Notes: EstimateS 8.2.0 does not work under Mac OS 10.7 (Lion). A new version is under development that is fully compatible with Lion. Meanwhile, Mac users will need to use a computer with Mac OS 10.6 (Snow Leopard) or with Windows 7.
EstimateS 8.2.0 has been used succcessfully under Mac OS 10.6 (Snow Leopard) on Macs, Windows 7 on PCs, and Windows 7 on a Mac under Parallels.
The new version of EstimateS will implement all the new tools for rarefaction and extrapolation of species accumulation curves developed in:
Colwell, R. K., A. Chao, N. J. Gotelli, S.-Y. Lin, C. X. Mao, R. L. Chazdon, and J. T. Longino. 2012. Models and estimators linking individual-based and sample-based rarefaction, extrapolation, and comparison of assemblages. Journal of Plant Ecology 5:3-21.
Read it or download the pdf by clicking here.
EstimateS 8.2.0 updates 8.0.0 with the addition of exponential Shannon diversity (eH ) computation (with sample-based rarefaction), and several bug fixes.
EstimateS 8.2.0 is ready to download now
The new version builds on the familiar tools of its predecessors. Between November, 2006, and July, 2009, EstimateS was downloaded more than 26,000 times by users in more than 100 countries around the globe. Total downloads in the past decade exceeds 60,000. Currently there are about 25 downloads per day.
New in EstimateS 8.2.0:
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In the Diversity Indexes output, the exponential form of Shannon diversity ( eH ) and its conditional standard deviation are reported (as well as H itself, using natural logarithms, as in previous versions).
- Bugs fixed:
- In Version 8.00 (but not in earlier versions), the application froze if the Diversity Indexes option was checked and one or more samples in the input dataset were completely empty (no individuals of any species). This bug has been fixed in Version 8.20.
- In Version 8.00 and Version 7.52, the Morisita-Horn similarity index computations experienced an untrapped overflow when input numbers were extremely large, yielding nonsensical results (including M-H values less than zero and greater than unity). This bug has been fixed in Version 8.20.
- Under some conditions, Version 8 did not read Biota output files correctly. This bug has been fixed in Version 8.20.
New in EstimateS 8.0.0:
- Built around a new version of 4D Engine that ensures compatibility with the latest operating systems.
- Option to export results from n individual randomizations to a text file, allowing computation of precision, accuracy, and other analyses.
- Improved detection and reporting on input file problems.
- Corrected all known bugs in previous versions, including an error in confidence interval computations for Chao1 and Chao2 (with generally minor effects).
With these classic features of previous versions:
- Computes Colwell and Mao's smooth species accumulation curves (sample-based rarefaction curves) with true confidence intervals, based on analytical formulas (Ecology 85, 2717-2727, 2004).
- Computes a wide range of species richness estimators for abundance and incidence (presence/absence) data (Chao, Jackknife, ICE, ACE and others).
- Computes asymmetric (log-transformed) confidence intervals for Chao1 andChao2.
- Computes diversity indices (Shannon, Simpson, Fisher's alpha).
- All richness estimators and diversity indices are computed for every level of sample accumulation, averaged over resamplings.
- Choice of resampling with or without replacement.
- Computes Chao's shared species estimator for sample pairs.
- Computes Chao's Sørensen and Jaccard similarity estimators (Ecology Letters 8:148-159, 2005).
- Computes classic Jaccard, Sørensen, Bray-Curtis, and Morista-Horn similarity indices for sample pairs.
Click here to download EstimateS 8.2.0 now. |
