A scientist rinses out a syringe before collecting a water sample from a stream. The canopy overhead blocks out most of the sunlight.
The undergrowth of the Amazon is chaotic.
The scientist on the right measures water temperature and oxygen content using a tool called a YSI. On the left, a scientist threatens to squirt him with a water sample.
Another water measurement sample, this time in a riparian area.
A scientist keeps an eye out for dangerous animals, including jaguars and wild boars.
A scientist holds a machete used to cut through the forest.
Light is a rare thing on the forest floor. This fern is lucky to have it.
The transition between farmland and forest.
Erosion is a big problem for farmlands. Trees hold soil in place and absorb far more water than soybean plants.
The forest canopy, taken atop a tower that measures carbon dioxide concentrations in the area.
Climbing the tower.
A homemade contraption designed to measure greenhouse gas emissions from nearby reservoirs. It was light enough to float atop the water. The airtight transparent chamber opens and closes automatically to refresh the air every so often.
Construction for the floating chamber.
A scientist completes a final wiring check for the chamber before deployment.