Snails - physiology, Animals, Brachyura - physiology, Ecosystem, Maine, Plants, Feeding Behavior - physiology, Communities, Habitats, Ecosystems, Crabs, Consumers, Plant communities, Shores, Mollusks, Ecology, Low flow, High flow, Groundwater movement, Recovery, Density, Ecosystem biology, Biological diversity, Crustaceans, Predators, Evolutionary biology, S...