Negative resistance and resilience: Biotic mechanisms underpin delayed biological recovery in stream restoration

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dc.contributor.authorBarrett , Isabelle C.
dc.contributor.authorMcIntosh, Angus
dc.contributor.authorFebria , Catherine M.
dc.contributor.authorWarburton, Helen
dc.date.accessioned2024-12-02T20:13:33Z
dc.date.available2024-12-02T20:13:33Z
dc.date.issued2021
dc.description.abstractTraditionally, resistance and resilience are associated with good ecological health, often underpinning restoration goals. However, degraded ecosystems can also be highly resistant and resilient, making restoration difficult: degraded communities often become dominated by hyper-tolerant species, preventing recolonization and resulting in low biodiversity and poor ecosystem function. Using streams as a model, we undertook a mesocosm experiment to test if degraded community presence hindered biological recovery. We established 12 mesocosms, simulating physically healthy streams. Degraded invertebrate communities were established in half, mimicking the post-restoration scenario of physical recovery without biological recovery. We then introduced a healthy colonist community to all mesocosms, testing if degraded community presence influenced healthy community establishment. Colonists established less readily in degraded community mesocosms, with larger decreases in abundance of sensitive taxa, likely driven by biotic interactions rather than abiotic constraints. Resource depletion by the degraded community likely increased competition, driving priority effects. Colonists left by drifting, but also by accelerating development, reducing time to emergence but sacrificing larger body size. Since degraded community presence prevented colonist establishment, our experiment suggests successful restoration must address both abiotic and biotic factors, especially those that reinforce the 'negative' resistance and resilience which perpetuate degraded communities and are typically overlooked.
dc.identifier.citationBarrett IC, McIntosh AR, Febria CM, Warburton HJ (2021). Negative resistance and resilience: Biotic mechanisms underpin delayed biological recovery in stream restoration. Proceedings of the Royal Society B: Biological Sciences. 288(1947). 20210354-.
dc.identifier.doihttp://doi.org/10.1098/rspb.2021.0354
dc.identifier.issn0962-8452
dc.identifier.issn1471-2954
dc.identifier.urihttps://hdl.handle.net/10092/107188
dc.languageeng
dc.publisherThe Royal Society
dc.rightsAll rights reserved unless otherwise stated
dc.rights.urihttp://hdl.handle.net/10092/17651
dc.subjectbiotic interactions
dc.subjectcolonization
dc.subjectpriority effects
dc.subjectresistance and resilience
dc.subject.anzsrc31 - Biological sciences::3103 - Ecology::310304 - Freshwater ecology
dc.subject.anzsrc41 - Environmental sciences::4102 - Ecological applications::410203 - Ecosystem function
dc.titleNegative resistance and resilience: Biotic mechanisms underpin delayed biological recovery in stream restoration
dc.typeJournal Article
uc.collegeFaculty of Science
uc.departmentSchool of Biological Sciences
uc.departmentSchool of Earth and Environment
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