Lake morphometry and resource polymorphism determine niche segregation between cool- and cold-water-adapted fish

Lake morphometry and resource polymorphism determine niche segregation between cool- and cold-water-adapted fish

Climate change is increasing ambient temperatures in Arctic and subarctic regions, facilitating latitudinal range expansions of freshwater fishes adapted to warmer water temperatures. The relative roles of resource availability and interspecific interactions between resident and invading species in...

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Veröffentlicht in:Ecology. - Duke University Press. - 95(2014), 2, Seite 538-552
1. Verfasser: Hayden, Brian (VerfasserIn)
Weitere Verfasser: Harrod, Chris, Kahilainen, Kimmo K.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Ecology
Schlagworte:Biological sciences Physical sciences Environmental studies
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520 |a Climate change is increasing ambient temperatures in Arctic and subarctic regions, facilitating latitudinal range expansions of freshwater fishes adapted to warmer water temperatures. The relative roles of resource availability and interspecific interactions between resident and invading species in determining the outcomes of such expansions has not been adequately evaluated. Ecological interactions between a cool-water adapted fish, the perch (Perca fluviatilis), and the cold-water adapted European whitefish (Coregonus lavaretus), were studied in both shallow and deep lakes with fish communities dominated by (1) monomorphic whitefish, (2) monomorphic whitefish and perch, and (3) polymorphic whitefish and perch. A combination of stomach content, stable-isotope, and invertebrate prey availability data were used to identify resource use and niche overlap among perch, the trophic generalist large sparsely rakered (LSR) whitefish morph, and the pelagic specialist densely rakered (DR) whitefish morph in 10 subarctic lakes at the contemporary distribution limit of perch in northern Scandinavia. Perch utilized its putative preferred littoral niche in all lakes. LSR whitefish utilized both littoral and pelagic resources in monomorphic whitefish-dominated lakes. When found in sympatry with perch, LSR whitefish exclusively utilized pelagic prey in deep lakes, but displayed niche overlap with perch in shallow littoral lakes. DR whitefish was a specialist zooplanktivore, relegating LSR whitefish from pelagic habitats, leading to an increase in niche overlap between LSR whitefish and perch in deep lakes. Our results highlight how resource availability (lake depth and fish community) governs ecological interactions between native and invading species, leading to different outcomes even at the same latitudes. These findings suggest that lake morphometry and fish community structure data should be included in bioclimate envelope-based models of species distribution shifts following predicted climate change. 
540 |a Copyright © 2014 Ecological Society of America 
650 4 |a Biological sciences  |x Biology  |x Zoology  |x Animals  |x Fish  |x Whitefish 
650 4 |a Biological sciences  |x Biology  |x Zoology  |x Animals  |x Fish  |x Freshwater fishes 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Bodies of water  |x Lakes 
650 4 |a Biological sciences  |x Ecology  |x Aquatic ecology  |x Freshwater ecology 
650 4 |a Biological sciences  |x Biology  |x Biological taxonomies  |x Species 
650 4 |a Biological sciences  |x Ecology  |x Ecological processes  |x Ecological competition  |x Interspecific competition  |x Ecological invasion 
650 4 |a Biological sciences  |x Biology  |x Marine biology  |x Aquatic organisms  |x Plankton  |x Zooplankton 
650 4 |a Environmental studies  |x Environmental sciences  |x Natural resources 
650 4 |a Biological sciences  |x Ecology  |x Ecological processes  |x Ecosystem dynamics  |x Trophic dynamics  |x Trophic relationships 
650 4 |a Biological sciences  |x Ecology  |x Population ecology 
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700 1 |a Harrod, Chris  |e verfasserin  |4 aut 
700 1 |a Kahilainen, Kimmo K.  |e verfasserin  |4 aut 
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