Skip to main content
Advanced Search

Filters: Extensions: Citation (X) > Types: Citation (X) > Types: Map Service (X) > Types: OGC WFS Layer (X) > Types: Downloadable (X)

5,453 results (19ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
Forest- Data collected once using GIS prior to fish sampling. Our approach was to focus the study on smaller, headwater catchments because larger streams drained areas containing both hemlock and mixed hardwood forest, making forest-specific comparison intractable. In addition, most of these larger watersheds were impacted by humans (e.g., impoundments, agriculture, quarries) that could confound our assessment of the influence of hemlock. Even after limiting the study to headwater catchments, other possible confounding factors remained; we controlled for landscape variability (i.e., terrain and stream size) through the sampling design and we excluded others (i.e., minimum catchment area,beaver activity) through...
thumbnail
Raw data were collected in Shenandoah National Park during summer 2012. Air and temperature data were collected using temperature loggers at several stations throughout the park. These data were used in the publication of the manuscript "Accounting for groundwater influence on headwater stream thermal sensitivity to climate change" through the journal Ecological Applications. Water temperature data were collected at all 78 reach locations during the summer of 2012 (23 June–7 September). Temperature was measured every hour with a logger.
thumbnail
The data set includes delineation of sampling strata for the six study reaches of the UMRR Program’s LTRM element. Separate strata coverages exist for each of the three monitoring components (fish, vegetation, and water quality) to meet the differing sampling needs among components. Generally, the sampling strata consist of main channel, side channel, backwater, and impounded areas. The fish component further delineates a “shoreline” portion of the strata to be used for sampling gears deployed only along the shoreline. The data are raster in origin, with the center of each pixel representing the sampling location. Cell size is typically 50 meters, although several water quality strata are at 200 meter cell size.
This data set was created to facilitate the BLM Greater Sage-Grouse Land Use Planning Strategy in the Utah Sub-Region. This data was developed and addressed, and used during preparation of an environmental impact statement to consider amendments to 14 BLM land use plans throughout the State of Utah, as well as 6 Forest Service land use plans. This planning process was initiated through issuance of a Notice of Intent published on December 6, 2011. This dataset is associated with the Final Environmental Impact Statement, released to the public via a Notice of Availability on May 29, 2015. The purpose of the planning process is to address protection of greater sage-grouse, in partial response to a March 2010 decision...
thumbnail
The Neversweat Prospect (MMK-092) is located on the right bank of Eldorado Creek, a tributary of Moose Creek. The site is a landscape of the Kantishna Historic Mining District (KHMD). The KHMD is within the boundaries of Denali National Park and Preserve, at the end of the 92 mile Park Road near Wonder Lake. The Neversweat Prospect is a 4.3 acre historic site and contains a small collection of historic buildings and structures, small scale features and landscape features associated with lode mining. The extant features consist of one building (cabin), and 15 structures (three collapsed adits, one partially collapsed adit, one partially collapsed outhouse, a historic road, a historic trail, six rock retaining walls)....
thumbnail
Ongoing and rapid environmental change within western and northern Canada is of major societal and scientific concern and has local- to global-scale implications. There is an urgent need to understand the changes and develop improved diagnostic and predictive modeling tools to manage uncertain futures.
thumbnail
The 2002 Mw 7.9 Denali Fault earthquake, Alaska, provides an unparalleled opportunity to investigate in quantitative detail the regional hillslope mass-wasting response to strong seismic shaking in glacierized terrain. We present the first detailed inventory of ∼1580 coseismic slope failures, out of which some 20% occurred above large valley glaciers, based on mapping from multi-temporal remote sensing data. We find that the Denali earthquake produced at least one order of magnitude fewer landslides in a much narrower corridor along the fault ruptures than empirical predictions for an M ∼8 earthquake would suggest, despite the availability of sufficiently steep and dissected mountainous topography prone to frequent...
thumbnail
Previous studies indicate streams in the watershed of Anchorage, AK, contain elevated concentrations of several Potentially Toxic Metals (PTMs) in the water, suspended and streambed sediment and benthic macro invertebrates. This study investigated the sources, distribution, and uptake of PTMs by aquatic organisms in the watershed and their relationship to land-use patterns. Sampling sites were chosen that represent the watercourses of each of the four major streams in Anchorage. Water, streambed sediment, various species of benthic macroinvertebrates and slimy sculpin ( Cottus cognatus ) were collected throughout the summer of 2005. A lake sediment core was also collected from Campbell Lake to assess PTM deposition...
thumbnail
Microsatellite DNA variation was examined in rainbow trout (Oncorhynchus mykiss) populations from throughout British Columbia, Canada, to address the roles of historical isolation, postglacial dispersal, and contemporary geomorphology in structuring genetic variation and differentiation. We detected signatures of historical isolation and postglacial recolonization in the form of 'interior' and 'coastal' population groupings, a decline in genetic variation as distance increased from putative glacial refugia, and different extents of isolation-by-distance in different regions. Rainbow trout populations were structured genetically into major regions and into smaller watersheds and then into drainages. Within drainages,...
thumbnail
Investigated herein are water and sediment geochemistry, and metal attenuation processes associated with natural acid rock drainage originating from black shale formations in the Macmillan Pass area, Clear Lake prospect and Engineer Creek by the Dempster Highway in the Yukon Territory, Canada. The most metalliferous water having pH 3.0, 150 mg/L Zn, 39 mg/L Ni, 2.8 mg/L Cu and 9.1 mg/L As was found in a tributary stream of Engineer Creek with no known mineral deposits occurring in the vicinity. For all three study areas, the water and sediment geochemistry is significantly affected by the local lithology and prevailing metal attenuation processes. Despite their anomalous acidity and metal contents, the natural acid...
thumbnail
This thesis is an investigation of the biophysical controls on the three modes of methane (CH4 ) release from a boreal peatland: diffusion, plant-mediated transport and ebullition. My objectives were to (1) quantify the total CH4 flux of a permafrost thaw-affected peatland, (2) establish the relative importance of the three modes of CH4 release in these systems, and (3) identify key biotic and abiotic controls on individual transport mechanisms. Results showed that ebullition and plant-mediated transport were the dominant pathways for CH4 release and that traditional approaches for measuring total CH4 flux from peatland soils underestimated total efflux by not capturing ebullition. Further, results from a laboratory...


map background search result map search result map 2012 Air and Temperature Data from Shenandoah National Park Fish Population and Hemlock data in Delware Water Gap LTRM Water Quality Sampling Strata BLM UT Preliminary Disturbance Inventory Polygon 2008 Campbell Tract Non-native Plant Survey: Revisiting permanent monitoring transects established in 2006. Report funded and prepared for Bureau of Land Management Alaska State Office Biogeography of select avian species in Alaska’s National Parks Observation, Diagnosis, and Prediction of Environmental Change in Northwestern Canada Differences in Ecosystem Carbon Distribution and Nutrient Cycling Linked to Forest Tree Species Composition in a Mid-Successional Boreal Forest Moose: Competing and Complementary Values Upper Cook Inlet 2011 ; Fishery Issues & Recommendations Physical and ecological controls on methane release from a boreal peatland in interior Alaska Downstream Migrations of Juvenile Salmon and Other Fishes in the Upper Yukon River Why so few? Landslides triggered by the 2002 Denali earthquake, Alaska Natural acid rock drainage associated with black shale in the Yukon Territory, Canada Yukon Southern Lakes Nest Box Project Report, 2000 ASSESSMENT REPORT for EXPLORATION on the ANNE 1 to 4 QUARTZ MINING CLAIMS, MARSH LAKE, YUKON TERRITORY between April, 2005 and April, 2006 Biogeochemical pathways and land use associations of potentially toxic metals in the Anchorage watershed, Alaska Neversweat Prospect: Cultural Landscape Inventory, Denali National Park, National Park Service The influence of Wisconsinan glaciation and contemporary stream hydrology on microsatellite DNA variation in rainbow trout (Oncorhynchus mykiss) 2008 Campbell Tract Non-native Plant Survey: Revisiting permanent monitoring transects established in 2006. Report funded and prepared for Bureau of Land Management Alaska State Office Differences in Ecosystem Carbon Distribution and Nutrient Cycling Linked to Forest Tree Species Composition in a Mid-Successional Boreal Forest Biogeochemical pathways and land use associations of potentially toxic metals in the Anchorage watershed, Alaska Fish Population and Hemlock data in Delware Water Gap ASSESSMENT REPORT for EXPLORATION on the ANNE 1 to 4 QUARTZ MINING CLAIMS, MARSH LAKE, YUKON TERRITORY between April, 2005 and April, 2006 2012 Air and Temperature Data from Shenandoah National Park Physical and ecological controls on methane release from a boreal peatland in interior Alaska Neversweat Prospect: Cultural Landscape Inventory, Denali National Park, National Park Service Yukon Southern Lakes Nest Box Project Report, 2000 Upper Cook Inlet 2011 ; Fishery Issues & Recommendations Natural acid rock drainage associated with black shale in the Yukon Territory, Canada BLM UT Preliminary Disturbance Inventory Polygon LTRM Water Quality Sampling Strata Why so few? Landslides triggered by the 2002 Denali earthquake, Alaska Observation, Diagnosis, and Prediction of Environmental Change in Northwestern Canada The influence of Wisconsinan glaciation and contemporary stream hydrology on microsatellite DNA variation in rainbow trout (Oncorhynchus mykiss) Downstream Migrations of Juvenile Salmon and Other Fishes in the Upper Yukon River Biogeography of select avian species in Alaska’s National Parks Moose: Competing and Complementary Values