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   Bromus inermis (grass)    
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         General Impact

    Bromus inermis is a highly competitive C3 grass that forms a dense sod, resulting in smothering and exclusion of other (native) species and decreasing natural biodiversity (ANHP, 2002; Oftinowski et al., 2007). ANHP (2002) writes that "Smooth brome may inhibit natural succession processes...and [serves as an] alternate host for viral diseases of crops." Anemone patens, a long lived native perennial in North American grasslands, is negatively affected by the presence of B. inermis. The thatch left by previous B. inermis growth creates an issue for survival and germination of A. patens seeds (Williams & Crone, 2006). B. inermis has also shown to alter the population dynamics of the dominant native perennial prairie cordgrass (Spartina pectinata). When B. inermis grows in conjunction with native S. pectinata is known to reduce patch growth, decrease colonization rates and increase extinction rates of the native species (Dillemuth et al., 2009). B. inermis is also known to significantly impact the population dynamics and movement behaviour of several native arthropod species in North American prairies (Baum et al., 2004; Cronin 2003a, b, 2007; Cronin & Haynes 2004; Cronin et al., 2004; Haynes & Cronin 2003).

    No Impact information recorded for Bromus inermis

ISSG Landcare Research NBII IUCN University of Auckland