“…Myriad guidelines and regulations developed to implement these concepts potentially affect management activities and the spatial structure of managed forest landscapes (e.g., rotation length, riparian buffer width, harvest method, regeneration method, retention patches, corridors, set-asides, cut-block size, green-up requirements), but they can sometimes have considerable economic cost (e.g., Barrett et al, 1998;Carter et al, 1997;Gustafson and Rasmussen, 2002;Hummel and Calkin, 2005;Kant, 2002;Nieuwenhuis and Tiernan, 2005;Ohman, 2000;Onal et al, 1998). The benefits of habitat features such as corridors are rarely known quantitatively (see Hannon and Schmiegelow, www.elsevier.com/locate/foreco Forest Ecology and Management 232 (2006) [56][57][58][59][60][61][62][63][64][65][66][67] 2002; Loehle et al, 2002).…”