John Wesley Powell Center for Analysis and Synthesis

Publications

Filter Total Items: 164
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Year Published: 2019

Conceptualizing ecological responses to dam removal: If you remove it, what's to come?

One of the desired outcomes of dam decommissioning and removal is the recovery of aquatic and riparian ecosystems. To investigate this common objective, we synthesized information from empirical studies and ecological theory into conceptual models that depict key physical and biological links driving ecological responses to removing dams. We...

Bellmore, J. Ryan; Pess, George R.; Duda, Jeffrey J.; O'Connor, Jim E.; East, Amy E.; Foley, Melissa M.; Wilcox, Andrew C.; Major, Jon J.; Shafroth, Patrick B.; Morley, Sarah A.; Magirl, Christopher S.; Anderson, Chauncey W.; Evans, James E.; Torgersen, Christian E.; Craig, Laura S.

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Year Published: 2019

How hydrologic connectivity regulates water quality in river corridors

Downstream flow in rivers is repeatedly delayed by hydrologic exchange with off‐channel storage zones where biogeochemical processing occurs. We present a dimensionless metric that quantifies river connectivity as the balance between downstream flow and the exchange of water with the bed, banks, and floodplains. The degree of connectivity directly...

Harvey, Judson; Gomez-Velez, Jesus; Schmadel, Noah; Scott, Durelle; Boyer, Elizabeth W.; Alexander, Richard; Eng, Ken; Golden, Heather E.; Kettner, Albert; Konrad, Christopher; Moore, Richard; Pizzuto, Jim; Schwarz, Gregory E.; Soulsby, Chris; Choi, Jay

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Year Published: 2019

Understanding how microbiomes influence the systems they inhabit

Translating the ever-increasing wealth of information on microbiomes (environment, host, or built environment) to advance the understanding of system-level processes is proving to be an exceptional research challenge. One reason for this challenge is that relationships between characteristics of microbiomes and the system-level processes they...

Hall, E.K.; Bernhardt, E. S.; Bier, R.L.; Bradford, M.A.; Boot, C.M.; Cotner, J.B.; del Giorgio, P.A.; Evans, S.E.; Graham, E.B.;; Jones, S.E.; Lennon, J.T.; Locey, Kenneth J.; Nemergut, D.; Osborne, B.; Rocca, J.D.; Schimel, J.S.; Waldrop, Mark; Wallenstein, M.W.

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Year Published: 2018

Thresholds of lake and reservoir connectivity in river networks control nitrogen removal

Lakes, reservoirs, and other ponded waters are ubiquitous features of the aquatic landscape, yet their cumulative role in nitrogen removal in large river basins is often unclear. Here we use predictive modeling, together with comprehensive river water quality, land use, and hydrography datasets, to examine and explain the influences of more than...

Schmadel, Noah M.; Harvey, Judson; Alexander, Richard; Schwarz, Gregory E.; Moore, Richard; Eng, Ken; Gomez-Velez, Jesus D.; Boyer, Elizabeth W.; Scott, Durelle

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Year Published: 2018

The metabolic regimes of 356 rivers in the United States

A national-scale quantification of metabolic energy flow in streams and rivers can improve understanding of the temporal dynamics of in-stream activity, links between energy cycling and ecosystem services, and the effects of human activities on aquatic metabolism. The two dominant terms in aquatic metabolism, gross primary production (GPP) and...

Appling, Alison P.; Read, Jordan S.; Winslow, Luke A.; Arroita, Maite; Bernhardt, Emily S.; Griffiths, Natalie A.; Hall, Robert O.; Harvey, Judson W.; Heffernan, James B.; Stanley, Emily H.; Stets, Edward G.; Yackulic, Charles B.

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Year Published: 2018

The natural capital accounting opportunity: Let's really do the numbers

The nation’s economic accounts provide objective, regular, and standardized information routinely relied upon by public and private decision makers. But they are incomplete. The U.S. and many other nations currently do not account for the natural capital — such as the wildlife, forests, grasslands, soils, and water bodies—upon which all other...

Boyd, James W.; Bagstad, Kenneth J.; Ingram, Jane Carter; Shapiro, Carl D.; Adkins, Jeffery; Casey, C. Frank; Duke, Clifford S.; Glynn, Pierre D.; Goldman, Erica; Grasso, Monica; Hass, Julie L.; Johnson, Justin A.; Lange, Glenn-Marie; Matuszak, John; Miller, Ann; Oleson, Kirsten L. L.; Posner, Stephen M.; Rhodes, Charles; Soulard, Francois; Vardon, Michael; Villa, Ferdinando; Voigt, Brian; Wentland, Scott

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Year Published: 2018

Growth and survival relationships of 71 tree species with nitrogen and sulfur deposition across the conterminous U.S.

Atmospheric deposition of nitrogen (N) influences forest demographics and carbon (C) uptake through multiple mechanisms that vary among tree species. Prior studies have estimated the effects of atmospheric N deposition on temperate forests by leveraging forest inventory measurements across regional gradients in deposition. However, in the United...

Horn, Kevin J; Thomas, R Quinn; Clark, Christopher M.; Pardo, Linda H; Fenn, Mark E.; Lawrence, Gregory B.; Perakis, Steven; Smithwick, Erica A.H.; Baldwin, Doug; Braun, Sabine; Nordin, Annika; Perry, Charles H.; Phelan, Jennifer N; Schaberg, Paul G.; St Clair, Samuel B; Warby, Richard; Watmough, Shaun A.

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Year Published: 2018

Quantifying climate sensitivity and climate-driven change in North American amphibian communities

Changing climate will impact species’ ranges only when environmental variability directly impacts the demography of local populations. However, measurement of demographic responses to climate change has largely been limited to single species and locations. Here we show that amphibian communities are responsive to climatic variability, using >...

Miller, David A.W.; Campbell Grant, Evan H.; Muths, Erin L.; Amburgey, Staci M.; Adams, M.J.; Joseph, Maxwell B.; Waddle, J. Hardin; Johnson, Pieter T.J.; Ryan, Maureen E.; Schmidt, Benedikt R.; Calhoun, Daniel L.; Davis, Courtney L.; Fisher, Robert N.; Green, David M.; Hossack, Blake R.; Rittenhouse, Tracy A.G.; Walls, Susan C.; Bailey, Larissa L.; Cruickshank, Sam S.; Fellers, Gary M.; Gorman, Thomas A.; Haas, Carola A.; Hughson, Ward; Pilliod, David S.; Price, Steven J.; Ray, Andrew M.; Sadinski, Walter; Saenz, Daniel; Barichivich, William J.; Brand, Adrianne B.; Brehme, Cheryl S.; Dagit, Rosi; Delaney, Katy S.; Glorioso, Brad M.; Kats, Lee B.; Kleeman, Patrick M.; Pearl, Christopher; Rochester, Carlton J.; Riley, Seth P. D.; Roth, Mark F.; Sigafus, Brent

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Year Published: 2018

A method to detect discontinuities in census data

The distribution of pattern across scales has predictive power in the analysis of complex systems. Discontinuity approaches remain a fruitful avenue of research in the quest for quantitative measures of resilience because discontinuity analysis provides an objective means of identifying scales in complex systems and facilitates delineation of...

Barichievy, C.; Angeler, D. G.; Eason, T. N.; Garmestani, A.S.; Nash, K.L.; Stow, C.A.; Sundstrom, S.; Allen, Craig R.

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Year Published: 2018

The distribution and role of functional abundance in cross‐scale resilience

The cross‐scale resilience model suggests that system‐level ecological resilience emerges from the distribution of species’ functions within and across the spatial and temporal scales of a system. It has provided a quantitative method for calculating the resilience of a given system and so has been a valuable contribution to a largely qualitative...

Sundstrom, S.M.; Angeler, D. G.; Barichievy, C.; Eason, T. N.; Garmestani, A.S.; Gunderson, L.; Knutson, M.; Nash, K.L.; Spanbauer, T. L.; Stow, C.A.; Allen, Craig R.

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Year Published: 2018

Differing modes of biotic connectivity within freshwater ecosystem mosaics

We describe a collection of aquatic and wetland habitats in an inland landscape, and their occurrence within a terrestrial matrix, as a “freshwater ecosystem mosaic” (FEM). Aquatic and wetland habitats in any FEM can vary widely, from permanently ponded lakes, to ephemerally ponded wetlands, to groundwater‐fed springs, to flowing rivers and...

Mushet, David M.; Alexander, Laurie C.; Bennet, Micah; Schofield, Kate; Christensen, Jay R.; Ali, Genevieve; Pollard, Amina I.; Fritz, Ken M.; Lang, Megan
Mushet, D. M., Alexander, L. C., Bennett, M., Schofield, K., Pollard, A., Christensen, J. R., Ali, G., Fritz, K., and Lang, M. W., 2018, Differing modes of biotic connectivity within freshwater ecosystem mosaics: Journal of the American Water Resources Association. DOI 10.1111/1752-1688.12683.

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Year Published: 2018

Improving understanding of soil organic matter dynamics by triangulating theories, measurements, and models

Soil organic matter (SOM) turnover increasingly is conceptualized as a tension between accessibility to microorganisms and protection from decomposition via physical and chemical association with minerals in emerging soil biogeochemical theory. Yet, these components are missing from the original mathematical models of belowground carbon dynamics...

Blankinship, Joseph C.; Crow, Susan E.; Berhe, Asmeret Asefaw; Druhan, Jennifer L.; Heckman, Katherine A.; Keiluweit, Marco; Lawrence, Corey R.; Marin-Spiotta, Erika; Plante, Alain F.; Rasmussen, Craig; Schadel, Christina; Schmiel, Joshua P.; Sierra, Carlos A.; Thomson, Aaron; Wagai, Rota; Weider, William R.
Blankinship, J. C., Berhe, A. A., Crow, S. E., Druhan, J. L., Heckman, K. A., Keiluweit, M., et al. (2018). Improving understanding of soil organic matter dynamics by triangulating theories, measurements, and models. Biogeochemistry, 1–13. http://doi.org/10.1007/s10533-018-0478-2