http://vocab.lternet.edu/vocab/vocab/http://vocab.lternet.edu/vocab/vocab/skos/701seawater http://vocab.lternet.edu/vocab/vocab/skos/701 water BT http://vocab.lternet.edu/vocab/vocab/skos/701 substrates BT http://vocab.lternet.edu/vocab/vocab/skos/701 plankton RT http://vocab.lternet.edu/vocab/vocab/skos/701 salt water UF