title: [Study on spatial distribution pattern and seasonal distribution of Buthus martensii in yan'an].
abstract: OBJECTIVE
  To study population dynamics of Buthus martensii and its wild spatial distribution pattern in Yan'an.
  
  
  METHODS
  Every month, the 1st, 10th and 20th day were designated to collect Buthus martensii samples and count on the collection by using expansion pattern target, Taylor power law and Lwao m-x regression analysis.
  
  
  RESULTS
  Taylor power law regression equation was Ig S2 = 1.6671 lg x + 0.1554; Lwao m-x regression equation was m = 1.3179 + 1.5133x. The spatial distribution pattern of Buthus martensii was negative binomial distribution and its population fluctuation curve in the wild presented a single peak.
  
  
  CONCLUSIONS
  Spatial pattern of Buthus martensii in Yan'an is aggregated distribution which based on individual group, and the higher density,the greater aggregation degree.
authors.forename: Shi-cai
authors.initials: SC
authors.lastname: Xu
authors.forename: Xue-jian
authors.initials: XJ
authors.lastname: Shen
authors.forename: Xiu-kun
authors.initials: XK
authors.lastname: Han
authors.forename: Dan
authors.initials: D
authors.lastname: Chen
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D002681:China; D002980:Climate; D003247:Conservation of Natural Resources; D017753:Ecosystem; D008433:Mathematics; D011156:Population Density; D011157:Population Dynamics; D012605:Scorpions / Q000254:growth & development* / Q000502:physiology; D012621:Seasons