Primarily a Canadian species. In Canada, known from British Columbia (S2?), Alberta (S3?), Saskatchewan (S1), and Manitoba (S1?) (current ranks as of July 2016). About 25 disjunct populations occur in the U.S. (in Iowa and Minnesota); these are believed to be relics of Pleistocene vegetation.
As identified by Hutson (1981), Morley (1978) and Smith (1981), threats to this particular species include:
Direct loss of habitat due to urban expansion has been and continues to be a threat to this species. An indirect decrease in habitat quality fro
This majority of populations of this species can be found primarily in Canada, where it not listed as threatened or endangered. In the United States a disjunct cluster of populations, considered to be glacial relicts from the last ice age, are much more rare. In fact, there are around eight locations in Iowa and one in Minnesota with seven small populations for a total of around 25 populations in the United States, none of which are large (Scwartz 1985, Coffin and Pfannmuller 1988, NatureServe 2001).
Schwartz (1985) used starch gel electrophoresis to assess genetic variability in and among five Iowa populations, and found it to be extremely low.
Packer (1963) used a number of methods, including morphology measurements, chromosome count, and geographical distribution, and chromosome count to establish the taxonomy of Chrysosplenium iowense among 2 other species of Chrysosplenium with overlapping range.
Protection of land in and around where populations occur is necessary to reduce the threat of habitat alteration or destruction
Populations should be monitored to assess health and make predictions about long-term viability
Further research in reproductive biology needs to be conducted
Further evaluation of genetic diversity within and among populations, using different techniques and incorporating more populations, especially those in Minnesota and Canada, needs to be initiated to guide potential restoration or introduction work.
Germination and propagation protocols need to be established to make restoration or introduction work possible.
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