Aquatic invasive species are a threat to the ADK region as they have the potential to negatively impact the aquatic ecosystems of Adirondack lakes. These species include plants which choke up beach fronts, mussels that eliminate phytoplankton on which native ecosystems depend, and fish with no native predators that take over ecosystems. As part of a cost-benefit analysis, you have been asked to estimate the damages from these invasive species. Describe, specifically, how you would use at least TWO different non-market valuation techniques to estimate the damages from invasive species in the Adirondacks.