{"id":16562,"date":"2024-12-21T00:50:23","date_gmt":"2024-12-21T05:50:23","guid":{"rendered":"https:\/\/www.rochester.edu\/college\/ugresearch\/jur\/?page_id=16562"},"modified":"2025-01-09T10:51:12","modified_gmt":"2025-01-09T15:51:12","slug":"engineering-invasion-do-canopy-gaps-created-by-the-north-american-beaver-castor-canadensis-facilitate-terrestrial-plant-invasions","status":"publish","type":"page","link":"https:\/\/www.rochester.edu\/college\/ugresearch\/jur\/engineering-invasion-do-canopy-gaps-created-by-the-north-american-beaver-castor-canadensis-facilitate-terrestrial-plant-invasions\/","title":{"rendered":"Engineering invasion: Do canopy gaps created by the North American beaver (Castor canadensis) facilitate terrestrial plant invasions?"},"content":{"rendered":"
Introduction<\/b><\/h5>\n

North American beavers (Castor canadensis<\/i>) mold the riparian ecosystems they engineer and inhabit. Through selective foraging and the use of woody vegetation for dam and lodge creation, they can significantly impact the composition and structure of near-shore canopy and understory (Donkor & Fryxell, 1999; Rosell et al., 2005). By reducing tree density, these gaps allow for greater light penetration through the forest canopy while decreasing competition for soil and nutrients (Barnes & Dibble, 1988; Johnston & Naiman, 1990).<\/p>\n

Invasions of non-native plants have been demonstrated to increase in frequency and severity in the wake of canopy disturbance (Belote et al., 2008; Lee & Thompson, 2012). In Pennsylvania and New Jersey, Eschtruth and Battles (2009) found that canopy disturbances resulting from hemlock woolly adelgid (Adelges tsugae<\/i>) infestation and propagule pressure were associated with intensified invasions of garlic mustard (Alliaria petiolata<\/i>), Japanese barberry (Berberis thunbergii<\/i>), and Japanese stiltgrass (Microstegium vimineum<\/i>). Gaps created by logging in Hawaiian forests resulted in greater availability of light and nitrogen that promoted the spread of invasive plants (Loh et al., 2008). In California\u2019s redwood forest, increased light availability was also a vital resource in plant species invasions, as unshaded plots had a greater proportion of invasive species than nearby shaded plots (Blair et al., 2010).<\/p>\n","protected":false},"excerpt":{"rendered":"

Introduction North American beavers (Castor canadensis) mold the riparian ecosystems they engineer and inhabit. 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