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dc.contributor.author
Albariño, Ricardo Javier
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dc.contributor.author
Closs, Gerard P.
dc.contributor.author
Matthaei, Christoph
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dc.contributor.author
Townsend, Colin R.
dc.contributor.author
Zamorano, Daniel
dc.date.available
2023-08-01T19:05:34Z
dc.date.issued
2022-09
dc.identifier.citation
Albariño, Ricardo Javier; Closs, Gerard P.; Matthaei, Christoph; Townsend, Colin R.; Zamorano, Daniel; Substrate size modifies stream grazer–biofilm interactions in the presence of invertivorous fish; Ecological Society of America; Ecology; 103; 12; 9-2022; 1-15
dc.identifier.issn
0012-9658
dc.identifier.uri
http://hdl.handle.net/11336/206418
dc.description.abstract
When herbivore abundance is controlled by predators there may be an indirect positive effect on primary producers due to reduced grazing pressure, but the potential of predation refuges to modify such trophic cascades has rarely been studied. By experimentally manipulating substrate particle size and fish predation regime, we assessed the outcome of invertebrate grazer–biofilm interactions in streams. Locations at the center of larger substrate particles were predicted to pose a higher predation risk, and therefore be subjected to a lower grazing pressure. In our 52-day experiment in a New Zealand stream, small-sized substrates (terracotta tiles) remained virtually free of periphyton across their entire upper surface, whereas a thick periphyton mat was formed across large tiles with only edges remaining free. In channels containing fish (either native Galaxias vulgaris or exotic Salmo trutta), grazing on tiles was lower than in the absence of fish. A preference for grazing near to the edge of tiles was clearest in fish channels but was also evident even in the absence of fish, probably reflecting fish presence and/or fish kairomones in the stream from where the colonizing invertebrates had been derived. Total grazer density was similar across treatments with or without fish, suggesting that our results can be explained mostly by changes in the behavior of grazers. We suggest that refuge availability, interacting with grazer predator-avoidance behavior, may produce a context-dependent patchwork of trophic cascades in streams and other ecosystems.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Ecological Society of America
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BROWN TROUT
dc.subject
FISH PREDATION
dc.subject
PERIPHYTON ATTRIBUTES
dc.subject
PREDATOR-AVOIDANCE BEHAVIOR
dc.subject
PREDATOR–GRAZER INTERACTIONS
dc.subject
SUBSTRATE SIZE
dc.subject
TROPHIC CASCADES
dc.subject
TROPHIC INTERACTIONS
dc.subject.classification
Ecología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Substrate size modifies stream grazer–biofilm interactions in the presence of invertivorous fish
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-06-29T10:29:17Z
dc.identifier.eissn
1939-9170
dc.journal.volume
103
dc.journal.number
12
dc.journal.pagination
1-15
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Albariño, Ricardo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. University Of Otago; Nueva Zelanda
dc.description.fil
Fil: Closs, Gerard P.. University Of Otago; Nueva Zelanda
dc.description.fil
Fil: Matthaei, Christoph. University Of Otago; Nueva Zelanda
dc.description.fil
Fil: Townsend, Colin R.. University Of Otago; Nueva Zelanda
dc.description.fil
Fil: Zamorano, Daniel. University Of Otago; Nueva Zelanda
dc.journal.title
Ecology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecy.3828
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/ecy.3828
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