Sources, Sinks, and Population Regulation.¶
Pulliam, H. R. (1988). Sources, Sinks, and Population Regulation. The American Naturalist, 132(5), 652-661.
Cited by¶
4 citations across 4 artifacts.
Each citation links to the sentence it supports in the citing article.
Primes¶
Mechanisms¶
- Ecological Intervention Level Choice
- Its strength is refusing to mistake the visible site for the whole problem when source-sink dynamics are in play — where a sink population persists only because a source elsewhere keeps replenishing it, so treating the sink alone is endless.
This sourceShows that local sink populations can persist because reproductive surplus from source habitats replenishes them, so local conditions alone do not explain the observed population.
- Its strength is refusing to mistake the visible site for the whole problem when source-sink dynamics are in play — where a sink population persists only because a source elsewhere keeps replenishing it, so treating the sink alone is endless.
- Metapopulation Model
- - Parameterize each patch by its unaided rate. Every patch carries a local net rate of production versus loss, estimated without imports, so sources (surplus) and sinks (deficit) separate on their own demographics rather than on how full they currently are.
This sourceDefines sources and sinks from local demographic production versus mortality, with sinks remaining locally deficient even when immigration maintains them.
- - Parameterize each patch by its unaided rate. Every patch carries a local net rate of production versus loss, estimated without imports, so sources (surplus) and sinks (deficit) separate on their own demographics rather than on how full they currently are.
- Source–Sink Network Mapping
- Its failure mode is that a network map is only as good as its flux data, and the seductive shortcut is to read abundance as source status — to circle the densest node because it is easiest to see and to reach.
This sourceShows that source status depends on demographic production and movement, so local abundance alone does not identify a source.
- Its failure mode is that a network map is only as good as its flux data, and the seductive shortcut is to read abundance as source status — to circle the densest node because it is easiest to see and to reach.
Verification¶
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