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= Patricia Bradt = Dr. Patricia "Pat" Bradt is the Donna and David Long Professor of Environmental Science at Muhlenberg College. Dr. Bradt studies macroinvertebrates.

Career
Dr. Patricia "Pat" Bradt has been a professor at Muhlenberg College in Allentown, PA since 1996, where she teaches environmental science classes and studies aquatic macroinvertebrates. She received a bachelor of science degree in zoology from Cornell and a master's and PhD in Biology at Lehigh University. Dr. Bradt formerly worked as a Biologist at Lehigh University, with the title principle research scientist for the Environmental Studies Center. She has run workshops for the Pocono Environmental Education Center to educate teachers on acid rain impacts and solutions, as well as presented at the Bethlehem YWCA's Great Decisions series, entitled "Planet Earth: Dying Species: Disappearing Habitats". Dr. Bradt is a member of Citizens against Toxic Substances.

Research
Dr. Bradt is considered an authority on acid rain. She studied the effect of acid rain on lakes in the Pocono region on Pennsylvania over several decades. This research was funded in part by PP&L and the Living Lakes Inc. organization. She studied the impact of liming (adding limestone to the water) lakes, offsetting the lakes acidity. Specifically she studied two 50-acre lakes in Pike County, White Deer Lake and Bruce Lake. Bruce Lake was left alone but the nearby White Deer Lake was treated with 100 tons of limestone .The limestone at White Deer Lake countered acidity for over 2 years, after which 15 more tons of limestone was added. Dr. Bradt noticed a decline in acid-sensitive organisms in the untreated Bruce Lake, but in the limestone treated White Deer Lake, these same organisms increased.

Papers

Stability and Resilience in Benthic Macroinvertebrate Assemblages: Impact of Physical Disturbance over Twenty-Five Years. Hydrobiologia. This paper compared 1970s stream invertebrates to those in the same stream in the 1990s.