Category Archives: environmental impact

A demographic study of deer browsing impacts on Trillium grandiflorum

A demographic study of deer browsing impacts on Trillium grandiflorum
Plant Ecology, May 2003
Thomas P. Rooney and Kevin Gross

A moderate drought during the study could account for the negative population growth rate, but deer browsing accelerates the rate of decline. Population growth is most sensitive to the proportion of plants remaining in the nonflowering stage, and deer browsing reduces this proportion. Browsing damage was relatively low in this study (5.4% of stems in 1998, 11.5% in 1999) compared to another study of browsing impacts on T. grandiflorum, indicating deer could have far more severe demographic consequences in populations subject to higher levels of browsing.