Alberta Map
Alberta Map

Introduction

Over its decade-plus of operations, the ABMI has generated a comprehensive dataset on Alberta’s species, their habitats, and the extent and type of human footprint across the province. With this information, the ABMI has developed analyses to predict species' relative abundances and examine species' responses to vegetation and soil types, as well as human footprint in Alberta. These methods have been applied to hundreds of species; this profile provides summary results for one.

Habitat & Human Footprint Associations

Prairie Crocus is strongly associated with native prairie habitat, and can also be found in dry open woodlands with sandy soil.

Species-habitat Associations in the Prairie Region

Non-Treed Sites in the Prairie Region

Non-Treed Sites in the Prairie Region

Treed Sites in the Prairie Region

Treed Sites in the Prairie Region

Prairie Region - Species Habitat Association Graph: Predicted species relative abundance (bars) in each soil type and human footprint type in the prairie region. Vertical lines indicate 90% confidence intervals. The presence/absence of trees greatly affects the presence and abundance of many species; therefore, separate figures are presented for treed and non-treed sites in the prairie region.

  • Prairie Crocus relative abundance is predicted to be higher at non-treed sites compared to treed sites in the prairie region.
  • Prairie Crocus relative abundance is predicted to be highest in clay and saline soil types and rough pasture human footprint type in the prairie region.

Relationship to Linear Footprint


Relationship to Linear Footprint in the Prairie Region

Linear Footprint Graph: Species relative abundance predicted for habitat with no human footprint compared to habitat in which 10% of the area is converted to either soft or hard linear footprint.

  • Prairie Crocus relative abundance is predicted to have a slight, negative relationship with soft linear footprint and hard linear footprint in the prairie region.

If it is not possible to create complex habitat association models for a given species, we present a coarse index of habitat use that represents the proportion of detections in each native vegetation, soil, and human footprint type in comparison to the proportional availability of the habitat types.

Habitat Associations for Species with Few Detections in the Forested Region

Use-availability index graph: Index of species habitat use based on the proportion of species detections in each native vegetation and human footprint type in comparison to the habitat availability. The index (bars) range from -1 (avoidance) to +1 (preference), given availability of a particular vegetation or human footprint type.

Impacts of Human Footprint

Prairie Crocus has a high tolerance for grazing but is negatively affected by cultivation and the presence of invasive species.
 

Human Footprint Effects in the Prairie Region

Under-footprint Sector Effects

Human Footprint Effects in the Prairie Region

Figure: Under-footprint Effects. Percentage change in Anemone patens relative abundance inside areas that have been disturbed by each sector in the prairie region. Dot above bar indicates change in abundance is greater than 100%. Refer to value above or below the bar for the estimated under-footprint effect.

To understand how the Anemone patens is impacted by specific development activities, the under-footprint figure shows how Anemone patens relative abundance is predicted to change within each sector's footprint compared to the habitat it replaced (Figure: Under-footprint Effects).

  • Prairie Crocus relative abundance is predicted to be lower than expected in all human footprint types compared to the habitat each footprint replaces in the prairie region.

Regional Sector Effects

Human Footprint Effects in the Prairie Region

Figure: Regional Sector Effects. Percentage change in Anemone patens relative abundance throughout the prairie region due to the respective footprints of each sector. Refer to value above or below the bar for the estimated regional effect.

The Regional Sector Effects graph shows the predicted change in the total relative abundance of the Anemone patens across the prairie region due to each sector's footprint, considering the: area of the footprint in the region, under-footprint effect, and habitat types impacted by a particular sector (Figure: Regional Sector Effects).

  • Agriculture footprint has the strongest negative population effect because it has the largest area in the prairie region; therefore, relative abundance of Prairie Crocus is predicted to be lower than expected at the regional scale.
  • The remaining industrial sectors have much smaller population effects on Prairie Crocus at the regional scale.

Predicted Relative Abundance

Prairie Crocus is most commonly found in the Grassland and Parkland Natural Regions.

Reference Conditions

  • The reference condition shows the predicted relative abundance of the Prairie Crocus after all human footprint had been backfilled based on native vegetation in the surrounding area.

Current Conditions

  • The current condition is the predicted relative abundance of the Prairie Crocus taking current human footprint (circa 2012) into account.

Difference Conditions

  • Prairie Crocus relative abundance is predicted to be lower under current conditions than reference conditions throughout much of its range in Alberta.

References & Credits

References & Credits

Budd, A.C. 1987. Budd's Flora of the Canadian Prairie Provinces. Second Edition. Agriculture Canada, Hull, QC.

Moss, E.H. 1994. Flora of Alberta. Second Edition. University of Toronto Press, Toronto, ON.

Williams, J.L., and E.E. Crone. 2006. The impact of invasive grasses on the population growth of Anemone patens, a long-lived native forb. Ecology 87(12):3200-3208.

Data Sources

Data collected by ABMI.

Photo Credits

Varina Crisfield

Recommended Citation

Alberta Biodiversity Monitoring Institute. 2019. Prairie Crocus (Anemone patens). ABMI Website: abmi.ca/home/data-analytics/biobrowser-home/species-profile?tsn=99004768.

Additional ABMI Resources

Alberta Biodiversity Monitoring Institute. 2016. ABMI Species Website Manual, Version: 2016-12-02. Alberta Biodiversity Monitoring Institute, Alberta, Canada. Report available at: abmi.ca.

Alberta Biodiversity Monitoring Institute. 2014. Manual for Species Modeling and Intactness, Version 2014-09-25. Alberta Biodiversity Monitoring Institute, Alberta, Canada. Report available at: abmi.ca.

Alberta Biodiversity Monitoring Institute. 2014. Terrestrial field data collection protocols (abridged version) 2016-05-18. Alberta Biodiversity Monitoring Institute, Alberta, Canada. Report available at: abmi.ca.

Download ABMI Species and Habitat Data.

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