(0,0) Hotspot

Erin Male, William Pickles

UC Santa Cruz

September 21, 2009

E.Male, W.Pickles, UCSC, Sept. 2009

(0,0) Hotspot

• Transect from (-1.5m, 0m) to (-1.5m, 10m)

• Mown once, prior to start of injection

• Mostly Kentucky Bluegrass within 1 meter of Injection Well

• Mix of grass varieties and dandelions beyond 1m

N

Met

ers

Injection Well

E.Male, W.Pickles, UCSC, Sept. 2009

~0.5 meters away from well, dominated by Kentucky Bluegrass

July 15th, 2009 (Before injection)

July 28th, 2009 (Day 13)

August 13th, 2009 (Day 29)

E.Male, W.Pickles, UCSC, Sept. 2009

~1.5 m from injection well, Mixture of Grass Species and Dandelions

July 15, 2009

August 10th, 2009

E.Male, W.Pickles, UCSC, Sept. 2009

Mostly Kentucky Bluegrass Mixture of tall & short grasses and dandelions

0.3m0.3m 0.8m0.8m 1.6m1.6m 2.5m2.5m

Previously damaged by foot traffic and other equipment

(0,0) Hotspot: July 25, 2009

Facing SW

E.Male, W.Pickles, UCSC, Sept. 2009

July 15, 2009July 15, 2009:: Spectra indicated healthy vegetation of all species types before the start of the injection

E.Male, W.Pickles, UCSC, Sept. 2009

July 25, 2009July 25, 2009: Even though the Kentucky Bluegrass at 0.8m was closer to the injection well, it was less stressed than the mixture of grass at 1.6m, demonstrating Kentucky Bluegrass’ resistance to CO2 stress

E.Male, W.Pickles, UCSC, Sept. 2009

August 12, 2009August 12, 2009: Although all sites were heavily stressed, KB at 8m was less stressed when compared to sites of other vegetation types

E.Male, W.Pickles, UCSC, Sept. 2009

(0,0) Hotspot: August 11, 2008August 11, 2008

E.Male, W.Pickles, UCSC, Sept. 2009

1-meter Transect across (0,0) Hotspot: July 28, 2008July 28, 2008

Even gradation of stress across the 0,0 hotspot in 2008 indicates there were no areas of more resistant vegetation