Collecting microbial mats for a greenhouse experiment in Area 4 of the Exportadora de Sal saltern system, Guerrero Negro, Baja California Sur, Mexico. Thick microbial mats line the bottom of this entire pond.

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A microbial mat is lowered into a plastic box for transport.

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Plastic strips are being screwed onto the boxes to hold the mats securely, and limit exchange of material from the deeper parts of the mat.

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An exterior view of Greenhouse One. A small part of the San Francisco Bay is visible to the right of the greenhouse. For a live look inside at the greenhouse, click here.

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This is our remotely operable XYZ table, an important element of our greenhouse collaboratory.

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Oxygen microelectrodes can be positioned anywhere on the XYZ table, and can be lowered into the mats at at a spatial resolution of about 50 micrometers.

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Here, flux chanbers have been placed over the mats at the far end of the flow boxes in order to measure the fluxes of oxygen, dissolved inorganic carbon, and nutrients between the mats and the water.

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A remotely operable webcam enables us to see where the electrodes are positioned. For a live look inside at the greenhouse, click here.

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