Mountain passes are higher not only in the tropics

Currie, David J. (2017) Mountain passes are higher not only in the tropics. Ecography, 40 4: 459-460. doi:10.1111/ecog.02695

Author Currie, David J.
Title Mountain passes are higher not only in the tropics
Journal name Ecography   Check publisher's open access policy
ISSN 1600-0587
Publication date 2017-04-01
Sub-type Article (original research)
DOI 10.1111/ecog.02695
Open Access Status Not yet assessed
Volume 40
Issue 4
Start page 459
End page 460
Total pages 2
Place of publication Malden, MA, United States
Publisher Wiley-Blackwell Publishing
Language eng
Subject 1105 Ecology, Evolution, Behavior and Systematics
Abstract 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.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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