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Watershed Planning within a Quantitative Scenario Analysis Framework
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Invasive species and coal bed methane development in the Powder River Basin, Wyoming.

E Bergquist1, P Evangelista, T J Stohlgren

  • 1Natural Resource Ecology Laboratory, Colorado State University, Ft. Collins, Colorado 80523, USA. bergquistesu@yahoo.com

Environmental Monitoring and Assessment
|October 4, 2006
PubMed
Summary

Coal bed methane (CBM) development in Wyoming disrupts native ecosystems, increasing non-native plant invasions and soil salinity. Management should address landscape-scale impacts to preserve plant diversity.

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Area of Science:

  • Ecology
  • Environmental Science
  • Botany

Background:

  • Coal bed methane (CBM) extraction is expanding rapidly, particularly in Wyoming's Powder River Basin.
  • CBM development may increase ecosystem vulnerability to non-native species invasion.
  • Few studies have investigated the environmental impacts of CBM extraction on native flora.

Purpose of the Study:

  • To assess the effects of CBM development on native plant distribution.
  • To evaluate patterns of non-native plant invasion associated with CBM activities.
  • To understand the ecological consequences of CBM-induced disturbances.

Main Methods:

  • Established 36 modified Forest Inventory and Analysis plots in the Powder River Basin, Wyoming.
  • Sampled 168-m2 subplots across control sites and various CBM disturbance types (secondary, major surface, well pads, discharge points).
  • Quantified native and non-native plant species cover and richness, and measured soil salinity.

Main Results:

  • Native plant cover was lowest on well pads (17.7%).
  • Non-native plant cover was highest in discharge areas (31.0%).
  • Disturbed sites showed significantly higher non-native species richness and soil salinity compared to control sites.

Conclusions:

  • CBM development and associated disturbances facilitate non-native plant establishment.
  • Increased soil salinity in disturbed areas may favor non-native species.
  • Landscape-scale management is crucial for conserving native plant diversity amidst CBM expansion.