Geography Commons^™

Collaborative Governance And Hydrosocial Territorialization: Reaching Consensus On Salmon Restoration Goals In The Columbia River Basin, Thien-Kim Bui, Rebecca Mclain

Geography Faculty Publications and Presentations

Across the Cascadia bioregion, salmon and steelhead are ecological and cultural keystone species that contribute to and illustrate riverine health. Due to complex social, economic, and ecological relations over the past 150 years, many Columbia River Basin salmon and steelhead populations are now listed as threatened or endangered in the United States. This research uses the 2017–2020 Columbia Basin Partnership Task Force as a case study to understand how this collaborative governance effort of sovereign entities and nonsovereign stakeholders navigated competing water claims to reach consensus on aspirational qualitative and quantitative goals for salmon and steelhead restoration. Using semistructured interviews …

Scale-Dependent Effects Of Urban Canopy Cover, Canopy Volume, And Impervious Surfaces On Near-Surface Air Temperature In A Mid-Sized City, Carson Ralls, Anne Y. Polyakov, Vivek Shandas

Geography Faculty Publications and Presentations

Cities are significantly warmer than their surrounding rural environments. Known as the ‘urban heat island effect’, it can affect the health of urban residents and lead to increased energy use, public health impacts, and damage to infrastructure. Although this effect is extensively researched, less is known about how landscape characteristics within cities affect local temperature variation. This study examined how tree canopy cover, canopy volume, and impervious surface cover affect daytime near-surface air temperature, and how these effects vary between different scales of analysis (10, 30, 60, 90 m radii), ranging from approximate street corridor to city block size. Temperature …

Foreign Funding Of U.S. Higher Education Relates To Sanctioning Of Scholars And Antisemitism, Michael Bass, Alexander Reid Ross, Ben Wolfson, Joel Finkelstein, Sonia Yanovsky, Danit Finkelstein, Sean T. Stevens, Nathan Honeycutt, Pamela Paresky, Ayal Feinberg, Multiple Additional Authors

Geography Faculty Publications and Presentations

We examined relations between foreign funding of U.S. colleges and universities and campus political developments. Seven studies investigated associations between foreign funding and campus liberal democratic norms, specifically, deterioration of free speech and academic freedom, and presence of antisemitism. Study I found that 349 colleges and universities received a total of almost $18 billion from foreign sources between 2014 and 2019. Study II examined relationships of foreign funding to campus deplatforming of speakers and punitive actions for speech protected by academic freedom. Main results were: 1. overall foreign funding was not strongly related to campus speech outcomes; 2. higher levels …

Impacts Of A Short-Interval Severe Fire On Forest Structure And Regeneration In A Temperate Andean Araucaria-Nothofagus Forest, Paola Arroyo-Vargas, Sebastian Busby, Thomas T. Veblen, Mauro E. Gonzalez, Andres Holz

Geography Faculty Publications and Presentations

Background:

Warmer climate conditions are altering fire regimes globally, eroding the capacity of forest ecosystems to resist and recover from natural disturbances like wildfire. Severe and rapidly repeated wildfires are promoting tree regeneration failure of obligate-seeders and/or fire-sensitive species in temperate forests of the Southern Hemisphere. We collected post-fire field data to evaluate whether forest structure and tree regeneration responses varied between two Andean forest study areas dominated by the threatened Gondwanan conifer Araucaria araucana and Nothofagus species (southern beeches) — one area burned once, the other reburned after 13 years.

Results:

Tree mortality was high across species after a …

The Water-Climate Nexus: Intersections Across Sectors, Thushara Gunda, Alida A. Cantor, Emily Grubert, Angela R. Harris, Yolanda J. Mcdonald

Geography Faculty Publications and Presentations

Water security and climate change are important priorities for communities and regions worldwide. The intersections between water and climate change extend across many environmental and human activities. This Primer is intended as an introduction, grounded in examples, for students and others considering the interactions between climate, water, and society. In this Primer, we summarize key intersections between water and climate across four sectors: environment; drinking water, sanitation, and hygiene; food and agriculture; and energy. We begin with an overview of the fundamental water dynamics within each of these four sectors, and then discuss how climate change is impacting water and …

Exploration Of Large-Scale Vegetation Transition In Wet Ecosystems: A Comparison Of Conifer Seedling Abundance Across Burned Vs. Unburned Forest-Peatland Ecotones In Western Patagonia, Kyla Zaret, Andres Holz

Geography Faculty Publications and Presentations

Altered fire regimes, combined with a warmer and drier climate, have been eroding the resilience of temperate rainforests and peatlands worldwide and leading to alternative post-fire vegetation communities. Chronic anthropogenic burning of temperate rainforests at the forest-peatland ecotone in western Patagonia appears to have shifted vegetation communities in poorly-drained sites from forests dominated by the threatened conifer, Pilgerodendron uviferum, to peat-accumulating wetlands covered by Sphagnum mosses. We collected and modeled post-reburn field data using ordinations and hierarchical Bayesian regressions to examine mechanisms through which P. uviferum forests may recover following fire or become locked into alternative development pathways by comparing …

Water Throughout The Green Energy Transition: Hydrosocial Dimensions Of Coal, Natural Gas, And Lithium, Joshua J. Cousins, Alida Cantor, Bethani Turley

Geography Faculty Publications and Presentations

Energy transitions are reshaping hydrosocial relations. How they will be reshaped, however, depends on location and water's material relationship to other resources and industrial activities embedded within energy transitions. To highlight this, we focus on three different resources—coal, natural gas, and lithium—to signal how the water–energy nexus will be reworked in a transition away from fossil fuels. We examine the water–coal nexus as an example of a resource relationship that is transitioning out, or that is being moved away from in the green energy transition. Natural gas represents the “bridge fuel” used through the transition. Lithium illustrates a resource inside …

Working (Around/Within/Against) Prior Appropriation: Diverse Hydrosocial Practices To Secure Water For Rivers, Alida Cantor, Jillian Farley, Thien-Kim Bui, Zachary Boyce

Geography Faculty Publications and Presentations

Water scarcity in the Western US, through the lens of political ecology, can be understood as inextricably shaped by power dynamics, governance structures, and legal practices of resource allocation. Water allocation in the region is determined largely by the legal doctrine of Prior Appropriation, the 'first in time, first in right' principle. However, prior appropriation is fundamentally based in anthropocentric and settler colonial assumptions, and in light of drought, climate change, and shifting social and environmental values, the system has been critiqued as inadequate to meet contemporary water challenges. Despite challenging historical legacies, water managers in the Western US are …

Lithium And Water: Hydrosocial Impacts Across The Life Cycle Of Energy Storage, James J. A. Blair, Noel Vineyard, Dustin Mulvaney, Alida Cantor, Ali Sharbat, Kate Berry, Elizabeth Bartholomew, Ariana Firebaugh Ornelas

Geography Faculty Publications and Presentations

As a key ingredient of batteries for electric vehicles (EVs), lithium plays a significant role in climate change mitigation, but lithium has considerable impacts on water and society across its life cycle. Upstream extraction methods—including open-pit mining, brine evaporation, and novel direct lithium extraction (DLE)—and downstream processes present different impacts on both the quantity and quality of water resources, leading to water depletion and contamination. Regarding upstream extraction, it is critical for a comprehensive assessment of lithium's life cycle to include cumulative impacts related not only to freshwater, but also mineralized or saline groundwater, also known as brine. Legal frameworks …

Participatory Mapping Of Tree Equity, Preferences, And Environmental Justice In Portland, Oregon, Kate Gregory, Idowu Ajibade

Geography Faculty Publications and Presentations

In this study, we examine community lived experiences, preferences, and narratives about tree equity in Portland, Oregon. Using an environmental justice framework combined with participatory mapping, focus group discussions, and semi-structured interviews, we examine values, perceptions of canopy cover, and everyday relationships with trees across different racial and socio-economic backgrounds. Results show that participants from neighborhoods with histories of investment and privilege had different lived experiences compared to those with histories of disinvestment and marginalization. While participants overall valued trees, concerns about tree-related risk and safety varied in ways that reflected racial and class identities. Furthermore, memories and historic knowledge …

Estimating Combined Effects Of Climate Change And Land Cover Change On Water Regulation Services Of Urban Wetlands In Valdivia, Chile, Jason Sauer, N. B. Grimm, Olga Barbosa, Elizabeth M. Cook, A. Mustafa, K. Kunkel, T. Mcphearson, A. Ballinger

Geography Faculty Publications and Presentations

The relationship between cities and wetland cover varies across the globe, with some cities converting wetlands to low‐ and high‐density urban cover and others preserving, conserving, or restoring wetlands, or constructing new ones. However, the scientific literature lacks studies relating changes in systemic flood risk in an urban stormwater management systems to changes in wetland cover. Furthermore, whether and how such relationships are affected by changing storm intensity under climate change is unknown. We present a case study on the effects of changes in urban wetland extent and storm intensity on flooding in an urban drainage system in Valdivia, Chile, …

Women And Water: An Art-Based Academic-Community Partnership, Martina Angela Caretta, Bethani Turley

Geography Faculty Publications and Presentations

Women constitute most volunteer water stewards in West Virginia. After having conducted participatory research on the motivations behind women’s engagement with water preservation and restoration work we carried out two participatory art-based activities. In this Practices and Curations, we reflect on these two art-based activities to facilitate networking between researchers and participants and to communicate to the wider public the role of women water stewards. Together with community partners we first organized an icebreaker for women to share a boundary object that signified their connection with water. These boundary objects were subsequently displayed in an art exhibit highlighting women’s connection …

Spatiotemporal Analysis Of Soil Quality Degradation And Emissions In The State Of Iowa (Usa), Elena A. Mikhailova, Hamdi A. Zurqani, Lili Lin, Zhenbang Hao, Christopher J. Post, Mark A. Schlautman, Gregory C. Post

Geography Faculty Publications and Presentations

The concept of soil quality (SQ) is defined as the soil's capacity to function, which is commonly assessed at the field scale. Soil quality is composed of inherent (soil suitability) and dynamic (soil health, SH) SQ, which can also be analyzed using geospatial tools as a SQ continuum (SQC). This study proposes an innovative spatiotemporal analysis of SQ degradation and emissions from land developments using the state of Iowa (IA) in the United States of America (USA) as a case study. The SQ degradation was linked to anthropogenic soil (SD) and land degradation (LD) in the state. More than 88% …

Patterns, Drivers, And Implications Of Postfire Delayed Tree Mortality In Temperate Conifer Forests Of The Western United States, Sebastian Busby, Cody Evers, Andrés Holz

Geography Faculty Publications and Presentations

Conifer forest resilience may be threatened by increasing wildfire activity and compound disturbances in western North America. Fire refugia enhance forest resilience, yet may decline over time due to delayed mortality—a process that remains poorly understood at landscape and regional scales. To address this uncertainty, we used high-resolution satellite imagery (5-m pixel) to map and quantify delayed mortality of conifer tree cover between 1 and 5 years postfire, across 30 large wildfires that burned within three montane ecoregions in the western United States. We used statistical models to explore the influence of burn severity, topography, soils, and climate moisture deficit …

The Complexities Of Irrigation Efficiency: Groundwater Data, Agro-Hydrology, And Water Decision-Making In Central Oregon, Rebecca Anderson, Alida Cantor

Geography Faculty Publications and Presentations

Irrigation efficiency projects aim to conserve water for in-stream flow and agricultural use by reducing water losses throughout the system. Piping irrigation canals is a common irrigation efficiency method that results in trade-offs: while it increases efficiency of irrigation water conveyance, it reduces incidental groundwater recharge. This paper focuses on the data and decision-making of canal piping, focusing primarily on understanding the potential impacts of reduced canal leakage on shallow wells. By conducting a spatial analysis of shallow wells in the basin at risk of being impacted by canal piping, and combining this with interviews with water managers in central …

Does El Niño Affect Mjo-Ar Connections Over The North Pacific And Associated North American Precipitation?, Laís G. Fernandes, Paul Loikith

Geography Faculty Publications and Presentations

This study investigates how the El Niño phase (EN) of the El Niño-Southern Oscillation (ENSO) influences the Madden-Julian Oscillation (MJO) modulation of cool-season North Pacific atmospheric rivers (ARs) and associated AR-landfall North American precipitation between 1980 and 2020. EN changes the key drivers of MJO-AR connections by shifting MJO-driven convection east of 180° in MJO phases 6–8 and extending the northern Pacific subtropical jet eastward. Under these conditions, the MJO tropical-extratropical teleconnection is triggered east of 180° in phases 7–8, and a persistent cyclonic flow anomaly develops along the United States west coast. Anomalous northeastward integrated water vapor transport (IVT) …

Drivers Of Tree Canopy Loss In A Mid-Sized Growing City: Case Study In Portland, Or (Usa), Yunjae Ock, Vivek Shandas, Fernanda Ribeiro, Noah Young

Geography Faculty Publications and Presentations

The benefits of the urban tree and tree canopy (UTC) are increasingly crucial in addressing urban sustainability. Yet, increasingly evident from earlier research is the distributional inequities of UTC and active efforts to expand tree plantings. Less is known about the dynamics of UTC loss over time and location. This study aims to understand the dynamics of UTC change, especially canopy loss, and to investigate the drivers of the loss. This study draws on a high–resolution dataset of an urban canopy in Portland, Oregon, USA, assessing changes in UTC from 2014 to 2020. By integrating demographic, biophysical, and policy data …

The Meteorology And Impacts Of The September 2020 Western United States Extreme Weather Event, Emma N. Russell, Paul Loikith, Idowu Ajibade, James Done, Chris Lower

Geography Faculty Publications and Presentations

In September 2020, Western North America was impacted by a highly anomalous meteorological event. Over the Pacific Northwest, strong and dry easterly winds exceeded historically observed values for the time of year and contributed to the rapid spread of several large wildfires. Nine lives were lost and over 5000 homes and businesses were destroyed in Oregon. The smoke from the fires enveloped the region for nearly two weeks after the event. Concurrently, the same weather system brought record-breaking cold, dramatic 24-h temperature falls, and early-season snowfall to parts of the Rocky Mountains. Here we use synoptic analysis and air parcel …

Scales Of Connectivity Within Stream Temperature Networks Of The Clackamas River Basin, Oregon, Michael Krochta, Heejun Chang

Geography Faculty Publications and Presentations

Water quality varies along the stream network; thus, considering the directional, dendritic nature of stream networks with surrounding landscape variables is essential in explaining spatial variations of water quality. Using a spatially extensive stream temperature monitoring effort in the Clackamas River Basin in the United States, we first compare spatial scales of analysis of atmospheric, landscape, and in-stream explanatory variables through their correlation with summer stream temperatures. We then derive a predictive stream temperature model with factors representing the spatial variation of local climate, recent wildfire effects, and discharge. Finally, we compare nonspatial multiple linear regression to a spatial stream …

Urban Streetscape Changes In Portland, Oregon: A Longitudinal Virtual Audit, Tomoya Hanibuchi, David Banis, Hunter Shobe, Tomoki Nakaya, Shohei Nagata

Geography Faculty Publications and Presentations

Streetscape imagery has considerable potential for observing urban change. The literature lacks sufficient longitudinal studies, however, on urban change considering human perception and activities. We conducted a longitudinal virtual audit to observe the change in urban liveliness, human activities, and built environment by examining streetscape imagery taken in the late 2000s and the late 2010s in Portland, Oregon. Eleven untrained crowd workers were recruited to provide liveliness ratings of 24,242 streetscape images for both periods. Tabulation, mapping, and multilevel regression analyses were conducted to observe the distribution, changes in liveliness, and the factors affecting these changes. The results confirmed that …

Earliest Ancient Maya Salt Production In Southern Belize: Excavations At Jay-Yi Nah, Heather Mckillop, Cory Sills

Geography Faculty Publications and Presentations

Salt works along the Yucatan coasts of Mexico and Belize provide a record of salt production for inland trade during the height of Late Classic Maya civilisation (AD 550–800). At the Paynes Creek Salt Works in Belize, production focused on the creation of salt cakes by boiling brine in pots supported over fires in dedicated salt kitchens. Underwater excavations at the Early Classic (AD 250–550) site of Jay-yi Nah now indicate there was a longer and evolving tradition of salt making in the area, one that initially employed large, incurved bowls to meet local or down-the-line trade needs before inland …

Enrichment-Planting With Pines Alters Fuel Amount And Structure In Endangered Araucaria Araucana Forests In Northwestern Patagonia, Argentina, Sofia Cingolani, Ignacio A. Mundo, Ivan Barbera, Andrés Holz, Thomas T. Veblen, Juan Paritsis

Geography Faculty Publications and Presentations

The introduction of non-native tree species for large-scale afforestation may alter the fire regime of native ecosystems by modifying fuel proprieties. We quantified changes in fuel abundance and structure resulting from the establishment of commercial Pinus spp. plantations in Araucaria araucana ecosystems in northwestern Patagonia, Argentina. Specifically, we assessed the amount, distribution, and condition (live/dead) of surface and standing fine fuel in A. araucana stands with mature pine plantations (i.e. > 20 cm dbh) and in stands dominated only by A. araucana (control). Our study shows that both types of stands are prone to wildfires, but pine plantations have fuel characteristics …

People, Place, And Planet: Global Review Of Use-Inspired Research On Water-Related Ecosystem Services In Urban Wetlands, Jason Sauer, Heejun Chang

Geography Faculty Publications and Presentations

With climate change and urbanization, city planners and developers have increasing interest and practice in constructing, restoring, or incorporating wetlands as forms of green infrastructure to maintain water-related ecosystem services (WES). We reviewed studies that valued in functional or monetary units the water regulation and purification services of urban wetlands around the globe. We used the adaptive management cycle (AMC) as a heuristic to determine the step that a study would represent in the AMC, the connections between the cycle steps that were used or considered, and the stakeholders involved. Additionally, we identified the social, ecological, and/or technological dimension(s) of …

Relating Social, Ecological, And Technological Vulnerability To Future Flood Exposure At Two Spatial Scales In Four U.S. Cities, Jason Sauer, Arun Pallathadka, Idowu Ajibade, Marta Berbés-Blázquez, Heejun Chang, Elizabeth M. Cook, Nancy B. Grimm, David Iwaniec, Robert Lloyd, Gregory C. Post

Geography Faculty Publications and Presentations

Flooding occurs at different scales and unevenly affects urban populations based on the broader social, ecological, and technological system (SETS) characteristics particular to cities. As hydrological models improve in spatial scale and account for more mechanisms of flooding, there is a continuous need to examine the relationships between flood exposure and SETS drivers of flood vulnerability. In this study, we related fine-scale measures of future flood exposure—the First Street Foundation's Flood Factor and estimated change in chance of extreme flood exposure—to SETS indicators like building age, poverty, and historical redlining, at the parcel and census block group (CBG) scales in …

Portland’S Response To The Western North American Heatwave: A Brief Report, Athanasios Burlotos, Caleb Dresser, Vivek Shandas

Geography Faculty Publications and Presentations

Background:

In June of 2021, a heatwave resulted in high mortality across the Pacific Northwest region. The city of Portland, Oregon, had many advantages: emergency response personnel, science-based policies, political support for climate change adaptation, and collaboration among municipal, county, state, and federal authorities. Though the city’s response likely prevented many deaths, heat-related mortality was high.

Methods:

This study presents a retrospective case analysis of the 2021 Western North American Heatwave in Portland, Oregon. Specifically, the study examines the limitations of current heatwave response paradigms by means of a narrative review of the heatwave response and impacts.

Results:

Most deaths …

Subseasonal Clustering Of Atmospheric Rivers Over The Western United States, Emily Slinskey, Paul Loikith, Naomi Goldenson, Jesse Norris, Jesse Hall

Geography Faculty Publications and Presentations

The serial occurrence of atmospheric rivers (ARs) along the US West Coast can lead to prolonged and exacerbated hydrologic impacts, threatening flood-control and water-supply infrastructure due to soil saturation and diminished recovery time between storms. Here a statistical approach for quantifying subseasonal temporal clustering among extreme events is applied to a 41-year (1979–2019) wintertime AR catalog across the western United States (US). Observed AR occurrence, compared against a randomly distributed AR timeseries with the same average event density, reveals temporal clustering at a greater-than-random rate across the western US with a distinct geographical pattern. Compared to the Pacific Northwest, significant …

Lightning-Ignited Wildfires In The Western United States: Ignition Precipitation And Associated Environmental Conditions, Dmitri Alexander Kalashnikov, John T. Abatzoglou, Paul Loikith, Nicholas J. Nauslar, Yianna Sotirios Bekris, Deepti Singh

Geography Faculty Publications and Presentations

Cloud-to-ground lightning with minimal rainfall (“dry” lightning) is a major wildfire ignition source in the western United States (WUS). Although dry lightning is commonly defined as occurring with <2.5 mm of daily-accumulated precipitation, a rigorous quantification of precipitation amounts concurrent with lightning-ignited wildfires (LIWs) is lacking. We combine wildfire, lightning and precipitation data sets to quantify these ignition precipitation amounts across ecoprovinces of the WUS. The median precipitation for all LIWs is 2.8 mm but varies with vegetation and fire characteristics. “Holdover” fires not detected until 2–5 days following ignition occur with significantly higher precipitation (5.1 mm) compared to fires detected promptly after ignition (2.5 mm), and with cooler and wetter environmental conditions. Further, there is substantial variation in precipitation associated with promptly-detected (1.7–4.6 mm) and holdover (3.0–7.7 mm) fires across ecoprovinces. Consequently, the widely-used 2.5 mm threshold does not fully capture lightning ignition risk and incorporating ecoprovince-specific precipitation amounts would better inform WUS wildfire prediction and management.

Canary In The Forest?—Tree Mortality And Canopy Dieback Of Western Redcedar Linked To Drier And Warmer Summers, Robert A. Andrus, L. R. Peach, A. R. Cinquini, Joseph Hulbert, J. T. Yusi, Andres Holz, M. Fischer, Kevan B. Moffett, Multiple Additional Authors

Geography Faculty Publications and Presentations

Aim: Forest dieback is increasing from unfavourable climate conditions. Western redcedar (WRC)—a culturally, ecologically and economically important species—has recently experienced anomalously high mortality rates and partial canopy dieback. We investigated how WRC tree growth and dieback responded to climate variability and drought using tree-ring methods. Location: Pacific Northwest, USA. Taxon: Western redcedar (Thuja plicata). Methods: We collected tree cores from three tree health status groups (no canopy dieback, partial canopy dieback, and dead trees) at 11 sites in coastal (maritime climate) and interior (continental climate) WRC populations. From growth rates, we computed four growth indices that assessed the resilience to …

Urban Sustainability Implementation And Indicators In The United States: A Systematic Review, Heejun Chang, Arun Pallathadka, Idowu Ajibade

Geography Faculty Publications and Presentations

Urban sustainability is the goal of many cities in the world, yet very few have achieved a level of sustainability that goes beyond the most basic environmental objectives. The practice and assessment of sustainability implementation are greatly compounded by lack of funding, technical know-how, political will, and the power disparity between dominant institutions and marginalized communities. This systematic analysis of urban sustainability literature involved the review of 241 studies published between 2010 and 2022. We critically examined current debates and challenges in urban sustainability, identifying gaps and opportunities and providing recommendations for creating equitable, just, and sustainable urban futures. We …

Quantifying Damages To Soil Health And Emissions From Land Development In The State Of Illinois (Usa), Elena A. Mikhailova, Hamdi A. Zurqani, Zhenbang Hao, Mark A. Schlautman, Gregory C. Post, George B. Shepherd, Christopher C. Post, Renee M. Dixon

Geography Faculty Publications and Presentations

The concept of soil health is increasingly being used as an indicator for sustainable soil management and even includes legislative actions. Current applications of soil health often lack geospatial and monetary analyses of damages (e.g., land development), which can degrade soil health through loss of carbon (C) and productive soils. This study aims to evaluate the damages to soil health (e.g., soil C, the primary soil health indicator) attributed to land developments within the state of Illinois (IL) in the United States of America (USA). All land developments in IL can be associated with damages to soil health, with 13,361.0 …