Show simple item record

dc.contributor.authorHolyman, Zachary H.
dc.contributor.authorJencso, Kelsey G.
dc.contributor.authorHu, Jia
dc.contributor.authorMartin, Justin T.
dc.contributor.authorHolden, Zachary A.
dc.contributor.authorSeielstad, Carl A.
dc.contributor.authorRowell, Eric M.
dc.identifier.citationHolyman, Zachary H. , Kelsey G. Jencso, Jia Hu, Justin T. Martin, Zachary A. Holden, Carl A. Seielstad, and Eric M. Rowell. "Hillslope Topography Mediates Spatial Patterns of Ecosystem Sensitivity to Climate." Journal of Geophysical Research 123, no. 2 (February 2018): 353-371. DOI:10.1002/2017JG004108.en_US
dc.description.abstractUnderstanding how hillslope topography modulates ecosystem dynamics across topoclimatic gradients is critical for predicting future climate change impacts on vegetation function. We examined the influence of hillslope topography on ecosystem productivity, structure, and photosynthetic activity across a range of water and energy availability using three independent methods in a forested watershed (Montana, USA): 308 tree cores; light detection and ranging quantification of stem density, basal area, foliar biomass, and total biomass; and the enhanced vegetation index (EVI; 1984–2012). Multiple linear regression analysis across three conifer species revealed significant increases in measured basal area increment growth rates (from 56 to 2,058 mm2/yr) with increasing values of the topographic wetness index and decreases in the climatic water deficit. At the watershed scale, we observed strong gradients in total biomass (e.g., 52 to 75 Mg/ha), which increased from ridgelines to convergent hollows. The most predominant topographic organization of forest biomass occurred along locations of climatically driven water limitations. Similarly, an analysis of growing season EVI indicated enhanced photosynthetic activity and a prolonged growing season in convergent hillslope positions. Collectively, these analyses confirm that within water‐limited landscapes, meter‐scale differences in topographic position can mediate the effects of the local energy balance and contribute to large differences in local hydrometeorological processes that are a necessary consideration for quantifying spatial patterns of ecosystem productivity. Further, they suggest that local topography and its topology with regional climate may become increasingly important for understanding spatial patterns of ecosystem productivity, mortality, and resilience as regional climates become more arid.en_US
dc.rightsThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).en_US
dc.titleHillslope Topography Mediates Spatial Patterns of Ecosystem Sensitivity to Climateen_US
mus.citation.journaltitleJournal of Geophysical Researchen_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.universityMontana State University - Bozemanen_US
mus.contributor.orcidHu, Jia|0000-0001-6858-6659en_US

Files in this item


This item appears in the following Collection(s)

Show simple item record

MSU uses DSpace software, copyright © 2002-2017  Duraspace. For library collections that are not accessible, we are committed to providing reasonable accommodations and timely access to users with disabilities. For assistance, please submit an accessibility request for library material.