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| meadow vole | |
|---|---|
| Name | Meadow vole |
| Status | LR/lc |
| Status system | IUCN3.1 |
| Genus | Microtus |
| Species | pennsylvanicus |
| Authority | (Ord, 1815) |
meadow vole
The meadow vole is a small North American rodent of the genus Microtus, notable for its high reproductive rate and role in grassland and wetland ecosystems. Widely studied by ecologists associated with institutions such as Smithsonian Institution, National Science Foundation, and universities including Harvard University and University of Minnesota, the species serves as a model in research on population dynamics, landscape ecology, and predator–prey interactions. Populations influence agricultural practices, wildlife management policies set by agencies like the United States Fish and Wildlife Service and provincial wildlife departments across Canada.
The species was described by Charles Ord in 1815 and placed in the genus Microtus, which contains numerous vole species studied by taxonomists at museums such as the American Museum of Natural History and institutions like the Natural History Museum, London. Molecular phylogenetics work by labs at University of California, Berkeley and Cold Spring Harbor Laboratory has clarified relationships among Microtus taxa, linking this species to clades examined alongside researchers from University of Michigan and Yale University. Vernacular names have varied regionally in reports from the Canadian Wildlife Service and state natural heritage programs; historical records in archives including the Library of Congress document early common names in colonial-era field notes.
Adults are compact, with dense fur and a short tail; morphological measurements are detailed in field guides produced by the National Audubon Society and manuals from the American Society of Mammalogists. Museum specimen catalogs at the Smithsonian National Museum of Natural History and the Field Museum provide standard metrics used by naturalists for identification. Coloration and dental formula distinctions are diagnostic in keys authored by researchers at Cornell University and published in journals like Journal of Mammalogy.
The native range spans large portions of Canada and the United States, with occurrence records maintained by biodiversity databases such as the Global Biodiversity Information Facility and regional atlases compiled by provincial agencies like Ontario Ministry of Natural Resources. Habitats include meadows, marshes, and riparian corridors monitored in studies from Yellowstone National Park and managed lands like Prairie National Wildlife Refuge. Landscape-level work by ecologists affiliated with the US Geological Survey and conservation planning by organizations like The Nature Conservancy document its role in grassland and wetland mosaics.
Behavioral ecology investigations at universities including University of Wisconsin–Madison and McGill University have revealed social structure, territoriality, and population cycles influenced by factors studied by researchers associated with the Long-Term Ecological Research Network. Movement and dispersal patterns are tracked using methods developed at Duke University and technological innovations from labs at Massachusetts Institute of Technology. The species' impact on plant community composition is a topic in collaborative projects with the United States Department of Agriculture.
Foraging studies reported in publications from Iowa State University and University of Nebraska show a diet of grasses, sedges, and seeds, with seasonal shifts documented in surveys conducted by the Bureau of Land Management and state agricultural extension services. Nutritional ecology work tied to the Rockefeller University and seed predation experiments at research stations like those operated by University of Florida inform management of crop depredation described in reports from the United States Department of Agriculture.
Reproductive parameters—breeding seasonality, litter size, and gestation—are characterized in longitudinal studies run by the Canadian Wildlife Service and academic groups at University of British Columbia and Pennsylvania State University. Life history models incorporating data from the Long-Term Ecological Research Network and demographic syntheses published by researchers at Princeton University help explain boom-and-bust population dynamics relevant to regional wildlife management plans overseen by state departments such as the Pennsylvania Game Commission.
Predation pressure from raptors like the Red-tailed hawk and Barn owl, mammalian predators including Red fox and Weasel (Mustela), and indirect effects from large carnivores monitored by agencies such as the National Park Service structure population outcomes. Threats include habitat loss due to land-use changes assessed by researchers at World Resources Institute and climate-driven range shifts examined by teams at Intergovernmental Panel on Climate Change-affiliated programs. Pest management strategies and mitigation efforts are coordinated with agricultural agencies like the United States Department of Agriculture and provincial ministries.