Condatis analysis results report.
Job: SabahPA1Prioritise
Analysis Type: Dropping

Namekaallen
Emailkaallen@liverpool.ac.uk
Date presented02/26/2020 19:06:15
Time taken for analysis0:03:42


Input Data and parameters
Habitat layerForestundrop.tif
Source and Target layerSourceTarget1.tif
Prioritisation LayerForestdrop.tif
Reproductive Rate (individuals per km2)2000.0
Dispersal Distance (km)4.0


Processes
Condatis Version1.10
Dropping Steps10
Step typeCell_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


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.

KEY RESULTS

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
Speed vs Dropping Stage
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
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

StageDroppedSpeedSpeed ReductionReduction per Cell
Initial0444.7792680.0000000.000000
11557444.2837170.4955510.000318
21557439.9164324.3672850.002805
31557433.7017486.2146840.003991
41557421.30106912.4006790.007964
51557406.64287314.6581970.009414
61557381.89177424.7510980.015897
71557344.49088437.4008910.024021
81557293.87965050.6112340.032506
91557163.357971130.5216790.083829
Final15561.162501e-051.633580e+02
Table 1: Summary of results from Condatis dropping analysis, showing the effect of dropping cells at each stage.


BACKGROUND RESULTS
Additional figures that enable further interrogation of wildlife movement in the landscape.

Loss of Speed
Speed vs Dropping Stage
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
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
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
Speed vs Dropping Stage
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.





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How to cite Condatis
For preferred citation formats, please refer to our website
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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