greater species richness.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Document Type: Research Article

Publication date: April 1, 2017

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more