Canola (Brassica rapa) — Vascular plants

Map of records at surveyed locations

Map of detections

The map shows survey locations (+) and detections (dots). Natural regions are shown as different background colors. Note: off-grid sites are plotted at the nearest systematic site location, and the number of detections indicated and the actual number of dots in the map might be different.

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Habitat associations for species with few detections, North

Use-availability, North

It was not possible to create complex habitat association models for species detected fewer than 20 times in northern Alberta study area. For these species, a coarse index of habitat use was determined as the proportion of detections in each native vegetation and human footprint type in comparison to the proportional availability of the habitat types (see methods and manual). An index value <0 indicates lower than expected proportion of detections in that habitat type; and index value >0 indicates a higher than expected proportion. Due to the coarseness of the analyses, maps of predicted habitat abundance were not created for these species.

Habitat associations in southern Alberta

Treed sites

Soils, treed, South

Models were used to show how species, relative abundance differed among soil and human footprint types in the grassland and parkland regions of Alberta (see methods and manual). Models were only created for species that had at least 20 detections using data from ABMI. Due to natural disturbances and vegetation succession, varying amounts of aspen and other trees may be present on each soil type; the presence/absence of trees greatly affects the presence and abundance of many biota. As such, information is presented twice for southern Alberta: once for sites with trees present, and onec for sites without trees present. Predicted species abundance in each soil/human footprint type is shown with bars. Vertical lines indicate 90% confidence intervals.

Non-treed sites

Soils, non-treed, South

Models were used to show how species' relative abundance differed among soil and human footprint types in the grassland and parkland regions of Alberta (see methods and manual). Models were only created for species that had at least 20 detections using data from ABMI. Due to natural disturbances and vegetation succession, varying amounts of aspen and other trees may be present on each soil type; the presence/absence of trees greatly affects the presence and abundance of many biota. As such, information is presented twice for southern Alberta: once for sites with trees present, and onec for sites without trees present. Predicted species abundance in each soil/human footprint type is shown with bars. Vertical lines indicate 90% confidence intervals.

Linear footprint relationships in southern Alberta

Linear footprint relationship, South

For linear footprint in southern Alberta. The pairs of points show the change in relative abundance expected between the average habitat with no linear footprint (left point) and average habitat when 10% linear footprint is present (right point) (see methods and manual).

Predicted relative abundance throughout Alberta under current conditions

Map

Habitat association models, plus models describing how species varied spatially and with climate gradients were used to predict species abundance in 1 km2 spatial units under current conditions (see methods and manual). Predictions of relative abundance of the species in each 1 km2 unit were made based on the vegetation and human footprint present in the 1 km2 unit in 2012. Pixels depicted in red are predicted to have the highest abundance for the species, grading through light tan to dark blue where the species is predicted to be less abundant or absent. This figure has uncertainty due to uncertainty in the models and in the underlying vegetation map (see uncertainty map below).

Uncertainty in predicted current conditions

Map

To highlight the degree of uncertainty in the models, we estimated the prediction standard error for each township based on bootstrap predictions of current abundance. 10 km x 10 km units depicted in red have the higheststandard error, while 10 km x 10 km units in dark green have the lowest (see methods and manual).

Reference and difference maps are not provided for non-native vascular plant species.

Data sources

Information from Alberta Biodiversity Monitoring Institute (ABMI) plots was used to conduct the modeling described in this website.

Recommended citation

ABMI (2018). Canola (Brassica rapa). ABMI Species Website, version 5.0 (2017-07-13). URL: http://species.abmi.ca/pages/species/vplants/Brassica.rapa.html.