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Research Briefs

August 25, 2021 by artsciweb


Tomato Production At Risk Due to Decrease in Buzz Pollinators

tomatoesTomatoes are the heart of many backyard gardens. Tomato crops are also an important economic revenue in North America. The vegetable we all know as the “T” of a great summer BLT, however, may be in jeopardy due to a decline in its pollinator species because of climate change.

According to a study published in Ecological Applications, tomato production is at risk in the Eastern United States due to climate-induced decrease in the richness of buzz pollinators. Approximately 70 percent of the world’s crops depend on insect pollination for production. Climate change is already affecting the abundance of pollinators, but researchers with the National Institute for Mathematical and Biological Synthesis (NIMBioS) wanted to know how climate change impacts the pollination of specific crops. Read More


Evolution of Tropical Biodiversity Hotspots

Chapada do Araripe, Ceará.For decades, scientists have worked to understand the intricacies of biological diversity – from genetic and species diversity to ecological diversity.

While scientists agree that most biological diversity originated in the tropics, the jury is still out on how tropical species diversity formed and how it is maintained. A new study published in Science addresses these long-standing questions. Read More


Study Finds Protected Areas Vulnerable to Food Security Concerns

Protected areas are critical to mitigating extinction of species; however, they may also be in conflict with efforts to feed the growing human population.

Paul Armsworth, professor of ecology and researcher with the National Institute for Mathematical and Biological Synthesis (NIMBioS) is the co-author of a new study showing croplands are prevalent in protected areas, which challenges their efficacy meeting conversation goals. Varsha Vijay, a researcher at the University of Maryland’s National Socio-Environmental Synthesis Center (SESYNC) is the lead author. Read More

Filed Under: newsletter, Uncategorized

Student Spotlights, Fall 2021

August 24, 2021 by artsciweb

KatieWhitakerKatherine Whitaker graduated magna cum laude in May 2021 as a biology major, concentrating in ecology and evolutionary biology. Katie excelled in both her course work at UK and as a successful undergraduate researcher. 

During her second year at UT, Katie joined the Budke Lab < http://jmbudke.github.io> and carried out an independent research project studying the impact of parental structures on water movement in mosses, which directly impacts offspring survival and fitness. Katie presented her research virtually at the 2020 Botanical Society of America Conference and her presentation was awarded an honorable mention for the best student talk in bryology and lichenology. Katie’s research will also be shared with the scientific community as a peer-reviewed publication in the journal Evansia in summer 2021. 

By engaging in this undergraduate research experience Katie gained skills in experimental design, statistical analyses, and science communication that she will carry with her into her career beyond UT. 

KayciMesserlyKayci Messerly graduated from EEB in May 2021 with a minor in statistics. She completed a research study in the Derryberry lab on heat stress effects on the behavior of zebra finches in collaboration with graduate student Casey Coomes. Her hundreds of hours scoring behavioral videos paid off with presentations at two national conferences, The Animal Behavior Society and the Society for Integrative and Comparative Biology. 

Kayci has also become involved in a number of other research projects in the Derryberry lab, including work on heat stress effects on tree swallows (Kayci is pictured here holding a tree swallow). Luckily for EEB, Kayci is staying on another year as a lab manager, supporting a number of projects in the Derryberry and Blum labs.  

Undergraduates from multiple departments kicked off a study in spring 2020, under the direction of Ben Keck, aiming to answer questions about the abundance and composition of microplastics in fishes from the upper Tennessee River system. Microplastics were observed at levels greater than other pollutants in the Tennessee River in a 2017 study, but there is no information on how many and what type of microplastics are ingested by fishes in the system. Undergraduate researchers Anna Ward (EEB and psychology), Anna Brown (BCMB), Sydney Craig (animal science), Melissa Demmitt (environmental and soil science) and Caroline Hecht (kinesiology) are extracting microplastics from preserved fishes in the DAE Ichthyological Collection to identify correlations of microplastics with trophic levels, land use in the watershed upstream of the sampling localities, and from the same streams through time. 

The DAE Ichthyological Collection enables preliminary work on each of these questions using specimens sampled for other UT studies or deposited by TVA and other governmental agencies. Many specimens were sampled from the same streams at fairly regular intervals over the past 50 years and now serve as time capsules of the conditions that existed at the time of sampling.

These researchers are undertaking original research to answer key questions of importance to Tennessee, gaining valuable research experience in the process.

Filed Under: newsletter, Uncategorized

A Man of the Biosphere

August 24, 2021 by artsciweb

Alumni Spotlight: Vernon C. (Tom) Gilbert

tom gilbertMembers of the Department of Ecology and Evolutionary Biology recognize and are proud of the long history of programs for conservation of natural resources and the promotion of human welfare that Tom Gilbert (BA ‘50, MS ‘52) has envisioned and led throughout much of the world. 

In his long career, Tom served in numerous positions with the US National Park Service, including as chief of the NPS Environmental Education Program and as associate chief scientist for natural area preservation. He was project leader for joint NPS and US Agency for International Development (USAID) projects in India and Africa, was the UNESCO Man and the Biosphere coordinator for the US-USSR. Summit Agreement on Biosphere Reserves, was field director of the USAID Environmental Training and Management Project (12 country effort) and was the leader of the US delegation to the Third World Congress on Biosphere Reserves. 

Tom’s contributions and achievements in natural areas conservation are long and significant. He worked for many years in Africa, India, and Central America where he planned natural area reserves and natural parks. He was pivotal from the earliest stages in planning and promoting UNESCO International Biosphere Reserves throughout the world, including the establishment of Great Smoky Mountains National Park as one of the world’s first International Biosphere Reserves in 1976. Tom remains a leader in the Man and Biosphere program and is a founder of the Southern Appalachian Man and Biosphere (SAMAB) Cooperative.  Most recently, Tom has led the SAMAB collaboration for the Conservation of Culturally Significant Plants with the Eastern Band of the Cherokee Indians, and he is working to engage EEB, Department of Forestry Wildlife and Fisheries, and the Environmental Science Division at Oak Ridge National Lab in SAMAB leadership. 

Tom is and has been for a long time, a world’s leader in international conservation, the preservation of public lands, and human resource development. At 93 years of age, Tom remains a visionary who is actively and energetically engaged in conservation initiatives. Tom Gilbert is recognized with the 2021 UT National Alumni Association Award for Professional Achievement. EEB is in awe and proud of Tom’s achievements. 

Filed Under: newsletter, Uncategorized

A Collaborative Spirit

August 24, 2021 by artsciweb

Message from EEB Head and Associate Heads

In 2020, EEB underwent a ten-year Academic Program Review to evaluate the entire program including our culture, and all aspects of the research and teaching missions of the department. The review committee (with folks from inside and outside of the university) noted that one of the “strongest cultural aspects of the department are its collegiality and collaborative spirit that infuses all they do.” 

Kalisz in the fieldDuring this past unusual year we have drawn on this collaborative spirit to help support one another and our students in many ways. With over a year of largely online learning, faculty and staff have helped each other navigate online teaching by sharing digital expertise, sharing slides and teaching materials, and supporting each other by checking in to see how everyone is doing. We have worked hard to support our students through creative methodologies for courses that may have normally been taught in person in the field or lab, by keeping in contact through virtual meetings and social events and increased communication and sharing of health, mental health and career resources. The excellence of our staff members have kept the main office productive and helpful, have maintained our research and teaching resources and collections and have found new and creative ways to support the department. Graduate students pivoted to teach online while also still figuring out ways to do research safely during a pandemic. Moreover, a motivated diversity committee has worked hard to educate and talk about critical social issues through a virtual diversity reading group to change and improve our understanding as well as create action plans to improve diversity and create a culture of true inclusion and safety within our community. 

While distancing, learning, and working in sometimes very challenging conditions in our homes, EEB has continued to be the collegial and productive department that was noted in our program review. We have graduated more than 45 undergraduate and graduate students over the last year, offered professional development and training for students and have taught all of our normally scheduled courses – even if the format was greatly modified – to prevent bottlenecks that might limit student success. 

Our research mission has continued and expanded with faculty and students working on reviews, new virtual collaborations, backyard experiments, and many other creative ways to create and apply knowledge in ecology and evolutionary biology. This year EEB students and faculty have 68 active grants from multiple agencies totaling more than $6 million (Professors Budke and Sheldon both won prestigious NSF CAREER awards), fellowships (Maryrose Weatherton won a NSF Graduate Research Fellowship), and national and local awards (Amanda Hyman won the Cheek Graduate Student Medal of Excellence, Professor Derryberry won Professional Promise in Research & Creative Achievement awards). The list is too long to include here, but we include here a list of all the award winners in the 2020-21 academic year. Our faculty and students have continued to publish important and high-profile papers. 

The EEB seminar series hosted 24 national and international virtual speakers to expand the knowledge and the professional networks of students and faculty. We celebrate all of these successes as well as acknowledge all of the struggles that have also occurred. 

While this year has been difficult, stressful, as well as transformative in so many ways, the people that make EEB what it is have been resilient. We look forward to a time, hopefully soon, when we can celebrate this resilience in person. 

Susan, Brian and Jen

Filed Under: newsletter, Uncategorized

Sharing a Love of Insects and Plants

August 24, 2021 by artsciweb

laura russoLaura Russo, assistant professor of ecology, conducts research revolving around win-win scenarios, from the level of mutualistic interactions between microbial symbionts and insects, to plants and insects, all the way to mutually beneficial outcomes between agriculture and conservation. Within these themes, Russo has studied the impact of species invasions on mutualistic community interactions (implementing some basic network theory) coevolution between plants and their floral visitors, and the impacts of human land-use on interaction structure, including agrochemical run-off. 

“I often study interactions between individual plants and their pollinators in a variety of land-use types and lately I’ve been particularly interested in pollinator nutrition and how it relates to human nutrition,” Russo said. “I’ve implemented both empirical and theoretical methods, and I enjoy using both in complementary ways.”

Examples include using experiments to guide theory, and theory to produce predictions that Russo can test empirically. She has worked in biology, entomology, botany, and ecology departments at many universities around the world, including Penn State, Cornell, Trinity College Dublin, and the University of Queensland, Australia. Russo has also collaborated with dozens of researchers from many countries. 

“I love working and teaching in the field, and I especially love teaching field courses,” Russo said. “I’ve taught such courses in Kenya, Costa Rica, and Australia. My outreach with local communities often revolves around working with homeowners and schools who are interested in promoting pollinating insects in their gardens.”

Russo’s goal is to share her appreciation and love of insects and plants – especially the diversity of bees. One of her methods is macro-photography. 

“I grew up in a military family and moved many times since the beginning of my academic career, living a very nomadic life,” Russo said. “This has been both a challenge and a delight for me, as I must learn the ecology of each new place that I live, and to recognize the common species of the region after each move.”

Filed Under: newsletter, Uncategorized Tagged With: newsletter

The Legacy Continues

August 24, 2021 by artsciweb

The legacy of Biology in a Box lives on after Susan Reichert’s retirement with new Director Elizabeth Derryberry and former Associate Director Kashina Hickson who are taking Biology in a Box in many new exciting directions. 

biology-boxFor example, activity bags were built as a collaboration between Biology in a Box, McClung Museum, the Departments of Ecology and Evolutionary Biology (EEB) and Earth and Planetary Sciences (EPS) for Darwin Day 2021. Previously, in-person activities were organized for a family fair on Darwin Day. The challenge in 2020 was to create an activity for kids that could be done at home. McClung Museum organized the concept and layouts while EEB and EPS faculty created the content. 

Derryberry, Hickson, and EEB graduate students Ruth Simberloff and Amy Luo created bird activities. The bag includes an introduction to bird song, vocabulary words, a checklist for sighting local birds that includes photos and QR codes for their songs, and a separate card that kids can turn into a bird mask. 

More than 120 Darwin Day activity bags were distributed through the local Boys & Girls club, which included students enrolled from Inskip Recreation Center, Norwood Elementary, and Deane Hill Center. Similar activity bags will be distributed through two local schools as an ongoing collaboration between McClung Museum and Biology in a Box. 

The Biology in a Box program is also developing new educational materials through a number of faculty grant broader impacts, including collaborations with EEB Assistant Professor Kimberly Sheldon and EEB Professor Nina Fefferman. Stay tuned for more new developments, including a new library lender program for boxes and a graduate student advisory board. 

Read more about our Biology in a Box outreach program. 

Photo credits: Leslie Chang-Jantz

Filed Under: newsletter, Uncategorized

Underground fungal relationships key to thriving plants

October 29, 2019 by artsciweb

Stephanie Kivlin

For a plant to thrive, it needs the help of a friendly fungus–preferably one that will dig its way deep into the cells of the plant’s roots.

Plants live in symbiosis with root-associated, or mycorrhizal, fungi. The fungi provide up to 80 percent of the nutrients and water a plant needs to grow, and the plants produce up to 30 percent of the photosynthate–a food substance made through photosynthesis–that the fungi need.

There are two main types of mycorrhizal fungi – arbuscular and ectomycorrhizal. An arbuscular mycorrhiza penetrates the cortical cells of the roots of a plant. Ectomycorrhizal fungi do not penetrate the plant’s cell walls, instead forming a netlike structure around the plant root.

A new paper published in the Proceedings of the National Academy of Sciences and co-authored by ecologist Stephanie Kivlin, an assistant professor at the University of Tennessee, Knoxville, shows that arbuscular mycorrhizal fungi are especially helpful to the plants they colonize.

“Mycorrhizal fungal associations below the ground are one of the largest influences on plant tissue nutrient concentrations,” said Kivlin. “To optimize plant nutrition, we need to incorporate mycorrhizal associations into our agricultural and management frameworks.”

Arbuscular mycorrhizal fungi increase plant nutrient concentrations in plant leaves, litter, and roots more than ectomycorrhizal fungi. The type of root-associated fungi present has more influence on a plant’s nutrient levels than plant leaf traits or plant associations with nitrogen-fixing bacteria.

Kivlin’s co-authors are Colin Averill from ETH Zürich, Jennifer M. Bhatnagar and Michael C. Dietze from Boston University, and William D. Pearse from Utah State University.

The study analyzed more than 17,000 trait observations from nearly 3,000 woody plant species in six categories that demonstrate how readily the plant uses nutrients: the nitrogen and phosphorous concentrations in green leaves, senescent leaves–leaves that are about to fall off or have recently fallen off–and roots. It looks at how mycorrhizal effects vary across environments, doing similar analyses in boreal, temperate, and tropical latitudinal zones.

The Kivlin Lab studies the effects of global change on the distributions, function, and ecosystem consequences of plant mycorrhizal fungal associations worldwide.

“The next steps are to understand if there is variation in nutrient acquisition among fungal species within each mycorrhizal group and how soil nutrient concentrations may interact to influence plant nutrient concentrations with global change,” Kivlin said.

Filed Under: faculty, Faculty, Kivlin, MAIN, Uncategorized

2018 Mini-Term Courses

April 10, 2018 by artsciweb

We are pleased to offer three mini-term courses this year. We are confident that you will love each of these courses. Email kcoulte4@utk.edu to override pre-req

Natural History of the Smokies – 70213 – CRN 461-001
“Natural History of the Great Smoky Mountains”. This course is a field ecology course that includes a one-week field trip. Course Fee of $350 to cover housing, transportation & food. Questions? Contact Gary McCracken or Randy Small **This course can be petitioned to count for a “Field or Lab Emphasis Course” for the EEB concentration**

Avian Diversification – 70235 – EEB 461 – 002
Avian Diversity will provide a general overview of avian systematics, evolution, ecology, and behavior. Other special topics will include physiology, migration and orientation, mating systems and parental behavior, communication, and conservation biology. Students will be expected to actively participate in class discussions. duration: 3 week course from May 9 – 30 times: 3 days/week in class: Dabney-Buehler Hall 575, 1-4pm, 2 days/week outdoors: mornings to early afternoon.

Theory in Ethnobiology – 70260 – EEB 461 – 004
What are the theories and hypotheses commonly tested in ethnobiology? What types of data are collected to test these hypotheses? How are these data analyzed to understand the link between plant and culture, the way in which human, by selecting certain organs on certain plant species in specific location, and at some specific time, have shaped their environment? How environmental feedback constrained the nature and extent of human-plant interactions? The ultimate goal of this class is to guide students in conducting hypothesis/theory-driven research in ethnobiology. We will review various theories and hypotheses in ethnobiology. Second, we will learn the different methods used in ethnobotanical research and finally we will identify the major types of data commonly collected in this field and how these data are analyzed. At the end of this course students will be able to develop and test simple hypotheses in ethnobiology and discuss how they fit into the broad ethnobiology literature. Although this course method is applied to ethnobiology, the course can be of interest to students interested in learning about how to use the scientific method in biology in general.

Filed Under: field course, Gaoue, Great Smoky Mountains NP, MAIN, McCracken, Nyari, Small, Uncategorized

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