About: http://webisa.webdatacommons.org/247339751

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	Such threats as nutrient enrichment, sedimentation, exotic species invasion, water pollution, and development pose serious management concerns for these parks.
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov