Title Geographical Distribution Patterns of the Apiaceae in Sakhalin and the Kuril lslands Author(s) Takahashi, Hideki Citation 北海道大学総合博物館研究報告, 5, 1-34 Issue Date 2009-03 Doc URL http://hdl.handle.net/2115/47871 Type bulletin (article) Note Biodiversity and Biogeography of the Kuril Islands and Sakhalin vol.3 File Information v. 3-1.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP Biodiversity and Biogeography ofthe Kuril Islands and Sakhalin (2009) 3,1-34. Geographical Distribution Patterns of the Apiaceae in Sakhalin and the Kurillslands Hideki Takahashi The Hokkaido University Museum, Sapporo 060-0810, Japan E-mail:
[email protected] Abstract Thirty species of the Apiaceae in Sakhalin (S) and the Kuril Islands (K) were examined on 1,592 specimens deposited in the main Japanese herbaria: KYO, SAPS, SAPT, TI and TNS. The geographical distribution of 27 of these 30 species was determined quantitatively. Ligusticum scoticum (number of specimens: S+K = 190) and Tilingia ajanensis (S+K = 171) represent the two most abundant species of the Apiaceae in these regions. The Sakhalin-Kurils index (S-K index: S-K/S+K) of L. scoticum showed a somewhat negative numerical value, -0.11, and that of T. ajanensis showed an especially negative value, -0.43, meaning a clear distribution bias of the latter species toward the Kurils. However, many Apiaceae species are characterized by positive S-K indices, which means generally a distribution bias toward Sakhalin. An extreme high positive S-K index (+ 1.00), which means the presence in Sakhalin but the absence in the Kurils, is found in the following six species: Angelica edulis (but only S+K = 1), A.