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Full-Text Articles in Plant Sciences
Innovation In Rangeland Monitoring: Annual, 30 M, Plant Functional Type Percent Cover Maps For U.S. Rangelands, 1984-2017, Matthew O. Jones, Brady W. Allred, David E. Naugle, Jeremy D. Maestas, Patrick Donnelly, Loretta J. Metz, Jason Karl, Rob Smith, Brandon Bestelmeyer, Chad Boyd, Jay D. Kerby, James D. Mciver
Innovation In Rangeland Monitoring: Annual, 30 M, Plant Functional Type Percent Cover Maps For U.S. Rangelands, 1984-2017, Matthew O. Jones, Brady W. Allred, David E. Naugle, Jeremy D. Maestas, Patrick Donnelly, Loretta J. Metz, Jason Karl, Rob Smith, Brandon Bestelmeyer, Chad Boyd, Jay D. Kerby, James D. Mciver
Articles
Innovations in machine learning and cloud‐based computing were merged with historical remote sensing and field data to provide the first moderate resolution, annual, percent cover maps of plant functional types across rangeland ecosystems to effectively and efficiently respond to pressing challenges facing conservation of biodiversity and ecosystem services. We utilized the historical Landsat satellite record, gridded meteorology, abiotic land surface data, and over 30,000 field plots within a Random Forests model to predict per‐pixel percent cover of annual forbs and grasses, perennial forbs and grasses, shrubs, and bare ground over the western United States from 1984 to 2017. Results were …
Structural And Functional Connectivity As A Driver Of Hillslope Erosion Following Disturbance, Christopher Jason Williams, Frederick B. Pierson, Peter R. Robichaud, Osama Z. Al-Hamdan, Jan Boll, Eva K. Strand
Structural And Functional Connectivity As A Driver Of Hillslope Erosion Following Disturbance, Christopher Jason Williams, Frederick B. Pierson, Peter R. Robichaud, Osama Z. Al-Hamdan, Jan Boll, Eva K. Strand
Articles
Hydrologic response to rainfall on fragmented or burnt hillslopes is strongly influenced by the ensuing connectivity of runoff and erosion processes. Yet cross-scale process connectivity is seldom evaluated in field studies owing to scale limitations in experimental design. This study quantified surface susceptibility and hydrologic response across point to hillslope scales at two degraded unburnt and burnt woodland sites using rainfall simulation and hydrologic modelling. High runoff (31–47 mm) and erosion (154–1893 g m–2) measured at the patch scale (13 m2) were associated with accumulation of fine-scale (0.5-m2) splash-sheet runoff and sediment and concentrated …
The Economics Of Fuel Management: Wildfire, Invasive Plants, And The Dynamics Of Sagebrush Rangelands In The Western United States, Michael H. Taylor, Kimberly Rollins, Mimako Kobayashi, Robin J. Tausch
The Economics Of Fuel Management: Wildfire, Invasive Plants, And The Dynamics Of Sagebrush Rangelands In The Western United States, Michael H. Taylor, Kimberly Rollins, Mimako Kobayashi, Robin J. Tausch
Articles
In this article we develop a simulation model to evaluate the economic efficiency of fuel treatments and apply it to two sagebrush ecosystems in the Great Basin of the western United States: the Wyoming Sagebrush Steppe and Mountain Big Sagebrush ecosystems. These ecosystems face the two most prominent concerns in sagebrush ecosystems relative to wildfire: annual grass invasion and native conifer expansion. Our model simulates long-run wildfire suppression costs with and without fuel treatments explicitly incorporating ecological dynamics, stochastic wildfire, uncertain fuel treatment success, and ecological thresholds. Our results indicate that, on the basis of wildfire suppression costs savings, fuel …
Concentrated Flow Erodibility For Physically Based Erosion Models: Temporal Variability In Disturbed And Undisturbed Rangelands, Osama Z. Al-Hamdan, Frederick B. Pierson, Mark A. Nearing, C. Jason Williams, Jeffry J. Stone, Patrick R. Kormos, Jan Boll, Mark A. Weltz
Concentrated Flow Erodibility For Physically Based Erosion Models: Temporal Variability In Disturbed And Undisturbed Rangelands, Osama Z. Al-Hamdan, Frederick B. Pierson, Mark A. Nearing, C. Jason Williams, Jeffry J. Stone, Patrick R. Kormos, Jan Boll, Mark A. Weltz
Articles
Current physically based overland flow erosion models for rangeland application do not separate disturbed and undisturbed conditions in modeling concentrated flow erosion. In this study, concentrated flow simulations on disturbed and undisturbed rangelands were used to estimate the erodibility and to evaluate the performance of linear and power law equations that describe the relationship between erosion rate and several hydraulic parameters. None of the hydraulic parameters consistently predicted the detachment capacity well for all sites, however, stream power performed better than most of other hydraulic parameters. Using power law functions did not improve the detachment relation with respect to that …
Sensitivity Of Wtp Estimates To Definition Of 'Yes': Reinterpreting Expressed Response Intensity, Mimako Kobayashi, Kimberly Rollins, M. D. R. Evans
Sensitivity Of Wtp Estimates To Definition Of 'Yes': Reinterpreting Expressed Response Intensity, Mimako Kobayashi, Kimberly Rollins, M. D. R. Evans
Articles
Willingness to pay (WTP) estimation typically involves some strategy for mapping nondichotomous contingent valuation (CV) responses onto a dichotomous yes/no dependent variable. We propose a new approach to selecting which responses qualify as ‘yes.’ We apply the proposed method to polychotomous CV data for preventative land management programs in the Great Basin. We also estimate WTP using other methods of response recoding found in the literature. By contrasting the results under different approaches, we demonstrate how and why WTP point estimates vary across recoding methods and discuss the comparative advantages of our more generalized recoding approach that is based on …