A simple method for estimating species abundance from occurrence maps
Article first published online: 10 FEB 2014
© 2014 The Authors. Methods in Ecology and Evolution © 2014 British Ecological Society
Methods in Ecology and Evolution
Volume 5, Issue 4, pages 336–343, April 2014
How to Cite
Yin, D., He, F. (2014), A simple method for estimating species abundance from occurrence maps. Methods in Ecology and Evolution, 5: 336–343. doi: 10.1111/2041-210X.12159
- Issue published online: 9 APR 2014
- Article first published online: 10 FEB 2014
- Accepted manuscript online: 15 JAN 2014 04:36AM EST
- Manuscript Accepted: 24 DEC 2013
- Manuscript Received: 7 MAR 2013
- Guangdong Key Laboratory for Biodiversity Dynamics and Conservation, Sun Yat-sen University
- estimating abundance;
- presence/absence map;
- spatial autocorrelation
The issue of how to estimate species abundance from presence/absence maps has attracted much attention. Several methods have been developed to address this problem. However, those methods either overlook the structure of spatial autocorrelation of species distribution, thus leading to underestimation, or they demand extra information besides presence/absence maps.
This study first developed a new method that takes account of spatial autocorrelation and only requires occurrence maps, without any extra information. This method was further improved by incorporating a correction factor to it. We used an index defined by joint counts of occupied and unoccupied cells to measure spatial autocorrelation and to correct the underestimation of the random placement model.
The performance of our method was compared against four other major methods (random placement model, negative binomial model, Conlisk et al.'s method and Solow & Smith's method) using both simulated and empirical data. The results showed that the performance of our method is comparable with other methods but requires less and readily obtained input data, a property important for real applications.
We suggest this simple, data-parsimonious method be a useful alternative to the currently available methods for estimating abundance from occurrence.