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Dr. Joseph H. Sullivan

Professor and Associate Dean

Associate Dean

0108 Symons Hall 0108 Symons Hall 7998 Regents Drive College Park, MD 20742-5551


Plant Science & Landscape Architecture 2102 Plant Sciences Building 4291 Fieldhouse Drive College Park, MD 20742


  • forest ecology
  • ultraviolet radiation
  • Ecophysiology
  • plant physiology
  • Environmental Science


  • Research centers on the responses of plants to various forms of environmental stress - both natural and anthropogenic.
  • Physiological mechanisms that enable plants to exist in a wide range of environmental conditions and how human activities such as stratospheric ozone depletion, global climate change or urbanization may impact plant, agricultural or ecosystem productivity or ecosystem structure and functioning.
  • Environmental Stress
  • UV-B Radiation
  • Global Climate Change
  • Ecosystem Services
  • Plant Physiological Ecology
  • Urban forest Ecology

Our laboratory conducts research on the physiological responses of plants to environmental and biotic stresses. A primary research topic is attempting to understand the physiological and ecological responses of plants to ultraviolet-B radiation and other elements of global climate change. A more recent program within our group has a focus on urban ecosystems including the impacts of human activities and introduced species on our urban forests.