Walking along the shore of Black Point Pond in Chilmark, Richard
Johnson of Sheriff's Meadow Foundation is nearly dwarfed by a
thick stand of 12-foot high reeds.

Also called phragmites, the reeds are an invasive species that have
formed a dense monoculture over what was once an open diverse habitat of
native pondshore plants. Dead reeds crunch beneath his boots, covering
the ground so virtually nothing else can grow through.