The first thing Cynthia Boettner had to explain to me about the Silvio O. Conte National Fish and Wildlife Refuge is that the Refuge consists of  the 7.2 million acres of the Connecticut River Watershed that runs from the far reaches of New Hampshire, through Vermont, Massachusetts and Connecticut before it exits in Long Island Sound. That is an enormous charge and responsibility. As Boettner explained how she works to monitor, control and eradicate invasive plant…