Filters: Tags: vegetation cover (X)
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A high spatial resolution storm surge model was developed for the YK Delta area to assess biological impacts of storm surges under current and future climates. Storm surges are expected to be more frequent and more severe in the YK Delta area due to climate change and sea level rise. The biological impacts in the YK Delta due to the changed storm surges could be extreme.The model was assessed with respect to measured water level data at the coast and, where available, spatial extent of inundation, for 6 storms from the period 1992 to 2011. In total, inundation projections from 9 historical storms (5 from the assessment + 4 others) were developed. For each storm, an spatial inundation index (time-integral of water...
Categories: Data,
Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: ARCHAEOLOGICAL AREAS,
ARCHAEOLOGICAL AREAS,
Academics & scientific researchers,
COASTAL AREAS,
COASTAL AREAS,
This project used existing ShoreZone coastal imagery to map 719 km of shoreline in Bristol Bay, from Cape Constantine to Cape Newenham. This section of coastline is an extremely important herring spawning area and an important component of the Bristol Bay fisheries. Intertidal and nearshore vegetation, on which herring spawn, was catalogued as part of the mapping and, along with shore types, coastal substrate, and coastal biota, added to the state-wide ShoreZone dataset.
Categories: Data;
Tags: COASTAL HABITAT,
COASTAL HABITAT,
COASTAL LANDFORMS,
COASTAL LANDFORMS,
DATA DELIVERY,
The objective of this project was to produce an Alaskan Existing Vegetation Type (AKEVT) map at 30m resolution for a portion of the Western Alaska Landscape Conservation Cooperative (WALCC) region using a very consistent (2000 +/- 1 yr.) remote sensing data set (Landsat 7 ETM+) and the same methodology. The mapped area encompasses the western and northern parts of the WALCC region, plus the Kodiak Archipelago.
Categories: Data,
Image;
Tags: Federal resource managers,
Image,
LAND COVER,
LAND COVER,
LCC Network Science Catalog,
This project produced an existing vegetation type map at 30m resolution for the northern half of the Western Alaska LCC region, and Kodiak Archipelago. The lack of a consistently mapped vegetation data layer for Alaska has been identified as a primary road block for many conservation and management entities across the state. This project addresses a number of the LCC conservation goals by addressing a baseline science and provides a foundation for current and future projects within the region. This project utilized imagery and data already available that had been used in the LANDFIRE vegetation layer from the early 2000s (http://www.landfire.gov/index.php). A reanalysis of the imagery was made by an Alaskan company,...
Categories: Data;
Tags: Data,
LAND COVER,
LCC Network Science Catalog,
VEGETATION,
VEGETATION COVER,
Soil evaporation, a critical ecohydrological process in drylands, can exhibit substantial spatio-temporal variation. Spatially, ecohydrological controls of soil evaporation may generally depend on a hierarchical structure spanning from the presence or absence of litter, through canopy patches of woody plants and intercanopy patches separating them, up to the overall vegetation mosaic characterized by density of woody plant cover in the landscape, although assessment of these factors in concert is generally lacking. Temporally, ecohydrological controls can be further complicated by not only seasonal climate, but also phenology, particularly in seasonally deciduous drylands. We experimentally assessed the interactive...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Journal of Arid Environments,
canopy cover,
drylands,
ecohydrology,
hemispherical photography,
Multi-season satellite imagery (Landsat ETM+) from 1999-2001 were used in conjunction with digital elevation model (DEM) derived datasets (e.g. elevation, landform, aspect, etc.) to model natural and semi-natural vegetation. The minimum mapping unit for this dataset is approximately 1 acre. Landcover classes are drawn from NatureServe's Ecological System concept, with 109 of the 125 total classes mapped at the system level. For the majority of classes, a decision tree classifier was used to discriminate landcover types, while a minority of classes (e.g. urban classes, sand dunes, burn scars, etc.) were mapped using other techniques. Twenty mapping areas, each characterized by similar ecological and spectral characteristics,...
Tags: landcover,
vegetation cover
Map showing the area proposed for ShoreZone mapping (in red) with FY13 funds from the Western Alaska Landscape Conservation Cooperative funds; the coastline with existing ShoreZone imagery and mapped data in blue; and the coastline with existing ShoreZone imagery that remains to be mapped in green. This imagery was collected in either 2006 (Bristol Bay survey July 19-23, 2006) or 2011 (Southwest Alaska/Alaska Peninsula May 16-21, 2011).This project provided systematic coastal habitat imagery and mapping for the Alaska Peninsula shoreline following the Alaska ShoreZone Mapping Protocol and made these products web-accessible. The completed mapping product is available on the ShoreZone website in a searchable dataset....
Categories: Data;
Tags: COASTAL AREAS,
COASTAL AREAS,
COASTAL HABITAT,
COASTAL HABITAT,
COASTAL LANDFORMS,
This project produced an existing vegetation type map at 30m resolution for the northern half of the Western Alaska LCC region, and Kodiak Archipelago. The lack of a consistently mapped vegetation data layer for Alaska has been identified as a primary road block for many conservation and management entities across the state. This project addresses a number of the LCC conservation goals by addressing a baseline science and provides a foundation for current and future projects within the region.
Categories: Data;
Tags: Federal resource managers,
LAND COVER,
LAND COVER,
LCC Network Science Catalog,
Report,
These tabular data were compiled for/to monitor vegetation and biocrust cover in a never grazed grassland located in Canyonlands National Park. An objective, or objectives, of our study was to document potential changes in biocrust and vegetation cover and species composition as related to changes in land use and climate change. These data represent a timeseries of long-term vegetation and biocrust monitoring plots, dating from 1996 to 2021. These data were collected at/in Virginia Park, Needles District of Canyonlands National Park, Utah. These data were collected by the U.S. Geological Survey, Southwest Biological Research Center in coordination with the US National Park Service. Data were collected via field...
The tundra biome is the dominant terrestrial ecosystem of the circumpolar north, and its fate in a rapidly changing climate is of high scientific and socioeconomic concern. One of those concerns is that the majority of caribou herds throughout the circumpolar north are declining, perhaps as a result of climate change. The principal objective of this research is to reveal the connections between soil nutrient cycling, forage quality and caribou habitat selection.
Categories: Data;
Tags: ALPINE/TUNDRA,
ALPINE/TUNDRA,
CARBON,
CARBON,
CARBON CYCLE/CARBON BUDGET MODELS,
Multi-season satellite imagery (Landsat ETM+) from 1999-2001 were used in conjunction with digital elevation model (DEM) derived datasets (e.g. elevation, landform, aspect, etc.) to model natural and semi-natural vegetation. The minimum mapping unit for this dataset is approximately 1 acre. Landcover classes are drawn from NatureServe's Ecological System concept, with 109 of the 125 total classes mapped at the system level. For the majority of classes, a decision tree classifier was used to discriminate landcover types, while a minority of classes (e.g. urban classes, sand dunes, burn scars, etc.) were mapped using other techniques. Twenty mapping areas, each characterized by similar ecological and spectral characteristics,...
Tags: landcover,
vegetation cover
The tundra biome is the dominant terrestrial ecosystem of the circumpolar north, and its fate in a rapidly changing climate is of high scientific and socioeconomic concern. One of those concerns is that the majority of caribou herds throughout the circumpolar north are declining, perhaps as a result of climate change. The principal objective of this research is to reveal the connections between soil nutrient cycling, forage quality and caribou habitat selection.
Categories: Data;
Tags: ALPINE/TUNDRA,
ALPINE/TUNDRA,
CARBON,
CARBON,
CARBON CYCLE/CARBON BUDGET MODELS,
This project used existing ShoreZone coastal imagery to map 719 km of shoreline in Bristol Bay, from Cape Constantine to Cape Newenham. This section of coastline is an extremely important herring spawning area and an important component of the Bristol Bay fisheries. Intertidal and nearshore vegetation, on which herring spawn, was catalogued as part of the mapping and, along with shore types, coastal substrate, and coastal biota, added to the state-wide ShoreZone dataset.
Categories: Data;
Tags: COASTAL HABITAT,
COASTAL HABITAT,
COASTAL LANDFORMS,
COASTAL LANDFORMS,
DATA DELIVERY,
A high spatial resolution storm surge model was developed for the YK Delta area to assess biological impacts of storm surges under current and future climates. Storm surges are expected to be more frequent and more severe in the YK Delta area due to climate change and sea level rise. The biological impacts in the YK Delta due to the changed storm surges could be extreme.The model was assessed with respect to measured water level data at the coast and, where available, spatial extent of inundation, for 6 storms from the period 1992 to 2011. In total, inundation projections from 9 historical storms (5 from the assessment + 4 others) were developed. For each storm, an spatial inundation index (time-integral of water...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: ARCHAEOLOGICAL AREAS,
ARCHAEOLOGICAL AREAS,
Academics & scientific researchers,
COASTAL AREAS,
COASTAL AREAS,
The Artemisia tridentata spp. wyomingensis (Beetle & A. Young) S.L. Welsh alliance is the most extensive of the big sagebrush complex in the Intermountain West and is characterized by a wide range of environments and vegetation heterogeneity. The purpose of this study was to identify environmental factors driving variation in plant species composition and determine the potential for using environmental factors to explain vegetation characteristics of the A. tridentata spp. wyomingensis alliance. Seventeen environmental factors and seven vegetation response variables were measured on 107 relatively undisturbed, late seral A. tridentata spp. wyomingensis sites across southeastern Oregon and northern Nevada. Non-metric...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Journal of Arid Environments,
composition,
soil characteristics,
vegetation cover,
vegetation structure,
Multi-season satellite imagery (Landsat ETM+) from 1999-2001 were used in conjunction with digital elevation model (DEM) derived datasets (e.g. elevation, landform, aspect, etc.) to model natural and semi-natural vegetation. The minimum mapping unit for this dataset is approximately 1 acre. Landcover classes are drawn from NatureServe's Ecological System concept, with 109 of the 125 total classes mapped at the system level. For the majority of classes, a decision tree classifier was used to discriminate landcover types, while a minority of classes (e.g. urban classes, sand dunes, burn scars, etc.) were mapped using other techniques. Twenty mapping areas, each characterized by similar ecological and spectral characteristics,...
The file contains ocular percent cover estimates for eight plant functional types occurring in lake-margin wetland plant communities in the Yukon River floodplain within the Yukon Flats National Wildlife Refuge. Observations were collected along up to four 100-meter linear transects oriented perpendicular to the lakeshore. Eight cover classes were used, and the median % cover for each cover class is shown in the dataset. Separate percent cover observations were recorded for each of eight distinct plant community encountered along each transect. Community types were associated with one of three aggregate community types (Grass/Sedge, Shrub, and Forest) for analyses. The dataset also includes a column indicating whether...
These are preliminary vegetative cover surveys for the Nebraska collected for the purpose of developing a land cover map. These data were collected by Nebraska Game and Parks Commission in coordination with the Missouri Resource Assessment Partnership (MoRAP). The overall vegetation community was recorded in addition to the dominant 3 species and percent cover of these vegetative communities: herbaceous, shrub, and woody. A photo was taken of each survey location and attached to the record.
Categories: Data;
Tags: Academics & scientific researchers,
Data,
Federal resource managers,
Interested public,
LCC Network Science Catalog,
The caribou populations of southwest Alaska have declined precipitously over the past decade or more, and the total population of this expansive region currently is 80% below the populations of the late 90’s to early 2000’s. This research is a collaborative effort among the principal managers of this resource to directly address the causes of this decline.The goals of this project was to mechanistically link climate, soil N cycling, plant morphological and nutritional phenology, and caribou population dynamics, by collecting high-quality information to knit together ecosystem function across several trophic levels and at a range of spatial and temporal scales.
Categories: Data;
Tags: ALPINE/TUNDRA,
ALPINE/TUNDRA,
CARBON,
CARBON,
CARBON CYCLE/CARBON BUDGET MODELS,
This project provided systematic coastal habitat imagery and mapping for the Alaska Peninsula shoreline following the Alaska ShoreZone Mapping Protocol and made these products web-accessible. The completed mapping product is available on the ShoreZone website in a searchable dataset. Individuals and communities can query coastal habitat information for use in coastal zone planning. Mapped features include features such as shore types and morphology (e.g., dunes, beaches, and estuaries), intertidal biota (e.g., salt marshes, eelgrass beds, kelp beds) and man-made features (e.g., seawalls, docks). In addition to the dataset, the web-accessible, high resolution low-tide imagery (video and photos) complement the mapped...
Categories: Data;
Tags: COASTAL AREAS,
COASTAL AREAS,
COASTAL HABITAT,
COASTAL HABITAT,
COASTAL LANDFORMS,
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