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Abstract (from http://journal.frontiersin.org/article/10.3389/fpls.2014.00785/abstract): Fire is a key ecological process affecting vegetation dynamics and land cover. The characteristic frequency, size, and intensity of fire are driven by interactions between top-down climate-driven and bottom-up fuel-related processes. Disentangling climatic from non-climatic drivers of past fire regimes is a grand challenge in Earth systems science, and a topic where both paleoecology and ecological modeling have made substantial contributions. In this manuscript, we (1) review the use of sedimentary charcoal as a fire proxy and the methods used in charcoal-based fire history reconstructions; (2) identify existing techniques...
UNL scientists are part of a coalition helping two American Indian tribes prepare for drought and other climate fluctuations. The tribes — the Eastern Shoshone and Northern Arapaho, both located on the Wind River Indian Reservation in western Wyoming — have worked with climate and social scientists in the past year to prepare regular climate and drought summaries for use in making water and resource decisions. A second phase, launched this summer, includes UNL's Cody Knutson and will generate a vulnerability assessment designed to help the tribes reduce the likelihood of future drought-related impacts. Read More: http://news.unl.edu/newsrooms/unltoday/article/researchers-help-tribes-enhance-drought-and-climate-resilience/
This project conducts an interdisciplinary, technical assessment of key social-ecological vulnerabilities, risks, and response capacities of the Wind River Indian Reservation (WRIR) to inform development of decision tools to support drought preparedness. It also provides opportunities for 1) development of tribal technical capacity for drought preparedness, and 2) educational programming guided by tribal needs, Traditional Ecological Knowledge (TEK), and indigenous observations of drought for tribal members, with a longer-term goal of transferring lessons learned to other tribes and non-tribal entities. This project has foundational partnerships between the Eastern Shoshone and Northern Arapaho tribes of the WRIR,...
Water laws and drought plans are used to prioritize and allocate scarce water resources. Both have historically been human-centric, failing to account for non-human water needs. In this paper, we examine the development of instream flow legislation and the evolution of drought planning to highlight the growing concern for the non-human impacts of water scarcity. Utilizing a new framework for ecological drought, we analyzed five watershed-scale drought plans in southwestern Montana, USA to understand if, and how, the ecological impacts of drought are currently being assessed. We found that while these plans do account for some ecological impacts, it is primarily through the narrow lens of impacts to fish as measured...
Summary of drought monitoring and limitations in the US Affiliated Pacific Islands (USAPI).
The production of dairy and beef is important for food security and the economies of the U.S. Caribbean. The dairy industry is the leading agricultural sector in Puerto Rico, contributing about 22% of the total agricultural income. Region-wide, beef and dairy production generate over 25,000 jobs and occupy more than 50,000 acres. In the U.S. Virgin Islands, cattle production has been declining in recent years due to higher insurance costs and natural disasters, while sheep and goat production has increased. Caribbean countries are particularly vulnerable to climate change due to their geography and economic capacity. Climate change is driving temperatures higher and the region is experiencing more frequent and intense...
Landscape capability (LC) models are a spatial tool with potential applications in conservation planning. We used survey data to validate LC models as predictors of occurrence and abundance at broad and fine scales for American woodcock (Scolopax minor) and ruffed grouse (Bonasa umbellus). Landscape capability models were reliable predictors of occurrence but were less indicative of relative abundance at route (11.5–14.6 km) and point scales (0.5–1 km). As predictors of occurrence, LC models had high sensitivity (0.71–0.93) and were accurate (0.71–0.88) and precise (0.88 and 0.92 for woodcock and grouse, respectively). Models did not predict point-scale abundance independent of the ability to predict occurrence...
A growing number of wildfire-burned areas throughout the western United States are expected to increase soil erosion rates within watersheds, causing more sediment to be present in downstream rivers and reservoirs, according to a new study by the U.S. Geological Survey.
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This dataset includes the cover of creosote bush (Larrea tridentata)in 1989, 1995, 1999, 2005, and 2009 across southern Arizona. Cover was determined using sub-pixel classifications of two Landsat scenes from path 36, row 38 (centered on latitude: 31.7470, longitude: -111.3981) and path 37, row 38 (31.7470, -112.9431) that encompass Tucson, AZ.
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This folder and its contents include summaries produced from fish and habitat surveys conducted in Mason Creek, tributary of the East Fork Lewis River, SW Washington, during summer of 2017. First, estimates of abundance and survival for juvenile coho salmon were generated for three time periods (early, middle, and late) during the summer of 2017 and reported in the file "Estimates of juvenile coho summer abundance and survival_MasonCreek_2017.xlsx". Second, summaries of the continuous habitat surveys can be found in the file "FinalStats_MasonMill2017_FishRescue.xlsx". Specifically here, the total length of stream habitat by habitat type (flowing, fragmented, dry) and the frequency and area of stream pools are summarized...
The datasets in these child pages are continuous parameter grids (CPG) of annual air temperature data for the years 2000 through 2016 in the Pacific Northwest. Source temperature data was produced by the PRISM Climate Group at Oregon State University.
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The objective of this project was to evaluate the potential for biochar soil amendments to mitigate agricultural drought by characterizing their impacts on soil hydraulics and plant growth across a range of agricultural soil conditions. This data set contains soil water infiltration measurements using Beerkan infiltration rings in four Oregon agricultural soils amended with biochar. Gasified biochars made from wheat straw (AgEnergy, Spokane, WA) and conifer wood (BioLogical, Philomath, OR) were tilled into soils at experimental stations in Madras (loam), Pendleton (silt loam), Aurora (sandy loam), and Klamath Falls (loamy sand). The biochars were incorporated by tillage in fall 2016 to a depth of 12 cm at rates...
Background/Question/Methods In arid and semi-arid landscapes, springs are important sources of surface water and soil moisture for wildlife and vegetation. Springs have been suggested as possible climate-change refugia, however, springs that depend on recent precipitation or snowmelt for recharge may be vulnerable to warming and drought intensification. Effective conservation of spring-dependent ecosystems—and the biodiversity they support—requires empirical approaches to assess resilience of springs to water cycle changes. Unfortunately, hydrologic data is unavailable for most springs, and those hydrologic records that do exist typically have inadequate temporal extent and resolution to adequately characterize...
map background search result map search result map Shifts in Creosote bush in southern Arizona, 1989 - 2009 Soil water infiltration in four biochar-amended soils from Oregon, 2018 Summaries of fish and habitat surveys for juvenile coho salmon in Mason Creek, tributary of the East Fork Lewis River, SW Washington, during summer of 2017 Summaries of fish and habitat surveys for juvenile coho salmon in Mason Creek, tributary of the East Fork Lewis River, SW Washington, during summer of 2017 Shifts in Creosote bush in southern Arizona, 1989 - 2009 Soil water infiltration in four biochar-amended soils from Oregon, 2018