In this episode of Beyond the Frontier, we talk with Thomas Whittier about his recent Frontiers paper, “A calcium-based invasion risk assessment for zebra and quagga mussels (Dreissena spp)”. Zebra and quagga mussels are notorious freshwater invasive species that require calcium to build their shells. As Mr. Whittier explains, areas of the US that have low concentrations of calcium in their freshwaters may therefore be resistant to invasion by these species.

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