TY - JOUR T1 - Power to detect trends in ecological indicators in the East Usambara Mountains, Tanzania JF - African Journal of Ecology Y1 - 2003 A1 - Newmark, W. D. A1 - Senzota, R. B. M. SP - 294 EP - 298 KW - conservation KW - Dung beetles KW - epiphytes KW - forest KW - hornbills KW - local technicians KW - monitoring KW - primates KW - protocols KW - STATISTICAL POWER AB - We evaluated the statistical power of monitoring protocols to detect, over a 10-year period, trends in indices of abundance of primates, hornbills and forest interior dung beetles and growth rates of epiphytic ferns in the Amani Nature Reserve, in the East Usambara Mountains, Tanzania. Local technicians are responsible for the day-to-day gathering of data. The existing monitoring protocols for blue monkey, silver-cheeked hornbills, trumpeter hornbills, forest interior dung beetles and Asplenium nidus have sufficient statistical power (>0.80) to detect trends of 65% or less over a 10-year period. Monitoring protocols for black and white colobus and Asplenium holstii have lower statistical power (<0.80). We therefore conclude that the majority of monitoring protocols of the East Usambara Ecological Monitoring Project have the capacity both logistically and statistically to detect long-term trends in important functional groups in the East Usambara Mountains. VL - 41 SN - 0141-6707 UR - ://000188226700002 N1 - digital copy ER -