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Spaceward Bound: Mojave Expedition. 2nd Online Training Session February 13, 2007. Welcome !!!. Science Themes. Desert soil: Soil microbiology, soil oxidants, and soil formation. Geology: Volcanoes, rocks, Amboy crater, Cima lava flows and geology.

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slide1

Spaceward Bound:Mojave Expedition

2nd Online Training Session

February 13, 2007

Welcome !!!

science themes
Science Themes
  • Desert soil: Soil microbiology, soil oxidants, and soil formation.
  • Geology: Volcanoes, rocks, Amboy crater, Cima lava flows and geology.
  • Photosynthesis: desert hypolithic algae, cyanobacterial soil crusts, and stromatolites.
  • Caves and lava tubes, paleolakes, and remote sensing
agenda
Agenda
  • Introduction (Liza)
  • Science (Chris, Jim, Henry)
    • Photosynthesis (Theme 3)
      • Hypolithic algae under stones
      • Photosynthetic layers in Badwater salt mat
      • Stromatolites of the Crystal Springs Formation
    • Soil microbiology (Theme 1)
      • Transect: dry to wet
      • Soil microbiology studies
      • Modeling of soil physics and water state to correlate with microbiology
      • Soil organic analysis
  • Wrap up and Homework !!!
on the phone
On the phone
spaceward bound mojave science themes
Spaceward Bound MojaveScience Themes
  • Photosynthesis- hypolithic cyanobacteria- salt mats- stromatolites
  • Soil Microbiology- microbial number- life/dead ratios- soil organics & oxidants
photosynthesis
Photosynthesis
  • Photosynthesis is the ultimate base for virtually all ecosystems
  • Life on the surface is Mars = Is there photosynthesis on the surface of Mars
  • We are studying photosynthesis in dry and cold environments (Mars-like)
slide13

Colonized Stones in the Atacama Desert

Warren-Rhodes et al. Micro. Ecol. 2005

slide17

Stromatolites from the Crystal Springs carbonate formation from the Mojave Desert. Evidence of photosynthesis over a billion years ago.

soil microbiology
Soil Microbiology
  • Microbial number and diversity variations from dry to wet- culture methods- non culture methods
  • Live/dead ratios and turnover rates
  • Presence of organic material in soils
  • Presence of oxidants in soils
hyperarid 1 mm yr

Hyperarid, < 1 mm/yr

5 mm/yr

25 mm/yr

mars like soils in the atacama desert compare mojave
Mars-like soils in the Atacama Desert; compare Mojave
  • Organics drop to low levels in the arid core.
  • Oxidized organics increase in relative concentration
  • Places with no culturable microorganisms
  • Places with no recoverable DNA
  • Abiotic consumption of organic material
slide22

Mars-like soils?

Viking 2 lander:

water frost on Mars

upcoming events
Upcoming Events
  • Training
    • 2 more
      • Wed., Mar. 7, noon PST
        • Two of the science themes
        • More logistics and Q & A
      • Wed., Mar. 21, noon PDT
        • Final preparations
    • Goal
      • By the end of the training broadcasts you each will be able to decide whether you want to focuson only one or sample them all
    • Homework !!!
homework p 1
Homework p.1

Read:

  • On Spaceward Bound Resources page under Interesting Readings:
    • “Desert Landforms and Surface Processes in the Mojave National Preserve and Vicinity”
    • “The camels of the prokaryotic world”
    • “Levels of Bacterial Community diversity in Four Arid Soils Compared by Cultivation and 16S rRNA Gene Cloning”
    • On the web:
      • http://lsweb.la.asu.edu/fgarcia-pichel
        • Click on Research on the bottom of the page
      • http://www.soilcrust.org (USGS)
homework p 2
Homework p.2

Write a letter to your teacher leader

  • Tell him/her about your class and your school
    • Include the good things and the bad things
    • Go deeper than just “I teach 6th grade science.”
  • Tell him/her:
    • What you are looking forward to during the expedition
    • What’s you’re worried/unsure about
slide27

Spaceward Bound:Mojave Expedition

2nd Online Training Session

February 13, 2007

Thanks for joining us

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