Susan P. Harrison

Early life and education Harrison is from Sonoma, California. She studied zoology at University of California, Davis and graduated in 1983. Harrison switched to ecology for her graduate studies, and earned a master's degree in 1986. Her doctoral work considered the Edith's checkerspot butterfly and was supervised by Paul R. Ehrlich and Richard Karban.

Research and career After her PhD, Harrison was a postdoctoral fellow at Imperial College London, where she worked at Silwood Park. Harrison was appointed to the faculty at University of California, Davis in 1991. She studied metapopulations, which has previously been explained as existing between colonisation and extinction. Harrison demonstrated that the formation of metapopulations is more complicated; and can be patchy, non-equilibrium and geographical.

She works on both the Californian grasslands and Oregon forest understories. She found that these regions had suffered from climate change, in particular the warmer, drier climate has resulted in a decline in plant community diversity. Species that had functional traits including drought intolerance are particularly vulnerable. In situations where nutrients are the most limiting resource, climate has less of an impact. These wildflowers keep part of their seeds dormant in seed banks underground, which they can disperse when the weather is appropriate. Wildflowers that are more resilient to drought have larger underground seed banks. She has also studied California's wildfires near the Stebbins Cold Canyon Reserve. Almost half of the grasslands studied by Harrison were impacted by the 2015 California wildfires.

In 2018, Harrison was elected to the National Academy of Sciences. She serves on the scientific advisory board of the Siskiyou County Field Institute. She is a member of the editorial board of the Proceedings of the Royal Society.

Awards and honours

1997 International Recognition of Professional Excellence Prize 2005 American Society of Naturalists Vice-President 2013 Fellow of the Ecological Society of America 2018 Elected a member of the National Academy of Sciences (NAS)

Selected works