Postdoctoral Fellowship In Spatial Data Analysis & Modeling

3 days left

ORAU Maryland Office
Lafayette Springs, Mississippi, US
May 01, 2021
May 11, 2021
Employment Type
Salary Type
Predicted climate change effects have been widely modeled for cool- and coldwater ectothermic species but much less so for warmwater taxa. Our research goals are to elucidate relationships between thermal and biotic characteristics of Coastal Plain stream sites, with emphasis on darters (Etheostoma spp.), and to evaluate physical processes influencing the stream temperatures. In 2011, we established a network of stream temperature recorders in the Little Tallahatchie River drainage, Mississippi, and expanded the network south into the Yocona River drainage in 2012, for a total of 67 sites. Most recorders were in place for at least 5 years, with the last ones removed in 2019. In 2012, we quantitatively sampled fish and crayfish communities at temperature recording sites in order to evaluate correlations between temperature regimes and fish and crayfish communities. The resulting temperature database has over 6.67 million temperature records. In the unstable, sand-bed stream channels characteristic of the region, thermographs tended to become intermittently buried by sediment over time. We installed additional thermographs to test the effects of burying; preliminary analyses suggest that the sand acted as an insulator, moderating microclimates around the thermographs. Although this effect can be detected and accounted for mathematically, it vastly increases the difficulty of preparing the data for analyses.

We seek a post-doc with data analysis, and preferably hydrologic modeling experience to help analyze the data and collaborate on publishing results in peer-reviewed journal articles.

Under the guidance of a mentor, the participant will:
"clean up" the stream temperature dataset, accounting for recorder burial and other oddities in the data
conduct spatial statistical analyses of the stream temperature and biological data to address the research questions
participate in writing manuscripts
possibly conduct additional hydrologic or spatial modeling using other publicly available spatial data
possibly contribute to study design and data analyses for laboratory experiments of temperature effects on darter spawning
possibly incorporate stream temperature data from other southeastern streams for broader analyses
Learning Objectives: The participant will: gain experience in statistically analyzing a large dataset; learn about integrating physical with biological data; improve writing skills; and have an opportunity to help design future studies (including across all southeastern Experimental Forests) or conduct additional hydrologic modeling. The participant could potentially be lead or junior author on at least four publications, each addressing one of the following objectives:
Develop analytical solutions to stream temperature data challenges, especially periodic burial of temperature loggers, on the Gulf Coastal Plain.
Relate stream temperatures to physical processes (e.g., water impoundment) and model relationships between air and stream temperatures to facilitate extrapolations of stream temperature data to years lacking recorded water temperature data.
Relate distributions of Yazoo and Yoknapatawpha darters to stream temperatures.
Explore temperature in relation to warmwater fish and crayfish community metrics and identify fish or crayfish species with distributions possibly limited by temperature.
Professional development opportunities
The participant will have the opportunity to author or co-author several peer-reviewed scientific papers using existing data.
They will network with aquatic ecologists, fisheries biologists, hydrologists and others in the SRS as well as in other FS research stations.
They will have a platform to demonstrate quantitative skills and to refine communication skills.
They will have the opportunity to present results as professional society meetings, if travel funds can be secured.