Spatial Neutral to the Right Species Sampling Mixture Models

精确的两阶段有限混合表示用于物种采样过程

Exact two-stage finite-mixture representations for species sampling processes

本文提出了一种精确的两阶段有限混合表示，用于物种采样过程，通过隐含的截断指数和简单的重新加权，实现了对任意规范物种采样过程的精确构造，并展示了其在后验推断中的应用。

Estimating abundance-based generalized species accumulation curves

The number of species can be estimated by sampling individuals from a species assemblage. The problem of estimating generalized species accumulation curve is addressed in a nonparametric Poisson mixture model. A likelihood-based estimator is proposed and illustrated by real examples.

Bayesian Multi-Species N-Mixture Models for Unmarked Animal Communities

We propose an extension of the N-mixture model which allows for the estimation of both abundances of multiple species simultaneously and their inter-species correlations. We also propose further extensions to this multi-species N-mixture model, one of which permits us to examine data which has an excess of zero counts, and another which allows us to relax the assumption of closure inherent in N-mixture models through the incorporation of an AR term in the abundance. The inclusion of a multivariate normal distribution as prior on the random effect in the abundance facilitates the estimation of …

面向多源观测数据的空间联合物种N-混合模型及其在野生鹿种群丰度中的应用

Spatial Joint Species N-Mixture Models for Multi-Source Observational Data with Application to Wild Deer Population Abundance

本文针对爱尔兰三种野生鹿的多源空间错位数据，提出空间联合物种N-混合模型，以同时建模多个物种种群丰度并考虑物种间相关性及生态协变量影响。

Multi-species distribution modeling using penalized mixture of regressions

Multi-species distribution modeling, which relates the occurrence of multiple species to environmental variables, is an important tool used by ecologists for both predicting the distribution of species in a community and identifying the important variables driving species co-occurrences. Recently, Dunstan, Foster and Darnell [Ecol. Model. 222 (2011) 955-963] proposed using finite mixture of regression (FMR) models for multi-species distribution modeling, where species are clustered based on their environmental response to form a small number of "archetypal responses." As an illustrative exampl…

Cohort aggregation modelling for complex forest stands: Spruce-aspen mixtures in British Columbia

Mixed-species growth models are needed as a synthesis of ecological knowledge and for guiding forest management. Individual-tree models have been commonly used, but the difficulties of reliably scaling from the individual to the stand level are often underestimated. Emergent properties and statistical issues limit their effectiveness. A more holistic modelling of aggregates at the whole stand level is a potentially attractive alternative. This work explores methodology for developing biologically consistent dynamic mixture models where the state is described by aggregate stand-level variables …