Journal of Ecology Explore this journal > Explore this journal > Previous article in issue: Biological Flora of the British Isles: Dryopteris carthusiana, D. dilatata and D. expansa Previous article in issue: Biological Flora of the British Isles: Dryopteris carthusiana, D. dilatata and D. expansa View issue TOC Volume 100, Issue 4 July 2012 Page 1064 CorrigendumFirst published: 17 May 2012Full publication historyDOI: 10.1111/j.1365-2745.2012.01991.xView/save citationCited by: 0 articles Citation tools Set citation alert Check for new citations Citing literature ErrataThis article corrects:Forecasting plant community impacts of climate variability and change: when do competitive interactions matter? Volume 100, Issue 2, 478–487, Article first published online: 12 December 2011Enhanced PDFStandard PDF (92.0 KB) Adler, Dalgleish & Ellner (2012) replace the previously published version of their Fig. 1 with the figure below.Figure 1. Open FigureDownload Powerpoint slide Negative frequency dependence as a measure of niche differences. For a focal species i, the slope of the line relating its (log) per capita growth rate to its frequency in the community is a measure of the difference between the strength of intra- and interspecific competition and therefore a measure of niche differentiation for that species (also see Appendix A). The effect of the competitor species j on itself, αjj, and its effect on the focal species, αij, influence both the low-density growth rate (the y-intercept) and the equilibrium abundance (the x-intercept) of the focal species. In contrast, the effect of the focal species on itself, αii, and its effect on the competitor species, αji, only influence relative abundance. Therefore, an increase in the ratio αii/αji must steepen the slope of the relationship and reflects an increase in self-limitation relative to limitation of heterospecifics. As self-limitation grows stronger (e.g. the shift from the solid black to the dashed line), the focal species becomes less sensitive to interspecific competition. Therefore, species with steep (negative) slopes in a plot of per capita growth rate versus relative abundance should experience weak indirect effects of climate change.