About: http://webisa.webdatacommons.org/187285817

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Some species such as oysters and mollusks have been used as indicator species, with any decline in their numbers indicating the ecosystem is under stress.
http://www.w3.org/ns/prov#wasQuotedFrom	newworldencyclopedia.org