Genetic analysis shows that the Eastern Massasauga hibernacula at Carlyle Lake are genetically distinct units.
Once found across the northern two-thirds of Illinois, populations of the Eastern Massasauga have declined, with only one known population remaining in Illinois. Our long term studies have found the top four sources of mortality to include automobiles, predation, management related mortality (prescribed burns, mowing, etc), and disease. Our current study indicates that efforts to address these ecological threats may not be enough to save this imperiled species.
The area under what is now known as Carlyle Lake was a floodplain valley known as Boulder Bottoms. The creation of Carlyle Lake in the 1960s flooded this area, separating habitats on the the east and west sides of the Kaskaskia River, pushing wildlife, including the Eastern Massasauga, to the edges between the lake and agricultural fields. These bands of habitat are separated by the lake, paved roads, agriculture, and urbanization, potentially limiting migration and gene flow between patches.
Our current study looked at 327 genetic samples collected between 1999 and 2015 from individuals at 9 hibernacula across 3 study areas at Carlyle Lake. Study sites separated by up to 5 km had limited gene flow, as did hibernacula separated by a few hundred meters. This restriction of gene flow increases the vulnerability of these already imperiled populations.
Our study indicates that conservation and recovery efforts need to consider genetic rescue efforts in addition to reduction of ecological threats. Such efforts may include translocations and captive rearing to reduce the impacts of inbreeding depression and genetic drift. Even short distance translocations between the different study areas at Carlyle Lake could help restore gene flow impeded by contemporary human created fragmentation.
Anthonysamy, Whitney J.B., Michael J. Dreslik, Sarah J. Baker, Mark A. Davis, Marlis R. Douglas, Michael E. Douglas, and Christopher A. Phillips. 2022. Limited gene flow and pronounced population genetic structure of Eastern Massasauga (Sistrurus catenatus) in a Midwestern prairie remnant. PLOS ONE: https://doi.org/10.1371/journal.pone.0265666
We are seeking a Senior Scientific Specialist, Pollinator Ecologist to conduct basic and applied research assisting with ongoing surveys for pollinator Species of Greatest Conservation Need (SGCN), focusing on bumblebees and butterflies. This position will be located in Champaign, Illinois. BS required – MS preferred
To Apply: Please complete your candidate profile at http://jobs.illinois.edu and upload a cover letter, CV/resume, and the contact information for three professional references by March 8, 2022.
This is the third intergovernmental agreement between the INHS and the Illinois Tollway and will allow the continuation of this mutually beneficial partnership that began in 2005.
The partnership has grown from monitoring Blanding’s Turtles in the Des Plaines River Valley to a multi-disciplinary program. While the key function is to provide the ecological knowledge necessary to comply with state and federal regulations, both organizations share a goal of studying the natural resources of the region to protect them into the future.
The first cooperative project is with the Iowa and Illinois Department of Natural Resources, allocated at $499,797 for the joint project titled “Blanding’s Turtle Conservation in Iowa and Illinois, 2022 through 2024”. The project team from the Illinois Natural History Survey (INHS) and National Great Rivers Research and Education Center (NGREEC) comprises Ethan J. Kessler, Michael J. Dreslik, Andrew R. Kuhns, and John A. Crawford. The team was awarded $249,449 for their portion of the project, “Population Assessment and Space Use in a Kankakee Sands Region Blanding’s Turtle Population.” While much work has been done on Blanding’s Turtle populations in the Chicagoland region, this project focuses on lesser-known populations in the Kankakee Sands Conservation Opportunity Area.
The grant will facilitate an intensive capture-mark-recapture study to determine population size and begin to collect demographic data. A subset of turtles will be tracked using radio telemetry and GPS trackers to monitor survival and determine space and habitat use. The data is necessary to determine the amount and extent of suitable habitat available on the landscape and address causes of mortality for this population. The work will build on previous research on Blanding’s Turtles in Illinois and further inform conservation planning.
The second cooperative project is with the Minnesota Department of Natural Resources allocated at $247,892 for the joint project titled, “Regional Assessment of Widespread Mussel Declines: a Multistep Approach to Examine Potential Causes.” The project team from the INHS comprises Sarah A. Douglass and Alison P. Stodola while INHS alum Bernard Sietman will lead Minnesota’s portion. The INHS team was awarded $113,364 for their portion of the project. Freshwater mussels, an ecologically important component of river ecosystems, are experiencing widespread declines. With the award, Douglass and Stodola will investigate potential causes for these declines with the goal of informing conservation guidelines and recovery planning. Additionally, this study is an expansion of a largescale, cooperative project spearheaded by Dr. Wendell Haag, US Forest Service Research Fisheries Biologist, and American Rivers to examine causes of freshwater mussel declines across North America.
Researchers will assess pairs of rivers with similar historic mussel assemblages, comparing a river with relatively intact mussel assemblages and a river with a degraded assemblage. They will develop health metrics and assess habitat characteristics to identify potential causal factors of decline. Juvenile mussels will be propagated and used to assess health in response to potential causes of decline. Another part of the project will use eDNA and targeted sampling to update knowledge of Salamander Mussel populations in Illinois and Minnesota. The research will build on a pilot project previously undertaken by Douglass to use eDNA to detect the critically imperiled species and its host, the Mudpuppy salamander.
In granting these awards, USFWS recognizes the necessity of these two projects to further the goals of the Illinois Wildlife Action Plan to conserve imperiled species and their habitats.
Sarah Douglass, was announced as the 2021 Philip Smith Memorial Award Winner. Her submission was titled “Using environmental DNA (eDNA) to detect a rare freshwater mussel species, Salamander Mussel Simpsonaias ambigua, in the Embarras River, Illinois”. Sarah is an Malacologist with the Illinois Natural History Survey.
This year, the Wild Things Conference will be virtual and held over two weekends, with live events as well as pre-recorded talks. UBAP ornithologist Asya Rahlin and her collaborators Stephanie Beilke (Audubon Great Lakes), and Libby Keyes (Governors State University) will have a streaming session going during both weekends of the conference.
Their talk, “A New Bird Banding Station Lands in Chicago” will discuss their project establishing a bird banding station at Big Marsh in the Calumet Region.
Learn about the Chicago Ornithological Society’s bird banding station, which debuted at Big Marsh in 2020, and what they hope to find from using this new banding station to spur research and outreach in the Calumet region.
PACE Lab graduate student Devin Edmonds has been working to save one of the most threatened amphibian species in Madagascar. Listen to an interview he did with Amphibiacast about Mantella frogs, his time working in Madagascar, and his graduate research to conserve the Harlequin Mantella. A new conservation action plan will be released in the coming months.