Nancy Guttmann Slack (August 12, 1930 – December 21, 2022) was an American plant ecologist, bryologist, and historian of science.
Her Ph.D. thesis, entitled Species diversity and community structure in bryophytes,[6] won the Paul C. Lemon Award.
In 2012 Nancy G. Slack was the project director for an investigation resulting in the report Alpine Snowbed communities of Mt.
Washington and the monitoring of Populations of Rare Bryophytes and Lichens in relation to Future Climate Change Project.
[5] The Russell Sage College sponsors the Glen and Nancy Slack Endowed Award in the Sciences Fund for outstanding juniors or seniors in "biology, pre-medicine or biochemistry.