Many of Collen’s colleagues have paid tribute to him on Twitter. Dani Rabaiotti, an author and graduate student at the Zoological Society of London, calls Collen “a brilliant scientist and all round lovely person,” adding, “He was a great mentor to many + his advice helped shape the path I am on now.”
Collen’s lab focused on changes in biodiversity, how species respond to environmental threats, ways to reduce uncertainty in macroecology and biodiversity, and models of the projected ecological effects of different policies.
While an undergraduate at Imperial College London, Collen did a stint as a research assistant on a carnivore research project in Kenya. He went on to earn a master’s degree at the University of York and then a PhD from the Institute of Zoology and Imperial College London, according to his lab’s website. He continued his research as a postdoc and, later, a research fellow at the Institute of Zoology, then started his own lab at University College London in 2013.
“Ben was a great conservation scientist but he was also a wonderful person and a central figure in our [Centre for Environment and Biodiversity] community,” according to a memorial written on Collen’s department website.
The Zoological Society of London selected Collen for its 2014 Marsh Award for Conservation Biology. He was also an Honorary Research Fellow for the United Nations Environment Programme World Conservation Monitoring Centre, and served as an editor for several journals. He was married to science writer Alanna Collen.