The ecological proxy map is created from nine different data layers. The map layer is aimed at representing the ‘coarse filter’ or ‘special’ ecological values, with a focus on those that may be particularly important in terms of climate change adaptation. To that end, the map includes a diversity of types of information including representing terrestrial ecosystems (older forests, grasslands), hydrologic / aquatic habitats and linkages (rivers / lakes / wetlands), mapped ‘very rich’ areas (Important Bird Areas, estuaries), and locations of rare ecosystems and species (in an attempt to reflect ‘at risk’ genetic diversity in the province). This is not a biodiversity, or 'hot-spots' map, and it is not intended to identify specific areas for conservation actions. On its own, the theme is useful to understand where there are more or fewer of the values that may reflect broad ecological values, and in particular may be useful when considering core habitat and also resilience to external stressors. Please refer to both the full report and technical methods appendix for detailed descriptions, methods and limitations of use for this layer.
Each of the nine layers is scored and totals summed for every hectare in the province. Total scores across all ecoregions are classed into three general groups by interpretation of the total scores and the input layers for each 1 hectare cell. Statistical class break points i.e., ‘Jencks natural breaks,’ did not produce useful grouping results for each category. After testing several approaches and reviewing the total scores and inputs, a ‘manual breaks’ approach achieved more consistent and interpretable results.
The following thresholds were used:
a) 'Fewer' = total scores between 0.2 - 0.9 with no top score layers.
b) 'Mid' = total scores between 1.0 - 1.9 including at least one top score proxy layer or multiple low score layers.
c) 'More' = total scores 2.0 to 4.5 and includes multiple top scoring proxy layers e.g., old growth, estuaries, etc.
Input layers:
* old and mature forest
* intact large mammal predator-prey systems
* grasslands
* wetlands
* lakes (5 ha or larger)
* major rivers
* important bird areas
* estuaries
* endangered species and ecosystems