@prefix n9j: <http://data.loterre.fr/ark:/67375/N9J> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

n9j:-ZF6Z72N4-L
  skos:prefLabel "seasons"@en ;
  a skos:Concept ;
  skos:broader n9j:-RPTX0QZG-9 .

n9j:-QVKK0472-D
  skos:prefLabel "biological clocks"@en ;
  a skos:Concept ;
  skos:broader n9j:-RPTX0QZG-9 .

n9j:-RPTX0QZG-9
  skos:inScheme n9j: ;
  owl:sameAs <https://concepts.sagepub.com/social-science/concept/periodicity> ;
  skos:definition "Periodic variation is a trademark of time that has long mystified ordinary people, inspired philosophers, and frustrated mathematicians. Through thousands of years, famines have alternated with prosperity, war with peace, ice ages with warming trends, among others, in a way that hinted at the existence of cycles. [Source: The SAGE Encyclopedia of Social Science Research Methods; Periodicity]"@en ;
  skos:broader n9j:-QX4TTLX0-M ;
  skos:narrower n9j:-F364Q9B7-F, n9j:-QVKK0472-D, n9j:-ZF6Z72N4-L ;
  a skos:Concept ;
  skos:prefLabel "periodicity"@en ;
  skos:exactMatch <https://id.nlm.nih.gov/mesh/D010507.html> .

n9j: a skos:ConceptScheme .
n9j:-QX4TTLX0-M
  skos:prefLabel "time (physics)"@en ;
  a skos:Concept ;
  skos:narrower n9j:-RPTX0QZG-9 .

n9j:-F364Q9B7-F
  skos:prefLabel "circadian rhythm"@en ;
  a skos:Concept ;
  skos:broader n9j:-RPTX0QZG-9 .

n9j:-concepts
  a isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member n9j:-RPTX0QZG-9 .