Parnassia palustris population differences in three Korean habitat types
2017
Jeong, Tae Sil | Kim, Jae Geun
Parnassia palustris is an herbaceous perennial with a circumpolar distribution. In Korea it is found in three habitat types: low-altitude high-latitude habitat (LH), mountain stream habitat (MS), and high-altitude low-latitude habitat (HL). This classification is based on soil physicochemical properties and species composition. To find the best habitat type for the maintenance of P. palustris populations, we surveyed vegetation and environmental properties in the three habitat types. All three habitat types had moist soil with low N content. LH had a temperate climate and shallow calcareous soil with a high pH. MS had a thin soil layer with high Ca²⁺ content, a high pH and heavy disturbance. HL had a low temperature and deep soil layer with a low pH. Co-occurring species in HL were strong competitors compared to co-occurring species in LH and MS. Population increase in MS was higher than in LH and HL. Reproductive traits were also higher in MS than in LH and HL. Of the three habitat types, MS is regarded as the best for P. palustris. We suggest maintaining P. palustris habitats with a sufficient water supply and weak competition to sustain the population successfully. This may further restore the MS habitat to expand the distribution of this species. Our study also provides information relevant to the conservation and restoration of the MS habitat for vulnerable calcicole or early successional species, like P. palustris.
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