Publications
Below are publications associated with the Southwest Biological Science Center's research.
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Filter Total Items: 1519
Only sun-lit leaves of the uppermost canopy exceed both air temperature and photosynthetic thermal optima in a wet tropical forest Only sun-lit leaves of the uppermost canopy exceed both air temperature and photosynthetic thermal optima in a wet tropical forest
Tropical forests have evolved under relatively narrow temperature regimes, and therefore may be more susceptible to climatic change than forests in higher latitudes. Recent evidence shows that lowland tropical forest canopies may already be exceeding thermal maxima for photosynthesis. Height can strongly influence both the microclimate and physiology of forest canopy foliage, yet...
Authors
Benjamin D. Miller, Kelsey R. Carter, Sasha C. Reed, Tana E. Wood, Molly A. Cavaleri
Seasonal precipitation and soil moisture relationships across forests and woodlands in the southwestern United States Seasonal precipitation and soil moisture relationships across forests and woodlands in the southwestern United States
Precipitation [P: mm] controls forest and woodland dynamics in the southwestern United States (SWUS) by altering soil moisture [θ: mm3 mm−3] availability, but the influence of P on θ is complex, varying across space and time. We evaluated seasonal P and θ relationships at shallow (0‐20 cm) and intermediate (50 cm) soil depths for 9 semiarid forest and woodland sites (56 total years)...
Authors
C.R. Koehn, M.D. Petrie, John B. Bradford, M.E. Litvak, S. Strachan
Coexistence of multiple leaf nutrient resorption strategies in a single ecosystem Coexistence of multiple leaf nutrient resorption strategies in a single ecosystem
Leaf resorption is critical for considerations of how plants use and recycle nutrients, but fundamental unknowns remain regarding the controls over plant nutrient resorption. Empirical studies suggest at least three basic types of resorption control, including (i) stoichiometric control, (ii) nutrient limitation control, and (iii) nutrient concentration control strategies. However, which
Authors
Chen Hao, Sasha C. Reed, Xiaotao Lü, Kongcao Xiao, Kelin Wang, Dejun Li
Future regulated flows of the Colorado River in Grand Canyon foretell decreased areal extent of sediment and increases in riparian vegetation Future regulated flows of the Colorado River in Grand Canyon foretell decreased areal extent of sediment and increases in riparian vegetation
Sediment transfer, or connectivity, by aeolian processes between channel-proximal and upland deposits in river valleys is important for the maintenance of river corridor biophysical characteristics. In regulated river systems, dams control the magnitude and duration of discharge. Alterations to the flow regime driven by dams that increase the inundation duration of sediment, or which...
Authors
Alan Kasprak, Joel B. Sankey, Bradley J. Butterfield
Improving Landsat predictions of rangeland fractional cover with multitask learning and uncertainty Improving Landsat predictions of rangeland fractional cover with multitask learning and uncertainty
Operational satellite remote sensing products are transforming rangeland management and science. Advancements in computation, data storage and processing have removed barriers that previously blocked or hindered the development and use of remote sensing products. When combined with local data and knowledge, remote sensing products can inform decision‐making at multiple scales.We used...
Authors
Brady W. Allred, Brandon T. Bestelmeyer, Chad S. Boyd, Christopher Brown, Kirk W. Davies, Michael C. Duniway, Lisa M. Ellsworth, Tyler A. Erickson, Samuel D. Fuhlendorf, Timothy V. Griffiths, Vincent Jansen, Matthew O. Jones, Jason W. Karl, Anna C. Knight, Jeremy D. Maestas, Jonathan J. Maynard, Sarah E. McCord, David E. Naugle, Heath D. Starns, Dirac Twidwell, Daniel R. Uden
Field evaluation of a compact, polarizing topo‐bathymetric lidar across a range of river conditions Field evaluation of a compact, polarizing topo‐bathymetric lidar across a range of river conditions
This paper summarizes field trials to evaluate the performance of a prototype compact topo‐bathymetric lidar sensor for surveying rivers. The sensor uses a novel polarization technique to distinguish between laser returns from the water surface and streambed and its size and weight permit deployment from a small unmanned aerial system (sUAS) or a boat. Field testing was designed to...
Authors
Paul J. Kinzel, Carl J. Legleiter, Paul E. Grams
A reporting format for leaf-level gas exchange data and metadata A reporting format for leaf-level gas exchange data and metadata
Leaf-level gas exchange data support the mechanistic understanding of plant fluxes of carbon and water. These fluxes inform our understanding of ecosystem function, are an important constraint on parameterization of terrestrial biosphere models, are necessary to understand the response of plants to global environmental change, and are integral to efforts to improve crop production...
Authors
Kim S. Ely, Alistair Rogers, Deborah A. Agarwal, Elizabeth A. Ainsworth, Loren Albert, Ashehad Ali, Jeremiah Anderson, Michael J. Aspinwall, Chandra Bellasio, Carl Bernacchi, Steve Bonnage, Thomas N. Buckley, James Bunce, Angela C. Burnett, Florian A. Busch, Amanda Cavanagh, Lucas A. Cernusak, Robert Crystal-Ornelas, Joan Damerow, Kenneth J. Davidson, Martin G. De Kauwe, Michael C. Dietze, Tomas F. Domingues, Mirindi Eric Dusenge, David S. Ellsworth, John R. Evans, Paul Gauthier, Bruno O. Gimenez, Elizabeth P. Gordon, Christopher M. Gough, Aud H. Halbritter, David T. Hanson, Mary A. Heskel, J. Aaron Hogan, Jason R. Hupp, Kolby Jardine, Jens Kattge, Trevor F. Keenan, Johannes Kromdijk, Dushan P. Kumarathunge, Julien Lamour, Andrew D.B. Leakey, David S. LeBauer, Qianyu Li, Marjorie R. Lundgren, Nate McDowell, Katherine Meacham-Hensold, Belinda E. Medlyn, David J.P. Moore, Robinson Negron-Juarez, Ulo Niinemets, Colin P. Osborne, Alexandria L. Pivovaroff, Hendrik Poorter, Sasha C. Reed, Youngryel Ryu, Alvaro Sanz-Saez, Stephanie C. Schmiege, Shawn P. Serbin, Thomas D. Sharkey, Martijn Slot, Nicholas G. Smith, Balasaheb V. Sonawane, Paul F. South, Daisy S. Souza, Joseph Ronald Stinziano, Ellen Stuart-Haëntjens, Samuel H. Taylor, Mauricio D. Tejera, Johan Uddling, Vigdis Vandvik, Charuleka Varadharajan, Anthony P. Walker, Berkley J. Walker, Jeffrey M. Warren, Danielle A. Way, Brett T. Wolfe, Jin Wu, Stan D. Wullschleger, Chonggang Xu, Zhengbing Yan, Dedi Yang
Muted responses to chronic experimental nitrogen deposition on the Colorado Plateau Muted responses to chronic experimental nitrogen deposition on the Colorado Plateau
Anthropogenic nitrogen (N) deposition is significantly altering both community structure and ecosystem processes in terrestrial ecosystems across the globe. However, our understanding of the consequences of N deposition in dryland systems remains relatively poor, despite evidence that drylands may be particularly vulnerable to increasing N inputs. In this study, we investigated the...
Authors
Michala Lee Phillips, Daniel E. Winkler, Robin H. Reibold, Brooke Bossert Osborne, Sasha C. Reed
Monitoring the results of stream corridor restoration Monitoring the results of stream corridor restoration
Often overlooked and underfunded, ecological monitoring is an essential component of stream-restoration work. It helps practitioners to identify successful restoration practices, detect ineffective ones, and adjust their adaptive-management activities to improve efficacy (Bernhardt and Palmer 2011). Monitoring, along with research and modeling, are the three legs of the scientific stool...
Authors
Daniel Bunting, Andrew M. Barton, Brooke M. Bushman, Barry Chernoff, Kelon Crawford, David J. Dean, Eduardo Gonzalez, Jeanmarie Haney, O. Hinojosa-Huerta, Helen M. Poulos, J Renfrow, Holly E. Richter, Carlos A. Sifuentes Lugo, Juliet C. Stromberg, Dale S. Turner, K. Urbanczyk, Mark K. Briggs
Broader impacts for ecologists: Biological soil crust as a model system for education Broader impacts for ecologists: Biological soil crust as a model system for education
Biological soil crusts (biocrusts) are a complex community of algae, cyanobacteria, lichens, bryophytes, and assorted bacteria, fungi, archaea, and bacteriophages that colonize the soil surface. Biocrusts are particularly common in drylands and are found in arid and semiarid ecosystems worldwide. While diminutive in size, biocrusts often cover large terrestrial areas, provide numerous...
Authors
Alasha M. Faist, Anita J. Antoninka, Nichole N. Barger, Matthew A. Bowker, V. Bala Chaudhary, Caroline A. Havrilla, Elisabeth Huber-Saanwald, Sasha C. Reed, Bettina Weber
Testing which axes of species differentiation underlie covariance of phylogeographic similarity among montane sedge species Testing which axes of species differentiation underlie covariance of phylogeographic similarity among montane sedge species
Co‐distributed species may exhibit similar phylogeographic patterns due to shared environmental factors or discordant patterns attributed to the influence of species‐specific traits. Although either concordant or discordant patterns could occur due to chance, stark differences in key traits (e.g., dispersal ability) may readily explain differences between species. Multiple species’...
Authors
Richard G.J. Hodel, Robert Massatti, Sasha G.D. Bishop, L. Lacey Knowles
Dominant Sonoran Desert plant species have divergent phenological responses to climate change Dominant Sonoran Desert plant species have divergent phenological responses to climate change
The southwestern U.S. is a global hotspot of climate change. Models project that temperatures will continue to rise through the end of the 21st century, accompanied by significant changes to the hydrological cycle. Within the Sonoran Desert, a limited number of studies have documented climate change impacts on the phenology of native plant species. Much of this phenological work to...
Authors
Luke J Zachmann, John F. Wiens, Kim Franklin, Shelley D. Crausbay, Vincent A. Landau, Seth M. Munson