Coastal graphic descriptors
Decline in wetlands and beach and dune habitat, Atlantic Coast
This bar chart depicts the percent change in wetlands and beach and dune habitat at five sites along the New Brunswick coast from 1944 to 2001. An insert map shows the locations of these five sites along Northumberland Strait. All five sites show loss of beach and dune habitat and of wetlands habitat.
Each location is described in the following set of points:
- The greatest percent loss was at Cocagne with 40% of beach and dune habitat lost and 36% of wetlands habitat lost.
- Shediac had the second highest loss, with 32% of beach and dune habitat lost and 21% of wetlands habitat lost.
- Cape Jourimain lost 22% of its beach and dune habitat, and 28% of wetlands habitat.
- Aboiteau lost 12% of its beach and dune habitat and 27% of its wetlands habitat.
- The site with the lowest percent loss was Shemogue with 8% of beach and dune habitat lost and 5% of wetlands habitat lost.
Increase in development along Atlantic coasts
This bar graph shows the number of lot registrations within 2 kilometres of the Nova Scotia coastline. The graph shows approximately 1,000 lot registrations per decade before 1889 and each decade from 1889 to 1938. Beginning in 1939 the number of lot registrations begins to increase, reaching a peak greater than 75,000 lot registrations in the decade from 1989 to 1998. From 1999 to 2008 approximately 70,000 lots were registered.
Increase in water level in Charlottetown Harbour
This graph shows the increasing trend in water level in Charlottetown Harbour from 1911 to 2008. The water level fluctuated from year to year, but over the period of measurement it increased steadily from less than 1.5 metres above the reference level on land to just below 1.8 metres above the reference point. This is an increasing trend of 32 centimetres per century, or 3.2 millimetres per year.
Loss of salt marsh vegetation from snow goose foraging, Hudson Plains
This map shows areas with vegetation loss at La Pérouse Bay, Manitoba, part of Hudson Bay. Changes are shown over three time periods, from 1973 to 1984, from 1984 to 1993, and from 1993 to 2000. The greatest vegetation loss occurred in the first period, from 1973 to 1984, with extensive areas lost along both the eastern and western portions of the bay, stretching inland from the coast. Vegetation loss from 1984 to 1993 was scattered along the coast with a concentration at the head of the bay. Vegetation loss from 1993 to 2000 was less extensive than previous changes in vegetation loss, occurring primarily along the western portion of the bay. Over the entire period from 1973 to 2000, most of the coastal vegetation of La Pérouse Bay was lost. An inset map shows the location of La Perouse Bay, Manitoba on the western shore of Hudson Bay.
Mid continent lesser snow goose population
This line graph shows an overall increasing trend of the mid continent lesser snow goose population from 1970 to 2008. The size of the population fluctuated annually, but steadily increased from 770,000 in 1970 to a peak of 3,050,000 in 1998. Since then, there has been no apparent trend. The 2008 lesser snow goose population was 2,750,000.
Decline of eelgrass in James Bay
This bar graph displays the dry leaf biomass of eelgrass collected at one metre depth from Kakassituq Station in James Bay. Annual measures of biomass varied without an apparent pattern from 1988 to 1995, with values ranging from a low of approximately 280 gramsper square metre in 1990 to a high of approximately 550 grams per square metre in 1995. In 1999 and 2000, eelgrass biomass was minimal, with 18 grams per square metre in 1999 and 12 grams per square metre in 2000.
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