What is a metapopulation? And why should I care?. Hugh Possingham and friends. How to manage a metapopulation Problem 1. Michael Westphal ( UC Berkeley), Drew Tyre (U Nebraska), Scott Field (UQ) Can we make metapopulation theory useful?.
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What is a metapopulation?And why should I care?
Hugh Possingham and friends
How to manage a metapopulationProblem 1
Michael Westphal (UC Berkeley),
Drew Tyre (U Nebraska), Scott Field (UQ)
Can we make metapopulation theory useful?
The Mount Lofty Ranges, South Australia
The Cleland Gully
Figure shows options
Where should we revegetate now, and in the future? Does it depend on the state of the metapopulation?
State at time, t, (0,1,0,0,1,0)
State at time, t+1, (0,1,1,0,1,0)
Control options (one per 5 years, about 1ha reveg)
E5: largest patch bigger, can do 6 times
E2: most connected patch bigger, 6 times
C5: connect largest patch
C2: connect patches1,2,3
E7: make new patch
DN: do nothing
Optimal translocation strategiesProblem 2
Brigitte Tenhumberg, Drew Tyre (U Nebraska), Katriona Shea (Penn State)
Consider the Arabian Oryx Oryx leucoryx – if we know how many are in the wild, and in a zoo, and we know birth and death rates in the zoo and the wild, how many should we translocate to or from the wild to maximise persistence of the wild population
Growth rate R = 0.85
Capacity = 50
Growth rate R = 1.3
Capacity = 20
Result – base parameters
R = release, mainly when population in zoo is near capacity
C = capture, mainly when zoo population small, capture entire wild population when this would roughly fill the zoo
If zoo growth rate changes, results change – but for a “new” species we won’t know R in the zoo
Enter – active adaptive management,
Management with a plan for learning
Metapopulaton dynamics in a dynamic landscape
Pure Ecological Theory