Species richness estimation of bird communities: how to control for sampling effort?

摘要: Since estimates of total species richness increase with sampling effort, methods to control for this effect need be tested and used. We present seven non-parametric 12 accumulation curve that have been used recently in the ecological literature. To test their performance, we data from bird communities Queen Charlotte Islands, Canada. The performance each method was evaluated by calculating bias precision its against known richness. For our set, two Chao estimators were overall least biased most precise estimation methods, followed jackknife estimators, thus supporting results previous studies. Nonparametric tended perform better than models. Most had problem they underestimate early samples, but slightly overestimated it late samples. briefly discuss practical use these which may greatly ability answer questions guide conservation decisions, especially species-rich tropical communities.