Population niche breadth and individual trophic specialisation of fish along a climate-productivity gradient

Visa fullständig post




Sanchez-Hernandez , J , Hayden , B , Harrod , C & Kahilainen , K K 2021 , ' Population niche breadth and individual trophic specialisation of fish along a climate-productivity gradient ' , Reviews in Fish Biology and Fisheries , vol. 31 , pp. 1025–1043 . https://doi.org/10.1007/s11160-021-09687-3

Titel: Population niche breadth and individual trophic specialisation of fish along a climate-productivity gradient
Författare: Sanchez-Hernandez, Javier; Hayden, Brian; Harrod, Chris; Kahilainen, Kimmo K.
Upphovmannens organisation: Biological stations
Lammi Biological Station
Datum: 2021-10-13
Språk: eng
Sidantal: 19
Tillhör serie: Reviews in Fish Biology and Fisheries
ISSN: 0960-3166
DOI: https://doi.org/10.1007/s11160-021-09687-3
Permanenta länken (URI): http://hdl.handle.net/10138/335773
Abstrakt: A mechanistic understanding of how environmental change affects trophic ecology of fish at the individual and population level remains elusive. To address this, we conducted a space-for-time approach incorporating environmental gradients (temperature, precipitation and nutrients), lake morphometry (visibility, depth and area), fish communities (richness, competition and predation), prey availability (richness and density) and feeding (population niche breadth and individual trophic specialisation) for 15 native fish taxa belonging to different thermal guilds from 35 subarctic lakes along a marked climate-productivity gradient corresponding to future climate change predictions. We revealed significant and contrasting responses from two generalist species that are abundant and widely distributed in the region. The cold-water adapted European whitefish (Coregonus lavaretus) reduced individual specialisation in warmer and more productive lakes. Conversely, the cool-water adapted Eurasian perch (Perca fluviatilis) showed increased levels of individual specialism along climate-productivity gradient. Although whitefish and perch differed in the way they consumed prey along the climate-productivity gradient, they both switched from consumption of zooplankton in cooler, less productive lakes, to macrozoobenthos in warmer, more productive lakes. Species with specialist benthic or pelagic feeding did not show significant changes in trophic ecology along the gradient. We conclude that generalist consumers, such as warmer adapted perch, have clear advantages over colder and clear-water specialised species or morphs through their capacity to undergo reciprocal benthic-pelagic switches in feeding associated with environmental change. The capacity to show trophic flexibility in warmer and more productive lakes is likely a key trait for species dominance in future communities of high latitudes under climate change.
Subject: Environmental change
Multichannel feeding
Stomach content analysis
Thermal guild
Subarctic lakes
1181 Ecology, evolutionary biology
Referentgranskad: Ja
Licens: cc_by
Användningsbegränsning: openAccess
Parallelpublicerad version: publishedVersion

Filer under denna titel

Totalt antal nerladdningar: Laddar...

Filer Storlek Format Granska
population.pdf 1.607Mb PDF Granska/Öppna

Detta dokument registreras i samling:

Visa fullständig post