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R0 Analysis of a Benthic-Drift Model for a Stream Population
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- Author(s) / Creator(s)
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One key issue for theory in stream ecology is how much stream flow can be changed while still
maintaining an intact stream ecology, instream flow needs (IFNs); the study of determining IFNs is
challenging due to the complex and dynamic nature of the interaction between the stream environment
and the biological community. We develop a process-oriented benthic-drift model that links
changes in the flow regime and habitat availability with population dynamics. In the model, the
stream is divided into two zones, drift zone and benthic zone, and the population is divided into
two interacting compartments, individuals residing in the benthic zone and individuals dispersing
in the drift zone. We study the population persistence criteria, based on the net reproductive rate
R0 and on related measures. We develop new theory to calculate these quantities and use them to
investigate how the various flow regimes, population birth rate, individual transfer rates between
zones, and river heterogeneity affect population persistence. The theory developed here provides
the basis for effective decision-making tools for water managers. -
- Date created
- 2016-01-01
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- Subjects / Keywords
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- Type of Item
- Article (Published)