Description for map 4.6
Pressure on the Thousand Islands National Park: Area treated with herbicide, 1981 and 2011
The title of this map is Pressure on the Thousand Islands National Park: Area treated with herbicide, 1981 and 2011. It consists of two maps: one for 1981 and one for 2011. On this map, the darker the colour, the greater the number of hectares of area treated with herbicide for the census consolidated subdivisions (CCS). Category 1 is coloured dark purple and represents a number more than or equal to 25,000 hectares; it comprises 1 CCS in 1981 and 1 in 2011. Category 2 is coloured medium-dark purple and represents a number from 15,000 to less than 25,000 hectares; it comprises 1 CCS in 1981 and 6 in 2011. Category 3 is coloured medium purple and represents a number from 5,000 to less than 15,000 hectares; it comprises 9 CCS in 1981 and 9 in 2011. Category 4 is coloured mauve and represents a number from 2,000 to less than 5,000 hectares; it comprises 8 CCS in 1981 and 14 in 2011. Category 5 is coloured pale mauve and represents a number less than 2,000 hectares; it comprises 38 CCS in 1981 and 24 in 2011. Category 6 is coloured pale grey and indicates that data is not available; it comprises 3 CCS in 2011. The boundaries between the CCS are indicated with thin black lines. Water is coloured pale blue. Land areas outside of Canada are coloured pale grey. The international boundary is indicated with a thick grey line.
Note(s): The data are reported for the year preceding the census year.
Source(s): Francis, M. and J. Leggo, 2004, State of the Park Report 2004: St. Lawrence Islands National Park of Canada. ESRI, 2013, Tele Atlas North America. Statistics Canada, 2011, Boundary Files, Catalogue no. 92-160-X. Statistics Canada, Environment Accounts and Statistics Division, 2013, special tabulation of data from the 1981 and 2011 Censuses of Agriculture.
| Category | Number of hectares of area treated with herbicide, per CCS | Colour |
|---|---|---|
| 1 | ≥ 25,000 | Dark purple |
| 2 | 14,000 to < 25,000 | Medium-dark purple |
| 3 | 5,000 to < 14,000 | Medium purple |
| 4 | 2,000 to < 5,000 | Mauve |
| 5 | < 2,000 | Pale mauve |
| 6 | Data not available | Pale grey |
The 100 km buffer for the Thousand Island Ecosystem (Canadian portion) is indicated with a dashed brown line.
The Thousand Island Ecosystem is indicated with a dashed black line.
| Thousand Islands Ecosystem 100 km buffer area | Thousand Islands Ecosystem | |||||
|---|---|---|---|---|---|---|
| 1981 | 2,011 | percent change | 1981 | 2011 | percent change | |
| Area treated with herbicide (hectares) | 199,475 | 318,405 | 59.6 | 15,119 | 18,429 | 21.9 |
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