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Mr. Lewis is one of the nation's foremost authorities on wetlands restoration and creation. A biology graduate of the University of Florida, with a master's degree in zoology from the University of South Florida, Mr. Lewis was a professor and chairman of the biology department at Hillsborough Community College before opening his first consulting firm, Mangrove Systems, Inc., in 1975. That company later became the environmental division of Proctor & Redfern, Inc. and Mr. Lewis established a new company, Lewis Environmental Services, in 1989.

An accomplished speaker and author of more than 50 scientific papers, Mr. Lewis has served on several key committees advising federal, state and local environmental managers. He has made invited scientific presentations worldwide, including New Guinea, Australia, France, Spain, Mexico and Colombia.

Mr. Lewis is a member of more than a dozen professional organizations, and is a Certified Environmental Professional, Professional Wetlands Scientist, and Certified Senior Ecologist.

Senior Consulting Ecologist

Dr. Marshall joined LES as a consulting senior ecologist in April 1996. Prior to his employment with LES he worked as a staff scientist at Mote Marine Laboratory in Sarasota, Florida, from 1991-1996. Dr. Marshall was awarded two research grants by the Department of Natural Resources to assess commercial fishery impacts on by-catch, seagrass meadows and habitat quality. In 1989, he was a Presidential Task Force Witness to oil damage to seagrass meadows in Panama. Dr. Marshall was invited by Governor Bob Martinez to review the U.S. Minerals Management Service Report on the impact of oil exploration and production on the Florida Continental Shelf in 1987. The Minerals Management Service funded an oil spill project in 1986 in which Dr. Marshall studied the effects of the spill on Thalassia meadow animal communities on the Caribbean coast of Panama. He was Scientist-in-Charge for the Bahia Las Minas Oil Spill Project at the Smithsonian Tropical Research Institute in the Republic of Panama. Dr. Marshall has made several presentations on the effects of oil spills on seagrass communities.

He recently completed projects in Colombia, Panama, and Nicaragua. In Panama Dr. Marshall inventoried seagrass meadows around the entrance to the Panama Canal as part of a study to determine how a canal widening project will affect marine communities. In Nicaragua Dr. Marshall surveyed seagrass meadows and fisheries around the Miskito Cays and within several large coastal lagoons. This work supports a project aimed at the establishment of a protected area for the Miskito Indians. In Colombia Dr. Marshall worked with scientists from the Instituto de Investigaciones Marinas de Punta de Betin to measure the impact on marine biodiversity of the loss of a large (125 mi2) mangrove forest.


Dr. Marshall has published ten scientific papers, most of which focus on the environmental impacts of oil spills.


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