Legacy effects of drought in the southwestern United States: A multi‐species synthesis

Drew M. P. Peltier; Michael Fell; Kiona Ogle

doi:10.1002/ecm.1219

journal article Aug 01, 2016

Legacy effects of drought in the southwestern United States: A multi‐species synthesis

Drew M. P. Peltier

Michael Fell Kiona Ogle

Ecological Monographs Vol. 86 No. 3 pp. 312-326 · Wiley

View at Publisher Save 10.1002/ecm.1219

Abstract

AbstractUnderstanding impacts of drought on tree growth and forest health is of major concern given projected climate change. Droughts may become more common in the Southwest due to extreme temperatures that will drive increased evapotranspiration and lower soil moisture, in combination with uncertain precipitation changes. Utilizing ~1.3 million tree‐ring widths from the International Tree Ring Data Bank representing 10 species (eight conifers, two oaks) in the Southwest, we evaluated the effects of drought on tree growth. We categorized ring widths by formation year in relation to drought (pre‐drought, drought year, and post‐drought), and we used a mixed‐effects model to estimate the effects of current and antecedent precipitation and temperature on tree growth during the post‐drought recovery period. This allowed us to assess changes in sensitivity of tree growth to precipitation and temperature at multiple timescales following multiple droughts, and to evaluate drought resistance and recovery in these species. The effects of precipitation and temperature on ring widths following drought varied among species and time since drought. Across species, 16% of the climate effects (i.e., “sensitivities”) were significantly different from their pre‐drought values. Species differed, with some showing increased sensitivities to precipitation and temperature following drought, and others showing decreased sensitivities. Furthermore, some species (e.g.,Abies concolorandPinus ponderosa) showed low resistance and slow recovery, with changes in growth sensitivities persisting up to 5 yr; others (e.g.,Juniperspp.) showed high resistance, such that their climatic sensitivities did not change. Among species, the importance of different antecedent climate variables changed with time since drought. Though a majority of species responded positively to same‐year precipitation pre‐drought, all 10 species were positively affected by same‐year precipitation the second year after drought. Our results demonstrate tree growth sensitivities vary among species and with time since drought, raising questions about physiological mechanisms and implications for forest health under future drought.

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Citations

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References

Details

Published: Aug 01, 2016
Vol/Issue: 86(3)
Pages: 312-326
License: View

Authors

D

Drew M. P. Peltier

Department of Biological Sciences Northern Arizona University Flagstaff Arizona 86011 USA

M

Michael Fell

Informatics and Computing Program Northern Arizona University Flagstaff Arizona 86011 USA; School of Life Sciences Arizona State University Tempe Arizona 85287 USA

K

Kiona Ogle

Department of Biological Sciences Northern Arizona University Flagstaff Arizona 86011 USA; Informatics and Computing Program Northern Arizona University Flagstaff Arizona 86011 USA

Funding

National Science Foundation Award: #1458867

Cite This Article

Drew M. P. Peltier, Michael Fell, Kiona Ogle (2016). Legacy effects of drought in the southwestern United States: A multi‐species synthesis. Ecological Monographs, 86(3), 312-326. https://doi.org/10.1002/ecm.1219

Legacy effects of drought in the southwestern United States: A multi‐species synthesis

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