Dr. Miguel Villarreal is a Research Geographer with the Western Geographic Science Center at Moffett Field, CA.
Wildfire at the Crossroads

Fire is an essential ecological process and management tool but can also be detrimental to life and property. Our findings provide a new depiction of fire regimes in the Sky Islands that can help inform fire management, restoration and regional conservation planning, fostered by local and traditional knowledge and collaboration among landowners and managers.
Remote Sensing of Biological Soil Crusts

Determining the spatial extent and condition of biocrusts across landscapes continues to present considerable challenges to scientists. Remote sensing offers promising opportunities to detect and characterize biocrust communities, differentiate among biocrust community types, and monitor changes in biocrust distribution across dryland landscapes globally.
Miguel’s research involves using earth observation systems and spatial analyses to better understand how disturbances such as wildfire, invasive species, and energy development affect ecosystems, ecosystem services, and human communities, and to provide land managers information to help reduce risk and facilitate recovery after a disturbance. His geographic focus is on water-limited (dryland) regions of the west, which are particularly sensitive to complex interactions between human land use, natural disturbances, and climate change.
Miguel’s current research projects include studies of wildfire and wildlife in the Sky Island region of the U.S.-Mexico borderlands, monitoring the impacts and recovery of oil and gas and solar energy developments on the Colorado Plateau and Mojave Deserts, and mapping and monitoring biological soil crusts and invasive grasses across the western US. He works closely with federal agency partners (NPS, USFWS, BLM, USFS, DOD) to develop and implement research projects.
Current and recent research projects
- Remote Sensing for Resource Management, Project Chief (2015-Present)
- Southwest Energy Development and Reclamation (SWEDR), Co-Project Chief (2015-Present)
- Biological soil crust ecology and function from space, Co-Project Chief (2020-Present)
- Southern Border Fuels Management Initiative: Strategies to reduce fire risk and improve viewsheds along the U.S. southern border, Co-Investigator (2019-Present)
- Remote Sensing for Monitoring Riverside East Solar Development Focus Area (DFA) and for Desert Energy Transmission Corridors, Principal Investigator (2021-Present)
- Assessing change in forest density and fuel loads in the absence of fire (1941-2018) at Lassen Volcanic NP using historic aerial photos, Principal Investigator (2019-Present)
- Evaluating the response of California Delta riparian ecosystems to anthropogenic and climate stressors, Principal investigator (2019-2021)
- Detection and monitoring of fire-prone early season invasive grasses in the Southwest, Co-investigator (2020-2021)
- Wildfire probability mapping based on regional soil moisture models. Co-investigator, (2020-2022)
- Assessing Vulnerability to Drought in Dryland Ecosystems of the Western U.S. Co-investigator, (2016-2018)
Professional Experience
2011-Present: Research Geographer, U.S. Geological Survey
2011-2013: Mendenhall Fellow, U.S. Geological Survey
2009-2011: Postdoctoral Research Associate, School of Natural Resources and the Environment, University of Arizona
2006-2009: Research Associate, Arizona Remote Sensing Center, University of Arizona
2001- 2005: Research Associate, Geography and Regional Development, University of Arizona
Education and Certifications
Ph.D. and M.A. from the University of Arizona
B.A. from the University of California, Davis
Science and Products
Remote Sensing of Invasive Annual Grasses -- Greater Yellowstone Ecosystem
6th Federal UxS Workshop
Characterizing high-resolution soil burn severity, erosion risk, and recovery using Uncrewed Aerial Systems (UAS)
Assessing Vulnerability of Vegetation and Wildlife Communities to Post-Fire Transformations to Guide Management of Southwestern Pine Forests and Woodlands
Southern Border Fuels Management Initiative
Remote Sensing of Biological Soil Crusts
Soil Compaction and Erosion
Remote Sensing of Invasive Annual Grasses
Remote Sensing of Energy Development
Remote Sensing and Dryland Management
Ecosystem Modelling and Decision Support
Southwest Energy Exploration, Development, and Reclamation (SWEDR)
Datasets of historical aerial photograph orthomosaics of Lassen Volcanic National Park, California (1941, 1952, 1966, 1973, 1998 and 2004)
Spatial data of California riparian vegetation productivity trends over time (2000-2020) and environmental covariates
Geodatabase of oil and gas pads and roads within the Bureau of Land Management's Carlsbad Field Office administrative boundary, New Mexico
Maps of early season invasive grasses and hot spots in the Mojave Ecoregion from 2009-2020
Maps of cumulative energy expenditure models for jaguar in southern Arizona
Maps of mule deer avoidance areas based on density of oil and gas developments, Book Cliffs, Utah
Annual (1986-2020) land-use/land cover maps of the Santa Cruz Watershed and Tucson metropolitan area, Arizona
Predicted biomass of fine fuel for Altar Valley, Arizona, 2021
Pine species distribution maps of the Madrean Sky Islands, United States and Mexico
Burn probability models calibrated using past human and lightning ignition patterns in the Madrean Sky Islands, Arizona
Mapped fire perimeters from the Sky Island Mountains of US and Mexico: 1985-2017
Differenced Normalized Burn Ratio (dNBR) data of wildfires in the Sky Island Mountains of the southwestern US and northern Mexico from 2011-2017
Time, climate, and soil settings set the course for reclamation outcomes following dryland energy development
Resilience of riparian vegetation productivity to early 21st century drought in northern California, USA
Biophysical factors control invasive annual grass hot spots in the Mojave Desert
Connecting dryland fine-fuel assessments to wildfire exposure and natural resource values at risk
Spatial models of jaguar energy expenditure in response to border wall construction and remediation
Conflict of energies: Spatially modeling mule deer caloric expenditure in response to oil and gas development
The North American tree-ring fire-scar network
Climate refugia for Pinus spp. in topographic and bioclimatic environments of the Madrean sky islands of México and the United States
Wildfire probability models calibrated using past human and lightning ignition patterns can inform mitigation of post-fire hydrologic hazards
A shared vision for enhancing ecological resilience in the U.S. - Mexico borderlands: The Sky Island Restoration Collaborative
Remotely sensed fine-fuel changes from wildfire and prescribed fire in a semi-arid grassland
Global application of an unoccupied aerial vehicle photogrammetry protocol for predicting aboveground biomass in non-forest ecosystems
Science and Products
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Filter Total Items: 14
Remote Sensing of Invasive Annual Grasses -- Greater Yellowstone Ecosystem
Exotic annual grasses such as cheatgrass (Bromus tectorum) have heavily invaded portions of the western United States, rapidly degrading habitats and increasing wildfire risk. Cheatgrass and other ESIs (desert alyssum [Alyssum desertorum], and annual wheatgrass [Eremopyrum triticeum]) are an emerging threat to the Greater Yellowstone Ecosystem (GYE); climatic changes including earlier snowmelt/run...6th Federal UxS Workshop
6th Federal UxS Workshop SAVE THE DATE! September 10-12, 2024 Southwestern Indian Polytechnic Institute Albuquerque, NMCharacterizing high-resolution soil burn severity, erosion risk, and recovery using Uncrewed Aerial Systems (UAS)
The western United States is experiencing severe wildfires whose observed impacts, including post-wildfire floods and debris flows, appear to be increasing over time.Assessing Vulnerability of Vegetation and Wildlife Communities to Post-Fire Transformations to Guide Management of Southwestern Pine Forests and Woodlands
Wildfire is a natural and essential process in forest ecosystems, but characteristics of fire regimes that have shaped these landscapes over long time scales are changing with climate change and human activities. In some places, changes in fire size, frequency, and severity threaten to degrade essential ecosystem services that produce clean air and water, fertile soil for crop and wood production,Southern Border Fuels Management Initiative
The Southern Border Fuels Management Initiative was initiated in 2017 to reduce wildfire risk and improve border security by actively conducting fuels treatments on Department of Interior (DOI) and tribal lands within 100 miles of the US-Mexico border. The initiative supports Executive Order 13855: Promoting Active Management of America’s Forests, Rangelands, and Other Federal Land to Improve...Remote Sensing of Biological Soil Crusts
Biological soil crusts (biocrusts, photoautotrophic soil surface communities comprised of cyanobacteria, algae, bryophytes, lichens, and fungi) occur in drylands globally where they contribute to ecosystem functioning by increasing soil stability, reducing dust emissions, and modifying soil resource availability (e.g., water, nutrients) (Fig 1.3.1). Despite increasing recognition and interest in...Soil Compaction and Erosion
Extensive off-highway vehicle (OHV) use on desert lands can directly and indirectly lead to human health problems and impact soil, vegetation, and wildlife habitat. Soil pulverization and loosening caused by OHVs contribute to dust hazards, and to respiratory illnesses and diseases (e.g., valley fever) in adjacent, downwind communities. Repeated soil compaction by OHVs can also degrade natural...Remote Sensing of Invasive Annual Grasses
One of the major ecological consequences of increasing global connectivity is the introduction, establishment, and spread of non-native species into new ecosystems. The rate and extent of biological invasions continues to increase globally, often at considerable environmental and economic costs. Once established, non-native species can transform ecosystems, complicating land management decision...Remote Sensing of Energy Development
Oil and gas development across the western United States has increased substantially in recent decades, including within the Colorado Plateau. The Colorado Plateau is a high desert region of grasslands, shrublands, and woodlands and is home to a large number of world-renowned national and tribal parks and monuments (e.g., Grand Canyon, Zion, Bryce, Arches, Canyonlands, Monument Valley, and Mesa...Remote Sensing and Dryland Management
Drylands (areas characterized by low precipitation, high evapotranspiration, and low soil moisture) occupy around 40-45% of the earth’s surface. Many drylands contain high biodiversity and provide essential ecosystem services (e.g., livestock forage, agricultural production, pollination) for nearly 1/3 of the world’s population who live in drylands. Given limited precipitation and other resources...Ecosystem Modelling and Decision Support
The Ecosystem Modelling and Decision Support Project seeks to understand how drivers of ecosystem change like wildfire, drought, and land use affected past spatial and temporal patterns of vegetation communities and wildlife. Research methods involve 1) analyzing field-collected information (e.g. long-term plot/transect data, repeat photography) on soils, vegetation, and/or wildlife with...Southwest Energy Exploration, Development, and Reclamation (SWEDR)
Approximately 35% of the US and approximately 82% of DOI lands are “drylands” found throughout the western US. These lands contain oil, gas, oil shale, shale oil, and tar sand deposits and the exploration for and extraction of these resources has resulted in hundreds of thousands of operating and abandoned wells across the West. These arid and semi-arid lands have unique soil and plant communities... - Data
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Datasets of historical aerial photograph orthomosaics of Lassen Volcanic National Park, California (1941, 1952, 1966, 1973, 1998 and 2004)
This data release publishes datasets of historical aerial photograph orthomosaics covering areas within and surrounding Lassen Volcanic National Park, California. The historical imagery provides a high-resolution, spatially contiguous record of the park’s landscape across six dates ranging from 1941-2004. A total of 990 hard-copy aerial photographs taken in 1941, 1952, 1966, 1973, 1998, and 2004 wSpatial data of California riparian vegetation productivity trends over time (2000-2020) and environmental covariates
This data release contains a shapefile of riparian vegetation communities attributed with information on trends in satellite-estimates of vegetation productivity for the period from 2000-2020. Cloud-masked Landsat data were processed from 2000 to 2020 to generate a 21-year growing season (June, July, and August) time series combining data from Landsat 5 (2000-2011), Landsat 7 (2012), and Landsat 8Geodatabase of oil and gas pads and roads within the Bureau of Land Management's Carlsbad Field Office administrative boundary, New Mexico
This database contains spatial data on the location, number, size and extent of energy-related surface disturbances within the Bureau of Land Management’s (BLM) Carlsbad Field Office (CFO) administrative area. The BLM administers over 2 million acres of surface estate and 3 million acres of mineral estate in the southeastern portion of New Mexico. The BLM requires a thorough and comprehensive reasMaps of early season invasive grasses and hot spots in the Mojave Ecoregion from 2009-2020
Maps of invasive annual grasses were created using multi-season Landsat imagery over a 12 years period (2009-2020), and validated using an extensive network of plot data. Annual maps were used to identify persistent and productive populations of invasive annual grass, called hot spots, across entire Mojave Desert ecoregion. The data provided include a 12 band raster geospatial data file (.tiff) thMaps of cumulative energy expenditure models for jaguar in southern Arizona
Raster data depicting estimated jaguar energy expenditure required to move north from the US-Mexico border to reach important water sources. The data were generated for five scenarios: walled, un-walled crossing and three remediation scenarios: a border crossing through the wall in rugged terrain towards the west end of the wall, a crossing in a dry wash centrally located, one in less rugged terraMaps of mule deer avoidance areas based on density of oil and gas developments, Book Cliffs, Utah
Vector data showing areas of dense oil and gas development that mule deer are expected to avoid, for twelve study sites in the Book Cliffs region in Utah.Annual (1986-2020) land-use/land cover maps of the Santa Cruz Watershed and Tucson metropolitan area, Arizona
Annual (1986-2020) land-use/land cover maps at 30-meter resolution of the Tucson metropolitan area, Arizona and the greater Santa Cruz Watershed including Nogales, Sonora, Mexico. Maps were created using a combination of Landsat imagery, derived transformation and indices, texture analysis and other ancillary data fed to a Random Forest classifier in Google Earth Engine. The maps contain 13 classePredicted biomass of fine fuel for Altar Valley, Arizona, 2021
These data were compiled for the Altar Valley Conservation Alliance and the U. S. Fish and Wildlife Service to identify and quantify the spatial distribution of fine fuels in relation to wildfire management across jurisdictional boundaries. Objective(s) of our study were to map the 2021 annual distribution of the biomass (kg/ha) of fine fuels (grasses, shrubs, and forbs) for the whole of the AltarPine species distribution maps of the Madrean Sky Islands, United States and Mexico
This dataset includes raster species distribution models of five pine species in the Madrean sky islands of Mexico and the United States. Models were trained using a large bi-national field dataset (n = 1,416) of pine species observations. Species distribution models were created for the following pine species: P. arizonica (syn. P. ponderosa var. arizonica); P. discolor (syn. P. cembroides var. bBurn probability models calibrated using past human and lightning ignition patterns in the Madrean Sky Islands, Arizona
Burn probability (BP) models involve the simulation of multiple individual wildfires across a landscape to obtain estimates of fire likelihood at any given location based on ignition source, local terrain, fuels and weather. We used FlamMap software to generate BP for 10,000 simulated fires under the three ignition scenarios: human ignition scenario (HIS), lightning ignition scenario (LIS) and ranMapped fire perimeters from the Sky Island Mountains of US and Mexico: 1985-2017
Polygon locations of fire perimeters in the Sky Island mountain ranges in the Madrean Archipelago Ecoregion of the southwestern United States and northern Mexico. These fires occurred from 1985 to 2017 and were mapped using Landsat satellite imagery.Differenced Normalized Burn Ratio (dNBR) data of wildfires in the Sky Island Mountains of the southwestern US and northern Mexico from 2011-2017
This dataset is composed of 97 Differenced Normalized Burn Ratio (dNBR) images. Each dNBR represents a rough measure of fire-related vegetation change for wildfires (>400 ha) that occurred in the Sky Island Mountains within the Madrean Archipelago Ecoregion of the United States and Northern Mexico. These fires occurred between 2011 and 2017 and were mapped using Landsat 7 and 8 satellite imagery. - Multimedia
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Filter Total Items: 41
Time, climate, and soil settings set the course for reclamation outcomes following dryland energy development
Soil attributes, climate, and time since reclamation have important implications for oil and gas reclamation success on drylands. It is uncertain if reclaimed well pads, on highly degraded drylands, can successfully regain ecological function or meet indicator benchmarks for reclamation. Here, our goals were to assess patterns in reclamation outcomes relative to (1) soil attributes, climate, and tAuthorsRandi Corrine Lupardus, Aarin Sengsirirak, Keven Griffen, Anna C Knight, Brandon E McNellis, John B. Bradford, Seth M. Munson, Sasha C. Reed, Miguel L. Villarreal, Michael C. DuniwayResilience of riparian vegetation productivity to early 21st century drought in northern California, USA
Drought and intensive land use can interact as stressors on riparian vegetation, especially along rivers flowing through seasonally dry landscapes. Knowledge of past riparian vegetation response to drought and land use change can provide land managers with a better understanding of changes induced by upstream management actions, climate change, and chronic stressors. To investigate the response ofAuthorsPaul Selmants, Caroline Rose Conrad, Tamara S. Wilson, Miguel L. VillarrealBiophysical factors control invasive annual grass hot spots in the Mojave Desert
Invasive annual grasses can promote ecosystem state changes and habitat loss in the American Southwest. Non-native annual grasses such as Bromus spp. and Schismus spp. have invaded the Mojave Desert and degraded habitat through increased fire occurrence, severity, and shifting plant community composition. Thus, it is important to identify and characterize the areas where persistent invasion has ocAuthorsTanner Corless Smith, Tara B.B. Bishop, Michael C. Duniway, Miguel L. Villarreal, Anna C Knight, Seth M. Munson, Eric K. Waller, Ryan Jensen, Richard A. GillConnecting dryland fine-fuel assessments to wildfire exposure and natural resource values at risk
BackgroundWildland fire in arid and semi-arid (dryland) regions can intensify when climatic, biophysical, and land-use factors increase fuel load and continuity. To inform wildland fire management under these conditions, we developed high-resolution (10-m) estimates of fine fuel across the Altar Valley in southern Arizona, USA, which spans dryland, grass-dominated ecosystems that are administeredAuthorsAdam Gerhard Wells, Seth M. Munson, Miguel L. Villarreal, Steven E. Sesnie, Katherine M. LaushmanSpatial models of jaguar energy expenditure in response to border wall construction and remediation
The construction of a wall at the United States-Mexico border is known to impede and deter movement of terrestrial wildlife between the two countries. One such species is the jaguar, in its northernmost range in the borderlands of Arizona and Sonora. We developed an anisotropic cost distance model for jaguar in a binational crossing area of the Madrean Sky Islands at the United States-Mexico bordeAuthorsSamuel Norton Chambers, Miguel L. Villarreal, Laura M. Norman, Juan Carlos Bravo, Myles B. TraphagenConflict of energies: Spatially modeling mule deer caloric expenditure in response to oil and gas development
ContextWildlife avoid human disturbances, including roads and development. Avoidance and displacement of wildlife into less suitable habitat due to human development can affect their energy expenditures and fitness. The heart rate and oxygen uptake of large mammals varies with both natural aspects of their habitat (terrain, climate, predators, etc.) and anthropogenic influence (noise, light, fragmAuthorsSamuel Norton Chambers, Miguel L. Villarreal, Olivia Jane Marie Duane, Seth M. Munson, Erica Francis Stuber, Gayle L Tyree, Eric K Waller, Michael C. DuniwayThe North American tree-ring fire-scar network
Fire regimes in North American forests are diverse and modern fire records are often too short to capture important patterns, trends, feedbacks, and drivers of variability. Tree-ring fire scars provide valuable perspectives on fire regimes, including centuries-long records of fire year, season, frequency, severity, and size. Here, we introduce the newly compiled North American tree-ring fire-scarAuthorsEllis Margolis, Christopher H. Guiterman, Raphael Chavardès, Jonathan D. Coop, Kelsey Copes-Gerbitz, Denyse A. Dawe, Donald A. Falk, James D. Johnston, Evan Larson, Hangkyo Lim, Joseph M. Marschall, Cameron E. Naficy, Adam T. Naito, Marc-André Parisien, Sean A. Parks, Jeanne Portier, Helen M. Poulos, Kevin M. Robertson, James H. Speer, Michael C. Stambaugh, Thomas W. Swetnam, Alan J. Tepley, Ichchha Thapa, Craig D. Allen, Yves Bergeron, Lori D. Daniels, Peter Z. Fulé, David Gervais, Martin P. Girardin, Grant L. Harley, Jill E. Harvey, Kira M. Hoffman, Jean M. Huffman, Matthew D. Hurteau, Lane B. Johnson, Charles W. Lafon, Manuel K. Lopez, R. Stockton Maxwell, Jed Meunier, Malcolm North, Monica T. Rother, Micah R. Schmidt, Rosemary L. Sherriff, Lauren A. Stachowiak, Alan H. Taylor, Erana J. Taylor, Valerie Trouet, Miguel L. Villarreal, Larissa L. Yocom, Karen B. Arabas, Alexis H. Arizpe, Dominique Arseneault, Alicia Azpeleta Tarancón, Christopher H. Baisan, Erica Bigio, Franco Biondi, Gabriel D. Cahalan, Anthony C. Caprio, Julián Cerano-Paredes, Brandon M. Collins, Daniel C. Dey, Igor Drobyshev, Calvin A. Farris, M. Adele Fenwick, William T. Flatley, M. Lisa Floyd, Ze'ev Gedalof, Andres Holz, Lauren F. Howard, David W. Huffman, Jose Iniguez, Kurt F. Kipfmueller, Stanley G Kitchen, Keith Lombardo, Donald McKenzie, Andrew G. Merschel, Kerry L. Metlen, Jesse Minor, Christopher D. O'Connor, Laura Platt, William J. Platt, Thomas Saladyga, Amanda B. Stan, Scott L. Stephens, Colleen Sutheimer, Ramzi Touchan, Peter J. WeisbergClimate refugia for Pinus spp. in topographic and bioclimatic environments of the Madrean sky islands of México and the United States
Climate refugia, or places where habitats are expected to remain relatively buffered from regional climate extremes, provide an important focus for science and conservation planning. Within high-priority, multi-jurisdictional landscapes like the Madrean sky islands of the United States and México, efforts to identify and manage climate refugia are hindered by the lack of high-quality and consistenAuthorsSandra L. Haire, Miguel L. Villarreal, Citlali Cortés Montaño, Aaron D. Flesch, José M. Iniguez, Jose Raul Romo-Leon, Jamie S. SanderlinWildfire probability models calibrated using past human and lightning ignition patterns can inform mitigation of post-fire hydrologic hazards
Most wildfires are started by humans, however, geographic variation of potential ignition sources is not often explicitly accounted for in wildfire simulation modelling or risk assessments. In this study, we investigated how patterns of human and lightning ignitions can influence modelled fire simulations and demonstrate how these data can be used to assess post-fire flooding and sediment transporAuthorsMiguel L. Villarreal, Laura M. Norman, Erika Yao, Caroline Rose ConradA shared vision for enhancing ecological resilience in the U.S. - Mexico borderlands: The Sky Island Restoration Collaborative
No abstract available.AuthorsLaura M. Norman, Michele Girard, H. Ron Pulliam, Miguel L. Villarreal, Valer Austin Clark, Aaron D. Flesch, Roy Petrakis, Jeremiah Leibowitz, Deborah Tosline, Kurt Vaughn, Tess Wagner, Caleb Weaver, Trevor Hare, Jose Manuel Perez, Oscar E. Lopez Bujanda, Josiah T. Austin, Carianne Funicelli Campbell, James B. Callegary, Natalie R. Wilson, Jeff Conn, Tom Sisk, Gary L. NabhanRemotely sensed fine-fuel changes from wildfire and prescribed fire in a semi-arid grassland
The spread of flammable invasive grasses, woody plant encroachment, and enhanced aridity have interacted in many grasslands globally to increase wildfire activity and risk to valued assets. Annual variation in the abundance and distribution of fine-fuel present challenges to land managers implementing prescribed burns and mitigating wildfire, although methods to produce high-resolution fuel estimaAuthorsAdam Gerhard Wells, Seth M. Munson, Steven E Sesnie, Miguel L. VillarrealGlobal application of an unoccupied aerial vehicle photogrammetry protocol for predicting aboveground biomass in non-forest ecosystems
Non-forest ecosystems, dominated by shrubs, grasses and herbaceous plants, provide ecosystem services including carbon sequestration and forage for grazing, and are highly sensitive to climatic changes. Yet these ecosystems are poorly represented in remotely sensed biomass products and are undersampled by in situ monitoring. Current global change threats emphasize the need for new tools to captureAuthorsAndrew Cunliffe, Karen Anderson, Fabio Boschetti, Richard E. Brazier, Hugh A. Graham, Isla H. Myers-Smith, Thomas Astor, Matthias M. Boer, Leonor G. Calvo, Patrick Clark, Michael D. Cramer, Miguel S. Encinas-Lara, Stephen M. Escarzaga, Adrian Fisher, José M Fernández-Guisuraga, Kateřina Gdulová, Breahna M. Gillespie, Anne Griebel, Niall P Hanan, Muhammed S. Hanggito, Stefan Haselberger, Caroline A. Havrilla, Phil Heilman, Wenjie Ji, Jason W. Karl, Sabine Kraushaar, Marguerite E. Mauritz, Mitchell Lyons, Irene Marzolff, C. D. McIntire, Daniel Metzen, Luis A. Mendez-Barroso, Simon C. Power, Jiri Prosek, Enoc Sanz-Ablanedo, Katherine J. Sauer, Damian Schulze-Brüninghoff, Petra Šímová, Stephen Sitch, Julian L. Smit, Caiti M. Steele, Susana Suárez-Seoane, Sergio A. Vargas, Fleur Visser, Miguel L. Villarreal, Michael Wachendorf, Hannes Wirnsberger, Robert Wojcikiewicz - News