Jason Stoker

Daily calling activity for Pseudacris crucifer at site SC4DAI2 in the St. Croix National Scenic Riverway from 2008 to 2012, as indicated by the results of integrating daily median dB values across 2900 to 3200 Hz and 2100 to 2300 h

To describe calling activity of Pseudacris crucifer in relation to temperature, precipitation, and wetland water levels, we programmed an acoustic recorder (Wildlife Acoustics) to sample seasonal amphibian calls remotely at study site SC4DAI2 in the St. Croix National Scenic Riverway from 2008 to 2012. We programmed the recorder to sample for five minutes at the top of every hour of every day from late winter/early spring through late summer. We used the Songscape option in Songscope software to generate annual summaries of all of our acoustic samples from SC4DAI2. These summaries included a median dB level for each prescribed frequency within each recording. Pseudacris crucifer, the spring peeper, inhabited SC4DAI2...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Pseudacris crucifer, St. Croix National Scenic Riverway, Wisconsin, USA, USGS Science Data Catalog (SDC), air temperature, amphibian calling activity, All tags... precipitation (atmospheric), temperature, wetland surface-water availability, Fewer tags

Corrected digital elevation model in coastal wetlands in Nassau and Duval Counties, Florida, 2018

High-resolution elevation data provide a foundational layer needed to understand regional hydrology and ecology under contemporary and future-predicted conditions with accelerated sea-level rise. While the development of digital elevation models (DEMs) from light detection and ranging data has enhanced the ability to observe elevation in coastal zones, the elevation error can be substantial in densely vegetated coastal wetlands. In response, we developed a machine learning model to reduce vertical error in coastal wetlands for a 1-m DEM from 2018 that covered Nassau and Duval Counties, Florida. Error was reduced by using a random forest regression model within situ observations and predictor variables from optical...

Tags: Duval, Ecology, Florida, Geography, Nassau, All tags... Remote Sensing, South Atlantic, Timucuan Ecological And Historic Preserve, USGS Science Data Catalog (SDC), United States, coastal ecosystems, coastal elevation error reduction, digital elevation models, elevation, elevation error, geoscientificInformation, imageryBaseMapsEarthCover, machine learning, random forest regression model, wetland ecosystems, Fewer tags

Wetland migration analysis for relative sea-level rise scenarios in Nassau and Duval Counties, Florida

This dataset includes probabilistic outputs for estimating areal coverage of current wetland coverage and potential wetland migration under various relative sea-level rise scenarios in Nassau and Duval Counties, which includes the City of Jacksonville and the U.S. National Park Service's Timucuan Ecological and Historic Preserve. These data contain potential migration for regularly oceanic-flooded wetlands (that is, flooded by oceanic water daily) and irregularly oceanic-flooded wetlands (that is, flooded by oceanic water less frequently than daily). The products in this data release were created using an approach that involved digital elevation model error reduction in wetlands (that is, overestimation of elevation...

Tags: Duval, Ecology, Florida, Land Use Change, Nassau, All tags... National Park Service South Atlantic-Gulf Region, Remote Sensing, Timucuan Ecological And Historic Preserve, USGS Science Data Catalog (SDC), United States, biota, environment, wetland ecosystems, Fewer tags

Timing of first and last calls and median calling peaks for Pseudacris crucifer, and of the first call for Hyla chrysoscelis/versicolor, at six wetlands in the St. Croix National Scenic Riverway from 2008-2012

To better understand relations of annual calling phenophases for Pseudacris crucifer, and of the first calls of the season for Hyla chrysoscelis/versicolor, to the timing of the start of the calling season, we compared these dynamics for six wetlands in the St. Croix National Scenic Riverway from 2008 to 2012. We installed an acoustic recorder at each site prior to the start of each calling season and programmed it to record for five minutes at the top of every hour until late summer. We then used the Songscape option in Songscope software to generate annual summaries of all acoustic files recorded at each site. We created contour plots of the summarized median dB values across bandwidths in each recording and then...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Amphibian calling phenology, H. chrysoscelis/versicolor, P. crucifer, St. Croix National Scenic Riverway, Minnesota, USA, USGS Science Data Catalog (SDC), All tags... phenophases, Fewer tags

Seasonal median daily water depths for study wetlands in the Tamarac National Wildlife Refuge, the St. Croix National Scenic Riverway, the North Temperate Lakes Long-term Research area, and the Upper Mississippi River study area from 2008-2012

To relate water levels in our study wetlands to temperature, precipitation, wetland water depth, and amphibian calling activity, we installed one pressure logger in the deepest spot we could find in each wetland. Soon after thawing conditions allowed, we drove a plastic pipe (anchor pipe) into the sediments at the deepest location and secured another pipe to it that contained one pressure logger (Global Water Model 14 and 15 [College Station, TX, USA] or Onset Computer Corporation Model U20-001-04 [Bourne, MA, USA]) suspended approximately 2.5 cm above the sediments. We installed additional individual pressure loggers in the upper part of the logger pipes (in air) at select locations to measure barometric pressure...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: North Temperate Lakes Long-term Research area, Wisconsin, USA, St. Croix National Scenic Riverway, Minnesota, USA, St. Croix National Scenic Riverway, Wisconsin, USA, Tamarac National Wildlife Refuge, Minnesota, USA, USGS Science Data Catalog (SDC), All tags... Upper Mississippi River, Wisconsin, USA, air temperature, amphibian calling activity, field inventory and monitoring, hydroperiod, precipitation (atmospheric), surface-water availability, temperature, water temperature, Fewer tags