Filters: Tags: percent cover (X)
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Mangrove restoration has a strong potential to enhance the services provided by coastal wetlands on a number of Department of the Interior (DOI) managed lands throughout the southeastern United States of America. Services include storm protection, water quality improvement, and biological carbon sequestration. Forest structural attributes including basal area, tree height, and stem density by species are used to calculate above ground biomass and above ground productivity. Percent cover is used to asses the forest canopy health. The data collected for the soils are: bulk density, percent total Nitrogen, percent total Carbon, and selected samples percent total Phosporus. The forest structure plots were placed in...
Categories: Data;
Types: Citation;
Tags: Avicennia germinans,
Carbon,
Collier County,
Conocarpus erectus,
Ecology,
These data were compiled to assess the recovery of vegetation on reclaimed oil and gas sites. Objective(s) of our study were to assess patterns in reclamation outcomes relative to 1) soil attributes, climate, and time since 39 reclamation and 2) plant and soil reference benchmarks. These data represent observations of vegetation and soil cover from 134 reclaimed oil and gas well pads and 583 AIM reference plots. These data were collected on lands impacted by oil and gas development on the Colorado Plateau as well as Arizona and New Mexico Plateau of New Mexico, Colorado, and Utah. Data was collected from July- September of 2020 and May-September of 2021. These data were collected by Assessment Inventory and Monitoring...
Categories: Data;
Tags: AIM reference plots,
Arizona and New Mexico Plateau,
Assessment Inventory and Monitoring (AIM),
Botany,
Colorado,
Low-altitude (70 m above ground level) aerial images were collected over five areas of interest within the northern portion of Assateague Island National Seashore (ASIS) in mid-October, 2022. These images were collected to generate photogrammetric products (e.g. digital surface model (DSM), reflectance orthomosaic) to support science and data needs of National Park managers attempting to locate invasive Phragmites australis expansion. A DJI Matrice 600 uncrewed aircraft system (UAS) was equipped with a MicaSense Altum-PT multispectral camera and a Ricoh GRII true-color RGB camera to collect images simultaneously with sufficient overlap for photogrammetric processing. Ground control points (GCPs), black and white...
SUMMARY FROM ASSOCIATED REPORT: Bromus tectorum (cheatgrass) is an annual grass from Eurasia that has invaded western rangelands. It frequently invades landscapes after wildfire, forming dense stands with fine fuels that shorten typical fire intervals. Thus B. tectorum and wildfire form a positive feedback mechanism that threatens native ecosystems and often impact the rare and endangered species those ecosystems host. It is not an understatement to say that B. tectorum is among the greatest threats to conservation in the intermountain west. Elimination of B. tectorum from the landscape is unrealistic with current technology. Instead, we must learn to manage rangelands so as to minimize the dispersal and establishment...
Types: Downloadable;
Tags: BLM,
Bromus tectorum,
Bureau of Land Management,
CBR 2010,
Central Basin and Range,
Synopsis: This study monitored the response of a species of pine bark beetle, Trypodendron lineatum, to direct and indirect measures of habitat availability in a forest subjected to various levels of harvest intensities. Four stand types (conifer dominated, mixed, deciduous dominated, and deciduous dominated with conifer understory) were treated with four levels of harvest intensity (unharvested, 50%, 80%, and 90% harvested). Prior to harvest, the pine bark beetle was most abundant in stands with many host trees (conifer dominated stands). In the first and second summers after harvest, pine beetle abundance increased exponentially with percent spruce cover and the number of spruce stumps in the stand. Beetles were...
Categories: Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Alberta,
Land use configuration,
Landscape fragmentation,
Natural cover amount,
Natural cover heterogeneity,
The purpose of this field data collection was to test and compare the OceanInsight HDX Mini Spectrometer as an accessible alternative against the more expensive ASD Fieldspec for collecting ground-based hyperspectral reflectance profiles for landcover analysis. The data collection took place in Dog Head Marsh and South Cape Beach within the Waquoit Bay National Estuarine Research Reserve (WBNERR). The hyperspectral profiles were collected side-by-side with both field-spectrometers using comparable sensor collection settings for various ground cover samples. The terrain and vegetation type of these sample were described as well as surveyed using Real Time Kinematic Global Positioning System (RTK-GPS). This data...
Categories: Data;
Tags: CMHRP,
CSV,
Carlson SurvCE,
Coastal and Marine Hazards and Resources Program,
Dog Head Marsh,
SUMMARY FROM ASSOCIATED REPORT: Bromus tectorum (cheatgrass) is an annual grass from Eurasia that has invaded western rangelands. It frequently invades landscapes after wildfire, forming dense stands with fine fuels that shorten typical fire intervals. Thus B. tectorum and wildfire form a positive feedback mechanism that threatens native ecosystems and often impact the rare and endangered species those ecosystems host. It is not an understatement to say that B. tectorum is among the greatest threats to conservation in the intermountain west. Elimination of B. tectorum from the landscape is unrealistic with current technology. Instead, we must learn to manage rangelands so as to minimize the dispersal and establishment...
We conducted vegetation surveys concurrently with elevation surveys at every fourth elevation point (~25% of the elevation points) (Figure 5). We visually assessed percent cover of all plant species within a 0.25 m2 quadrat, and recorded the average and maximum height (measured to the nearest centimeter) of each species. Total plant cover in a plot could exceed 100% due to vegetation layering. Vascular plant nomenclature generally follows Baldwin et al. (2012) and Cook et al. (2013). We located 69 tidal wetland species in 2,154 vegetation plots across the nine estuaries in the study. Common species included Carex lyngbyei, Sarcocornia perennis, Distichlis spicata, Deschampsia cespitosa, Juncus balticus and Potentilla...
Synopsis: This study tested the null hypothesis that densities of mammalian populations are constant over patches of varied size. In other words, performance as estimated by density does not covary with patch area. Researchers used a composite database from published studies and found that densities of 20 out of 32 species did not vary with patch area. Five species showed increasing density-area relationships and seven species showed decreasing density-area relationships. Landscapes comprised of smaller, less isolated patched tended to have negative density-area relationships and landscapes with large, more isolated patched tended to have positive density-area relationships. These results indicate that there are...
Categories: Publication;
Types: Citation;
Tags: Density-area relationships,
Landscape fragmentation,
Natural cover amount,
configuration,
fragmentation,
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