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Climate Change Institute

Mario Williams

M.S. Student/Teaching Assistant

Mario Williams

Contact Information


I am broadly interested in paleoecology and historical ecology. I use geohistorical data to learn about past environmental conditions and biotic interactions, in order to inform our understanding of modern environmental change and recent shifts in biological communities. Multi-decadal studies and those that investigate phenomena over much longer timescales (centuries to millenia) allow us to identify long-term patterns, detect anomalies, and interpret present-day observations within their appropriate historical, spatial, geological and ecological contexts. Consequently, paleoecological studies are increasingly important for deciphering the rates of change, ecological impacts and biotic responses that define the most critical global environmental problems of the 21st century, including climate change, biodiversity loss, biological invasions and eutrophication of waterbodies.                  

Research interests

Past research involved the study of the evolution of molluscan life history traits (egg size) in the northern Gulf of Mexico. Specifically, I investigated the effect of coastal eutrophication on marine bivalve communities along an east-west gradient in the Gulf of Mexico.


  • Harnik, Paul G., Torstenson, Morgan L., and Williams, Mario A. 2016. Assessing the effects of anthropogenic eutrophication using live-dead agreement in molluscan life history traits. Geological Society of America Annual Meeting, Denver, Colorado, Abstracts with Programs. Vol. 48, No. 7.

    For more information: Read abstract

  • Williams, Mario A. and Harnik, Paul G. 2015. Egg size evolution in response to historical regime shifts in the Gulf of Mexico. Geological Society of America Annual Meeting, Baltimore, Maryland, Abstracts with Programs. Vol. 47, No. 7, p.140.

    For more information: Read abstract


B.A. Franklin & Marshall College, 2016

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