Practical Method to Species Richness Estimation in Plant Community

文獻上長期以來將群落中的物種數量當成監測生物多樣性的重要指標。當研究對象為植物群落時，一般常採用區塊抽樣方法。然而在此抽樣模式下，文獻上現有一些物種數估計方法，在抽樣比例小於5%時表現並不理想。以實務應用為出發點，本文提出了一些可行的方法，並與其他估計方法做比較。此外，文獻上的模擬研究大多根據一些假設的母體分佈來生成抽樣的資料，本文則利用兩組經過普查的森林資料當成抽樣母體，再進一步進行電腦模擬驗證，如此的模擬設計比較符合抽樣群落的實際狀況。

關鍵字

森林普查資料；廣義折刀估計法；區塊抽樣方法；生物多樣性指標；種類數估計

並列摘要

Species richness has been viewed as the primary measure for understanding the biodiversity in a community for a long time. If the research interest focuses on a forest community, it is customary to collect data with a quadrat sampling. However, several well-known estimators cannot provide reliable consequences when the fraction of sampling domain is less than 5%, which is a common situation in practice. To meet the practical requirement, this study presents some promising methods that yield encouraging results in light of the various aspects of statistical criterion. Moreover, the evaluation of richness estimators employed two complete census datasets of forest plots to be testing populations rather than using artificial datasets.

並列關鍵字

Forest census data ； Generalize jackknife ； Quadrat sampling ； Richness estimator

參考文獻

Abdul Rahim, N., Nur Supardi, N., Manokaran, M.N., Davies, S.J., La Frankie, J.V., Ashton, P.S., and Okuda, T. (2004). Demographic tree data from the 50-ha Pasoh forest dynamics plot. [CD-ROM] CTFS Forest Dynamics Plot Data Series, Kepong, Malaysia.

Google Scholar

Archaux, F.,Camaret, S.,Dupouey, J.L.,Ulrich, E.,Corcket, E.,Bourjot, L.,Brêthes, A.,Chevalier, R.,Dobremez, J.F.,Dumas, Y.,Dumé, G.,Forêt, M.,Forgeard, F.,Lebret, Picard, J.F.,Richard, F.,Savoie, J.M.,Seytre, L.,Timbal, J.,Touffet, J.(2009).Can we reliably estimate species richness with large plots? an assessment through calibration training.Plant Ecology.203,303-315.