WHOI biogeochemist Amanda Spivak (center) collects plant and sediment samples in Barstable Great Marsh with the help of research assistant Kelsey Gosselin (left) and MIT-WHOI Joint Program student Sheron Luk (right). Together with collaborators from the Cape Cod Mosquito Control Project, the U.S. Fish and Wildlife Service, the U.S. Geological Survey, Waquoit Bay National Estuarine…