Pre-fire drought and competition mediate post-fire conifer mortality in western U.S. National Parks

Ecological Applications : a Publication of the Ecological Society of America
Phillip J van MantgemNathan L Stephenson

Abstract

Tree mortality is an important outcome of many forest fires. Extensive tree injuries from fire may lead directly to mortality, but environmental and biological stressors may also contribute to tree death. However, there is little evidence showing how the combined effects of two common stressors, drought and competition, influence post-fire mortality. Geographically broad observations of three common western coniferous trees subjected to prescribed fire showed the likelihood of post-fire mortality was related to intermediate-term (10 yr) pre-fire average radial growth, an important component of tree vigor. Path analysis showed that indices of competition and drought stress prior to fire can be described in terms of joint effects on growth, indirectly affecting post-fire mortality. Our results suggest that the conditions that govern the relationship between growth and mortality in unburned stands may also apply to post-fire environments. Thus, biotic and abiotic changes that affect growth negatively (e.g., drought stress) or positively (e.g., growth releases following thinning treatments) prior to fire may influence expressed fire severity, independent of fire intensity (e.g., heat flux, residence time). These relationships sugge...Continue Reading

References

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Aug 23, 2012·Ecological Applications : a Publication of the Ecological Society of America·Joseph B Fontaine, Patricia L Kennedy
Jul 23, 2013·Ecology Letters·Phillip J van MantgemLorriane Flint
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Nov 20, 2016·Ecology·Adrian J DasKristin P Davis
Dec 22, 2016·Ecology Letters·Derek J N YoungAndrew M Latimer

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Citations

Jun 12, 2020·Ecological Applications : a Publication of the Ecological Society of America·L A Marshall, D A Falk
Aug 22, 2020·Bioscience·Jonathan D CoopKyle C Rodman
Aug 3, 2021·Ecological Applications : a Publication of the Ecological Society of America·Susan J PrichardPratima Khatri-Chhetri
Dec 7, 2021·Ecological Applications : a Publication of the Ecological Society of America·Tucker J FurnissJames A Lutz

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