Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States

Brynne Lazarus; Matthew J. Germino; Bryce A. Richardson

doi:10.1002/ajb2.1320

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Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States

Formally Refereed

Authors:

Brynne Lazarus, Matthew J. Germino, Bryce A. Richardson

Year:

2019

Type:

Scientific Journal

Station:

Rocky Mountain Research Station

DOI:

https://doi.org/10.1002/ajb2.1320

Source:

American Journal of Botany. 106(7): 922-934.

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Abstract

Physiological responses to temperature extremes are considered strong drivers of species’ demographic responses to climate variability. Plants are typically classified as either avoiders or tolerators in their freezing‐resistance mechanism, but a gradient of physiological‐threshold freezing responses may exist among individuals of a species. Moreover, adaptive significance of physiological freezing responses is poorly characterized, particularly under warming conditions that relax selection on cold hardiness.

Keywords

Artemisia tridentata, Asteraceae, cold hardiness, freezing avoidance, freezing resistance, freezing tolerance, freezing safety margin, ice nucleation temperature, LT50, relaxed selection

Citation

Lazarus, Brynne E.; Germino, Matthew J.; Richardson, Bryce A. 2019. Freezing resistance, safety margins, and survival vary among big sagebrush populations across the western United States. American Journal of Botany. 106(7): 922-934.