http://vocab.lternet.edu/vocab/vocab/http://vocab.lternet.edu/vocab/vocab/skos/278lakes http://vocab.lternet.edu/vocab/vocab/skos/278 aquatic ecosystems BT http://vocab.lternet.edu/vocab/vocab/skos/278 freshwater RT http://vocab.lternet.edu/vocab/vocab/skos/278 playa RT http://vocab.lternet.edu/vocab/vocab/skos/278 limnology RT http://vocab.lternet.edu/vocab/vocab/skos/278 lake level RT http://vocab.lternet.edu/vocab/vocab/skos/278 plankton RT http://vocab.lternet.edu/vocab/vocab/skos/278 ponds RT http://vocab.lternet.edu/vocab/vocab/skos/278 lake UF