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The South Central CASC supports Communities of Practice who are dedicated to finding solutions to the challenges of a changing climate. The Communities of Practice comprise researchers and stakeholders who share a common interest and choose to invest their time in learning from others and developing new collaborations. As of March 2021, the South Central CASC is actively supporting six Communities of Practice. The Communities of Practice members meet together regularly and engage in a formal check-in with South Central CASC staff on a quarterly basis. The groups are also a key part of our Annual Fall Science Meeting where they outline goals and objectives for their group over the next year. The topics of interest...
Researchers developed a custom model that integrates gSSURGO soil property data with condensed climate data from PRISM (e.g., drought index) to predict fraction of available water for a given soil. The model was trained with in situ measured soil moisture data (point measurements) and expanded to spatial extent with gSSURGO maps and PRISM data. The code for the model was developed using a combination of statistical and GIS languages (R, Matlab, ArcGIS, etc.).
Coral Ba/Ca is a proxy for seawater barium concentration that varies with upwelling, terrigenous input, and marine productivity whereas coral Sr/Ca varies with temperature. We examine monthly coral Ba/Ca and Sr/Ca before and during offshore oil exploration in a Siderastrea siderea coral from West Flower Garden Bank located on the continental shelf edge in the Gulf of Mexico. Coral Ba/Ca variations lack pulses driven by upwelling or river outflow and are not in sync with coral Sr/Ca that exhibit a different seasonal pattern. Seasonal variations in chlorophyll-a concentration negatively correlate with coral Ba/Ca explaining 25% of that variability. A significant increase in mean coral Ba/Ca of 1.76 μmol/mol between...
Categories: Publication; Types: Citation
The Chestnut-collared Longspur (Calcarius ornatus; CCLO) is a grassland bird that winters in shortgrass prairies and desert grasslands of the South-Central and Southwest United States and the Chihuahuan Grasslands of North Central Mexico. This species feeds on native grass seeds in high-density flocks, uses cattle water tanks as its primary water source, and prefers areas recently burned, grazed, or mowed. Generally, grassland bird species’ populations have been declining since 1970 due to a decrease in suitable grassland habitats. Land use practices such as agricultural development, paired with competition from invasive grass species, such as Lehmann’s lovegrass (Eragrostis lehmanniana), are the largest...
The coastal prairie in Laguna Atascosa National Wildlife Refuge-Bahia Grande Unit in South Texas protects inland areas from storm surges and erosion while also serving as habitat for grassland-dependent species, such as the federally Endangered northern aplomado falcon (Falco femoralis septentrionalis). Past research indicates that each falcon breeding pair requires at least two thousand acres of open prairie with low woody plant densities to establish and occupy a territory. Records from the early 1900s indicate the Bahia Grande Unit was once an expansive coastal prairie and home to a healthy northern aplomado falcon population. However, historic land management practices, such as overgrazing and fire suppression,...
Abstract (from Springer): Salt marshes can attenuate nutrient pollution and store large amounts of ‘blue carbon’ in their soils, however, the value of sequestered carbon may be partially offset by nitrous oxide (N2O) emissions. Global climate and land use changes result in higher temperatures and inputs of reactive nitrogen (Nr) into coastal zones. Here, we investigated the combined effects of elevated temperature (ambient + 5℃) and Nr (double ambient concentrations) on nitrogen processing in marsh soils from two climatic regions (Quebec, Canada and Louisiana, U.S.) with two vegetation types, Sporobolus alterniflorus (= Spartina alterniflora) and Sporobolus pumilus (= Spartina patens), using 24-h laboratory incubation...
Categories: Publication; Types: Citation
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These data were generated with MAXENT 3.3.3k freeware (Phillips et al. 2011) using climate data and fire probability data for for three time periods: reference (1900-1929), mid-century (2040-2069) and late century (2070-2099), and community occurrence point data extracted from LANDFIRE Environmental Site Potential (ESP). Future time period data are from three global climate models (GCMs): CGCM, GFDL, and HadCM3. In MAXENT, we used the logistic output format (generating presence probabilities between 0 and 1), a random test percentage of 30 (using 70 % of the occurrence points to generate the suitability model and 30 % of the occurrence points to validate it), and a jackknife test to measure variable importance....
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The South Central U.S. is one of the main agricultural regions in North America: annual agricultural production is valued at more than $44 billion dollars. However, as climate conditions change, the region is experiencing more frequent and severe droughts, with significant impacts on agriculture and broader consequences for land management. For example, in 2011 drought caused an estimated $7.6 billion in agricultural losses in Texas and an additional $1.6 billion in Oklahoma. Although there are many drought monitoring tools available, most of these tools were developed without input from the stakeholders, such as farmers and ranchers, who are intended to use them. The goal of this project is to assess the information...
map background search result map search result map FY 2014 Projects Drought Indicators of the South Central Plains (1981-2014) Reference period and projected environmental suitability scores Communities of Practice FY 2014 Projects Drought Indicators of the South Central Plains (1981-2014) Communities of Practice Reference period and projected environmental suitability scores