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Chaplin Lake (SK033)

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Chaplin Lake (SK033)

Chaplin, Saskatchewan

Latitude 50,365°N
Longitude 106,607°O
Altitude 668 - 671m
Superficie 171,41km²

Description du site

Chaplin Lake is situated in south central Saskatchewan, near the town of Chaplin. It is a large saline lake approximately 35 km in length and up to 10 km wide (after the Quill Lakes, it is the second largest saline lake in Canada). The lake is divided into four sections by a series of dykes and roads that were constructed as part of a sodium sulphate mine development on the north shore. Extensive marshes are located in the southern half of the lake. Water levels fluctuate considerably, with extensive mudflats becoming exposed during the late spring and summer; during some years the lake may become completely dry by mid-summer.

Oiseaux

Chaplin Lake supports tremendous numbers of shorebirds, especially during spring migration. One-day aerial surveys in 1987, 1993, and 1994 yielded estimates of 59,773, 73,359, and 55,127 respectively. For 1994, species peak numbers on Chaplin Lake provided a total count of 110,061. One of the most abundant species at this site is Sanderling; although a site specific number is unavailable, (estimates for Chaplin and Old Wives Lake were combined) the average number was 55,471 for both these lakes. This may represent as much as 30% of the estimated North American population. Large numbers of Baird's Sandpipers (29,862 in the spring of 1987 as much as 21% of the world's population), Semipalmated Sandpipers (30,404 in the spring of 1987 and 28,796 in the spring of 1994), and Stilt Sandpiper (4,349 in May, 1993, representing 4.3% of the global population) have also been recorded at Chaplin and Old Wives Lake. Other shorebirds that have been recorded in large numbers at Chaplin Lake include American Avocet (2,685 1994; over 4% of the estimated Canadian population), Red-necked Phalarope (7,755 1994), Wilsons Phalarope (7,100 1984, and 6,192 1994; both approximately 1% of the Canadian population).

Chaplin Lake also supports a significant breeding population of the nationally endangered and globally vulnerable Piping Plover. As many as 205 adults were recorded during the 1996 International Piping Plover Census (about 3.4% of the world's estimated population). Over a three-year period (1996-1998) an average of 169 breeding Piping Plovers were recorded. Burrowing Owls, another nationally endangered species, have also been recorded nesting in the grasslands surrounding the site.

Of additional ornithological interest is the presence of nesting Snowy Plovers in 1987 (2 pairs 1 female appeared to be incubating). Since 1987, this species has been reported on several occasions. This site is one of only three known breeding locations for Snowy Plover in Canada. Also, two species that are nationally vulnerable, the Ferruginous Hawk and the Long-billed Curlew, nest in the surrounding grasslands in small numbers.

Enjeux de conservation

Threats to the lake include cattle access to the Piping Plover beaches as well as vegetation encroachment. There have been some efforts to improve nesting habitat for Piping Plovers with gravel being spread on the shore during the winter of 1987-88. The entire west bay and Midtskogen Bay have been designated as critical Piping Plover habitat, along with portions of the east and south bays. Critical Piping Plover habitat is protected under the Provincial Wildlife Protection Act. Chaplin Lake, along with nearby Old Wives and Reed Lakes, was designated as a Western Hemisphere Shorebird Reserve Network (WHSRN) site for both staging shorebirds and endangered species.

Catégories ZICO Habitats Usages Menaces Potencielles ou Existantes Status de Protection
Pluvier siffleur
Nombre Année Saison
142017Printemps
302014Été
292014Printemps
13 - 192013Printemps
302012Été
142012Printemps
47 - 3592011Été
1052001Été
162000Été
51 - 791999Été
34 - 1731998Été
130 - 1691997Été
23 - 2051996Été
1541995Autre
291994Été
241993Été
1131991Été
841990Été
431988Été
571987Été
2071984Été
Bécasseau sanderling
Nombre Année Saison
4 500 - 5 8002016Été
4 8002016Printemps
3 5092014Été
3 0002014Printemps
17 1202013Été
4 5002013Printemps
3 0002012Été
3 500 - 15 0002003Printemps
2 5251998Été
3 0001996Été
52 9841994Printemps
51 0841993Printemps
51 6541987Printemps
Bécasseau de Baird
Nombre Année Saison
3 4391994Automne
1 5321993Printemps
29 8081987Printemps
Bécasseau semipalmé
Nombre Année Saison
28 7961994Printemps
9 3171993Printemps
30 4041987Printemps
Bécasseau maubèche
Nombre Année Saison
1 1221993Printemps
Bécasseau à échasses
Nombre Année Saison
7 0001999Printemps
2 9271994Printemps
4 3491993Printemps