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Climate change impacts on water resources in the Pacific Northwest are predicted to have transformational effects on agriculture. Loss of winter snow pack, reduced summer stream flows, and increased summer temperatures are all phenomena that have already been observed, and are expected to worsen over this century. Research is ongoing in the Northwest to understand agriculture practices that might allow farmers to prepare for these climate change impacts. One potential technique is the use of biochars (charcoal made from decomposition of organic matter at high temperatures in the absence of oxygen), which can be used as a soil amendment that can increase soil moisture retention, improve agricultural yields, and hold...
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In the Pacific Northwest, coastal ecosystems are highly productive areas that support millions of migratory waterbirds, shellfish, salmon and related fish. These species depend on food and habitats provided by estuaries (coastal tidal areas where streams and rivers flow into the ocean) for successful migration and breeding. Climate change effects such as drought, sea-level rise, and changing freshwater flow, precipitation, and temperatures will alter these important habitats. This study examined how changing ocean and freshwater patterns and conditions will influence estuary habitats. The main goal was to provide scientific support for future planning efforts and conservation of natural resources found in coastal...
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In the Northwest U.S., warming temperatures and changing precipitation patterns will likely result in significantly altered snowpack, stream flows, and water availability. Along with these changes comes an increased risk of “ecological drought”, or periods of water stress that impact ecosystems and the services they provide –which can ultimately impact human communities. More frequent and severe ecological droughts have the potential to push ecosystems beyond their ability to recover, resulting in complete changes in ecosystem composition and function. Ecological drought will only worsen existing management challenges, such as competition for water resources, habitat degradation, invasive species, and more frequent...
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Warmer temperatures and less precipitation in the western U.S. related to climate change are harming many important natural resources, including forests, rivers, and many fish and wildlife species. Climate refugia provide a potential opportunity for conserving resources and biodiversity in the face of climate change. These refugia are places where the climate will likely change less than the surrounding landscape and/or places in a landscape where species may move to find more suitable climates. For example, because climate change may alter the frequency, duration, or severity of droughts, small habitats that naturally retain water (drought refugia) may become increasingly important to many natural wildlife communities....
Abstract (from http://journals.ametsoc.org/doi/abs/10.1175/JHM-D-13-0167.1): Drought indices are often used for monitoring interannual variability in macroscale hydrology. However, the diversity of drought indices raises several issues: 1) which indices perform best and where; 2) does the incorporation of potential evapotranspiration (PET) in indices strengthen relationships, and how sensitive is the choice of PET methods to such results; 3) what additional value is added by using higher-spatial-resolution gridded climate layers; and 4) how have observed relationships changed through time. Standardized precipitation index, standardized precipitation evapotranspiration index (SPEI), Palmer drought severity index,...
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Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate.Understanding where streams are perennial is important for a variety of reasons. For example, perennial streams receive special regulatory protections under a variety of statutes, and provide important habitat for fish, wildlife, and other species. To predict the likelihood that streams are perennial, we compiled nearly 25,000 observations...
Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2016, CASC, Completed, Data Visualization & Tools, Data Visualization & Tools, All tags...
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Due to the ecological importance of stream temperature for aquatic species, and concern about rising temperatures associated with climate change, natural resource managers throughout the Pacific Northwest increasingly require locally detailed stream temperature information in order to effectively manage aquatic resources. Recent technological advances in stream temperature monitoring (e.g., digital data loggers and remote sensors) and modeling have increased the amount of data that are available (both observed and projected) throughout the region. These newly available data, although exciting, have strengths and limitations depending on the purposes for which they were developed and the scale(s) at which they can...
Abstract (from http://iopscience.iop.org/article/10.1088/1748-9326/11/8/084009/meta): Record low snowpack conditions were observed at Snow Telemetry stations in the Cascades Mountains, USA during the winters of 2014 and 2015. We tested the hypothesis that these winters are analogs for the temperature sensitivity of Cascades snowpacks. In the Oregon Cascades, the 2014 and 2015 winter air temperature anomalies were approximately +2 °C and +4 °C above the climatological mean. We used a spatially distributed snowpack energy balance model to simulate the sensitivity of multiple snowpack metrics to a +2 °C and +4 °C warming and compared our modeled sensitivities to observed values during 2014 and 2015. We found that for...
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Forests are of tremendous ecological and economic importance. They provide natural places for recreation, clean drinking water, and important habitats for fish and wildlife. However, the warmer temperatures and harsher droughts in the west that are related to climate change are causing die-offs of many trees. Outbreaks of insects, like the mountain pine beetle, that kill trees are also more likely in warmer, drier conditions. To maintain healthy and functioning forest ecosystems, one action forest managers can take is to make management decisions that will help forests adapt to future climate change. However, adaptation is a process based on genetic change and few tools are currently available for managers to use...
Streams are classified as perennial (flowing uninterrupted, year-round) or intermittent (flowing part of the year) or ephemeral (flowing only during rainfall events). The classifications of “streamflow permanence” were primarily established in the middle 20th century and are often outdated and inaccurate today if they were not adjusted for changes in land use, wildfires, or climate. Understanding where streams are perennial is important for a variety of reasons. For example, perennial streams receive special regulatory protections under a variety of statutes, and provide important habitat for fish, wildlife, and other species. To predict the likelihood that streams are perennial, we compiled nearly 25,000 observations...
The increasing threat of drought to the productivity of US rangelands is a socioeconomic and ecological problem that needs pragmatic solutions. The urgency of this issue has fostered partnerships between private landowners and public natural resource managers to find solutions. The use of North American beaver (Castor canadensis) to increase surface water in arid landscapes is one pre-emptive measure that is gaining interest because of the remarkable ability of beavers to impound water. In places where beaver are no longer present, some landowners and managers are installing artificial structures made of rock and wood with the intention of mimicking effects of beaver dams. Although this ecosystem engineering is...
The objective of the Pacific Northwest Biochar Atlas is to share a range of tools, reports, and evaluations of biochars’ abilities to provide these benefits. The purpose of this Atlas is to: Provide guidance to farmers, gardeners, and other end-users on the potential benefits of biochars, including decision support tools to select biochar types and amendment rates. Support biochar producers, by sharing state-of-the-science and state-of the-industry evaluations for the PNW region. Share case studies from early adopters.
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Climate change, drought, habitat alterations, and increasing water demands are leaving less water available for streams of the Pacific Northwest and for fish like salmon. As water levels drop, some small streams become fragmented, transforming from a ribbon of continuous habitat into a series of isolated pools. Fragmented streams may pose a serious threat to salmon. For example, juveniles that become stranded in small pools are at increased risk to overheat, starve, or be consumed by predators. Healthy salmon populations can cope with fragmentation and recover from a bad drought-year. However, many salmon populations are endangered and face long-term drought. Land and resource managers are increasingly finding...
Abstract (from http://iopscience.iop.org/article/10.1088/1748-9326/aa6f94/meta): High temperatures and severe drought contributed to extensive tree mortality from fires and bark beetles during the 2000s in parts of the western continental United States. Several states in this region have greenhouse gas (GHG) emission targets and would benefit from information on the amount of carbon stored in tree biomass killed by disturbance. We quantified mean annual tree mortality from fires, bark beetles, and timber harvest from 2003–2012 for each state in this region. We estimated tree mortality from fires and beetles using tree aboveground carbon (AGC) stock and disturbance data sets derived largely from remote sensing. We...
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This project was designed to use the combined strengths of the cooperators to address their concerns stemming from the degradation of arid environments in the Great Basin. The project aimed to identify the regional ecological and social costs and benefits of both immediate hydrologic modifications (low-profile constructed dams) and longer-term restoration of beavers (Castor canadensis) to these landscapes. Use of these techniques by ranchers and managers of public lands depends on these costs and benefits as well as social context and attitudes; the project aimed to assess these as well. Finally, implementation of hydrologic modifications depends on communication of benefits and costs to stakeholders who may choose...
To improve understanding of streamflow permanence in the Pacific Northwest, we have developed a method for predicting the annual probability of year-round streamflow at 30-meter intervals. The approach involves collecting and processing nearly 24,000 streamflow observations into “wet” or “dry” values, and synchronizing them with 291 predictor datasets that represent physical (one-time values) and climatic (monthly or annual values) conditions associated with the upstream area for each 30-meter point along streams in the Pacific Northwest. Both of these datasets are among the first of their kind and shed light on the scientific opportunities that ‘Big Data’ techniques allow for. The predictive models developed from...
Baltimore, MD, USA: In recent years, wildfires have burned trees and homes to the ground across many states in the western U.S., but the ground itself has not gotten away unscathed. Wildfires, which are on the rise throughout the west as a result of prolonged drought and climate change, can alter soil properties and make it more vulnerable to erosion. A new study shows that the increase in wildfires may double soil erosion in some western U.S. states by 2050, and all that dirt ends up in streams, clogging creeks and degrading water quality. Read More in the ​AAAS News Release >>
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In the Pacific Northwest, cold-water species like salmon are important for recreational sport fishing as well as for commercial fish production. However, climate change is causing lower and warmer summer stream flows that could decimate these fish populations. Aquatic cold-water habitats are further threatened by stormwater runoff, which moves from streets to storm drains and then is often discharged into cold-water rivers and streams. The urban heat island effect (when cities and urban areas are warmer than surrounding rural areas) may heat the temperature of the runoff and if the runoff is very warm, it could tip salmon habitat into fatal conditions. However, specifically how urban warming – or cooling, such...
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Climate change is one of the most pressing issues facing natural resource management. The disruptions it is causing require that we change the way we consider conservation and resource management in order to ensure the future of habitats, species, and human communities. Practitioners often struggle with how to identify and prioritize specific climate adaptation actions (CAAs). Management actions may have a higher probability of being successful if they are informed by available scientific knowledge and findings; a systematic review process provides a mechanism to scientifically assess management questions. By evaluating specific actions on scientific knowledge and findings, we may be able to increase management...
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Wildfires are one of the greatest threats to human infrastructure and the ecosystem services humans value in the western US, but are also necessary in fire-adapted ecosystems. Wildfire activity is widely projected to increase in response to climate change in the Northwest, but we currently lack a comprehensive understanding of what this increase will look like or what its impacts will be on a variety of ecological and hydrologic systems. This project addressed one critical part of those impacts: the islands of unburned vegetation within wildfires. Unburned islands occur naturally as wildfires burn across landscapes, and are important habitat refuges for species -- places where plants and animals survive the fire...
map background search result map search result map Disappearing Refugia: Identifying Trends and Resilience in Unburned Islands under Climate Change The Available Science Assessment Process (ASAP): Evaluating the Science behind Climate Adaptation Actions An Interagency Collaboration to Develop and Evaluate New Science-Based Strategies for Great Basin Watershed Restoration in the Future Evaluating the Effectiveness of Assisted Migration and Fish Rescue Programs Understanding the Relationship Between Urban Trees, Stormwater Runoff, and Cold-Water Streams in a Changing Climate Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest Identifying and Evaluating Refugia from Drought and Climate Change in the Pacific Northwest Using Genetic Information to Understand Drought Tolerance and Bark Beetle Resistance in Whitebark Pine Forests Understanding the Impacts of Ecological Drought on Estuaries in the Pacific Northwest Assessing the Use of Biochar for Drought Resilience and Crop Productivity Innovative Approaches to Ecological Drought: Developing a Stream Temperature Handbook Extremes to Ex-Streams: Informing Ecological Drought Adaptation in the Northwest Understanding the Relationship Between Urban Trees, Stormwater Runoff, and Cold-Water Streams in a Changing Climate Using Genetic Information to Understand Drought Tolerance and Bark Beetle Resistance in Whitebark Pine Forests Understanding the Impacts of Ecological Drought on Estuaries in the Pacific Northwest Evaluating the Effectiveness of Assisted Migration and Fish Rescue Programs An Interagency Collaboration to Develop and Evaluate New Science-Based Strategies for Great Basin Watershed Restoration in the Future The Available Science Assessment Process (ASAP): Evaluating the Science behind Climate Adaptation Actions Disappearing Refugia: Identifying Trends and Resilience in Unburned Islands under Climate Change Innovative Approaches to Ecological Drought: Developing a Stream Temperature Handbook Identifying Resilient Headwater Streams to Mitigate Impacts of Future Drought in the Northwest Assessing the Use of Biochar for Drought Resilience and Crop Productivity Identifying and Evaluating Refugia from Drought and Climate Change in the Pacific Northwest Extremes to Ex-Streams: Informing Ecological Drought Adaptation in the Northwest