Tim Ramsey and Joshua Voss BHP Billiton March 2013
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Click icon to add picture A COMPARISON OF THE VEGETATION COMMUNITIES ON GEOMORPHIC AND NON- GEOMORPHIC RECLAIMED MINE LANDS IN NORTHWESTERN NEW MEXICO Tim Ramsey and Joshua Voss BHP Billiton March 2013
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A COMPARISON OF THE VEGETATION COMMUNITIES ON GEOMORPHIC AND NON-GEOMORPHIC RECLAIMED MINE LANDS IN NORTHWESTERN NEW MEXICO. Tim Ramsey and Joshua Voss BHP Billiton March 2013. Geomorphic and Non-geomorphic Vegetation Comparison. Introduction San Juan Mine (SJM). - PowerPoint PPT Presentation
Transcript of Tim Ramsey and Joshua Voss BHP Billiton March 2013
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A COMPARISON OF THE VEGETATION COMMUNITIES ON GEOMORPHIC AND NON-GEOMORPHIC RECLAIMED MINE LANDS IN NORTHWESTERN NEW MEXICO
Tim Ramsey and Joshua VossBHP BillitonMarch 2013
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 2
IntroductionSan Juan Mine (SJM)
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 3
IntroductionSan Juan Mine (SJM)
Geomorphic reclamation
(Cottonwood south east or CWSE)
Non-geomorphic reclamation (West
Gravel Hill or WGH)
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 4
IntroductionSan Juan Mine (SJM)
WGH Non-geomorphic Approximately 450 acres Seeded 1986-1992 Vegetation sampled 2001-2003
CWSE Geomorphic Approximately 122 acres Seeded 2002 Vegetation sampled 2012
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 5
ProceduresCoverPercent of the surface that is covered by vegetation and/or litter
DensityNumber of plants per unit area
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 6
Procedures
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 7
ResultsPerennial cover (%)
WGH_2001 WGH_2003 CWSE_20120
2
4
6
8
10
12
14
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 8
ResultsPerennial cover (%)
WGH_2001 WGH_2003 CWSE_20120
2
4
6
8
10
12
14
p = 0.01
p < 0.01
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 9
ResultsShrub density (shrubs / ac)
WGH_2001 WGH_2003 CWSE_20120
200
400
600
800
1000
1200
1400
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 10
ResultsShrub density (shrubs / ac)
WGH_2001 WGH_2003 CWSE_20120
200
400
600
800
1000
1200
1400
p = 0.34
p = 0.13
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 11
ResultsRelative perennial grass cover (%)
HIJA ORHY SCPA SIHY SPAI SPCON SPCR0.00
10.00
20.00
30.00
40.00
50.00
60.00
WGH 2001 RCWGH 2003 RCCWSE 2012 RC
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 12
ResultsRelative shrub cover (%)
ATCA ATCO ATCOR ATOB CELA GUSA0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
WGH_2001 RCWGH_2003 RCCWSE_2012 RC
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 13
ResultsRelative shrub cover (%)
ATCA ATCO ATCOR ATOB CELA GUSA0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
WGH_2001 RCWGH_2003 RCCWSE_2012 RC
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 14
ResultsRelative shrub cover (%)
ATCA ATCO ATCOR ATOB CELA GUSA0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
WGH_2001 RCWGH_2003 RCCWSE_2012 RC
ATCO ATCOR ATOB0.00
2.00
4.00
6.00
8.00
10.00
12.00
WGH_2001 RCWGH_2003 RCCWSE_2012 RC
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 15
ResultsNumber of species
Shrub species Perennial grass species Perennial forb species0
1
2
3
4
5
6
7
WGH 2001WGH 2003CWSE 2012
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 16
Conclusions
1) Perennial cover was significantly greater on the geomorphic vs. the non-geomorphic area
2) Shrub density not significantly different in the geomorphic vs. the non-geomorphic area
3) Overall species composition was similar; the geomorphic landscape possibly favors shrub species diversity while the non-geomorphic area possibly favors perennial grass species diversity
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 17
Further work1) Continued sampling of geomorphic and non-geomorphic areas at San Juan Mine
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 18
Further work1) Continued sampling of geomorphic and non-geomorphic areas at San Juan Mine
2) Initiation of sampling of geomorphic areas at La Plata Mine
Geomorphic and Non-geomorphic Vegetation Comparison
Joshua Voss, March 2013 Slide 19
Questions?
