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 slightly 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 at both non-treed and treed sites.
  • Relative abundance is very low in cultivated and urban/industrial human footprint types.

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 impacted by cultivation and the presence of invasive species.
 

Human Footprint Effects in the Prairie Region

Sector effect graph: Changes to species relative abundance (number above or below bar) attributed to the footprint of five sectors: agriculture, forestry, energy, rural/urban footprint, and transportation. The y-axis shows the percent population change per unit area of the sector's footprint. The x-axis shows the total area occupied by each sector's footprint in the region. The areas of the sector-specific rectangle (equal to the unit effect multiplied by the area of footprint) is the total effect of the sector on the species relative abundance in the region.

  • All human footprint types are predicted to negatively impact the Prairie Crocus in the prairie region resulting in a predicted decrease in relative abundance compared to reference conditions.
  • Because of the large area it occupies, agriculture footprint has the largest overall effect resulting in a predicted decrease in relative abundance compared to reference conditions.

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 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. 2018. 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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