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dc.contributor.authorOksanen, Lauri
dc.contributor.authorVuorinen, Katariina Elsa M
dc.contributor.authorOksanen, Tarja Maarit
dc.date.accessioned2023-08-11T09:52:48Z
dc.date.available2023-08-11T09:52:48Z
dc.date.issued2023-04-19
dc.description.abstractThe searching efficiency of predators depends on the balance between the adaptations of the predator and the counter-adaptations of the prey. In this evolutionary race, the prey should normally have the upper hand, as it can perform tradeoffs between efficiency in resource use and ability to avoid predators. In terrestrial predator–herbivore systems, however, the huge difference in food quality between prey and predators seems to give predators an advantage. In productive terrestrial ecosystems, predators thus chronically overexploit herbivores, i.e. regulate them at densities far below the point of maximum sustainable yield. Assuming type II functional response, this should result in violent limit cycle dynamics. In reality, however, such cycles are only common at high latitudes, whereas the herbivory-based food webs of species-rich ecosystems at middle and low latitudes are characterized by asymptotic dynamics, where numerical changes only occur in response to external forcing. One way or another, diversity thus seems to beget stability in terrestrial grazing webs. We propose that strong, donorcontrolled energy flows from the detritus web and directly from plants to predators are the key for the prevalence of asymptotic dynamics at middle and low latitudes. These flows support generalists with type III functional response and, therefore, a capacity to curb budding outbreaks at an early stage. The ongoing extinction wave could critically weaken these stabilizing interactions, which could destabilize currently stable food webs. and result in violent limit cycle dynamics in ecosystems, where the dominating species have evolved under asymptotic dynamics. This could cause secondary extinctions and inflict large economic losses.en_US
dc.identifier.citationOksanen LK, Vuorinen Elsa Maria, Oksanen TM. The paradox of searching efficiency or why are violent population cycles so uncommon in terrestrial ecosystem. Oikos. 2023en_US
dc.identifier.cristinIDFRIDAID 2144075
dc.identifier.doi10.1111/oik.09443
dc.identifier.issn0030-1299
dc.identifier.issn1600-0706
dc.identifier.urihttps://hdl.handle.net/10037/29873
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalOikos
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.subjectVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.subjectVDP::Mathematics and natural scienses: 400::Zoology and botany: 480en_US
dc.titleThe paradox of searching efficiency or why are violent population cycles so uncommon in terrestrial ecosystemen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)