Community structure affects trophic ontogeny in a predatory fish
Sánchez-Hernández, J., Eloranta, A., Finstad, A. G., & Amundsen, P.-A. (2017). Community structure affects trophic ontogeny in a predatory fish. Ecology and Evolution, 7(1), 358-367. https://doi.org/10.1002/ece3.2600
Julkaistu sarjassa
Ecology and EvolutionPäivämäärä
2017Tekijänoikeudet
© 2016 The Authors. Published by John Wiley & Sons Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License.
While most studies have focused on the timing and nature of ontogenetic niche shifts, information is scarce about the effects of community structure on trophic ontogeny of top predators. We investigated how community structure affects ontogenetic niche shifts (i.e., relationships between body length, trophic position, and individual dietary specialization) of a predatory fish, brown trout (Salmo trutta). We used stable isotope and stomach content analyses to test how functional characteristics of lake fish community compositions (competition and prey availability) modulate niche shifts in terms of (i) piscivorous behavior, (ii) trophic position, and (iii) individual dietary specialization. Northern Scandinavian freshwater fish communities were used as a study system, including nine subarctic lakes with contrasting fish community configurations: (i) trout-only systems, (ii) two-species systems (brown trout and Arctic charr [Salvelinus alpinus] coexisting), and (iii) three-species systems (brown trout, Arctic charr, and three-spined sticklebacks [Gasterosteus aculeatus] coexisting). We expected that the presence of profitable small prey (stickleback) and mixed competitor–prey fish species (charr) supports early piscivory and high individual dietary specialization among trout in multispecies communities, whereas minor ontogenetic shifts were expected in trout-only systems. From logistic regression models, the presence of a suitable prey fish species (stickleback) emerged as the principal variable determining the size at ontogenetic niche shifts. Generalized additive mixed models indicated that fish community structure shaped ontogenetic niche shifts in trout, with the strongest positive relationships between body length, trophic position, and individual dietary specialization being observed in three-species communities. Our findings revealed that the presence of a small-sized prey fish species (stickleback) rather than a mixed competitor–prey fish species (charr) was an important factor affecting the ontogenetic niche-shift processes of trout. The study demonstrates that community structure may modulate the ontogenetic diet trajectories of and individual niche specialization within a top predator.
...
Julkaisija
John Wiley & Sons Ltd.ISSN Hae Julkaisufoorumista
2045-7758Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/26408286
Metadata
Näytä kaikki kuvailutiedotKokoelmat
Lisenssi
Ellei muuten mainita, aineiston lisenssi on © 2016 The Authors. Published by John Wiley & Sons Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License.
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
Artificial selection for predatory behaviour results in dietary niche differentiation in an omnivorous mammal
Hämäläinen, Anni; Kiljunen, Mikko; Koskela, Esa; Koteja, Pawel; Mappes, Tapio; Rajala, Milla; Tiainen, Katariina (The Royal Society, 2022)The diet of an individual is a result of the availability of dietary items and the individual's foraging skills and preferences. Behavioural differences may thus influence diet variation, but the evolvability of diet choice ... -
Spatial Memory Drives Foraging Strategies of Wolves, but in Highly Individual Ways
Gurarie, Eliezer; Bracis, Chloe; Brilliantova, Angelina; Kojola, Ilpo; Suutarinen, Johanna; Ovaskainen, Otso; Potluri, Sriya; Fagan, William F. (Frontiers Media SA, 2022)The ability of wild animals to navigate and survive in complex and dynamic environments depends on their ability to store relevant information and place it in a spatial context. Despite the centrality of spatial memory, ... -
High-resolution 3D forest structure explains ecomorphological trait variation in assemblages of saproxylic beetles
Drag, Lukas; Burner, Ryan C.; Stephan, Jörg G.; Birkemoe, Tone; Doerfler, Inken; Gossner, Martin M.; Magdon, Paul; Ovaskainen, Otso; Potterf, Mária; Schall, Peter; Snäll, Tord; Sverdrup‐Thygeson, Anne; Weisser, Wolfgang; Müller, Jörg (Wiley-Blackwell, 2023)Climate, topography and the 3D structure of forests are major drivers affecting local species communities. However, little is known about how the specific functional traits of saproxylic (wood-living) beetles, involved in ... -
Interannual variation in littoral benthic macroinvertebrate communities under contrasting crayfish predation in a large boreal lake
Nzobeuh, Polain (2014)Long term studies are widely used nowadays in many fields of ecology. For instance, records over years represent a valuable tool to monitor and comprehend environmental changes. In freshwater ecology, long term studies ... -
Does Intraspecific Variation in rDNA Copy Number Affect Analysis of Microbial Communities?
Lavrinienko, Anton; Jernfors, Toni; Koskimäki, Janne J.; Pirttilä, Anna Maria; Watts, Phillip C. (Elsevier, 2021)Amplicon sequencing of partial regions of the ribosomal RNA loci (rDNA) is widely used to profile microbial communities. However, the rDNA is dynamic and can exhibit substantial interspecific and intraspecific variation ...
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.