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Annual Review of Ecology, Evolution, and Systematics

Volume 54, 2023

Sky Islands Are a Global Tool for Predicting the Ecological and Evolutionary Consequences of Climate Change

Abstract

Sky islands are unique geologic formations, home to populations of organisms that have weathered climate change since the Pleistocene. Long-term isolation and climatic differences between sky islands and adjacent mountain chains result in natural laboratories well suited for examining the direct effects of climate change. Here, we review the global sky island literature to examine how taxa have responded to climate change. Results show lineage formation, reduced genetic variation, and trait evolution across taxa driven by genetic drift and natural selection. These effects continue today due to ongoing habitat reduction and steep selective gradients on sky islands relative to mountain chains. Comparative studies and experimental manipulations are needed to build broad inference into how past climate change has shaped the structure and function of whole ecosystems. The next era of sky island research is poised to create a model for climate change responses and eco-evolutionary dynamics, with profound conservation implications.

Keyword(s): climate change, convergent evolution, genetic variation, natural laboratory, relict populations, sky island
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/content/journals/10.1146/annurev-ecolsys-102221-050029
2023-11-02
2024-05-08
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/content/journals/10.1146/annurev-ecolsys-102221-050029
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Sky Islands Are a Global Tool for Predicting the Ecological and Evolutionary Consequences of Climate Change
Annual Review of Ecology, Evolution, and Systematics 54, 219 (2023); https://doi.org/10.1146/annurev-ecolsys-102221-050029
/content/journals/10.1146/annurev-ecolsys-102221-050029
/content/journals/10.1146/annurev-ecolsys-102221-050029
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