Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

We test the robustness of a method for estimating abundance that assumes that the underlying distribution of the nonzero observations is lognormal (Pennington, 1983, Biometrics 39, 281-286).

You can request these distributions with the BETA, EXPONENTIAL, GAMMA, LOGNORMAL, NORMAL, and WEIBULL options, respectively. If you do not specify a distribution option, a normal P-P plot is created.

This is a preview. Log in through your library . Abstract 1. Of the many model for species-abundance distributions (SADs), the lognormal has been the most popular and as been put forward as an ...