2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/21/2019 | 2:15 PM - 2:30 PM | FLOOD DYNAMICS DRIVE THE SPATIAL DISTRIBUTION OF RUSSIAN OLIVE INVASIONS ON A RIVERINE FLOODPLAIN | 151 DEF
FLOOD DYNAMICS DRIVE THE SPATIAL DISTRIBUTION OF RUSSIAN OLIVE INVASIONS ON A RIVERINE FLOODPLAIN
Russian Olive (Elaeagnus angustifolia) invasions are pervasive on North American rivers, yet mechanisms governing Russian Olive distributions on floodplains remain unclear. We hypothesized that habitat suitability and propagule pressure are influenced by flood inundation frequency, and therefore predicted a strong spatial association between inundation return interval and Russian Olive occurrence. We conducted a geospatial analysis relating Russian Olive distribution and density to flood inundation zones associated with frequent (i.e., the 1.5-year) to infrequent (i.e., the 500-year) flood return intervals in our study area, the Yellowstone River at Fort Keogh, Montana. The distribution of Russian Olive was highly spatially associated with zones of frequent inundation. Specifically, the 1.5-year to 10-year inundation zones comprise only 35% of the study area, but contain 81% of Russian Olive cover. These findings suggest that hydrochory (waterborne seed dispersal) may be an important mechanism and that frequent flooding may enhance Russian Olive habitat suitability.
- Floodplain
- Plants
- Distribution
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Presenters/Authors
Ann Marie Reinhold
(), Montana State University, Montana Institute on Ecosystems, reinhold@montana.edu;
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Natalie M. West
(), USDA-ARS Pest Management Research Unit, Natalie.West@ARS.USDA.GOV;
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Erin K. Espeland
(), USDA-ARS Pest Management Research Unit, deceased;
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Geoffrey Poole
(), Montana State University, Montana Institute on Ecosystems, gpoole@montana.edu ;
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