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

Bluebur is an annual weed introduced from Eurasia first recorded in Alberta in 1899. Bluebur overwinters as a seed and is persistent in the seed bank. Its hooked seeds cling to animal fur and are thus transported long and short distances to new habitats.

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.

  • Bluebur relative abundance is higher in non-treed than treed sites in the prairie region.
  • Bluebur relative abundance is highest in tame pasture and urban/industry human footprint types 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.

  • Bluebur relative abundance is predicted to have a slight, positive relationship with hard linear footprint and a slight, negative relationship with soft 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.

Predicted Relative Abundance

Bluebur is found throughout the prairie region of Alberta and is most common in the Grassland Natural Region.

Current Conditions

  • The current condition is the predicted relative abundance of the Bluebur taking current human footprint (circa 2016) into account.

Difference Conditions

  • Bluebur is predicted to be lower in relative abundance under current conditions throughout most of the prairie region. 
  • Bluebur is predicted to be higher in relative abundance under current conditions in scattered areas throughout the prairie region.

Other Issues

Bluebur is an invasive weed, but is not considered to be noxious in Alberta.

References & Credits

References & Credits

Alberta Queen's Printer.  2010. Weed Control Regulation. Government of Alberta, Edmonton, AB.

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

Frick, B. 1984. The biology of Canadian weeds.: 62. Lappula squarrosa (Retz.) Dumort. Canadian Journal of Plant Science 64(2):375-386.

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

Data Sources

Data collected by ABMI.

Photo Credits

Photos: TBD

Recommended Citation

Alberta Biodiversity Monitoring Institute. 2019. Bluebur (Lappula squarrosa). ABMI Website: abmi.ca/home/data-analytics/biobrowser-home/species-profile?tsn=99002709.

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.

View ABMI Collaborations.

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Shantel Sparkes edited for content May-28-2018.

Niki Wilson edited for tone and copy April-12-2017

John Wilmshurst Writing on February-10-2017
John Wilmshurst Submitted February-13-2017

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Bluebur is an introduced, flowering plant found in southern Alberta. This much-branched plant with small, blue flowers and hooked seeds is an early colonizer of disturbed land, roadsides and abandoned fields in the Grassland and Parkland Natural Regions.

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Bluebur is an invasive weed, but is not considered to be noxious in Alberta.

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Bluebur is an annual weed introduced from Eurasia first recorded in Alberta in 1899. Bluebur overwinters as a seed and is persistent in the seed bank. Its hooked seeds cling to animal fur and are thus transported long and short distances to new habitats.

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Bluebur is an introduced weed that is adapted to human disturbances such as agricultural fields, pastures, roadsides, railways and abandoned lots. It benefits from human-altered habitats.

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Bluebur is found throughout the prairie region of Alberta and is most common in the Grassland Natural Region.

, SummaryType=TRUE, QADate=2017-04-12T00:00:00.000-06:00, WebReference=

Alberta Queen's Printer.  2010. Weed Control Regulation. Government of Alberta, Edmonton, AB.

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

Frick, B. 1984. The biology of Canadian weeds.: 62. Lappula squarrosa (Retz.) Dumort. Canadian Journal of Plant Science 64(2):375-386.

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

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JW FEb 2017: BB and NL written using fall 2016 templates and science centre analyses.  NL readability = 8.0

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