t1
Conclusion
A key aspect often neglected by movement ecologists is the sequential use of different habitats. We present a
tree-based method with origins in
molecular biology named Sequence
Analysis Methods (SAM) to Explore, Simulate, Classify and Visualize
sequential habitat use patterns.
Sequential Habitat Use
“Sequence of characters giving the habitat use of an animal for
temporally ordered relocations extracted from spatial habitat layers, representing the animal’s
surrounding landscape.”
Background
Sequential Habitat Use by Animals:
A Methodological Workflow
Workflow
Johannes De Groeve
Van de Weghe, N, Cagnacci, F.
1 2
EXPLORE biweekly sequences of habitat use by generating exploratory trees for each animal.
Those trees are used to build hypotheses of expected patterns (Pe) of sequential habitat use.
SIMULATE Pe using stochastic movement rules to produce simulated trajectories within each animal's MCP, and generate individual level simulation trees (step 3).
Applicable to multiple species
S
A
M
W
o
r
k
f
l
o
w
1 3 2 4 4CLASSIFY: Re-run SAM for real & simulated trajectories combined and generate classification trees.
3
VISUALIZE: Prune classification trees to visualize the classification of real sequences into Pe.
E x pl ore V is ua liz e S im ul ate S im ul ate/ C las s ify
SAM allows to
Simulate Visualize Explore Classifysequential patterns of use.
Animal’s MCP
t1 t2 t3 t4 t5 t6 Open Forest
