Sarah Knutie, Ph.D.
Assistant Professor University of Connecticut
Biography
She is particularly interested in whether the early-life microbiota of hosts mediate the effect of environmental factors (e.g. pollution, climate change, resource availability) on disease risk. She also has a passion for teaching, especially when she can incorporate a hands-on field component, and mentors an amazing group of female scientists.
Areas of Expertise
Education
University of Utah
Ph.D.
Social
Media Appearances
Tadpole's gut microbiome can predict a frog's health
United Press International online
2017-07-27
"Our study found that a disruption of bacteria in tadpoles has enduring negative effects on how adult frogs deal with their parasite," Sarah Knutie, a biologist. "These results suggest that preventing early-life disruptions of bacteria by factors such as nutrition, antibiotics and pollution, might confer protection against diseases later in life."
Scientists help Galapagos finches combat killer maggots
Reuters online
Finding a method to control the flies has become a top priority for scientists studying the Galapagos birds. “There are currently no methods to effectively combat the parasite,” said Sarah Knutie, one of the researchers.
Saving Darwin's finches from blood-sucking parasites
The Guardian online
Earlier this month, a study by Sarah Knutie tested an ingenious way to get finches to fumigate their own nests. They set up dispensers for cotton laced with insecticide, which the birds incorporated into their nests, protecting them from infestation.
Darwin's finches face extinction within decades because of parasitic flies on Galapagos Islands
International Business Times online
The birds that helped inspire the theory of evolution could go extinct in just decades, scientists have warned. Researchers say Darwin's finches could be wiped out by parasitic flies that arrived on the islands in the 1960s in as little as 50 years.
Articles
Early-life disruption of amphibian microbiota decreases later-life resistance to parasites
Nature CommunicationsSarah A Knutie, Christina L Wilkinson, Kevin D Kohl, Jason R Rohr
2017
Changes in the early-life microbiota of hosts might affect infectious disease risk throughout life, if such disruptions during formative times alter immune system development. Here, we test whether an early-life disruption of host-associated microbiota affects later-life resistance to infections by manipulating the microbiota of tadpoles and challenging them with parasitic gut worms as adults. We find that tadpole bacterial diversity is negatively correlated with parasite establishment in adult frogs: adult frogs that had reduced bacterial diversity as tadpoles have three times more worms than adults without their microbiota manipulated as tadpoles...
Host resistance and tolerance of parasitic gut worms depend on resource availability
OecologiaSarah A Knutie, Christina L Wilkinson, Qiu Chang Wu, C Nicole Ortega, Jason R Rohr
2017
Resource availability can significantly alter host–parasite dynamics. Abundant food can provide more resources for hosts to resist infections, but also increase host tolerance of infections by reducing competition between hosts and parasites for food. Whether abundant food favors host resistance or tolerance (or both) might depend on the type of resource that the parasite exploits (e.g., host tissue vs. food), which can vary based on the stage of infection...
Tri-trophic ecology of native parasitic nest flies of birds in Tobago
EcosphereSarah A Knutie, Jordan M Herman, Jeb P Owen, Dale H Clayton
2017
Introduced parasites threaten host populations around the world. For example, introduced parasitic nest flies (Philornis downsi) have contributed to the decline of several species of Darwin's finches in the Galápagos Islands. Introduced parasites are thought to have severe effects on native hosts because the hosts do not have effective defenses against such parasites and/or because introduced parasites have escaped the native enemies that keep their own populations in check...
