Welcome!

Our lab at Holden Arboretum focuses on understanding the complex relationships between plants and their environment, and the evolution of plant physiological adaptations.

We employ techniques from eco-physiology and evolutionary ecology to investigate:

  • leaf, xylem and root adaptations
  • whole plant co-ordination of function
  • the effects of climate change
  • plant responses to stressful environments

Contact us: jmedeiros <at> holdenfg <dot> org

Holden Research Webpage

ResearchGate Page

Follow us on Bluesky @julianamedeiros.bsky.social

news, News, NEWS

January 2024 Dr. Juliana Medeiros appointed Editor for IJPS: https://www.journals.uchicago.edu/journals/ijps/board

January 2024 New paper published: Simovic M, KE Mueller, SM McMahon and JS Medeiros. In Press. Functional traits and size interact to influence growth and carbon sequestration in urban greenspaces. Functional Ecology. https://doi.org/10.1111/1365-2435.14505 

January 2024 We welcome Yasper Mambrasar to the lab. Yasper recently completed his MS at University of Wisconsin-Madison and will be conducting a one-year research internship funded by the National Science Foundation. Yasper is a plant systematist with extensive field experience working in Indonesia.

September 2023 New paper published: Harbol S, RW Long and JS Medeiros. In press. Juniperus virginiana sourced from colder climates maintain higher ratios of soluble sugars to starch during cold acclimation. Tree Physiology. https://doi.org/10.1093/treephys/tpad115 

May 2023 We welcome summer intern, Lindsey Urban from Denison University, on May 17th.

April 2023 Dr. Medeiros and graduate student, Miranda Shetzer, attended the Azalea-Rhododendron Convention in Atlanta, GA and made a poster presentation.

April 2023 Congratulations to postdoc Dr. Hector Ortiz who will be moving on to a Research Scientist position at Chicago Botanic Garden this summer.

March 2023 Dr. Juliana Medeiros is celebrating her 10-year work anniversary at Holden Forests & Gardens on March 3rd.

February 2023 New paper published: Danielson S, Mascia R, Metzger M, Stuble K, Medeiros JS, Stress-resistant trees are more common in urban than rural forests: A case study of Cleveland, Ohio’s natural parks, Urban Forestry & Urban Greening, Volume 82, 2023, 127864, ISSN 1618-8667, https://doi.org/10.1016/j.ufug.2023.127864.

February 2023 New paper published: Hamati S, Medeiros JS, Ward D (2023) Effects of post oak (Quercus stellata) and smooth brome (Bromus inermis) competition on water uptake and root partitioning of eastern redcedar (Juniperus virginiana). PLoS ONE 18(2):e0280100. Link to Hamati S, Medeiros JS, et al 2023.pdf

January 2023 New paper published by our postdoctoral assistant researcher, Hector Ortiz: Ortiz Cano HG, Hadfield R, Gomez T, Hultine K, Mata Gonzalez R, Petersen SL, et al. (2023) Ecological-niche modeling reveals current opportunities for Agave dryland farming in Sonora, Mexico and Arizona, USA. PLoS ONE 18(1): e0279877.

November 18, 2022 CWRU doctoral graduate student, Sharon Danielson, successfully defended her PhD and graduated. Congratulations, Sharon!

September 2022 Welcome new CWRU graduate student, Miranda Shetzer, to the lab.

08/01/22 Medeiros Lab Photo Summer 2022 We had an impressive crew this summer and the largest lab staff to date. Best of luck to our students and interns as they head back to school this month. Thank you for your hard work and dedication to science!

Front row Left to Right: Miranda Shetzer, Cariana, Sam Harbol, Sabeel Haddad
Back row Left to Right: Sharon Danielson, Juliana Medeiros, Hector Ortiz, Sharon Halkovics

August 30, 2021 Congratulations to postdoc Dr. Randy Long on his appointment as Visiting Assistant Professor at Lewis & Clark College in Portland Oregon.

June 15, 2021 We welcome high school student Hope Ptacek to the lab, Hope will work with postdoc Dr. Randy Long to process conifer leaf samples.

May 29, 2021 Dr. Medeiros was elected as the President of the Great Lakes Chapter of the American Rhododendron Society.

May 24, 2021 We welcome summer interns Miranda Shetzer and Madeline Bednar to the lab. Miranda will work with graduate student Sharon Danielson on a manipulative experiment examining drought responses of urban and rural tree seedlings, while Madeline will work with postdoc Dr. Randy Long to investigate leaf traits of different conifer species from botanical gardens around the US.

May 21, 2021 Dr. Medeiros presented a virtual talk at the American Rhododendron Society Spring Convention entitled “ARS-NG: Connecting the next generation of Rhododendron enthusiasts with the expertise and mentorship of the American Rhododendron Society

May 1, 2021 Dr. Medeiros and colleagues from the American Rhododendron Society launched a podcast entitled “For the Love of Rhododendron”. Available anywhere you get your podcasts, and check out the ARS webpage for educational content related to each episode https://www.rhododendron.org/next_gen_podcasts.htm

March 21, 2021 Dr. Medeiros made a virtual presentation at the Niagara Region Chapter of the American Rhododendron Society. The talk was entitled “Looking back to the past to secure the future of Rhododendron in a changing world.”

March 18, 2021 Dr. Medeiros led the judging team for the Northeast Ohio Science and Engineering Fare Holden Arboretum Special Prize in Plant and Environmental Science.

News Archive

Rhododendron Research Network

Visit our webpage @ rhodo-research.net

Network Mission:

The Rhododendron Research Network is a collaborative working group that enhances participation, value and dissemination of scientific discoveries in Rhododendron.

Network Goals:

   1. Promote Rhododendron as a study system in plant physiology, pathology, ecology, evolutionary biology, plant breeding, genetics, horticultural sciences, conservation biology, ethnobotany, and medicinal chemistry.

   2. Promote the ARS and associated botanical gardens as a resource for Rhododendron research and public engagement, and foster participation and membership of scientists in the American Rhododendron Society.

   3. Create opportunities for communication and collaboration within the international community of Rhododendron researchers, and between scientists and ARS members.