An ecologist is someone who studies the environment. They study the things that affect the environment, and they try to figure out how to protect it.
He is an ecologist, which is why he is so interested in the environment.
She is an ecologist, which is why she is so interested in the effects of the environment on people.
noun
a biologist who studies the relation between organisms and their environment
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Mostafa Abbas Saleh is an Egyptian ecologist and herpetologist.
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In 1955 he won the Eminent Ecologist Award.
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The Foundation's President is the ecologist and filmmaker Michael Tobias.
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Ecologists study the energy economies of natural systems.
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He became one of the first ecologist of Canada.
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He's probably the most prominent urban ecologist in the UK.
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The first minister of this ministry is the ecologist Antonio Brack Egg.
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I am a freshwater ecologist out of the North West of the United States.
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The term ecologist has been in use since the end of the 19th century.
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Ecologist Gerald Waldron made the Leamington find while walking along the beach.