A picture of drought: ND ecologist matching NASA images with field data to measure forest health
Nate Swenson strides so quickly through the Wisconsin forest while carrying a large pole clipper that postdoctoral researcher Vanessa Rubio usually follows the 40 feet of rope dragging behind him.
When they reach the designated plot, Swenson extends the clipper about 30 feet high and pulls the rope to snip off a leafy twig from the canopy of a tall, tagged tree. The twig floats down through the dappled sunlight and lands in his hand.
It would be a majestic scene but for the mosquitoes. Hundreds and thousands of them, swarming everything that smells like warm blood.
Swenson cuts twigs from nine sample trees in each plot where the reflection of light from the leaves could show up in a space-based image. Rubio selects one leaf from each twig, folds it into a labeled test tube, and drops it in a metal canister of liquid nitrogen.
This flash freezing will preserve its RNA, which degrades quickly otherwise. Later in his campus lab, Swenson can study the leaf’s gene expression, which changes as it is stressed by drought later in the summer.
Latest Colleges & Schools
- Notre Dame’s theology department ranked best in the worldThe University of Notre Dame has been ranked as the world’s best theology, divinity, and religious studies program by the influential QS World University Rankings. This is the fourth time since 2020 the Department of Theology has received the No. 1 distinction.
- Record-tying four Notre Dame students named 2025 Goldwater ScholarsA record-tying four University of Notre Dame students have been named 2025 Goldwater Scholars in recognition of their exceptional promise as future leaders in the natural sciences, engineering and mathematics.
- In memoriam: Elizabeth Nanovic, founding benefactor of the Nanovic InstituteElizabeth Nanovic, a founding benefactor and advisory board member of the Nanovic Institute for European Studies, part of the Keough School of Global Affairs at the University of Notre Dame, passed away on March 30. She was 90.
- ‘Quiet eye’: Notre Dame psychologist identifies links between a steady gaze and elite performanceIn a recent study supported by the U.S. Naval Research Laboratory and the Army Research Institute, Notre Dame psychologist Matthew Robison documented a phenomenon in eye movement — or “oculomotor dynamics” — that links a steady, focused gaze with superior levels of performance.
- ‘Who the messenger is matters’: Cultural leaders can positively influence population growthFertility rates across the world have been steadily dropping since 1950. Pinpointing the reasons is at the heart of Lakshmi Iyer's work as a professor of economics and global affairs. Her research exemplifies the kind of population-level research that Notre Dame Population Analytics (ND Pop), a new research initiative at the University, seeks to foster.
- ND Expert on tariffs and trade policy: ‘How should the US be engaged with the rest of the world?’To make sense of the new administration's recent tariff announcements and policy changes, Robert Johnson, the Brian and Jeannelle Brady Associate Professor of Economics at Notre Dame, explains how tariffs affect global economies and what this means for U.S. engagement in global trade.
