Figure 4 - uploaded by Susan Panjabi
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Distribution of Parnassia kotzebuei in relation to lands managed by the USDA Forest Service, Rocky Mountain Region.
Source publication
ACKNOWLEDGMENTS This research was facilitated by the helpfulness and generosity of many people, particularly Beverly Baker, Walt Fertig, Bonnie Heidel, Ken Houston, William Jennings, Tass Kelso, Nan Lederer, Peggy Lyon, Steve Olson, John Proctor, John Vorhis, and Loraine Yeatts. Their interest in the project and time spent answering questions were...
Contexts in source publication
Context 1
... kotzebuei is a peripheral species within Region 2, known from high elevation areas in Wyoming and Colorado (Figure 4). Habitat for P. kotzebuei in Region 2 is discontinuous on the landscape, so the species' distribution is patchy (Heidel and Laursen 2002). ...
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... occurrences in Wyoming are separated by almost 300 miles from the closest occurrences in Colorado. Some of the occurrences in Region 2 are close to other occurrences, and others are widely disjunct (Figure 4). Additional occurrences are likely to be discovered with further inventory. ...
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... distribution of Parnassia kotzebuei in Region 2 is limited to National Forest System, National Park Service, and private land (Figure 4). In Wyoming within Region 2, P. kotzebuei is known from the Shoshone and Bighorn national forests. ...
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... degree of connectedness among populations in Region 2 is not known, but current knowledge of the distribution suggests that many of the occurrences are genetically isolated from each other. Known populations within Region 2 are separated by approximately one to several hundred miles (Figure 4). The occurrences in Wyoming are almost 300 miles from the closest occurrences in Colorado. ...
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... degree of connectedness among occurrences in Region 2 is not known, but current knowledge of the distribution suggests that many occurrences are genetically isolated from each other. Known occurrences within Region 2 are separated by 1 to 300 miles (Figure 4; see also the Demography section). Gene flow among occurrences in Region 2 is probably rare. ...
Citations
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.
