BRYAN EATON/Staff Photo. Justin Lesser, a Ph.D student, left, and Hillary Sullivan a research assistant with the Woods Hole Oceanographic Institute, show grasses that are submerged in a tributary to the Rowley River. The grasses can survive underwater for a length of time, but if the oceans rise, the amount of these grasses could dwindle as they do need time in the air.

190515BEAmarshRowleyWoodsHoleLesserSullivanriver