The study, published in the journalPLoS ONE, investigated the interaction between the crayfish and carp in Kenya's Lake Naivasha between 2001 and 2008.
The crayfish were introduced to the Lake in the 1970s and have adopted a central role in the food web for more than 30 years, yet the carp, introduced a little more than a decade ago, appear to have driven the crayfish away.
Lead author Dr Jonathan Grey from Queen Mary's School of Biological and Chemical Sciences said: "We first noticed the carp in our nets in 2003; by 2006 it was the dominant fish species in the Lake and at the end of our research in 2008, carp completely dominated the system.
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