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Germination of Invasive Plant Seeds after Digestion by Horses in California

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dc.creator Quinn, Lauren D.
dc.creator Kolipinski, Mietek
dc.creator Coelho, Vânia R.
dc.creator Davis, Bonnie
dc.creator Vianney, John-Mary
dc.creator Batjargal, Orgiltuya
dc.creator Alas, Monika
dc.creator Ghosh, Sibdas
dc.date 2020-02-12T07:35:43Z
dc.date 2020-02-12T07:35:43Z
dc.date 2008-10
dc.date.accessioned 2022-10-25T09:21:00Z
dc.date.available 2022-10-25T09:21:00Z
dc.identifier DOI: 10.3375/0885-8608(2008)28[356:GOIPSA]2.0.CO;2
dc.identifier http://dspace.nm-aist.ac.tz/handle/123456789/551
dc.identifier.uri http://hdl.handle.net/123456789/95355
dc.description This research article published by Natural Areas Journal Volume 28 (4), 2008
dc.description Using a unique sterile design intended to eliminate outside seed contamination of horse feces, we investigated whether weed seeds germinate after digestion by horses. Feces were collected from selected National Parks and other locations in central and northern California. All potted fecal samples were irrigated and grown in an enclosed sterile nursery environment. Thirty-two plant species emerged from these fecal samples, 24 of which were not native to California. None of these were identified on the California Department of Agriculture’s Noxious Weed List, which is used as a basis to certify equine feed as weed free. However, seven of the non-native species are identified as moderately invasive on the California Invasive Plant Council’s (Cal-IPC) list. These species are: Hirschfeldia incana, Hordeum marinum, Lolium multiflorum, Mentha pulegium, Rumex acetosella, Trifolium hirtum, and Vulpia myuros. In addition, the following four non-native plants are listed at the limited invasiveness level on the Cal-IPC list: Hypochaeris glabra, Lythrum hyssopifolium, Medicago polymorpha, and Poa pratensis. Because we did not survey invasive plant cover in locations from which we sampled, we cannot guarantee that species identified in our samples would have also germinated in the field. Our results add to a growing body of literature documenting germination of seeds after passing through the digestive system of horses and suggest that conscientious horse owners should select feed sources that are free of weeds. We also find that the current list of noxious weeds used to certify weed-free feed for equines should be comprehensive.
dc.format application/pdf
dc.language en
dc.publisher Natural Areas Journal
dc.subject horse feces
dc.subject horse manure
dc.subject invasive plant germination
dc.subject non-native plants
dc.subject weed seeds
dc.title Germination of Invasive Plant Seeds after Digestion by Horses in California
dc.type Article


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