Observe ENM results in E space, and display ENM results with different thresholds.

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1. Interacting with other ENMs

For user convenience, NicheA can export Ns in formats compatible with Maxent and openModeller. The entrance of this function is under "File" menu, which is named as "Export to ENMs". Additionally, NicheA can open results from these two ENM software in E with a given threshold for distinguishing between presence and absence. This function can help users to analyze relationships between occurrences used for modeling and results based on those occurrences. Fig. 1 outlines the process.

2. Display ENM results with different thresholds.

In this case, we used the result generated from Maxent above.

1. Draw BC with the same environmental layers (or background folder) as above. If you didn't close NicheA, you just need to keep the scenario.

2. Open the ‘result’ folder generated by Maxent, open the noname.1.html to get the threshold we want to use. In this case, we used ‘10 percentile of training presence’ (0.470), ‘Equal training sensitivity and specificity’ (0.494), ‘Maximum training sensitivity plus specificity’ (0.445) and ‘Balance training omission, predicted area and threshold value’ (0.139) as examples.

3. Open the Maxent output as two Ns with the given thresholds above (Fig. 2). This function is under "File" menu which is names as "Open N(s)". In this case, you need to select "As raster file" in the "Select N" list, set up a threshold value in the text field, and pick a suitable colors below.

Note:

We can’t open the same raster file twice. The only solution is to make a copy of the raster file, and open it.

Figure 2. Open an ENM result with different thresholds. The thresholds were ‘10 percentile training presence’ (red), ‘Equal training sensitivity and specificity’ (blue), ‘Maximum training sensitivity plus specificity’ (yellow) and ‘Balance training omission, predicted area and threshold value’ (green). The white ellipsoid was the original N.