Finding a forest future:
Ecosystem restoration in anthropogenically transmogrified landscapes
The United Nations has declared 2022-2032 the Decade on Ecological Restoration and in the McEwan lab we are executing a variety of projects that aim to support ecological restoration in the Miami Valley of Ohio, which is our geographic home. These projects are generally focused on facilitating succession of native forests in anthropogenic landscapes that are in a state of reaction to significant human disturbance such as industrial agriculture. This work includes addressing ecological invasions that may limit success of native species and is increasingly focused on soil conditions that may limit the success of native trees.
Invasion ecology of Callery pear (Pyrus calleryana)
Pyrus calleryana has become one of the more problematic invasive species in eastern North America. In the lab we are exploring (a) the profile of traits that enable this species to become invasive, (b) the effects this species has on ecosystems and (c) methods to control the species and restore ecosystems that have been invaded.
A detailed description of the ecology of this species and our research is found here: LINK
Facilitating forest biodiversity and development in anthropogenic landscapes
In the American Midwest industrial agriculture is a dominant land use. When agricultural lands are abandoned, the ecological process of old-field succession is initiated that should, in theory, shift those systems toward native forest conditions. In the modern landscape, abandoned old-fields often become sites of ecological invasion and the success of native trees can be highly limited. In the McEwan Lab we are engaged in a variety of projects that seek to develop techniques for ecological restoration of post-agricultural lands in the Miami Valley.
Publications:
Woods, M.J., G.K. Attea and R.W. McEwan. 2021. Resprouting of the woody plant Pyrus calleryana influences soil ecology during invasion of grasslands in the American Midwest. Applied Soil Ecology 166: 103989. LINK.
Cobb, M., M.J. Woods and R.W. McEwan. 2020. Assessing seed handling processes to facilitate a community-engaged approach to regional forest restoration. Forests 11, 474. https://doi.org/10.3390/f11040474
Woods, M.J., M. Cobb, K. Hickle and R.W. McEwan. 2019. Assessing the efficacy of seedling planting as a forest restoration technique in temperate hardwood forests impacted by invasive species. Forests 10: 699. https://doi.org/10.3390/f10080699
The Urban Watershed Collaborative: Experiential learning and river biology in urban Dayton, Ohio
For over a decade, Dr. McEwan has been PI or Co-PI on contracts with the City of Dayton (Ohio) to establish a measurement protocol for the effects of urban stormflow on the biology of freshwater rivers within the city. This is an exciting project that aligns our scientific activity directly with objectives of the city in which we are located. In this project we have established a training platform for students and created a long-term partnership between the lab and the city. Most recently this project has been led by Dr. Ryan Reihart, here at the University of Dayton.
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Project Images: LINK
Past Projects
Fire ecology and ecosystem dynamics in the Siberian arctic
Dr. McEwan was co-PI on a grant from the National Science Foundation (OPP:1708309) to study fire and ecosystem dynamics in the Siberian arctic. The dominant woody plant in this systems is larch (Larix cajanderi) which has a strong effect on carbon storage. The project focuses on regeneration dynamics of this species in relationship to fire, which is a significant ecosystem disturbance that is increasing in severity through time.
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Two MS theses have been generated by the project so far:
Sarah J. Frankenberg. 2020. Fire, Forest, Ice, and Fungi: Exploring The Mesh Of Relationships Driving Seedling Regeneration In The Siberian Arctic. LINK.
Eric B. Borth. 2019. Drivers of larch regeneration in Siberia. LINK.
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Collaborators on the project include:
Dr. Heather Alexander, Auburn Univeristy (PI): LINK
Dr. Jennie DeMarco, Western State Colorado University (Co-PI): LINK
Dr. Jeremy Lichstein, University of Florida (Co-PI): LINK
Dr. Michael Loranty, Colgate University (Co-PI): LINK
Dr. Michelle Mack, Northern Arizona University (Co-PI): LINK
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Project Images: LINK
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Invasion Ecology of Amur honeysuckle
Overview page is found here: LINK
Conservation biology and habitat management in Bill Yeck Park, Ohio
Dr. McEwan was PI on a grant from the Centerville-Washington Township Park District to develop a habitat management plant for a fascinating property in southwestern Ohio. Bill Yeck Park is approximately 200 acres and contains a wide variety of habitats including meadow, marsh, wetland, riparian forest and upland forest. The goal of the project is to identify habitats of particular interest and provide information towards developing a long-term management plan that will address invasive species, aquatic habitats, and conservation within the context of multi-use management.
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Project Images: LINK
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Link to the Thesis project: LINK
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Link to the Park District Website: LINK
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Fire, gap dynamics and oak regeneration in forests of southwestern Ohio
In collaboration with Dr. Todd Hutchinson at the USFS Delaware station used tree-ring analysis of oak cross sections to assess dynamics in oak forests in relationship to historical wildfires and gap dynamics. This project was led by Peter Butterfield, a MS Thesis student in the McEwan Lab.
This work was supported in part by a grant to the McEwan Lab from the US Forest Service.
Thesis from the project is here: LINK
Causes and consequences of long term forest dynamics
The McEwan Lab has engaged in a constellation of research activities that revolve around the idea of understanding the causes and consequences of long-term forest dynamics. Most of this work has focused on temperate forests of eastern North America; however, the lab also has projects in tropical (Taiwan) and arctic (Siberia) forests.
Biodiversity, carbon storage, and typhoon impacts in subtropical forests of Taiwan
The lab has been engaged in a long-term collaborative project to explore the ecology of subtropical forests in Taiwan. Dr. McEwan was PI on a grant through the Smithsonian Institute Center for Tropical Forest Science which helped launch this collaboration. The overall goal is to understand how biodiversity and ecosystem function are related in the high diversity subtropical broadleaved forests of Taiwan. Two great things about research in Taiwan are (a) the infrastructure for research is outstanding, and (b) some of the forests are heavily typhoon impacted, which acts as an interesting “ecological filter” on which species can persist. This project is part of a long-term, ongoing, collaboration with Dr. Jyh-min Chiang at Tunghai University in Taiwan.
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Long-term dynamics of Lilley Cornett Woods, southeastern Kentucky, USA
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Project Images:
Coarse woody debris survey (Jessica Davis): LINK
Vegetation survey (Julia Chapman): LINK
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Website for Lilley Cornett Woods: LINK
Lilley Cornett Woods McEwan Lab Data Archive: LINK
Bibliography of McEwan Lab Lilley Cornett Woods publications: LINK
Long-term dynamics of Drew Woods, western Ohio, USA
Project Images: LINK
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Drew Woods McEwan Lab Data Archive: LINK
Bibliography of McEwan Lab Drew Woods publications:
Chapman, J.I., A.L. Myers, A. J. Burky and *R.W. McEwan. 2015. Edge effects, invasion, and the spatial pattern of herb-layer biodiversity in an old-growth deciduous forest fragment. Natural Areas Journal 35: 439-451.
Goins, S.M., J.I. Chapman and *R.W. McEwan. 2013. Dynamics and disturbance in an old-growth forest remnant in western Ohio. Natural Areas Journal. 33: 384-394.
Long-term dynamics of Hueston Woods, southwestern Ohio, USA
We completed a project within the Hueston Woods State Nature Preserve (LINK) to assess long term dynamics in a large permanent plot that was originally established in 1981 and was the subject of extensive research by Dr. John Vankat from Miami University. Dr. Vankat transferred leadership of the project to the McEwan Lab and we archived the data and resampled to assess forest dynamics. This project was led by MS thesis student Grace Attea.
Data archive:
Thesis:
Publication:
