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

Big Redstem is one of the most commonly found upland forest mosses in the boreal. It is often a major part of large, continuous mats of moss and lichen that spread across the forest floor of coniferous stands.

Species-habitat Associations in the Forested Region

Forested Region - Species Habitat Association Graph: Predicted species relative abundance (bars) as a function of vegetation and human footprint type in the forested region. Dots are added to forest types where harvesting occurs and show the predicted species abundance in cutblocks of various ages. Vertical lines represent 90% confidence intervals.

  • Big Redstem relative abundance is high across forest stand types in the forested region; it is also abundant in treed fen and swamp vegetation types.
  • Big Redstem relative abundance is low across human footprint types in the forested region.

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.

  • Big Redstem relative abundance is higher at treed sites than at non-treed sites in the prairie region.
  • Big Redstem relative abundance is high across soil types and uniformly low across human footprint types in the prairie region.

Relationship to Linear Footprint


Relationship to Linear Footprint in the Forested 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.

  • Big Redstem relative abundance is predicted to have a slight negative relationship with both soft and hard linear footprints in the forested region.

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.

  • Big Redstem relative abundance is predicted to have a positive relationship with soft linear footprint, and no relationship with hard linear footprint in the prairie region.

Impacts of Human Footprint

Big Redstem moss is a shade-tolerant species that thrives in moist, older forest stands. It is not tolerant of fire disturbance as it is typically quite a flammable species that burns easily and quickly, and also takes a long time to recolonise a site after a burn.

Human Footprint Effects in the Forested Region

Under-footprint Sector Effects

Human Footprint Effects in the Forested Region

Figure: Under-footprint Effects. Percentage change in Pleurozium schreberi relative abundance inside areas that have been disturbed by each sector in the forested 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 Pleurozium schreberi is impacted by specific development activities, the under-footprint figure shows how Pleurozium schreberi relative abundance is predicted to change within each sector's footprint compared to the habitat it replaced (Figure: Under-footprint Effects).

  • Big Redstem relative abundance is predicted to be lower than expected in all human footprint types compared to the habitat each footprint replaces in the forested region.

Regional Sector Effects

Human Footprint Effects in the Prairie Region

Figure: Regional Sector Effects. Percentage change in Pleurozium schreberi relative abundance throughout the forested 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 Pleurozium schreberi across the forested 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).

  • Big Redstem total population effects for all industrial sectors are small in the forested region.

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

  • Big Redstem 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 Pleurozium schreberi 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 Pleurozium schreberi 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 in the prairie region; therefore, relative abundance of Big Redstem is predicted to be lower than expected at the regional scale.
  • The remaining industrial sectors have much smaller population effects on Big Redstem at the regional scale.

Predicted Relative Abundance

Big Redstem is found in high abundance throughout the forested region of Alberta.

Reference Conditions

  • The reference condition shows the predicted relative abundance of the Big Redstem 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 Big Redstem taking current human footprint (circa 2016) into account.

Difference Conditions

  • Big Redstem relative abundance is predicted to be lower than expected under current conditions compared to reference conditions, especially in the Parkland Natural Region, much ofthe Foothills Natural Region, and localized areas of the Boreal Forest Natural Region.
  • Big Redstem relative abundance is predicted to be higher than expected under current conditions compared to reference conditions in scattered parts of the Foothills and Boreal Forest Natural Regions, as well as the central Grassland Natural Region.

References & Credits

References & Credits

Johnson, D., Kershaw, L., MacKinnon, A., and J. Pojar. 1995. Plants of the Western Boreal Forest. Lone Pine Publishing, Edmonton, AB. 392 pp.

Tesky, Julie L. 1992. Pleurozium schreberi. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Available: https://www.fs.fed.us/database/feis/plants/bryophyte/plesch/all.html. Accessed: October 3, 2019.

Data Sources

Data collected by ABMI.

Photo Credits

Richard Caners

Recommended Citation

Alberta Biodiversity Monitoring Institute. 2019. Big Redstem (Pleurozium schreberi). ABMI Website: abmi.ca/home/data-analytics/biobrowser-home/species-profile?tsn=99000843.

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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for testing profile: [{QALog=

Kat Villeneuve Published on October-03-2019

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Big Redstem is a common moss species that is widespread across Alberta and the northern hemisphere. It is characterized by its distinctive red stem, and is often found forming extensive mats across the forest floor. Big Redstem has been detected in all natural regions of the province, but is most commonly found in the Boreal Forest, Foothills and Canadian Shield Natural Regions.

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Big Redstem is one of the most commonly found upland forest mosses in the boreal. It is often a major part of large, continuous mats of moss and lichen that spread across the forest floor of coniferous stands.

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Big Redstem moss is a shade-tolerant species that thrives in moist, older forest stands. It is not tolerant of fire disturbance as it is typically quite a flammable species that burns easily and quickly, and also takes a long time to recolonise a site after a burn.

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Big Redstem is found in high abundance throughout the forested region of Alberta.

, SummaryType=TRUE, QADate=2019-10-03T00:00:00.000-06:00, WebReference=

Johnson, D., Kershaw, L., MacKinnon, A., and J. Pojar. 1995. Plants of the Western Boreal Forest. Lone Pine Publishing, Edmonton, AB. 392 pp.

Tesky, Julie L. 1992. Pleurozium schreberi. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Available: https://www.fs.fed.us/database/feis/plants/bryophyte/plesch/all.html. Accessed: October 3, 2019.

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KV writing for BB only

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Richard Caners

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