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Drought and wildfire pose enormous threats to the integrity of natural resources that land managers are charged with protecting. Recent observations and modeling forecasts indicate that these stressors will likely produce catastrophic ecosystem transformations, or abrupt changes in the condition of plants, wildlife, and their habitats, in regions across the country in coming decades. In this project, researchers will bring together land managers who have experienced various degrees of ecosystem transformation (from not yet experiencing any changes to seeing large changes across the lands they manage) to share their perspectives on how to mitigate large-scale changes in land condition. The team will conduct surveys...
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The 2017 fire season in California was highly unusual with its late seasonal timing, the areal extent it burned, and its devastation to communities. These fires were associated with extreme winds and were potentially also influenced by unusually dry conditions during several years leading up to the 2017 events. This fire season brought additional attention and emphasized the vital need for managers in the western U.S. to have access to scientific information on when and where to expect dangerous fire events. Understanding the multiple factors that cause extreme wildfire events is critical to short and long-term forecasting and planning. Seasonal climate measures such as temperature and precipitation are commonly...
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As elevation increases, both temperature and moisture availability decrease. In many parts of the world, this decrease in temperature is a limiting factor for vegetation—at certain elevations, the temperature becomes too cold for plants to survive. However in the tropics, moisture availability may play a more important role than temperature in determining the altitude at which forests can grow. For example on Haleakalā, a volcano on the Hawaiian Island of Mauʻi, the forest line is not found at the same elevation everywhere, as you would expect if it were controlled by temperature. Rather, the forest line is highest in the wetter eastern-most end and lower on the drier, western end of the volcano. Research also...
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Freshwater mussels are an important component of freshwater ecosystems. They can filter a large amount of water, affecting both water clarity and water chemistry. Their shells provide physical habitat for other organisms, they re-direct necessary nutrients to the bottom of the water column, and their excreted material can enhance the growth of algae and macroinvertebrates. However, dramatic declines of freshwater mussels have occurred due to habitat loss, destruction and modification, pollution, and invasive species. One mussel species in Texas (Texas Hornshell) has been listed as endangered under the Endangered Species Act and several other species are candidates for listing. Changes in precipitation patterns...
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The goal of this project was to: (a) archive the relevant AR5 model output data for the southwest region; (b) downscale daily temperature and precipitation to 12 X 12 km cell spatial resolution over the Southwest; (c) assess the precision (degree of agreement) of the simulated models; (d) assess the direction and magnitude of change in projections between AR4 and AR5, as well as assess projections of key extreme climatic events (i.e., extreme drought, extreme seasonal precipitation, extreme high and low temperature events); and (e) assess critical ecosystem impacts (i.e., climate water deficit and fire; hydrological condition of major river systems; impacts on highly valued species).
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The Colorado River is the dominant water source for the southwestern United States, crossing through seven states before reaching Mexico. The river supplies water to approximately 36 million people, irrigates nearly six million acres of farmland within and beyond the basin, and contributes an estimated 26 billion dollars each year to the region’s recreational economy. Yet the Colorado River’s water supply is already fully allocated, meaning that the economic and environmental health of the region is closely tied to the river’s streamflow. Climate projections for the Southwest show a future marked by chronic drought and substantial reductions in streamflow. The region has already been impacted by climate change,...
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Extreme events not only affect people but can have detrimental impacts on natural resources, such as fish and freshwater habitats. Impacts of extreme events, like hurricanes, tornadoes, and extreme flooding, have immediate consequences, but also have the ability to alter habitats and animals far in the future by providing opportunities for exotic species to colonize new areas. Some fish communities in streams, rivers, and lakes may have the natural ability to resist the long-term impacts of extreme weather events. In this project, researchers will investigate the ability of Caribbean fish assemblages in Puerto Rico, which have both economic and cultural importance, to resist the impacts of extreme weather events....
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In the southwestern United States, droughts of 10 or more years are projected to become more frequent by 2100. It also is projected that there will be fewer wet days per year, with more precipitation falling on those wet days. Such climatic extremes can strongly affect wild animals and plants, ecosystems, and humans. In the Southwest, more frequent and intense storms may negatively affect protected species in coastal salt marshes; changes in the timing and amount of precipitation could lead to increases in fuel loads; and increasingly humid heat waves could lead to higher incidence of heat-related illness among visitors to national parks. This project will improve understanding of climate extremes and their potential...
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The Gulf of Mexico coast of Louisiana and Texas faces threats from increasingly destructive extreme weather, heat, subsidence, and coastal erosion. Inland areas also face stronger storms, floods, and shifts in land development patterns. Increasing drought and extreme heat in Texas and New Mexico also exacerbate fires and floods. All of these regions are culturally rich, rapidly changing areas where people are working across political boundaries and organizations to protect and adapt people’s lifeways, sites and artifacts, and culturally important species, places and landscapes. This project will produce an action plan that describes ongoing efforts and identifies gaps in research and funding for cultural preservation...
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Natural climate variability can obscure or enhance long-term trends in experienced weather due to climate change. This can happen temporarily on timescales of a season to several years to a decade or two. Natural variability is poorly described and attributed to specific causes, contributing to uncertainty and misunderstandings about the nature of climate change that stakeholders and resource managers attempt to anticipate. There exists, therefore, a need to clarify the magnitude and causality of natural climate variability. This connection needs to be explained for locally-experienced weather and particularly for daily extreme events, whose seasonal behavior impacts both resources and imagination. Conversely, it...
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Over two-thirds of all landbirds (i.e. birds that spend the majority of their lives in terrestrial environments) in North America migrate long-distances to areas in Mexico, Central and South America and the Caribbean islands. Habitats within Texas and Louisiana support high numbers of birds when they interrupt their migratory journeys through the Gulf of Mexico region to “stopover” for resting and refueling. These stopover habitats are often in areas experiencing human population growth and are impacted by natural disturbances and climate change. Predicted habitat loss from sea level rise and extreme weather events coupled with mismatches in the timing of peak bird migration and peak food abundance may limit the...
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Steep, mountainous watersheds, dramatic climate gradients, and tight links between the land and sea are common features of both the Pacific Islands and Southeast Alaska. In these "ridge-to-reef" and “icefield-to-ocean" ecosystems, environmental changes that occur at higher elevations have downstream impacts on the waters below. Today, these two ecosystems are undergoing changes in climate that are significantly impacting the terrestrial, freshwater, and coastal ecosystems that communities rely on for food, water, recreation, and tourism. For example, changing weather patterns are leading to more frequent and severe extreme storms, atmospheric rivers, droughts, and heat waves. Communities in both regions have deep...
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The Salt and Verde river basins in northeastern Arizona are a vital source of fresh water for the greater Phoenix metropolitan area and for two Native American tribes who rely on the basins’ natural resources for their livelihoods. The region depends on winter rain and snow to replenish the river basins’ water supply. Atmospheric rivers – long, narrow channels in the atmosphere that carry water vapor from the Pacific Ocean – supply a substantial portion of this winter precipitation. While atmospheric rivers are critical for maintaining water resources and preventing drought, they occasionally cause extreme storms that lead to flooding. Scientists project that climate change will affect the intensity and frequency...
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Madagascar, a country rich in natural capital and biodiversity but with high levels of poverty, food insecurity, and population growth, faces a number of development challenges, including obtaining sustained financial support from external sources and building internal capacity to address the poor environmental, health, and socio-economic conditions. Climate change poses an increasing threat to achieving development goals and is usually considered in development plans and project designs. However, there have been numerous challenges in the effective implementation of those plans, particularly in the sustained engagement of the communities to undertake adaptive actions but also due to insufficient scientific information...
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California - one of the nation's most populous states - hosts extensive public lands, crown-jewel national parks, and diverse natural resources. Resource managers in federal, state, tribal, and local agencies face challenges due to environmental changes and extreme events such as severe droughts, heat waves, flood events, massive wildfires, and forest dieback. However, state-of-the-art research that could aid in the management of natural resources facing these challenges is typically slow to be applied, owing to limited time and capacity on the part of both researchers and managers. This project aims to accelerate the application of science to resource management by facilitating the translation and synthesis of...
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The greater Mississippi River Basin drains 3.2 million square kilometers of land and spans 31 U.S. states. Ninety percent of all U.S. agricultural exports are grown in the Mississippi River Basin, and about 40 percent of the nation's total exports are transported through its major rivers. About 1.3 million people, accounting for $405 billion in annual revenues, work in river-related jobs across the basin. Ecologically, the Mississippi River Basin supports about 100 amphibious, reptile, and mammal species and provides habitat for almost 250 fish and 50 mussel species. Its floodplain supports about 40 percent of North America’s wading birds and waterfowl and over 180 National Wildlife Refuges. Yet, even with engineered...
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Climate change is poised to increase the frequency and intensity of extreme weather events – such as tornadoes, flooding, drought, and snowstorms – which may damage buildings and other structures, cause economic hardship, disrupt plant and wildlife communities, and endanger people’s physical and emotional health. The purpose of this project was to enhance the knowledge of local tribal environmental professionals in Oklahoma related to planning for extreme weather events as a result of climate change. Researchers hosted a one-day workshop at the University of Oklahoma (OU) that was attended by professionals representing at least five tribes, as well as interdisciplinary scholars and students engaged in climate...
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Snow avalanches alter mountain environments and have both beneficial and harmful effects on wildlife. Avalanches can benefit wildlife by creating open areas for grazing but can also be deadly when animals are buried in avalanche debris. Avalanches pose high risks to mountain goats because they inhabit rugged and steep terrain, but the actual impacts of avalanches on mountain goats remain unknown.  The goal of this project is to understand how avalanches impact mountain goat habitat and mortality in the Coast Mountains of southeast Alaska. The research team will use long-term data collected from 434 mountain goats outfitted with GPS collars from 2005 to 2022 and avalanche hazard maps to understand how mountain...
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The Pueblo de San Ildefonso is facing increased wildfire risk under climate change. Recent fires have not only burned culturally significant sites, but they have also resulted in a loss of watershed runoff retention, which has increased erosion and the transport of contaminated sediments and soils on Pueblo lands from the adjacent Los Alamos National Laboratory (LANL). A priority for the Pueblo is to ensure that wildfires are managed appropriately and, when large fires do occur, that effective measures are taken to control the aftermath of increased flooding and erosion. This project will build on the knowledge of elders and the community to develop a study plan (or study method) to evaluate different landscape...
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The United States National Park Service (NPS) declared climate change as “the greatest threat to the integrity of our national parks that we have ever experienced.” Climate change is causing not only higher average temperatures in most places but also increasing the severity of storms, the number of heatwaves and wildfires, and causing heavier rainfall. These extreme weather conditions pose major threats to National Parks, which face the loss of wildlife, plants, and important historical and cultural sites. To prevent further loss of our country’s natural and cultural heritage in the next 20 years, plans, strategies, and actions are needed now, rather than for 50-100 years into the future. This research team will...
map background search result map search result map Assessment of Available Climate Models and Projections for the Southwest Region Projecting Future Streamflow in the Colorado River Basin Understanding and Communicating the Role of Natural Climate Variability in a Changing World Improving Understanding of Climate Extremes in the Southwestern United States Identifying Tribal Vulnerabilities and Supporting Planning for Extreme Weather Events Measurement of El Niño Southern Oscillation (ENSO)-related Climate Conditions and Ecosystem Responses in Hawaiʻi Possible Future Changes to Water Resources in the Salt and Verde River Basins Associated with Atmospheric River Events Impacts of Global Change on Biotic Resistance, Resilience, and Ecosystem Services in Caribbean Fish Assemblages, Fisheries, and Aquatic Ecosystems Preventing Extreme Fire Events by Learning from History: The Effects of Wind, Temperature, and Drought Extremes on Fire Activity Improving and Accelerating the Application of Science to Natural Resource Management in California Assessing the Impacts of Rapid Rainfall Shifts (“Whiplashes” and “Boomerangs”) on Freshwater Mussels in Central Texas Adapting to Climate Change: Trends and Severe Storm Responses by Migratory Landbirds and Their Habitats Learning From the Past and Planning for the Future: Experience-Driven Insight Into Managing for Ecosystem Transformations Induced by Drought and Wildfire A Climate Risk Management Screening and Assessment Review for Madagascar’s Country Development Cooperation Strategy Landscape Management Practices on the Pueblo de San Ildefonso Using Precipitation Climatology to Examine the Role of Climate Change in Extreme Events of the Mississippi River Basin Evaluating How Snow Avalanches Impact Mountain Goat Populations in Southeast Alaska An Action Plan for Cultural Resource Climate Adaptation Research and Funding Planning Grant: Understanding the Impacts of Extreme Events on Our National Parks: Past, Present, and Future Understanding Ridge-to-Reef and Icefield-to-Ocean Ecosystem Function in a Changing Climate Landscape Management Practices on the Pueblo de San Ildefonso Impacts of Global Change on Biotic Resistance, Resilience, and Ecosystem Services in Caribbean Fish Assemblages, Fisheries, and Aquatic Ecosystems Possible Future Changes to Water Resources in the Salt and Verde River Basins Associated with Atmospheric River Events Identifying Tribal Vulnerabilities and Supporting Planning for Extreme Weather Events Evaluating How Snow Avalanches Impact Mountain Goat Populations in Southeast Alaska Preventing Extreme Fire Events by Learning from History: The Effects of Wind, Temperature, and Drought Extremes on Fire Activity Improving and Accelerating the Application of Science to Natural Resource Management in California A Climate Risk Management Screening and Assessment Review for Madagascar’s Country Development Cooperation Strategy Projecting Future Streamflow in the Colorado River Basin Learning From the Past and Planning for the Future: Experience-Driven Insight Into Managing for Ecosystem Transformations Induced by Drought and Wildfire Assessing the Impacts of Rapid Rainfall Shifts (“Whiplashes” and “Boomerangs”) on Freshwater Mussels in Central Texas Assessment of Available Climate Models and Projections for the Southwest Region Improving Understanding of Climate Extremes in the Southwestern United States Understanding and Communicating the Role of Natural Climate Variability in a Changing World Adapting to Climate Change: Trends and Severe Storm Responses by Migratory Landbirds and Their Habitats An Action Plan for Cultural Resource Climate Adaptation Research and Funding Planning Grant: Understanding the Impacts of Extreme Events on Our National Parks: Past, Present, and Future Using Precipitation Climatology to Examine the Role of Climate Change in Extreme Events of the Mississippi River Basin Understanding Ridge-to-Reef and Icefield-to-Ocean Ecosystem Function in a Changing Climate