一般影響
花紅小檗(Berberis thunbergii)是一個受歡迎的觀賞植物，出現在花園，公園，森林和自然保護區。它的種子是由鳥類散播，能容忍緻密的遮蔭。當它逃逸到自然田野時，其高耐蔭的特性有助於它在各種棲息地形成密集的植群，包括被樹冠封閉的森林和開闊的林地，濕地，草原，荒地，草地，取代原生的草本植物和灌木植物。
地點特有的影響：Allamuchy State Park (United States (USA)) 
滋擾人類: Kourtev et al. (1998) quotes Ehrenfeld (1996, in Kourtev et al. 1998) stating that "Berberis thunbergii is present in virtually all publicly-owned parks, forests, and nature preserves in New Jersey and surrounding areas." Highlands Province (United States (USA))
滋擾人類: Kourtev et al. (1998) quotes Ehrenfeld (1996, in Kourtev et al. 1998) stating that "Berberis thunbergii is present in virtually all publicly-owned parks, forests, and nature preserves in New Jersey and surrounding areas." Morristown National Historical Park (United States (USA))
滋擾人類: Kourtev et al. (1998) quotes Ehrenfeld (1996, in Kourtev et al. 1998) stating that "Berberis thunbergii is present in virtually all publicly-owned parks, forests, and nature preserves in New Jersey and surrounding areas." Valley and Ridge Province (United States (USA))
滋擾人類: Kourtev et al. (1998) quotes Ehrenfeld (1996, in Kourtev et al. 1998) stating that "Berberis thunbergii is present in virtually all publicly-owned parks, forests, and nature preserves in New Jersey and surrounding areas." Worthington State Forest (United States (USA))
滋擾人類: Kourtev et al. (1998) quotes Ehrenfeld (1996, in Kourtev et al. 1998) stating that "Berberis thunbergii is present in virtually all publicly-owned parks, forests, and nature preserves in New Jersey and surrounding areas." United States (USA)
競爭: Berberis thunbergii has negative impacts on co-occuring species by suppressing biomass production. It is observed that recovery of these species after japanese barberry removal is slow except under high light conditions. Japanese barberry forms dense stands in a variety of habitats, and becuase of its shade-tolerance it displaces a variety of native herb and shrub species in areas where it is well established (Swearingen et al 2002). New York (United States (USA))
競爭: Swearingen et al. (2002) state that, "Berberis thunbergii forms dense stands in a variety of habitats, including closed canopy forests and open woodlands, wetlands, pastures, meadows and wastelands. This highly shade-tolerant exotic shrub displaces a variety of native herb and shrub species in areas where it is well established."
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