Meet Stengl-Wyer Fellow: Colin Morrison

January 18, 2021 • by Nicole Elmer
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sharks

Left: Sharks by Colin in 1st grade. Right: Colin with shark helmet and shark comic t-shirt

What got you interested in studying Heliconius caterpillars and passion vine flea beetles?

I have been involved in research that focused on the ecology and evolution of resource specialization for some time. This includes organisms like inch worms that eat plants in the black pepper family, tortoise beetles that consume morning glories, and cane toads eating huge quantities of the infamous bullet ants! While most of my previous research has been on chewing insects that coevolved to eat specific plants, I am interested in any ecological interactions associated with resource specialization from monkeys to microbes. The biological themes that underlie these kinds of interactions are variation in diet breadth and coevolution with chemicals present in the food source. To be a jack or all trades and a master of none? Or go all in on exploiting one resource extremely well? The truth is that most species of herbivorous insects specialize on eating a very small number of plant species out of the buffet of plants available in most environments.

Heliconius caterpillars and passion vine flea beetles are exemplar of coevolution on specific resources that are defended by suites of toxic chemical compounds. My advisor, Dr. Larry Gilbert, and his former students have studied Heliconius and passion vines for over 40 years. These researchers documented the natural history of this system extremely well. The importance of this cannot be overstated. Without this knowledge researchers that are new to the system (or any complex system) would be hard pressed to formulate good hypotheses to test. Field observations of the natural history operating around passion vines have given clues that Gilbert lab members have successfully leveraged in designing great experiments that characterized the processes governing the system. These include, pollen feeding and the evolution of big brains, pupal mating and conflicting selection pressure on male and female butterflies, warning coloration and the ability to sequester plant chemicals for defense, and repeatable evolution of mimicry complexes.

How do field labs like Brackenridge Field Lab and Stengl Lost Pines figure into your work?

Field stations are among the most significant institutions of scientific discovery on the planet. My career started at a field station and is largely maintained by ongoing work at several including Brackenridge Field Lab (BFL) and Stengl Lost Pines Biological Station (SLP). They have long-term data collection happening at the time scale required to make responsible conclusions about ecological processes that manifest over long periods of time. These long-term data sets are key to developing practical approaches to modern struggles.

I have gotten great value from using both BFL and SLP in multiple capacities. I have collected samples for my research, facilitated experiential learning in the field for students as a teaching assistant, the field stations are my favorite places to have productive meetings with colleagues, employees and potential collaborators, at BFL I get to share my passion and knowledge of nature with the public monthly during the grad student run outdoor lecture series Science Under the Stars, I use the first-class greenhouse facilities at BFL for running experiments and maintaining laboratory cultures of host plants and insects, and I regularly use the modern analytical lab in the BFL building for doing chemistry.

There is also something wonderful about field stations providing a way for people to get together, talk, share, and think about science as a community. The photo of me and my friends, fellow REU mentors, at La Selva Biological Station, Costa Rica speaks volumes to that!

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Field work mentors for the National Science Foundation – Research Experience or Undergraduates (REU) program at La Selva Biological Station, Costa Rica in June 2019

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