Tsung-Jen Shen
National Chung Hsing University
36 Papers
125 Citations
Tsung-Jen Shen is an academic researcher from National Chung Hsing University. The author has contributed to research in topics: Abundance (ecology) & Estimator. The author has an hindex of 10, co-authored 29 publications. Previous affiliations of Tsung-Jen Shen include National Tsing Hua University.
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Papers
A new statistical approach for assessing similarity of species composition with incidence and abundance data
TL;DR: This work provides a probabilistic derivation for the classic, incidence-based forms of Jaccard and Sorensen indices of compositional similarity and proposes estimators for these indices that include the effect of unseen shared species, based on either (replicated) incidence- or abundancebased sample data.
1.9K
Nonparametric estimation of Shannon’s index of diversity when there are unseen species in sample
Anne Chao,Tsung-Jen Shen +1 more
TL;DR: In this paper, a different approach based on unequal probability sampling theory is proposed for the estimation of Shannon's index of diversity when the number of species and the species abundances are unknown.
838
Abundance-based similarity indices and their estimation when there are unseen species in samples.
TL;DR: This work provides a new probabilistic derivation for any incidence-based index that is symmetric and homogeneous and proposes estimators that adjust for the effect of unseen shared species on the authors' abundance-based indices.
Nonparametric prediction in species sampling
Anne Chao,Tsung-Jen Shen +1 more
TL;DR: A simple prediction method is proposed for predicting the number of new species that would be discovered by additional sampling in a continuous-time stochastic model in which species arrive in the sample according to independent Poisson processes and where the species discovery rates are heterogeneous.
79
Application of laplace's boundary‐mode approximations to estimate species and shared species richness
TL;DR: In this paper, the Laplace method was used to estimate the number of resident birds in Hong Kong and the replicated species incidence data recorded by competing teams of the Hong Kong Big Bird Race for the years 1999 and 2000.