Publications
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Sharp increase in central Oklahoma seismicity 2009-2014 induced by massive wastewater injection
Unconventional oil and gas production provides a rapidly growing energy source; however high-producing states in the United States, such as Oklahoma, face sharply rising numbers of earthquakes. Subsurface pressure data required to unequivocally link earthquakes to injection are rarely accessible. Here we use seismicity and hydrogeological models to show that distant fluid migration from high-rate
Authors
Kathleen M. Keranen, Geoffrey A. Abers, Matthew Weingarten, Barbara A. Bekins, Shemin Ge
Fitness in animals correlates with proximity to discontinuities in body mass distributions.
Discontinuous structure in landscapes may cause discontinuous, aggregated species body-mass patterns, reflecting the scales of structure available to animal communities within a landscape. Empirical analyses have shown that the location of species within body mass aggregations, which reflect this scale-specific organization, is non-random with regard to several ecological phenomena, including spec
Authors
David G. Angeler, Craig R. Allen, Anna Vila-Gispert, David Almeida
Crustal permeability: Introduction to the special issue
The topic of crustal permeability is of broad interest in light of the controlling effect of permeability on diverse geologic processes and also timely in light of the practical challenges associated with emerging technologies such as hydraulic fracturing for oil and gas production (‘fracking’), enhanced geothermal systems, and geologic carbon sequestration. This special issue of Geofluids is also
Authors
Steven E. Ingebritsen, Tom Gleeson
Relationships between annual plant productivity, nitrogen deposition and fire size in low-elevation California desert scrub
Although precipitation is correlated with fire size in desert ecosystems and is typically used as an indirect surrogate for fine fuel load, a direct link between fine fuel biomass and fire size has not been established. In addition, nitrogen (N) deposition can affect fire risk through its fertilisation effect on fine fuel production. In this study, we examine the relationships between fire size an
Authors
Leela E. Rao, John R. Matchett, Matthew L. Brooks, Robert Johns, Richard A. Minnich, Edith B. Allen
Seasonal weather patterns drive population vital rates and persistence in a stream fish
Climate change affects seasonal weather patterns, but little is known about the relative importance of seasonal weather patterns on animal population vital rates. Even when such information exists, data are typically only available from intensive fieldwork (e.g., mark–recapture studies) at a limited spatial extent. Here, we investigated effects of seasonal air temperature and precipitation (fall,
Authors
Yoichiro Kanno, Benjamin Letcher, Nathaniel P. Hitt, David A. Boughton, John E. B. Wofford, Elise Zipkin
Habitat structure and body size distributions: Cross-ecosystem comparison for taxa with determinate and indeterminate growth
Habitat structure across multiple spatial and temporal scales has been proposed as a key driver of body size distributions for associated communities. Thus, understanding the relationship between habitat and body size is fundamental to developing predictions regarding the influence of habitat change on animal communities. Much of the work assessing the relationship between habitat structure and bo
Authors
Kirsty L. Nash, Craig R. Allen, Chris Barichievy, Magnus Nystrom, Shana M. Sundstrom, Nicholas A.J. Graham
Replacement cost valuation of Northern Pintail (Anas acuta) subsistence harvest in Arctic and sub-Arctic North America
Migratory species provide economically beneficial ecosystem services to people throughout their range, yet often, information is lacking about the magnitude and spatial distribution of these benefits at regional scales. We conducted a case study for Northern Pintails (hereafter pintail) in which we quantified regional and sub-regional economic values of subsistence harvest to indigenous communitie
Authors
Joshua H. Goldstein, Wayne E. Thogmartin, Kenneth J. Bagstad, James A. Dubovsky, Brady J. Mattsson, Darius J. Semmens, Laura López-Hoffman, James E. Diffendorfer
Spatial variability in survival of adult brook trout within two intensively surveyed headwater stream networks
Headwater stream networks are considered heterogeneous riverscapes, but it is challenging to characterize spatial variability in demographic rates. We estimated site-scale (50 m) survival of adult (>age 1+) brook trout (Salvelinus fontinalis) within two intensively surveyed headwater stream networks by applying an open-population N-mixture approach to count data collected over two consecutive summ
Authors
Yoichiro Kanno, Benjamin Letcher, Jason C. Vokoun, Elise Zipkin
Rate of tree carbon accumulation increases continuously with tree size
Forests are major components of the global carbon cycle, providing substantial feedback to atmospheric greenhouse gas concentrations. Our ability to understand and predict changes in the forest carbon cycle—particularly net primary productivity and carbon storage - increasingly relies on models that represent biological processes across several scales of biological organization, from tree leaves t
Authors
N.L. Stephenson, A.J. Das, R. Condit, S.E. Russo, P.J. Baker, N.G. Beckman, D.A. Coomes, E.R. Lines, W.K. Morris, N. Rüger, E. Álvarez, C. Blundo, S. Bunyavejchewin, G. Chuyong, S.J. Davies, Á. Duque, C.N. Ewango, O. Flores, J.F. Franklin, H.R. Grau, Z. Hao, M. E. Harmon, S.P. Hubbell, D. Kenfack, Y. Lin, J.-R. Makana, A. Malizia, L.R. Malizia, R.J. Pabst, N. Pongpattananurak, S.-H. Su, I-F. Sun, S. Tan, D. Thomas, P. J. van Mantgem, X. Wang, S.K. Wiser, M.A. Zavala
Market forces and technological substitutes cause fluctuations in the value of bat pest-control services for cotton
Critics of the market-based, ecosystem services approach to biodiversity conservation worry that volatile market conditions and technological substitutes will diminish the value of ecosystem services and obviate the “economic benefits” arguments for conservation. To explore the effects of market forces and substitutes on service values, we assessed how the value of the pest-control services provid
Authors
Laura López-Hoffman, Ruscena Wiederholt, Chris Sansone, Kenneth J. Bagstad, Paul M. Cryan, James E. Diffendorfer, Joshua Goldstein, Kelsie LaSharr, John Loomis, Gary McCracken, Rodrigo A. Medellin, Amy Russell, Darius J. Semmens
Inferences about population dynamics from count data using multi-state models: A comparison to capture-recapture approaches
Wildlife populations consist of individuals that contribute disproportionately to growth and viability. Understanding a population's spatial and temporal dynamics requires estimates of abundance and demographic rates that account for this heterogeneity. Estimating these quantities can be difficult, requiring years of intensive data collection. Often, this is accomplished through the capture and re
Authors
Evan H. Campbell Grant, Elise Zipkin, Sillett T. Scott, Richard Chandler, J. Andrew Royle
Powell Center Newsletter, Volume 1, Issue 2
Bi-annual newsletter for the John Wesley Powell Center for Analysis and Synthesis, covering news from the last half of FY2014
Authors
Marcia McNiff