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dc.contributor.author
Albariño, Ricardo Javier  
dc.contributor.author
Closs, Gerard P.  
dc.contributor.author
Matthaei, Christoph  
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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  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
BROWN TROUT  
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FISH PREDATION  
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PERIPHYTON ATTRIBUTES  
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PREDATOR-AVOIDANCE BEHAVIOR  
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PREDATOR–GRAZER INTERACTIONS  
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SUBSTRATE SIZE  
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TROPHIC CASCADES  
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TROPHIC INTERACTIONS  
dc.subject.classification
Ecología  
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Ciencias Biológicas  
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CIENCIAS NATURALES Y EXACTAS  
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  
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  
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