Quaternary landscape evolution on species dispersal across Southeast Asia

This repository contains input files and pre-/post- processing notebooks and scripts to evaluate how physiographic changes have modified the regional connectivity network and remodelled the pathways of species dispersal across Southeast Asia.

The approach is based on a combination of landscape evolution and connectivity models.

Docker image

A docker container geodels/gospl:bio containing all the libraries required to run the models and the notebooks from this repository is available and can be downloaded following the approach presented here.

Drainage basin reorganisation and river capture

Notebooks

• 1-runLEM.ipynb: run the landscape evolution model badlands (forcing conditions for the landscape elevation model are provided in the lem-models folder),
• 2-getShelfInfo.ipynb: extract information related to Sunda Shelf evolution and catchment characteristics,
• 3-plotShelfInfo.ipynb: plot catchment area evolution, stream parameters and Sunda Shelf information.

Landscape connectivity for the exposed Sunda Shelf

Notebooks

• 4-cptLEC.ipynb: from landscape evolution simulation, compute the landscape elevation connectivity,
• 5-buildCostMap.ipynb: to quantify the impact of geomorphology on the evolution of terrestrial biota, we build cost surface maps used in circuitscape,
• 6-getConnectivity.ipynb: compute from circuit theory model z-score and Getis-Ord index to evaluate statistically significant connectivity hotspots between different time steps and simulations.
• 7-plotStats.ipynb: example of plots of statistical distribution of landscape elevational connectivity and current flow at specific time step.