Abstract
We use a stochastic patch occupancy model of invertebrates in the Mound Springs ecosystem of South Australia to assess the ability of incidence function models to detect environmental impacts on metapopulations. We assume that the probability of colonisation decreases with increasing isolation and the probability of extinction is constant across spring vents. We run the models to quasi-equilibrium, and then impose an impact by increasing the local extinction probability. We sample the output at various times pre- and postimpact, and examine the probability of detecting a significant change in population parameters. The incidence function model approach turns out to have little power to detect environmental impacts on metapopulations with small numbers of patches.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 225-229 |
| Number of pages | 5 |
| Journal | Environment International |
| Volume | 27 |
| Issue number | 2-3 |
| DOIs | |
| State | Published - Jan 1 2001 |
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Keywords
- Environmental impact
- Great Artesian Basin
- Incidence function model
- Maximum likehood
- Metapopulation
- Quasi-equilibrium
ASJC Scopus subject areas
- Environmental Science(all)
Cite this
Detecting environmental impacts on metapopulations of mound spring invertebrates : Assessing an incidence function model. / Tyre, Richard AJ; Possingham, Hugh P.; Niejalke, Darren P.
In: Environment International, Vol. 27, No. 2-3, 01.01.2001, p. 225-229.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Detecting environmental impacts on metapopulations of mound spring invertebrates
T2 - Assessing an incidence function model
AU - Tyre, Richard AJ
AU - Possingham, Hugh P.
AU - Niejalke, Darren P.
PY - 2001/1/1
Y1 - 2001/1/1
N2 - We use a stochastic patch occupancy model of invertebrates in the Mound Springs ecosystem of South Australia to assess the ability of incidence function models to detect environmental impacts on metapopulations. We assume that the probability of colonisation decreases with increasing isolation and the probability of extinction is constant across spring vents. We run the models to quasi-equilibrium, and then impose an impact by increasing the local extinction probability. We sample the output at various times pre- and postimpact, and examine the probability of detecting a significant change in population parameters. The incidence function model approach turns out to have little power to detect environmental impacts on metapopulations with small numbers of patches.
AB - We use a stochastic patch occupancy model of invertebrates in the Mound Springs ecosystem of South Australia to assess the ability of incidence function models to detect environmental impacts on metapopulations. We assume that the probability of colonisation decreases with increasing isolation and the probability of extinction is constant across spring vents. We run the models to quasi-equilibrium, and then impose an impact by increasing the local extinction probability. We sample the output at various times pre- and postimpact, and examine the probability of detecting a significant change in population parameters. The incidence function model approach turns out to have little power to detect environmental impacts on metapopulations with small numbers of patches.
KW - Environmental impact
KW - Great Artesian Basin
KW - Incidence function model
KW - Maximum likehood
KW - Metapopulation
KW - Quasi-equilibrium
UR - http://www.scopus.com/inward/record.url?scp=0034766253&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034766253&partnerID=8YFLogxK
U2 - 10.1016/S0160-4120(01)00091-5
DO - 10.1016/S0160-4120(01)00091-5
M3 - Article
VL - 27
SP - 225
EP - 229
JO - Environmental International
JF - Environmental International
SN - 0160-4120
IS - 2-3
ER -