Rangeland Ecosystem Services and Influence Of Grazing Management - - PowerPoint PPT Presentation

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Rangeland Ecosystem Services and Influence Of Grazing Management - - PowerPoint PPT Presentation

Jan 30, 2024 188 likes •493 views

A Geographically- Broad Assessment of Rangeland Ecosystem Services and Influence Of Grazing Management Shannon R. White, Thomas J. Habib, & Daniel R. Farr Alberta Biodiversity Monitoring Institute University of Alberta Its Our Nature

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It’s Our Nature to Know

Alberta Biodiversity Monitoring Institute

A Geographically- Broad Assessment of Rangeland Ecosystem Services and Influence Of Grazing Management

Shannon R. White, Thomas J. Habib, & Daniel R. Farr Alberta Biodiversity Monitoring Institute University of Alberta

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Mean Annual Precipitation 300 - 600 mm Mean Annual Temperature ~2°C (36°F) Area 661,848 km2

Alberta

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  • Substantial remnant prairie
  • Cattle grazing is predominant use
  • Provides ecosystem services
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Rangelands provide all these services (and more)

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  • Conversion continues
  • Current market doesn’t account

for ecosystem services

  • New markets for ranchers?
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  • Less than half of rangeland in “good”

condition (Prairie Agricultural Landscapes, AAFC)

  • Potential to improve rangeland management
  • Especially if there is incentive
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Value?

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  • Develop detailed,

spatially-explicit models to measure and map focal ecosystem services across Alberta, and assess how they change with land management

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  • Part of a province-wide

initiative

  • Further incorporate this

knowledge into market-based instruments

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Forage production Carbon storage

As well as pollination, water purification, biodiversity, timber production “Beta release” March 2014 Open source; open data

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  • 1. Modeling platform
  • Soil carbon
  • Grass/Crop
  • Water, N, P
  • Management

and events

(Parton et al., 1998)

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  • 1. Modeling platform:

CENTURY model

  • 2. Study extent:

Agricultural region of AB

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  • 1. Modeling platform: Century

model

  • 2. Study extent:

Agricultural region of AB

  • 3. Soil, climate & land

cover/use data for each polygon

  • 4. Run model for each soil

polygon, using i-Century (CARD, 2013)

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  • 1. Modeling platform: Century

model

  • 2. Study extent:

Agricultural region of AB

  • 3. Soil, climate & land

cover/use data for each polygon

  • 4. Run model for each soil

polygon, using i-Century (CARD, 2013)

  • 5. Extract for native grassland
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R2 = 0.61 p < .001

Century is well used model

– Validation needed

Modeled aboveground production (kg/ha)

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What questions can we ask?

  • Value over large spatial extent
  • Effect of land use/management

– Conversion between prairie and cropland – Grazing intensity

  • Trade-offs
  • Climate change
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What about modifying grazing intensity?

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Mean = 35 tC/ha Mean = 26 tC/ha

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Mean = 35 tC/ha Mean = 26 tC/ha

$15/ton CO2

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=$1.8 billion

additional carbon storage

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  • Scorecards

–For a region, or industry

  • Scenario modelling
  • Informing policy
  • Market-based instruments

–i.e. Conservation offsets, payment for ecosystem services

Applications

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Carbon credits for grassland >4X C in soil than atmosphere

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Carbon credits for grassland

Accounting based off Century model

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Funders: Collaborators: Thank you:

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shannon.white@ualberta.ca More info: http://www.ecosystemservices.abmi.ca/