scholarly journals Status of woodland caribou in Ontario: 1996

Rangifer ◽  
1998 ◽  
Vol 18 (5) ◽  
pp. 99 ◽  
Author(s):  
Harold G. Cumming
Keyword(s):  
Survey Methods ◽  
Lake Superior ◽  
Hudson Bay ◽  
Woodland Caribou ◽  
Habitat Types ◽  
Isolated Populations ◽  
Hudson Bay Lowlands ◽  
North East ◽  
Transitional Forest ◽  
Minimum Numbers

Over 20 000 woodland caribou were reported in Ontario during 1966, the highest figure ever published. Photographic counts of the Pen Islands herd, bordering Manitoba, have shown constant increases from 2300 in 1979 to 10 800 in 1994. Elsewhere in Ontario, estimates have been declining, from 13 000 in 1965 to 11 000 in 1989 to under 10 000 in 1996, a trend that may or may not be real because of differing survey methods. On the Hudson Bay Lowlands (excluding the Pen Islands caribou) 8600 were reported in 1965, 7200 in 1989, 5500 in 1996, an apparent decline. The transitional forest populations has remained stable. Estimated caribou numbers inhabiting the true boreal forest have dropped from nearly 4000 in 1965 to 2700 in 1996, but this decrease was not confirmed by careful within-district breakdowns of sub-populations by habitat types and may be an artifact of classification from districts to regions. The sharpest decrease was reported for the Central Region, north east of Lake Superior, where estimates dropped from 500 in 1965 to 475 in 1989 and to 68 in 1996. Individual caribou bands approach recognized minimum numbers for isolated populations, and even totals by sub-population remain low: over 1300 in commercial forests, about 500 in potentially commercial forests, and 8-900 in parks. Due to small numbers in widely dispersed band-locations, the potential for human disturbance affecting these forest dwelling caribou is substantial.

Lichens on the Hudson Bay Lowlands: a long-term survey in Wapusk National Park, Manitoba

2016 ◽  
Vol 48 (5) ◽  
pp. 581-592 ◽  
Author(s):  
Michele D. PIERCEY-NORMORE ◽  
Irwin M. BRODO ◽  
Chris DEDUKE
Keyword(s):  
Species Diversity ◽  
National Park ◽  
Hudson Bay ◽  
Beach Ridge ◽  
Habitat Types ◽  
Hudson Bay Lowlands ◽  
Coastal Beach ◽  
Physiographic Regions ◽  
Unique Species

AbstractWapusk National Park is part of the Hudson Bay Lowlands in Manitoba and covers 11 475 km2. Lichen surveys were initiated in 2002 but none have reported all species incorporating broad habitat types or a baseline on which to make management decisions. The objectives of this study were: 1) to determine species diversity, including species richness and evenness of the lichens present; 2) to explore species distributions; and 3) to compare lichen growth form and substratum relationships among physiographic regions. Fifty-six locations in four habitat types (physiographic regions: open coastal beach ridge, forested coastal beach ridge, boreal transition forest, and peat plateau bog) and three burned locations were visited over nine years and specimens were collected at each location. A total of 276 species and subspecies were collected. One species is new to Canada (Buellia uberior Anzi) and ten species are new to Manitoba. Species diversity, evenness, and richness were highest in the coastal beach ridge. The open coastal beach ridge, boreal transition forest, and peat plateau bogs formed separate clusters in the non-metric multidimensional scaling (NMS) but the forested coastal beach ridge overlapped with the open coastal beach ridge. Unique species in each region may serve as indicators to monitor long-term changes. While the coastal beach ridge facilitates travel along the coast, it also represents the region with the highest need for intervention to conserve species diversity.

scholarly journals Recent changes in summer distribution and numbers of migratory caribou on the southern Hudson Bay coast

Rangifer ◽  
2012 ◽  
pp. 269-276 ◽  
Author(s):  
Kenneth F. Abraham ◽  
Bruce A. Pond ◽  
Susan M. Tully ◽  
Vicki Trim ◽  
Daryll Hedman ◽  
...  
Keyword(s):  
Satellite Telemetry ◽  
Coastal Region ◽  
Hudson Bay ◽  
Woodland Caribou ◽  
Habitat Analysis ◽  
Genetic Sampling ◽  
The Status ◽  
Summer Range ◽  
Summer Distribution ◽  
Minimum Numbers

The status of migratory woodland caribou inhabiting the coastal region in southern Hudson Bay is dynamic. The Pen Islands Herd within that region was defined in the 1990s, but opportunistic observations between 1999 and 2007 suggested that its status had significantly changed since the late 1980s and early 1990s. We undertook systematic surveys from the Hayes River, MB, to the Lakitusaki River, ON, in 2008 and 2009 to determine current distribution and minimum numbers of woodland caribou on the southern Hudson Bay coast from the Hayes River, Manitoba, to the Lakitusaki River, Ontario. We documented a significant change in summer distribution during the historical peak aggregation period (7-15 July) compared to the 1990s. In 2008 and 2009, respectively, we tallied 3529 and 3304 animals; however, fewer than 180 caribou were observed each year in the Pen Islands Herd’s former summer range where over 10 798 caribou were observed during a systematic survey in 1994. Over 80% of caribou were in the Cape Henrietta Maria area of Ontario. Calf proportions in herds varied from 8% of animals in the west to 20% in the east. Our 2008 and 2009 systematic surveys were focused on the immediate coast, but one exploratory flight inland suggested that more caribou may be inland than had been observed in the 1980s-1990s. The causes of change in the numbers and distribution in the coastal Hudson Bay Lowlands and the association of current caribou with the formerly large Pen Islands Herd may be difficult to determine because of gaps in monitoring, but satellite telemetry, genetic sampling, remote sensing, habitat analysis, and aboriginal knowledge are all being used to pursue answers.

scholarly journals Seasonal resource selection of woodland caribou (Rangifer tarandus caribou) across a gradient of anthropogenic disturbance

2016 ◽  
Vol 94 (2) ◽  
pp. 79-93 ◽  
Author(s):  
Megan L. Hornseth ◽  
Robert S. Rempel
Keyword(s):  
Anthropogenic Disturbance ◽  
Resource Selection ◽  
Rangifer Tarandus ◽  
The Other ◽  
Hudson Bay ◽  
Rangifer Tarandus Caribou ◽  
Woodland Caribou ◽  
Selection Probability ◽  
Hudson Bay Lowlands ◽  
Selection Of

Resource selection functions are useful tools for land-use planning, especially for wide-ranging species with sensitivity to anthropogenic disturbance. We evaluated five a priori hypotheses describing seasonal habitat selection of woodland caribou (Rangifer tarandus caribou (Gmelin, 1788)) across three regions in northern Ontario. Two regions were Boreal Shield dominated, one area with relatively high anthropogenic disturbance (due to commercial forestry) and the other with relatively low anthropogenic disturbance. The final region was located on the wetland-dominated Hudson Bay Lowlands. Each region encompassed two caribou management ranges: one was used for model development and the other for model evaluation. We developed seasonal resource selection probability functions using seasonal utilization distributions and isopleths derived from GPS collar data (from 212 caribou) to identify high- and low-use areas. We explored selection across five spatial scales; selection patterns were strongest at the 10 000 ha scale. We found temporal and spatial variations in all environmental predictors across ranges and seasons, especially in the Hudson Bay Lowlands. Our results consistently supported the integrated global model (with common variables but range-specific coefficients) where caribou habitat use is related to minimizing apparent competition with moose (Alces alces (L., 1758)) while avoiding disturbed areas, and utilizing areas with adequate forage.

Constraining the age of the last interglacial–glacial transition in the Hudson Bay lowlands (Canada) using U–Th dating of buried wood

2012 ◽  
Vol 7 ◽  
pp. 37-47 ◽  
Author(s):  
G. Allard ◽  
M. Roy ◽  
B. Ghaleb ◽  
P.J.H. Richard ◽  
A.C. Larouche ◽  
...  
Keyword(s):  
Hudson Bay ◽  
Last Interglacial ◽  
Hudson Bay Lowlands

scholarly journals Bird trends from long-term observation data at sites in the Hudson Bay Lowlands

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Rodney W. Brook ◽  
Lisa A. Pollock ◽  
Kenneth F. Abraham ◽  
Glen S. Brown
Keyword(s):  
Hudson Bay ◽  
Observation Data ◽  
Hudson Bay Lowlands ◽  
Long Term Observation

scholarly journals Late Pleistocene chronology, palaeoecology and stratigraphy at a suite of sites along the Albany River, Hudson Bay Lowlands, Canada

2018 ◽  
Vol 492 ◽  
pp. 50-63 ◽  
Author(s):  
April S. Dalton ◽  
Sarah A. Finkelstein ◽  
Peter J. Barnett ◽  
Minna Väliranta ◽  
Steven L. Forman
Keyword(s):  
Late Pleistocene ◽  
Hudson Bay ◽  
Hudson Bay Lowlands

Because of previous isolated reports of swimmer’s itch at the stage 1 lake, periodic surveys by sweep netting commenced in July 1990. For each of six localities covering three distinct habitat types (open bays within the lake, along the margins of permanent creeks, temporary ponds), 1 m quadrats containing all vegetation types were scoured for snails. Austropeplea snails were not present in the lake proper until February 1991, but in November 1990 they were first located in ponds along the north-east, east and south-western shorelines. Egg masses were often found attached to the undersides of nardoo (Marsilea mutica) and sometimes wrapped around the stalks and ventral surfaces of the water lily, Nymphaea gigantea. Thus its absence from the lake was attributed to the lack of established vegetation in the stage 2A lake, and from this we developed a working hypothesis that host snails were possibly vegetation-specific. Thus to facilitate recreational use, control of infected Austropeplea could be achieved by simply clearing the appropriate water plant. By July to August 1991, however, schistosome-infected Austropeplea were collected from various types of vegetation along the margins of Ross River, close to the lake. A few Amerianna and Gyraulus gilberti were found in Ti-Tree Bay contiguous with Big Bay and Round Island, which were still negative for snails. By February 1992, planorbids were present in all three habitat types, with Austropeplea in two, i.e. ponds and creeks around the lake. Until 1993, 2,365 snails were dissected to detect both patent and pre-patent Trichobilharzia infection. Four different species of snails were identified, size classed according to shell length or width using vernier calipers. Snails were crushed on a microscope slide or in a Petri dish with a few drops of water under a warm light. A heavy infection of cercariae is evident to the naked eye, but any worm-like animals were removed on to another slide, stained with two to three drops of 0.1 per cent neutral red dye, covered with a coverslip and examined microscopically. Schistosome cercariae are distinctive with their eye spots, forked tail and presence of oral and ventral suckers (see Figure 9.4). Schistosomes were recovered from 4.5 per cent and 1.7 per cent of Austropeplea and Gyraulus gilberti snails, but not from Amerianna nor Thiara. In terms of management solutions, several questions seemed paramount: • Which habitat types presented the greatest (and lowest) risk? • Which time of the year presented the greatest hazard? • Can certain indicators be used to predict infection? Statistical analysis of the presence and abundance of Austropeplea snails did not correlate with any particular vegetation type (Hurley et al. 1995) but was connected with vegetation generally. There was no clear-cut relationship with snail density and physicochemical parameters including temperature, biomass of periphyton or with percentage surface coverage. However, highest densities of Austropeplea lessoni (45/m and Amerianna

1998 ◽  
pp. 149-149
Keyword(s):  
Vegetation Type ◽  
Petri Dish ◽  
Neutral Red ◽  
Temporary Ponds ◽  
Habitat Types ◽  
Water Lily ◽  
Clear Cut ◽  
North East ◽  
The North ◽  
Stage 1
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