A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Species interactions, environmental gradients and body size shape population niche width (2022)
Eloranta, A. P., Finstad, A. G., Sandlund, O. T., Knudsen, R., Kuparinen, A., & Amundsen, P. (2022). Species interactions, environmental gradients and body size shape population niche width. Journal of Animal Ecology, 91(1), 154-169. https://doi.org/10.1111/1365-2656.13611
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Eloranta, Antti P.; Finstad, Anders G.; Sandlund, Odd Terje; Knudsen, Rune; Kuparinen, Anna; Amundsen, Per‐Arne
Lehti tai sarja: Journal of Animal Ecology
ISSN: 0021-8790
eISSN: 1365-2656
Julkaisuvuosi: 2022
Ilmestymispäivä: 17.10.2021
Volyymi: 91
Lehden numero: 1
Artikkelin sivunumerot: 154-169
Kustantaja: Wiley-Blackwell
Julkaisumaa: Britannia
Julkaisun kieli: englanti
DOI: https://doi.org/10.1111/1365-2656.13611
Linkki tutkimusaineistoon: https://datadryad.org/stash/dataset/doi:10.5061/dryad.gf1vhhmqz
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/78593
Tiivistelmä
Here we study the effects of inter- and intraspecific interactions, lake area and altitude, and fish body size on the trophic niche width and resource use of a generalist predator, the littoral-dwelling large, sparsely-rakered morph of European whitefish (Coregonus lavaretus; hereafter LSR whitefish). We use stable isotope, diet and survey fishing data from 14 subarctic lakes along an environmental gradient in northern Norway.
The isotopic niche width of LSR whitefish showed a humped-shaped relationship with increasing relative abundance of sympatric competitors, suggesting widest population niche at intermediate intensity of interspecific interactions. The isotopic niche width of LSR whitefish tended to decrease with increasing altitude, suggesting reduced niche in colder, less productive lakes.
LSR whitefish typically shifted to a higher trophic position and increased reliance on littoral food resources with increasing body size, although between-lake differences in ontogenetic niche shifts were evident. In most lakes, LSR whitefish relied less on littoral food resources than coexisting fishes and the niche overlap between sympatric competitors was most evident among relatively large individuals (>250 mm). Individual niche variation was highest among >200 mm long LSR whitefish, which likely have escaped the predation window of sympatric predators.
We demonstrate that intermediate intensity of interspecific interactions may broaden species’ niche width, whereas strong competition for limited resources and high predation risk may suppress niche width in less productive environments. Acknowledging potential humped-shaped relationships between population niche width and interspecific interactions can help us understand species’ responses to environmental disturbance (e.g., climate change and species invasions) as well as the driving forces of niche specialization.
YSO-asiasanat: vesiekosysteemit; ravintoverkot; lajit; vuorovaikutus; populaatiot; ekologinen lokero; ravinto; elinkierto; koko; siika
Vapaat asiasanat: ontogenia
Liittyvät organisaatiot
Hankkeet, joissa julkaisu on tehty
- Miten ihmislähtöiset ympäristönmuutokset vaikuttavat kylmien järvien ravintoverkkoihin ja lohikaloihin?
- Eloranta, Antti
- Suomen Akatemia
- Ihmisen ja ympäristön vaikutuksia akvaattisten ekosysteemien kompleksiin eko-evolutiiviseen dynamiikkaan
- Kuparinen, Anna
- Suomen Akatemia
Liittyvät tutkimusaineistot
OKM-raportointi: Kyllä
Raportointivuosi: 2022
Alustava JUFO-taso: 2