Condatis analysis results report.
Job: SabahPA1Prioritise
Analysis Type: Dropping
Name | kaallen |
kaallen@liverpool.ac.uk | |
Date presented | 02/26/2020 19:06:15 |
Time taken for analysis | 0:03:42 |
Input Data and parameters
Habitat layer | Forestundrop.tif |
Source and Target layer | SourceTarget1.tif |
Prioritisation Layer | Forestdrop.tif |
Reproductive Rate (individuals per km2) | 2000.0 |
Dispersal Distance (km) | 4.0 |
Processes
Condatis Version | 1.10 |
Dropping Steps | 10 |
Step type | Cell_Number |
Results
Output files:All files included in zip file SabahPA1Prioritise_results.zip (Click to download)
The zip file includes:
- SabahPA1Prioritise.csv
- SabahPA1Prioritise_summary.csv
- SabahPA1Prioritise_start_flow.tif, .csv
- SabahPA1Prioritise_end_flow.tif, .csv
- SabahPA1Prioritiseend_progress.tif, .csv
- SabahPA1Prioritise_dropping_rank.tif, .csv
- SabahPA1Prioritise_speed_loss.tif, .csv
- SabahPA1Prioritise_autoST.tif
- SabahPA1Prioritise_bottlenecks.shp, .dbf, .prj, .csv
The Help Documentation on the Condatis website provides further information to assist
with the interpretation of Condatis outputs and with troubleshooting,
and can be accessed here.
Maps shown in .tif files can be viewed using a mapping platform,
for example QGIS(free and open source)
or ArcGIS.
Summary of results.
For this landscape of interest, the speed of movement of the modelled species changes from 444.7793 before any habitat is dropped to 0.0000 once all 15569 additional habitat cells are lost. This represents a reduction in speed of 100.0000% with a loss of habitat of 15569 km2 (93.52% of the total habitat area).
Trajectory of dropping

Fig. 1: The speed, (inversely related to the time taken to cross from source to target), is plotted against the stage of dropping. Here the dropping mode is Cell_Number. (The dropping of habitat cells from the Prioritisation layer is performed such that an equal amount of cells are dropped per stage). Speed is expected to get slower when habitat is lost from the landscape, but notice how severely speed is lost at different stages.
Dropping Rank Map

Fig. 2: An illustration of the rank of each habitat cell in the dropping analysis, with each drop stage represented by a different colour on the ramp. The source and target are labelled using MAGENTA █ and CYAN █ respectively. Lower-ranking cells were dropped earliest because they carried relatively little flow. Higher ranking cells were retained longer, and this implies that they are of higher priority. See table 1 for more information on the cells included in each rank.
Step Dropping Summary
Stage | Dropped | Speed | Speed Reduction | Reduction per Cell |
---|---|---|---|---|
Initial | 0 | 444.779268 | 0.000000 | 0.000000 |
1 | 1557 | 444.283717 | 0.495551 | 0.000318 |
2 | 1557 | 439.916432 | 4.367285 | 0.002805 |
3 | 1557 | 433.701748 | 6.214684 | 0.003991 |
4 | 1557 | 421.301069 | 12.400679 | 0.007964 |
5 | 1557 | 406.642873 | 14.658197 | 0.009414 |
6 | 1557 | 381.891774 | 24.751098 | 0.015897 |
7 | 1557 | 344.490884 | 37.400891 | 0.024021 |
8 | 1557 | 293.879650 | 50.611234 | 0.032506 |
9 | 1557 | 163.357971 | 130.521679 | 0.083829 |
Final | 1556 | 1.162501e-05 | 1.633580e+02 |
BACKGROUND RESULTS
Additional figures that enable further interrogation of wildlife movement in the landscape.
Loss of Speed

Fig. 3: The reduction in the speed of movement of the species from source to target with each stage of dropping is illustrated by the colour ramp, (note log scale).
The source and target are labelled using MAGENTA █ and CYAN █ respectively. This is a spatial representation of the values in column 5 of Table 1, Reduction per cell. Higher values mean that the loss of these cells was highly detrimental to the total speed achievable in the landscape, and it implies these cells are of higher priority for connectivity.
Start Flow Map

Fig. 4: The pattern of flow of individuals from source to target across the landscape before dropping is performed, i.e. with all habitat cells within the Prioritisation Layer contributing to connectivity. Flow through each cell is represented by the colour ramp, (note log scale). The source and target are labelled using MAGENTA █ and CYAN █ respectively. Areas without habitat are grey, i.e. contain no data.
End Flow Map

Fig. 5: The pattern of flow of individuals from source to target across the landscape after dropping has been performed, i.e. with no habitat cells within the Prioritisation layer contributing to connectivity. Flow through each cell is represented by the colour ramp, (note log scale). The source and target are labelled using MAGENTA █ and CYAN █ respectively. Cells that have been dropped are grey, as are areas that never contained habitat.
Progress of movement

Fig. 6: The progress of movement from source to target is illustrated by the colour ramp. Bands of similar colour lie at a similar effective distance between the source and the target, e.g. a value of 50%, as demonstrated in the legend, represents the cells the species is expected to reach within half of the total 'travel' time. The source and target are labelled using MAGENTA █ and CYAN █ respectively.

Fig. 7: Shows the links with the highest power. Power can be thought of as the "strain" placed on that link relative to the rest of the circuit. This plot shows the top links as requested. Consult SabahPA1Prioritise_bottlenecks.csv or view the shapefile SabahPA1Prioritise_bottlenecks.shp for actual power values. The habitat layer is shown in green for reference.
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How to cite Condatis
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Most recent publication of the underlying scientific method: Hodgson, J. A., Wallis,
D. W., Krishna, R., & Cornell, S. J. (2016). How to manipulate landscapes to improve the potential for range expansion.
Methods in Ecology and Evolution, 7(12), 1558-1566. Doi:10.1111/2041-210X.12614.
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