Data from: Ensemble approach for potential habitat mapping of invasive Prosopis in Turkana, Kenya
Aim: Prosopis spp. are an invasive alien plant species native to the Americas and well adapted to thrive in arid environments. In Kenya, several remote‐sensing studies conclude that the genus is well established throughout the country and is rapidly in‐ vading new areas. This research aims to model...
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Zusammenfassung: | Aim: Prosopis spp. are an invasive alien plant species native to the
Americas and well adapted to thrive in arid environments. In Kenya,
several remote‐sensing studies conclude that the genus is well established
throughout the country and is rapidly in‐ vading new areas. This research
aims to model the potential habitat of Prosopis spp. by using an ensemble
model consisting of four species distribution models. Furthermore,
environmental and expert knowledge‐based variables are assessed. Location:
Turkana County, Kenya. Methods: We collected and assessed a large number
of environmental and expert knowl‐ edge‐based variables through variable
correlation, collinearity, and bias tests. The varia‐ bles were used for
an ensemble model consisting of four species distribution models: (a)
logistic regression, (b) maximum entropy, (c) random forest, and (d)
Bayesian networks. The models were evaluated through a block
cross‐validation providing statistical measures. Results: The best
predictors for Prosopis spp. habitat are distance from water and built‐up
areas, soil type, elevation, lithology, and temperature seasonality. All
species distribution models achieved high accuracies while the ensemble
model achieved the highest scores. Highly and moderately suitable Prosopis
spp. habitat covers 6% and 9% of the study area, respectively. Main
conclusions: Both ensemble and individual models predict a high risk of
continued invasion, confirming local observations and conceptions.
Findings are valuable to stake‐ holders for managing invaded area,
protecting areas at risk, and to raise awareness. |
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DOI: | 10.5061/dryad.sk4410m |