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Title: Invasibility and Effects of Amur Honeysuckle in Southwestern Ohio Forests

Author: Hutchinson, Todd F.; Vankat, John L.; Vankat, John L.;

Date: 1997

Source: Conservation Biology. 11(5): 1117-1124.

Publication Series: Miscellaneous Publication

Description: The Asian exotic Amur honeysuckle (Lonicera maackii [Rupr.] Herder) has become the dominant shrub in many forests in southwestern Ohio and in some other locations in the eastern United States. Our research focused on the invasibility of forest communities and relationships of L. maackii to the abundance of tree seedlings and herbs. We surveyed 93 forest stands near Oxford, Ohio (USA) to determine L. maackii cover, time since invasion, tree canopy cover, tree basal area, and a shade tolerance index. Stepwise multiple regression indicated that greater than one-half of the variation (r2 = 0.550) in Lonicera cover was correlated to five variables (in descending order of importance): tree canopy cover, distance from Oxford, shade tolerance index, tree basal area, and time since invasion. The results suggest that high light levels and proximity to an abundant seed source increase forest invasibility. Tree seedling density, species richness of seedlings, and herb cover were all inversely related to L. maackii cover. When Lonicera becomes abundant, future structure and composition of forests could be affected and local populations of herbs threatened.

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Hutchinson, Todd F.; Vankat, John L. 1997. Invasibility and Effects of Amur Honeysuckle in Southwestern Ohio Forests. Conservation Biology. 11(5): 1117-1124.


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