In this paper, we investigate the following discrete n-species competition system with feedback controls:xi (k + 1) = xi (k) exp fenced(bi (k) - underover(∑, j = 1, n) aij (k) xj (k) - underover(∑, j = 1, j ≠i, n) cij (k) xi (k) xj (k) - di (k) ui (k)),Δui (k) = ri (k) - ei (k) ui (k) + fi (k) xi (k), i = 1, 2, ..., n,which describes the effect of toxic substances and age structures simultaneously. Some sufficient conditions are established on the permanence and the global stability of the system. These results are also applied to some special cases. ©2007 Elsevier Ltd. A...
