The Topographic Signature of Ecosystem Climate Sensitivity in the Western United States
AuthorHoylman, Zachary H.
Jencso, Kelsey G.
Holden, Zachary A.
Martin, Justin T.
AffiliationUniv Arizona, Sch Nat Resources & Environm
MetadataShow full item record
PublisherAMER GEOPHYSICAL UNION
CitationHoylman, Z. H., Jencso, K. G., Hu, J.,Holden, Z. A., Allred, B., Dobrowski, S.,et al. (2019). The topographic signature of ecosystem climate sensitivity in the western United States. Geophysical Research Letters, 46, 14,508-14,520 https://doi.org/10.1029/2019GL085546
JournalGEOPHYSICAL RESEARCH LETTERS
RightsCopyright © 2019. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractIt has been suggested that hillslope topography can produce hydrologic refugia, sites where ecosystem productivity is relatively insensitive to climate variation. However, the ecological impacts and spatial distribution of these sites are poorly resolved across gradients in climate. We quantified the response of ecosystem net primary productivity to changes in the annual climatic water balance for 30 years using pixel-specific linear regression (30-m resolution) across the western United States. The standardized slopes of these models represent ecosystem climate sensitivity and provide a means to identify drought-resistant ecosystems. Productive and resistant ecosystems were most frequent in convergent hillslope positions, especially in semiarid climates. Ecosystems in divergent positions were moderately resistant to climate variability, but less productive relative to convergent positions. This topographic effect was significantly dampened in hygric and xeric climates. In aggregate, spatial patterns of ecosystem sensitivity can be implemented for regional planning to maximize conservation in landscapes more resistant to perturbations.
NoteOpen Access Article
VersionFinal published version
Except where otherwise noted, this item's license is described as Copyright © 2019. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.