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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Hugh Possingham and friends
Michael Westphal (UC Berkeley),
Drew Tyre (U Nebraska), Scott Field (UQ)
Can we make metapopulation theory useful?
Hugh’s birthplace metapopulation
The Mount Lofty Ranges, South Australia
The Cleland Gully metapopulation
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) metapopulation
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
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
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
Enter – active adaptive management,
Management with a plan for learning
Applied “new” species we won’t know R in the zoo
EcologyEradicate, Exploit, Conserve
Pure Ecological Theory