PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Typically, algae blooms are caused by an oxygen deficient water column, excessive nutrients loads i.e. nitrogen and phosphorous runoff from lawns, agricultural land, septic systems etc., biodegradable materials i.e. dead leaves and plant material, fecal matter from fish, frogs, birds and other aquatic life and sunlight.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ecochem.com