1. Department of Biological Sciences, Duquesne University, Pittsburgh, Pennsylvania, USA;
2. Center for Environmental Research and Education, Duquesne University, Pittsburgh, Pennsylvania, USA;
3. Department of Geology and Environmental Science, University of Pittsburgh, Pittsburgh, Pennsylvania, USA;
4. RedHorse Environmental, Tionesta, Pennsylvania, USA;
5. Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania, USA