Search Results - "James, Darren K."

Abrupt transitions in a southwest USA desert grassland related to the Pacific Decadal Oscillation by Christensen, Erica M., James, Darren K., Randall, Robb M., Bestelmeyer, Brandon T.

“…Prediction of abrupt ecosystem transitions resulting from climatic change will be an essential element of adaptation strategies in the coming decades. In the…”
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Biocrust carbon exchange varies with crust type and time on Chihuahuan Desert gypsum soils by Hoellrich, Mikaela R, James, Darren K, Bustos, David, Darrouzet-Nardi, Anthony, Santiago, Louis S, Pietrasiak, Nicole

“…In dryland systems, biological soil crusts (biocrusts) can occupy large areas of plant interspaces, where they fix carbon following rain. Although distinct…”
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Landscape characteristics shape surface soil microbiomes in the Chihuahuan Desert by Hansen, Frederick A, James, Darren K, Anderson, John P, Meredith, Christy S, Dominguez, Andrew J, Pombubpa, Nuttapon, Stajich, Jason E, Romero-Olivares, Adriana L, Salley, Shawn W, Pietrasiak, Nicole

“…Soil microbial communities, including biological soil crust microbiomes, play key roles in water, carbon and nitrogen cycling, biological weathering, and other…”
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Grass-Shrub Competition in Arid Lands: An Overlooked Driver in Grassland–Shrubland State Transition? by Pierce, Nathan A., Archer, Steven R., Bestelmeyer, Brandon T., James, Darren K.

“…Traditional models of state transition in arid lands emphasize changes in disturbance regimes and abiotic feedbacks that promote the degradation of grassland…”
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A test of critical thresholds and their indicators in a desertification-prone ecosystem: more resilience than we thought by Bestelmeyer, Brandon T., Duniway, Michael C., James, Darren K., Burkett, Laura M., Havstad, Kris M.

“…Theoretical models predict that drylands can cross critical thresholds, but experimental manipulations to evaluate them are non‐existent. We used a long‐term…”
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Effect of light intensity and wavelength on concentration of plant secondary metabolites in the leaves of Flourensia cernua by Estell, Rick E., Fredrickson, Ed L., James, Darren K.

“…Flourensia cernua (tarbush) is a shrub that has encroached into grasslands in many areas of the northern Chihuahuan Desert and contains high levels of…”
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Seasonal Divergence of Landscape Use by Heritage and Conventional Cattle on Desert Rangeland by Spiegal, Sheri, Estell, Richard E., Cibils, Andres F., James, Darren K., Peinetti, H. Raul, Browning, Dawn M., Romig, Kirsten B., Gonzalez, Alfredo L., Lyons, Andrew J., Bestelmeyer, Brandon T.

“…Adopting livestock with heritage genetics may help to improve the sustainability of agriculture on rangelands with harsh, challenging conditions. In the…”
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Scale-Dependent Feedbacks Between Patch Size and Plant Reproduction in Desert Grassland by Svejcar, Lauren N, Bestelmeyer, Brandon T, Duniway, Michael C, James, Darren K

“…Theoretical models suggest that scale-dependent feedbacks between plant reproductive success and plant patch size govern transitions from highly to sparsely…”
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Novel Use of Image Time Series to Distinguish Dryland Vegetation Responses to Wet and Dry Years by Myers, Emily R., Browning, Dawn M., Burkett, Laura M., James, Darren K., Bestelmeyer, Brandon T.

“…Remote sensing methods are commonly used to assess and monitor ecosystem conditions in drylands, but accurate classification and detection of ecological state…”
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Erratum to: Scale-Dependent Feedbacks Between Patch Size and Plant Reproduction in Desert Grassland by Svejcar, Lauren N., Bestelmeyer, Brandon T., Duniway, Michael C., James, Darren K.

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Synchronous species responses reveal phenological guilds: implications for management by Browning, Dawn M., Crimmins, Theresa M., James, Darren K., Spiegal, Sheri, Levi, Matthew R., Anderson, John P., Peters, Debra P. C.

“…Phenological studies are critical for understanding the ability of terrestrial ecosystems to respond to changes in climate. Monitoring seasonal transitions at…”
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Within-plant distribution of volatile compounds on the leaf surface of Flourensia cernua by Estell, Rick E., James, Darren K., Fredrickson, Ed L., Anderson, Dean M.

“…We are using Flourensia cernua as a shrub model to study how terpenes affect livestock herbivory. Two experiments were conducted to examine distribution of…”
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Abrupt transitions in a southwest USA desert grassland related to the P acific D ecadal O scillation by Christensen, Erica M., James, Darren K., Randall, Robb M., Bestelmeyer, Brandon T.

“…Abstract Prediction of abrupt ecosystem transitions resulting from climatic change will be an essential element of adaptation strategies in the coming decades…”
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Rapid bulk density measurement using mobile device photogrammetry by Whiting, Michael, Salley, Shawn W., James, Darren K., Karl, Jason W., Brungard, Colby W.

“…Soil bulk density (Db), the ratio of soil solid mass to bulk soil volume, is an important but difficult soil property to measure. Existing methods are either…”
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The effect of small mammal exclusion on grassland recovery from disturbance in the Chihuahuan Desert by Svejcar, Lauren N., Bestelmeyer, Brandon T., James, Darren K., Peters, Debra P.C.

“…In many arid ecosystems, shrub encroachment is coupled to the loss of perennial grasses and associated ecosystem services. Increased native herbivore abundance…”
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Seasonal Divergence of Landscape Use by Heritage and Conventional Cattle on Desert Rangeland by Spiegal, Sheri, Estell, Richard E., Cibils, Andres F., James, Darren K., Peinetti, H. Raul, Browning, Dawn M., Romig, Kirsten B., Gonzalez, Alfredo L., Lyons, Andrew J., Bestelmeyer, Brandon T.

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