J Lewis

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J Lewis

J Lewis

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Biography

Fordham University Lincoln Center - Classics

Professor at Fordham University
Higher Education
J.D.
Lewis
Bronx, New York
My research focuses primarily on community ecology and plant physiology. In particular, I am interested in the effects of human-induced changes in the environment, such as climate change, invasive organisms and urbanization, on individual plants, plant populations, community structure and ecosystem processes, and how these effects vary with plant age, phenology and size.

Experience

  • Duke University

    Instructor in Biology

    J worked at Duke University as a Instructor in Biology

  • U.S. Environmental Protection Agency

    National Research Council Resident Research Associate

    J worked at U.S. Environmental Protection Agency as a National Research Council Resident Research Associate

  • Fordham University

    Professor and Associate Chair

    My positions are in the Department of Biological Sciences at Fordham.

    As a bit of background about the department, the mission of the department is to create the physical and intellectual atmosphere that will enable our students, faculty and staff to achieve excellence in teaching and research. Our programs are designed to help foster a life-long curiosity about biology. More specifically, we help develop the intellectual and technical skills needed to pursue careers in biology and tackle major problems of the 21st Century, both locally and globally.

    The department offers B.A., B.S., M.S. and Ph.D. degrees in Biology. Graduate students can focus their studies in two areas of specialization - Cell/Molecular Biology and Ecology. We also offer a certificate program in Conservation Biology, and contribute to interdisciplinary programs in Environmental Science, Integrative Neuroscience and Urban Studies. We have approximately 300 upperclassmen in our B.A./B.S. program, and about 60 students in our graduate program.

  • University of Western Sydney

    Visiting Professor

    J worked at University of Western Sydney as a Visiting Professor

Education

  • Penn State University

    M.S.

    Ecology

  • Penn State University

    B.S.

    Biology, Ecology

  • Duke University

    Ph.D.

    Botany

  • Duke University

    Instructor in Biology



Publications

  • Variation in the Fitness Effects of Mutations with Population Density and Size in Escherichia coli

    PLOS One

    The fitness effects of mutations are context specific and depend on both external (e.g., environment) and internal (e.g., cellular stress, genetic background) factors. The influence of population size and density on fitness effects are unknown, despite the central role population size plays in the supply and fixation of mutations. We addressed this issue by comparing the fitness of 92 Keio strains ( Escherichia coli K12 single gene knockouts) at comparatively high (1.2×10 7 CFUs/mL) and low (2.5×10 2 CFUs/mL) densities, which also differed in population size (high: 1.2×10 8 ; low: 1.25×10 3 ). Twenty-eight gene deletions (30%) exhibited a fitness difference, ranging from 5 to 174% (median: 35%), between the high and low densities. Our analyses suggest this variation among gene deletions in fitness responses reflected in part both gene orientation and function, of the gene properties we examined (genomic position, length, orientation, and function). Although we could not determine the relative effects of population density and size, our results suggest fitness effects of mutations vary with these two factors, and this variation is gene-specific. Besides being a mechanism for density-dependent selection ( r - K selection), the dependence of fitness effects on

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CLCU 1

5(1)

  • Level:
  • Credit hours: 0

HIST 1210

5(1)

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  • Credit hours: 0

HSLU 1220

5(1)

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  • Credit hours: 0

HSLU 1400

5(1)

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  • Credit hours: 0

INTROLAT

5(1)

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  • Credit hours: 0

LATIN 1000

5(1)

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  • Credit hours: 0

LATININTR

5(1)

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LATINSECT

5(1)

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ROMAN 1

3.5(1)

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