Predators reduce extinction risk in noisy metapopulations
Background: Spatial structure across fragmented landscapes can enhance regional population persistence by promoting local "rescue effects". In small, vulnerable populations, where chance or random events between individuals may have disproportionately large effects on species interactions,...
| Glavni autori: | , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
Public Library of Science
2010
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| Teme: |
| _version_ | 1826296890276184064 |
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| author | Bull, J Bonsall, M |
| author_facet | Bull, J Bonsall, M |
| author_sort | Bull, J |
| collection | OXFORD |
| description | Background: Spatial structure across fragmented landscapes can enhance regional population persistence by promoting local "rescue effects". In small, vulnerable populations, where chance or random events between individuals may have disproportionately large effects on species interactions, such local processes are particularly important. However, existing theory often only describes the dynamics of metapopulations at regional scales, neglecting the role of multispecies population dynamics within habitat patches. Findings: By coupling analysis across spatial scales we quantified the interaction between local scale population regulation, regional dispersal and noise processes in the dynamics of experimental host-parasitoid metapopulations. We find that increasing community complexity increases negative correlation between local population dynamics. A potential mechanism underpinning this finding was explored using a simple population dynamic model. Conclusions: Our results suggest a paradox: parasitism, whilst clearly damaging to hosts at the individual level, reduces extinction risk at the population level. |
| first_indexed | 2024-03-07T04:23:17Z |
| format | Journal article |
| id | oxford-uuid:cbc0b380-451b-47b9-9fb8-90d197edc36e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:23:17Z |
| publishDate | 2010 |
| publisher | Public Library of Science |
| record_format | dspace |
| spelling | oxford-uuid:cbc0b380-451b-47b9-9fb8-90d197edc36e2022-03-27T07:17:04ZPredators reduce extinction risk in noisy metapopulationsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:cbc0b380-451b-47b9-9fb8-90d197edc36eEcology (zoology)Zoological sciencesEnglishOxford University Research Archive - ValetPublic Library of Science2010Bull, JBonsall, MBackground: Spatial structure across fragmented landscapes can enhance regional population persistence by promoting local "rescue effects". In small, vulnerable populations, where chance or random events between individuals may have disproportionately large effects on species interactions, such local processes are particularly important. However, existing theory often only describes the dynamics of metapopulations at regional scales, neglecting the role of multispecies population dynamics within habitat patches. Findings: By coupling analysis across spatial scales we quantified the interaction between local scale population regulation, regional dispersal and noise processes in the dynamics of experimental host-parasitoid metapopulations. We find that increasing community complexity increases negative correlation between local population dynamics. A potential mechanism underpinning this finding was explored using a simple population dynamic model. Conclusions: Our results suggest a paradox: parasitism, whilst clearly damaging to hosts at the individual level, reduces extinction risk at the population level. |
| spellingShingle | Ecology (zoology) Zoological sciences Bull, J Bonsall, M Predators reduce extinction risk in noisy metapopulations |
| title | Predators reduce extinction risk in noisy metapopulations |
| title_full | Predators reduce extinction risk in noisy metapopulations |
| title_fullStr | Predators reduce extinction risk in noisy metapopulations |
| title_full_unstemmed | Predators reduce extinction risk in noisy metapopulations |
| title_short | Predators reduce extinction risk in noisy metapopulations |
| title_sort | predators reduce extinction risk in noisy metapopulations |
| topic | Ecology (zoology) Zoological sciences |
| work_keys_str_mv | AT bullj predatorsreduceextinctionriskinnoisymetapopulations AT bonsallm predatorsreduceextinctionriskinnoisymetapopulations |