Blar i forfatter "Eloranta, Antti"

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    • Community structure affects trophic ontogeny in a predatory fish 

      Sanchez-Hernandez, Javier; Eloranta, Antti; Finstad, Anders Gravbrøt; Amundsen, Per-Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-12-20)
      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 ...

    • Consistent isotopic differences between Schistocephalus spp. parasites and their stickleback hosts 

      Eloranta, Antti; Knudsen, Rune; Amundsen, Per-Arne; Merilä, Juha (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-23)
      Parasite−host systems show markedly variable patterns in isotopic fractionation: parasites can be either depleted or enriched in 15N and 13C as compared to their hosts. However, it remains unknown whether isotopic fractionation patterns are similar in comparable parasite−host systems from markedly different ecosystems. Results of this study show that large-sized Schistocephalus spp. endoparasites ...

    • Effects of water level regulation in alpine hydropower reservoirs: an ecosystem perspective with a special emphasis on fish 

      Hirsch, Philipp E.; Eloranta, Antti; Amundsen, Per-Arne; Brabrand, Åge; Charmasson, Julie; Helland, Ingeborg Palm; Power, Michael John; Sanchez-Hernandez, Javier; Sandlund, Odd Terje; Sauterleute, Julian Friedrich; Skoglund, Sigrid Østrem; Ugedal, Ola; Yang, Hong (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-04)
      Sustainable development of hydropower demands a holistic view of potential impacts of water level regulation (WLR) on reservoir ecosystems. Most environmental studies of hydropower have focused on rivers, whereas environmental effects of hydropower operations on reservoirs are less well understood. Here, we synthesize knowledge on how WLR from hydropower affects alpine lake ecosystems and highlight ...

    • From clear lakes to murky waters – tracing the functional response of high-latitude lake communities to concurrent ‘greening’ and ‘browning’ 

      Hayden, B.; Harrod, C.; Thomas, S.M.; Eloranta, Antti; Myllykangas, J.‐P.; Siwertsson, Anna; Præbel, Kim; Knudsen, Rune; Amundsen, Per-Arne; Kahilainen, Kimmo Kalevi (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-21)
      Climate change and the intensification of land use practices are causing widespread eutrophication of subarctic lakes. The implications of this rapid change for lake ecosystem function remain poorly understood. To assess how freshwater communities respond to such profound changes in their habitat and resource availability, we conducted a space‐for‐time analysis of food‐web structure in 30 lakes ...

    • Introduction of Mysis relicta (Mysida) reduces niche segregation between deep-water Arctic charr morphs 

      Knudsen, Rune; Eloranta, Antti; Siwertsson, Anna; Paterson, Rachel A.; Power, Michael; Sandlund, Odd Terje (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-26)
      Niche diversification of polymorphic Arctic charr can be altered by multiple anthropogenic stressors. The opossum-shrimp (<i>Mysis relicta</i>) was introduced to compensate for reduced food resources for fish following hydropower operations in Lake Limingen, central Norway. Based on habitat use, stomach contents, stable isotopes (δ<sup>13</sup>C, δ<sup>15</sup>N) and trophically transmitted parasites, ...

    • Lake size and fish diversity determine resource use and trophic position of a top predator in high-latitude lakes 

      Eloranta, Antti; Kahilainen, Kimmo K.; Amundsen, Per-Arne; Knudsen, Rune; Harrod, Chris; Jones, Roger I. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03-23)
      Prey preference of top predators and energy flow across habitat boundaries are of fundamental importance for structure and function of aquatic and terrestrial ecosystems, as they may have strong effects on production, species diversity, and food-web stability. In lakes, littoral and pelagic food-web compartments are typically coupled and controlled by generalist fish top predators. However, the ...