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Abstract (from MDPI): Intermittent and ephemeral streams represent more than half of the length of the global river network. Dryland freshwater ecosystems are especially vulnerable to changes in human-related water uses as well as shifts in terrestrial climates. Yet, the description and quantification of patterns of flow permanence in these systems is challenging mostly due to difficulties in instrumentation. Here, we took advantage of existing stream temperature datasets in dryland streams in the northwest Great Basin desert, USA, to extract critical information on climate-sensitive patterns of flow permanence. We used a signal detection technique, Hidden Markov Models (HMMs), to extract information from daily...
Abstract (from https://link.springer.com/article/10.1007/s11160-017-9477-y): To date, there are few comprehensive assessments of how climate change affects inland finfish, fisheries, and aquaculture at a global scale, but one is necessary to identify research needs and commonalities across regions and to help guide decision making and funding priorities. Broadly, the consequences of climate change on inland fishes will impact global food security, the livelihoods of people who depend on inland capture and recreational fisheries. However, understanding how climate change will affect inland fishes and fisheries has lagged behind marine assessments. Building from a North American inland fisheries assessment, we convened...
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The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e., green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed plant phenology in spring as well as a theoretically perfect surfer, and 98% surfed better than random. Green-wave surfing varied among individuals, and was unrelated to age or energetic state. Instead, the greenscape, which we define as the order, rate, and duration of green-up along migratory routes, was the primary factor influencing surfing. Our results indicate that...
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The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e., green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed plant phenology in spring as well as a theoretically perfect surfer, and 98% surfed better than random. Green-wave surfing varied among individuals, and was unrelated to age or energetic state. Instead, the greenscape, which we define as the order, rate, and duration of green-up along migratory routes, was the primary factor influencing surfing. Our results indicate that...
Abstract: Greenhouse gas-induced climate change will have notable effects on the Great Lakes region, in the atmosphere, land surfaces, and lakes themselves. Simulations of these effects were carried out using the Coupled Hydrosphere-Atmosphere Research Model (CHARM), driven by output from the Canadian General Circulation Model version 3 (CRCM3) for past and future time periods. This results in increased downward longwave radiation and near-surface air temperature. The air temperature increases during summer have strong spatial minima directly over the lakes that are limited to the lowest model layer and seem to be associated with frequent fog depicted by CHARM. Precipitation is also generally increased, with the...
Abstract (from http://link.springer.com/article/10.1007%2Fs10980-015-0205-5): Context The Florida Everglades has diminished in size and its existing wetland hydrology has been altered. The endangered snail kite (Rostrhamus sociabilis) has nearly abandoned the Everglades, and its prey, the apple snail (Pomacea paludosa), has declined. Objective We developed a population model (EverSnail) to understand apple snail response to inter- and intra-annual fluctuations in water depths over the Everglades landscape. EverSnail was developed as a tool to understand how apple snails respond to different hydrologic scenarios. Methods EverSnail is an age- and size-structured, spatially-explicit landscape model of P. paludosa...
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The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e., green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed plant phenology in spring as well as a theoretically perfect surfer, and 98% surfed better than random. Green-wave surfing varied among individuals, and was unrelated to age or energetic state. Instead, the greenscape, which we define as the order, rate, and duration of green-up along migratory routes, was the primary factor influencing surfing. Our results indicate that...
The Department of the Interior Climate Science Centers (CSCs) and their managing organization, the National Climate Change and Wildlife Science Center at the U.S. Geological Survey, have chosen the emerging climate science field of Ecological Drought as a research focus area. This workshop is part of a series of meetings at each of the nation’s eight CSCs aimed at collating our existing knowledge of the ecological impacts, resistance, and recovery from drought. The eight CSCs provide a fantastic opportunity to compare the ecological effects of drought, related research activities, and management options at different regions, spatial scales, and biomes of drought, related research activities, and management options...
After an absence throughout much of the 20th century, moose began to re-colonize New York and other southerly sections of their historic range over the last 30 years (Wattles and DeStefano 2011), including the Adirondack Park and surrounding areas. Sightings by the public and private forest land owners and road and other mortalities have confirmed its presence in the state, but total number, density, and distribution remain unknown for New York. High densities coupled with health and productivity issues in adjacent states and provinces have prompted New York Department of Environmental Conservation (NYSDEC) wildlife biologists/managers to initiate research to address questions about the moose population in northern...
This article was released as a USGS Science Feature on January 29, 2013. The article gives an overview of the findings from the NCCWSC supported project "The Potential Influence of Changing Climate on the Persistence of at Risk Native Salmonids".
This sea-level rise modeling program began in 2008 and is located at the U.S. Geological Survey, Western Ecological Research Center. The focus is to provide site level ground data and results that land managers, planners, and those concerned with the conservation of salt marsh habitats can use to make well-informed climate change adaptation decisions. The work is being done by the USGS San Francisco Bay Estuary Field Station and Dixon Field Station researchers. This interdisciplinary research program objectives include understand the risk to salt marsh endangered species using sea-level rise modeling, storm monitoring, and movement of animals during high water events. In addition, the ability for salt marsh habitats...
This Catalog contains Geographic Information System (GIS) data in georeferenced vector (point) and raster format. The vector (point) data are available in Environmental Systems Research Institute (ESRI) shapefile format and in comma-separated text (*.csv) files. Shapefiles generally include *.shp, *.shx, *.xml, and *.dbf files at a minimum. All of these data files also include the *.prj files, which contain the dataset projection information. The corresponding 4-km resolution raster data are available in ESRI GRID format. The GIS files have been bundled by year. Each data type (shp, GRID, csv) has a compressed WinRAR zip file—one for each year, hence every zip file may contain up to 12 months of data. In addition...
The USGS Geo Data Portal (GDP) project provides scientists and environmental resource managers access to downscaled climate projections and other data resources that are otherwise difficult to access and manipulate. This user interface demonstrates an example implementation of the GDP project web-service software and standards-based data integration strategy.


map background search result map search result map The greenscape shapes surfing of resource waves in a large migratory herbivore Individual Variability in Surfing Migration Dates The greenscape shapes surfing of resource waves in a large migratory herbivore Individual Variability in Surfing Migration Dates