@prefix dct: . @prefix ns1: . @prefix ns2: . @prefix ns3: . @prefix rdfs: . @prefix skos: . a skos:Concept ; dct:created "2019-01-14" ; dct:modified "2019-01-14" ; ns3:hasProfile ; ns1:status ; rdfs:seeAlso ; skos:definition "Production of carbon means the production of biomass expressed as the mass of carbon which it contains. Net primary production is the excess of gross primary production (rate of synthesis of biomass from inorganic precursors) by autotrophs (producers)"@en ; skos:exactMatch ; skos:prefLabel "net primary mole productivity of biomass expressed as carbon by diatoms"@en ; ns2:hadPrimarySource .