0000000000241790

AUTHOR

Odd Terje Sandlund

showing 2 related works from this author

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

2019

This is a post-peer-review, pre-copyedit version of an article published in Hydrobiologia. The final authenticated version is available online at https://doi.org/10.1007/s10750-019-3953-4. Niche diversification of polymorphic Arctic charr can be altered by multiple anthropogenic stressors. The opossum-shrimp (Mysis relicta) 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 (δ13C, δ15N) and trophically transmitted parasites, the zooplanktivorous upper water-column dwelling ‘normal’ morph was clearly trophically separated from two sympatric deep-water morphs…

0106 biological sciencesHydrobiologiaanimal structuresgenetic structuresMysis relictaistutus (eläimet)stable isotopes:Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 [VDP]Aquatic Science010603 evolutionary biology01 natural sciencesZooplanktonäyriäisetpolymorphismnieriäeriytyminenhydropower effectsloisetVDP::Mathematics and natural scienses: 400::Zoology and botany: 48014. Life underwaterspecies introductionsecological divergencereproductive and urinary physiologySalvelinus alpinusbiologyEcology010604 marine biology & hydrobiologyfungiNiche segregationPlanktonbiology.organism_classificationDeep waterekologinen lokeroMysidaArcticVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480parasite communitypsychological phenomena and processes
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Species interactions, environmental gradients and body size shape population niche width

2021

1. Competition for shared resources is commonly assumed to restrict population-level niche width of coexisting species. However, the identity and abundance of coexisting species, the prevailing environmental conditions, and the individual body size may shape the effects of interspecific interactions on species’ niche width. 2. Here we study the effects of interspecific 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 …

0106 biological sciencesvuorovaikutusniche expansionmedia_common.quotation_subjectsalmonidPopulationNicheBiology010603 evolutionary biology01 natural sciencesCompetition (biology)Intraspecific competitionravintoindividual specializationpopulaatiotkokoAnimalsBody Sizelajit14. Life underwatereducationontogeniahigh-latitude lakesRelative species abundanceEcology Evolution Behavior and Systematicsmedia_commonEnvironmental gradientTrophic levelresource competitioneducation.field_of_studyEcology010604 marine biology & hydrobiologyvesiekosysteemitInterspecific competitionekologinen lokerotrophic nicheLakesSympatryelinkiertoontogenysiikaPredatory Behaviordiet selectionAnimal Science and ZoologySalmonidaeravintoverkotJournal of Animal Ecology
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