Biodiversity Benefits (IMAGE) University of New Mexico Caption Cattle also use Lake Victoria as a water source and can transmit a different parasite into the Biomphalaria snails, which can actually reduce the rate of S. mansoni in the snails. This aspect of biodiversity has a positive impact on the region. Credit Eric Loker/UNM Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.