Small-flowered lipocarpha (Lipocarpha micrantha) COSEWIC assessment and status report: chapter 7
POPULATION SIZES AND TRENDS
The Missisquoi Beach, Quebec, population was discovered in 1953. It was again documented in each of 1955, 1956, and 1957. It could not be relocated in 1989, and is presumed to be extirpated (Labrecque, pers. commun. 2001).
The Holiday Beach, Ontario, population was discovered in 1984. 15 plants were found at that time (Oldham and Crins, 1988). The population was relocated in 1987 (Sabourin et al. 1992, Reznicek pers. commun., 2001) The area was searched in August and September of 2001 but no plants were located. Habitat degradation noted above has resulted in the extirpation of Lipocarpha micrantha from this location.
The Sable Island location in Northwest Ontario was discovered in 1995, and several thousand plants were noted at the time (Oldham, pers. commun., 2001). The 2001 surveys documented approximately 1800 plants. Detailed data was collected on the population in 2001. In future this information can be used to assess better the long-term trends.
The Pound Net Bay location in Northwest Ontario was discovered in 2000. At that time 75 plants were noted. The entire site was under water in 2001, and no plants were located. As discussed under biology above, this does not indicate that the species has been extirpated from this location.
Between 30,000 and 50,000 plants were located at the Lake Osoyoos, British Columbia location in 2001. This population was first documented in 1982, and has been surveyed several times since (Donvan, pers. commun. 2001). The 2001 survey showed the highest number of plants. The high number is attributed to excellent growing conditions this season, and also to the higher search intensity in 2001.
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