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International Journal of Wildland Fire
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 Just Accepted

This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.


Fine-scale factors influence fire regimes in mixed-conifer forests on three high mountains in Mexico

Larissa Yocom, Peter Fule, Don Falk, Celia García-Domínguez, Eladio Cornejo-Oviedo, Peter Brown, José Villanueva-Díaz, Julián Cerano, Citlali Cortés Montaño

Abstract

We investigated the influence of broad- vs. fine-scale factors on fire in an unusual landscape suitable for distinguishing the drivers of fire synchrony. Our study was conducted in the Sierra Madre Oriental mountain range, in northeastern Mexico. We worked in nine sites on three parallel mountains that receive nearly identical broad-scale climatic influence, but between which fires were unlikely to spread. We collected and crossdated samples from 357 fire-scarred trees in nine sites in high-elevation mixed-conifer forests and identified fire dates. We used Jaccard similarity analysis to evaluate synchrony among sites and quantified relationships between climate and fire occurrence. Fires were historically frequent (MFI ranged from 8 to 16 years in all sites), and dates of fire exclusion ranged from 1887 to 1962. We found low fire synchrony among the three mountains, indicating a strong influence of fine-scale factors on fire occurrence. Fire regime attributes were similar across mountains despite the independence of fire dates. La Niña events were associated with fire over time, although not significantly since the 1830s. Our results highlight the importance of scale in describing fire regimes and suggest that we can use fire history to understand controls on complex ecosystem processes and patterns.

WF13214  Accepted 09 May 2014
 
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