12June Atacama McKay

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Atacama LifeVida en Atacama: 

Atacama Life Vida en Atacama Chris McKay andamp; Maite Trujillo NASA Ames cmckay@mail.arc.nasa.gov mtrujillo@mail.arc.nasa.gov

Slide2: 

A transect from arid to extreme arid Yungay station, extreme arid 50 times drier than Death Valley 500 km south of Yungay, arid about as dry as Death Valley

Slide3: 

Colonized Stones in the Atacama Desert Warren-Rhodes et al. Micro. Ecol. 2005

Slide4: 

Crestline for the coastal range in the Atacama Desert

Rock garden: 

Rock garden Altamira Vineyard

Slide6: 

Moisture mm/yr Life Mars-like soils Soil Bacteria Hypolithic algae Shrubs and insects 1 5 25 125 Desert ecosystems Gobi Desert Mojave Desert Biology wins reducing Photochemistry wins, oxidizing Nitrate deposits 0.2

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Moisture Bacterial Counts Biologyandgt;Oxidant Biology~Oxidant Biologyandlt;Oxidant

Implications: 

Implications Length scale of patchiness should vary with moisture. Soil organics will be patchy and correlate with soil organisms. Soil oxidant will be patchy and anti-correlated with organisms.

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