US Southwest Research Articles

Dating Perishables to Refine the Chronology of Shrine Cave Use, the Goggle-eye Motif, and other Jornada and Mimbres Mogollon Iconography

Professional and avocational archaeologists have recovered thousands of perishable artifacts from caves and rockshelters across the southern US Southwest, but few have been radiocarbon dated. This article reviews thirty AMS radiocarbon dates obtained on perishable items from nine shrine caves in the Jornada and Mimbres Mogollon regions of south-central New Mexico and west Texas. Dates were obtained from fragments of tablitas, effigies, prayer sticks, projectile point foreshafts, and flat curved sticks. Several convey iconographic elements of the Jornada Style of rock art while others are implements and weapons, but all were deposited in shrine caves. Problems inherent in the dating of shrine cave deposits and perishable artifacts are reviewed and technical matters involving contamination, curation, context, and sample materials are discussed. Analysis reveals several significant trends, one of the most salient being that the Goggle-eye motif, a signature element of Jornada and Mimbres iconography, has greater antiquity than previously assumed.

Exploring Regional Challenges and Solutions to Appropriate and Equitable Care for Patients with Chronic Lymphocytic Leukemia

Background: For patients with chronic lymphocytic leukemia (CLL)-the most common form of leukemia in older adults-equitable access to care is particularly challenging, as the disease is often diagnosed in community cancer centers encumbered by regional disparities. Therefore, identifying and understanding regional barriers to care is essential. In 2020, the Association of Community Cancer Centers (ACCC) developed a heat map detailing the incidence rate of CLL diagnoses across the country (Fig.1), overlayed with the locations of CLL “expert” providers, revealing the areas in the US most in need of additional CLL clinical expertise (Fig. 2). In 2022, these incidence rates were stratified by race, ethnicity, and metropolitan statistical area to identify disparities Building on these maps, ACCC set out to identify specific regional challenges to appropriate, equitable care for patients with CLL. Methods: As part of an independent education program, ACCC initiated conversations with providers about the regional barriers that patients with CLL face. Through 4 webinars in February 2023, participants from 4 regions-Northeast (New York and Maine), Northwest (Montana and Idaho), Midwest (Wisconsin, Illinois, and Iowa), and Southwest (Texas)-shared insights on challenges and exchanged ideas on strategies to improve care for patients with CLL. In addition, ACCC interviewed 3 regionally diverse cancer programs (from the US Northwest, South, and Southwest regions) that are effectively overcoming regional challenges to reach their patient populations and provide equitable care. These interviews highlighted barriers and challenges, showcased effective outreach campaigns, and explored how the outreach improved the patient journey. Findings: The following themes emerged as key challenges and potential solutions throughout all regions studied: (1) Comprehensive Diagnostic Work-up Before Treatment Initiation: A key component in caring for patients with CLL is identifying certain disease related criteria prior to formulating a treatment plan. This includes determining the disease burden, disease-related symptoms, and if the patient meets certain active disease criteria (eg, Binet Stage C or Rai Stage III or IV). Further, by utilizing genetic testing, such as the TP53 gene mutation and IGHV mutation tests, physicians can estimate time to treatment and choice of specific novel targeted therapies. (2) Understanding Patient Population Needs: Cancer programs must understand the needs of their unique patient populations to effectively address them. For example, in the Northwest, as mountainous passes can make travel dangerous at times, one local program utilizes near-campus housing/hotel space for patients for the duration of their intensive treatment. In the Southwest, addressing health insurance coverage, low health literacy, language barriers, patient-provider mistrust, and culturally competent care for undocumented individuals presents challenges to equitable care delivery. Therefore, cancer programs in this region have implemented protocols to utilize community and social services to help support these patients. (3) Developing Community Partnerships: As the median age of diagnosis with CLL is approximately 70 years old, barriers such as transportation availability, caregiver support and financial constraints could be magnified. Building trust, particularly among vulnerable communities, also presents a significant challenge. By partnering with community outreach organizations, programs can help address these issues through community resources such as ride share programs, transportation vouchers, and financial assistance programs. (4) Provider Education and Learning: Because many patients are diagnosed in community cancer programs and smaller practices where physicians do not often have experience with CLL, nationally available provider education on new developments in testing and treatments is key. Conclusions: ACCC identified regional challenges and solutions to appropriate and equitable care for patients with CLL, including the importance of comprehensive diagnostic work-up before treating, understanding the regional needs of patient populations (particularly underserved populations), building community partnerships, and engaging in targeted provider education.

Catholicism as Environmental Protest in Rudolfo Anaya’s Bless Me, Ultima and Ana Castillo’s So Far from God

Abstract The geographical region of the US Southwest now known as New Mexico has been colonized by successive waves of invaders. First, the Spanish arrived carrying with them a militant Catholicism that sought to uproot and replace Native spiritualities. Next, the newly independent Mexican government also used Catholicism as a tool of colonization to counter the threat of Native uprisings and Anglo-American encroachment. Finally, following the Treaty of Guadalupe-Hidalgo in 1848, New Mexico was overrun by Anglo settlers as US policies uprooted Spanish and Mexican landowners from their inherited land grants. While Catholicism remained the dominant religion among the mestiza/o population, Native spiritualities were also able to subvert and influence the direction that this now-distinctive New Mexican Catholicism would take. While scholars have read the decolonial and environmental justice themes at work in these Native spiritualities in both Rudolfo Anaya’s Bless Me, Ultima (1972) and Ana Castillo’s So Far from God (1993), I argue that the Catholic faith of the characters in these novels also plays an important role despite the religion’s use as a tool of colonization in the past. Different from the hybridization process used by the Roman Catholic church to erase/subsume indigenous spiritualities, the iterations of Catholicism in these novels seek a more subtle subversion of the faith’s colonial history. By recognizing the function of guilt within the Catholic church to control behavior, these novels throw this guilt back on the colonizer by redefining the Catholic terminology of sin as harm against people of color and the earth.

Water Use, Growth, and Yield of Ratooned Guayule under Subsurface Drip and Furrow Irrigation in the US Southwest Desert

Guayule (Parthenium argentatum, A. Gray) is a perennial desert shrub with ratoon-cropping potential for multiple harvests of its natural rubber, resin, and bagasse byproducts. However, yield expectations, water use requirements, and irrigation scheduling information for ratooned guayule are extremely limited. The objectives of this study were to evaluate dry biomass (DB), contents of rubber (R) and resin (Re) and yields of rubber (RY) and resin (ReY) responses to irrigation treatments, and develop irrigation management criteria for ratooned guayule. The water productivity (WP) of the yield components were also evaluated. Guayule plants that were direct-seeded in April 2018 were ratooned and regrown starting in April 2020, after an initial 2-year harvest at two locations in Arizona: Maricopa and Eloy on sandy loam and clay soils, respectively. Plots were irrigated with subsurface drip irrigation (SDI) at 50, 75, and 100% replacement of crop evapotranspiration (ETc), respectively, and furrow irrigation at 100% ETc replacement, as determined by soil water balance measurements. The Eloy location did not include the 100% irrigation treatment under SDI due to unsuccessful regrowth for this specific treatment. The irrigation treatments at the locations were replicated three times in a randomized complete block design. After 21–22 months of regrowth, the guayule plants were harvested in plots. The results showed that DB increased with the amount of total water applied (TWA, irrigation plus precipitation), while R and Re were reduced at the highest TWA received at both locations. Ultimately, the SDI treatments with 75% ETc replacement resulted in the best irrigation management in terms of maximizing RY and ReY, and WP for both locations and soil types. Compared to the initial 2-year direct-seeded guayule crop, ratooned guayule required less TWA and attained higher DB, RY, and ReY, as well as higher WP, with average increases of 25% in dry biomass, 33% in rubber yield, and 32% in resin yield. A grower’s costs for planting the initial direct-seeded guayule crop would be offset by the additional yield revenue of the ratooned crop, which would have comparatively small startup costs.

Ocean-forcing of cool season precipitation drives ongoing and future decadal drought in southwestern North America

The US Southwest is in a drought crisis that has been developing over the past two decades, contributing to marked increases in burned forest areas and unprecedented efforts to reduce water consumption. Climate change has contributed to this ongoing decadal drought via warming that has increased evaporative demand and reduced snowpack and streamflows. However, on the supply side, precipitation has been low during the 21st century. Here, using simulations with an atmosphere model forced by imposed sea surface temperatures, we show that the 21st century shift to cooler tropical Pacific sea surface temperatures forced a decline in cool season precipitation that in turn drove a decline in spring to summer soil moisture in the southwest. We then project the near-term future out to 2040, accounting for plausible and realistic natural decadal variability of the Pacific and Atlantic Oceans and radiatively-forced change. The future evolution of decadal variability in the Pacific and Atlantic will strongly influence how wet or dry the southwest is in coming decades as a result of the influence on cool season precipitation. The worst-case scenario involves a continued cold state of the tropical Pacific and the development of a warm state of the Atlantic while the best case scenario would be a transition to a warm state of the tropical Pacific and the development of a cold state of the Atlantic. Radiatively-forced cool season precipitation reduction is strongest if future forced SST change continues the observed pattern of no warming in the equatorial Pacific cold tongue. Although this is a weaker influence on summer soil moisture than natural decadal variability, no combination of natural decadal variability and forced change ensures a return to winter precipitation or summer soil moisture levels as high as those in the final two decades of the 20th century.

Ritual Roadways and Places of Power in the Chaco World (ca. AD 850-1150)

This paper considers the topic of sacred spaces in North America through the vantage offered by Chacoan roads, monumental avenues constructed by Ancestral Four Corners people of the US Southwest from ca. AD 850-1150. I begin with a critique of the concept of the “sacred” as applied to the Chacoan past, suggesting instead that the Indigenous North American concept of power (in the sense of potent, generative force infused throughout the environment) offers a more culturally relevant framing. Next, I present three examples of locations along Chacoan roads that I argue were recognized as places of power due to the inherent landscape affordances of these locales. I close by briefly describing some of the practices carried out along Chacoan roads and drawing a connection between the understanding of “sacredness” evidenced through the archaeology of Chacoan roads and contemporary Native American activist efforts to protect landscapes of great power and meaning.

Assessment of guar gum production cost and environmental impact in the US Southwest

Current drought conditions in the US Southwest, linked to the inherent water resilience qualities of guar and the increased demand for guar gum, can make guar production an attractive option in that region. This study includes new US guar cultivation experimental field data to analyze the economic costs and environmental impacts of growing guar and transforming it into guar gum using comprehensive techno-economic and life cycle assessments. Additionally, an uncertainty analysis was included to better understand the feasibility and risks associated with growing guar in the US Southwest. Results show that the minimum selling price of guar gum is 2.71 $/kg guar gum, with a 90% confidence interval (CI) around the mean ranging from 1.18 to 3.87 $/kg guar gum. Agricultural expenses represent 85% of the costs. Rent payments and irrigation represent the largest contributors to the guar gum minimum selling price. Net greenhouse gas (GHG) emissions are estimated at 1.87 kg CO2/kg gum, with a 90% CI ranging from 0.89 to 2.81 kg CO2/kg guar gum. Irrigation is the main contributor to GHG emissions. The large spread in the results is explained by guar yield being the most important variable to compute minimum selling price and GHG emissions, and by the high variability in guar yields across different sites.

Lidar-Derived Road Profiles: A Case Study Using Chaco Roads from the US Southwest – ERRATUM

Lidar-Derived Road Profiles: A Case Study Using Chaco Roads from the US Southwest – ERRATUM

Wealth inequality in the prehispanic northern US Southwest: from Malthus to Tyche.

Persistent differences in wealth and power among prehispanic Pueblo societies are visible from the late AD 800s through the late 1200s, after which large portions of the northern US Southwest were depopulated. In this paper we measure these differences in wealth using Gini coefficients based on house size, and show that high Ginis (large wealth differences) are positively related to persistence in settlements and inversely related to an annual measure of the size of the unoccupied dry-farming niche. We argue that wealth inequality in this record is due first to processes inherent in village life which have internally different distributions of the most productive maize fields, exacerbated by the dynamics of systems of balanced reciprocity; and second to decreasing ability to escape village life owing to shrinking availability of unoccupied places within the maize dry-farming niche as villages get enmeshed in regional systems of tribute or taxation. We embed this analytical reconstruction in the model of an 'Abrupt imposition of Malthusian equilibrium in a natural-fertility, agrarian society' proposed by Puleston et al. (Puleston C, Tuljapurkar S, Winterhalder B. 2014 PLoS ONE 9, e87541 (doi:10.1371/journal.pone.0087541)), but show that the transition to Malthusian dynamics in this area is not abrupt but extends over centuries This article is part of the theme issue 'Evolutionary ecology of inequality'.

Classroom voices: youth perspectives to direct school-based sexual health education

ABSTRACT Sexual health education is a well-known, evidence-based intervention that can improve adolescent health outcomes, increase protective health behaviours, and decrease risky health behaviours. Providing sexual health education in schools offers opportunities to discuss critical health topics and can improve the school environment. However, not all sexual health education is taught equitably. As part of a mixed-methods study to describe school-based sexual health education, we conducted focus groups and interviews with recent high school graduates in a geographically and ethnically diverse state in the US Southwest. Thirty-one young people shared their experiences, explored the content they had been taught, and offered recommendations to improve sexual health education. Three key themes emerged: young people wanted and needed sexual health education taught in school; current sexual health education is not helpful and sometimes harmful; and the individuals who teach sexual health education are critically important. These findings can help address barriers to school-based sexual health education delivery, particularly for schools within communities with limited resources. The results support including youth as stakeholders in the planning and evaluation of school-based sexual health education, and the development of sexual health education teacher training with the goal of improving youth health outcomes.

Biophysical economic interpretation of the Great Depression: A critical period of an energy transition

AbstractThe objective of this paper is to explain the cause and proceedings of the 1930s Great Depression from a biophysical economic perspective. The Depression was a painful episode in the socio‐technological transition from a coal/railroad regime to one based on hydrocarbons, motor vehicles, and electricity. The beginning—the Great Crash of October 1929—corresponded with drastic cuts in oil prices and announcement of oil supply certainty, following discovery of huge oilfields in the US Southwest. The Depression principally centered on a change from railroads to motor‐vehicle‐based transportation, but was long and drawn‐out due to the hegemonic power that the railroads held over the US economy. The late 1920s saw increased use of hydrocarbon‐based technologies, but the emerging technologies were still reliant on the old technological system. Methods of biophysical economics, mapping energy flows to capital formation, show the critical role of railroads in the Depression. In 1929, railroads accounted for 24% of the non‐residential capital stock; they delivered between 70% and 76% of energy needs; and 69% of energy required for capital formation. Thus a hypothesis emerges that dwindling investment in the railroads was a major constraint on the economy. In biophysical terms, the US economy's main energy delivery system—coal carried by railcars—was hamstrung. Energy flow Sankey diagrams for 1929 and 1939 show the gradual change in energy systems that occurred over the Depression.

The North American Monsoon buffers forests against the ongoing megadrought in the Southwestern United States.

The US Southwest has been entrenched in a two-decade-long megadrought (MD), the most severe since 800 CE, which threatens the long-term vitality and persistence of regional montane forests. Here, we report that in the face of record low winter precipitation and increasing atmospheric aridity, seasonal activity of the North American Monsoon (NAM) climate system brings sufficient precipitation during the height of the summer to alleviate extreme tree water stress. We studied seasonally resolved, tree-ring stable carbon isotope ratios across a 57-year time series (1960-2017) in 17 Ponderosa pine forests distributed across the NAM geographic domain. Our study focused on the isotope dynamics of latewood (LW), which is produced in association with NAM rains. During the MD, populations growing within the core region of the NAM operated at lower intrinsic and higher evaporative water-use efficiencies (WUEi and WUEE , respectively), compared to populations growing in the periphery of the NAM domain, indicating less physiological water stress in those populations with access to NAM moisture. The disparities in water-use efficiencies in periphery populations are due to a higher atmospheric vapor pressure deficit (VPD) and reduced access to summer soil moisture. The buffering advantage of the NAM, however, is weakening. We observed that since the MD, the relationship between WUEi and WUEE in forests within the core NAM domain is shifting toward a drought response similar to forests on the periphery of the NAM. After correcting for past increases in the atmospheric CO2 concentration, we were able to isolate the LW time-series responses to climate alone. This showed that the shift in the relation between WUEi and WUEE was driven by the extreme increases in MD-associated VPD, with little advantageous influence on stomatal conductance from increases in atmospheric CO2 concentration.

Spatial and Discursive Violence in the US Southwest

Spatial and Discursive Violence in the US Southwest

Injuries Sustained With Falls From Height in Crossing the United States-Mexico Border at a Level I Trauma Center: A Prospective Cohort Study.

The US Department of Homeland Security has reported increases in encounters and apprehensions at the US Southwest border for the past several years. The purposes of this study were to assess the demographics, patterns of injuries, and surgical interventions, associated with falls from height along the US-Mexico border. A prospective cohort study was conducted at a Level I trauma center from January 2016 through December 2021 of all patients who fell from height crossing the US-Mexico border and presented with injuries requiring admission. A total of 448 patients were admitted with a median age of 30 years (interquartile range [IQR] 16, range 6 to 65). Monthly frequency of admissions increased markedly with a median of 18.5 (IQR 5.3) in 2021. Patients presented with limited health data, and comorbidities were identified in 111 patients (24.7%). Median height fallen was 5.5 m (18 ft). Patients sustaining a fall from ≥ 5.5 m were markedly more likely to have an Injury Severity Score (ISS) of > 15. Median length of stay was 9 days (IQR 11). There were a total of 1,066 injuries with 723 extremity and pelvic; 236 spine; and 107 head or neck, face, thorax, or abdominal injuries. Median ISS was 9.0 (IQR 7, range 1 to 75, 33% > 15). Tibial plafond fracture and spine injury were markedly associated with longer lengths of stay and ISS > 15. All injuries resulted in 635 separate surgical events and 930 procedures. Clinical follow-up occurred in 55 patients (12.2%), with median duration of 28 days (range 6 days to 8 months). Injuries associated with border crossings and falls from height were serious and increased in frequency. As the US policy on border security evolves, surgeons in these regions should be prepared to handle the associated injuries and sequelae. Prevention of these serious and debilitating injuries should be undertaken to decrease the burden of disease.

Potential of the oothecal parasitoid Aprostocetus hagenowii (Hymenoptera: Eulophidae) as a biological control agent for the Turkestan cockroach (Blattodea: Blattidae).

The Turkestan cockroach, Blatta lateralis (Walker), is a peridomestic pest of growing concern in the US Southwest. The parasitoid Aprostocetus hagenowii (Ratzburg) is used in IPM programs targeting other blattid cockroach species and may aid in B. lateralis suppression. Information about the ability of A. hagenowii to parasitize B. lateralis is lacking. A no-choice host-switching experiment was used to test A. hagenowii acceptance of B. lateralis oothecae, and a multigenerational no-choice experiment was used to determine the suitability of B. lateralis as a host for A. hagenowii over several months of rearing. Periplaneta americana (L.) (Blattodea: Blattidae), the preferred host of A. hagenowii, and Blatta orientalis L., a known host and relative of B. lateralis, were used for comparison. Development time was similar among hosts and generations (P > 0.05). Parasitism success and proportion of female progeny declined significantly with subsequent generations on both Blatta spp. (parasitism success: χ2 = 14.916; df = 2; P = 0.001; proportion female: H = 6.364; df = 2; P = 0.041). These results suggest that A. hagenowii may initially aid in suppression of B. lateralis, but an overall decline in fitness will require repeated releases or provisioning of P. americana oothecae. Development of a strain more suitable for B. lateralis control may be possible via selection from laboratory strains or through use of wild A. hagenowii from areas where B. lateralis is present.

Modeling Earthen Treatments for Climate Change Effects

Adobe has been used globally for millennia. In the US Southwest, cultural heritage sites made of adobe materials have lasted hundreds of years in an arid/semi-arid environment. A common prediction across multiple climate change models, however, is that rainfall intensity will increase in the US Southwest. This increased erosivity threatens the long-term protection and preservation of these sites, and thus resource managers are faced with selecting effective conservation practices. For this reason, modeling tools are needed to predict climate change impacts and plan for adaptation strategies. Many existing strategies, including patching damaged areas, building protective caps and shelter coating walls are already commonly utilized. In this study, we modeled adobe block construction, subjected extant walls to a local 100-year return interval rainfall intensity, and tested earthen-coat-based strategies to minimize the deterioration of earthen fabric. Findings from the resultant linear models indicate that the patching of earthen architecture alone will not prevent substantial damage, while un-amended encapsulation coats and caps provide similar, and significantly greater protection than patching. The use of this model will enable local heritage resource managers to better target preservation methods for a return on investment of the material and labor costs, resulting in better preservation overall and the retention of culturally valuable resources.

Movement or Diaspora? Understanding a Multigenerational Puebloan and Ndee Community on the Central Great Plains

Abstract Many Indigenous groups in North America have long-held practices of using migration and movement in response to environmental and social changes. Diasporic communities, composed of migrants maintaining significant connections to their former homelands, were likely once common in refuge areas of North America, but not always recognized by archaeologists. Many Puebloan peoples in the Northern Rio Grande region of the US Southwest used movement as a way to escape Spanish colonial control after AD 1600, yet retained connections to their homelands. This Puebloan diaspora had far-reaching consequences for Native peoples across the Southwest and neighboring regions like the Great Plains. Here, we briefly summarize how diasporas are defined globally and the ways in which these definitions could shift to help us model diasporas in North America. Using the Pueblo diaspora and a multi-generational Pueblo–Ndee (Apache) community in the Central Great Plains as example, we explore the intricacies of identifying diasporas for North America within the contexts of Indigenous resistance and adaptation.

Spatial and Discursive Violence in the US Southwest. By Rosaura Sánchez and Beatrice Pita.

Spatial and Discursive Violence in the US Southwest. By Rosaura Sánchez and Beatrice Pita.

Indigenous literacies: A look at pedagogies and policy in the Southwest United States

AbstractLiteracy engagement for Indigenous peoples is a practice embedded in lived experience as thoughtful ways to communicate with and make sense of the world around us. Indigenous literacies involve the melding of Indigenous ways of knowing with contemporary educational pedagogies. Indigenous authors and teachers have long used Indigenous pedagogies in their writing and teaching to situate Indigenous identities and knowledge where it has been omitted, to interrogate the systems that appropriate or misarticulate Indigenous knowledge, to actively question spaces where the value and power of Indigenous knowledge is completely disregarded, and to reclaim or create spaces that amplify Indigenous voices and ways of knowing for learners as acts of education sovereignty. This column discusses the concepts of Indigenous literacy, it provides an overview of its practical applications in the US Southwest and the Native American education policies that shape literacy engagement in contemporary learning spaces centering on Indigenous perspectives.

Lidar-Derived Road Profiles

ABSTRACTDespite considerable developments in the archaeological application of lidar for detecting roads, less attention has been given to studying road morphology using lidar. As a result, archaeologists are well equipped to locate but not thoroughly study roads via lidar data. Here, a method that visualizes and statistically compares road profiles using elevation values extracted from lidar-derived digital elevation models is presented and illustrated through a case study on Chaco roads, located in the US Southwest. This method is used to establish the common form of ground-truthed Chaco roads and to measure how frequently this form is across non-ground-truthed roads. This method is an addition to the growing suite of tools for documenting and comparing roads using remotely sensed data, and it can be particularly useful in threatened landscapes where ground truthing is becoming less possible.