Search results for "lake morphometry"

showing 2 items of 2 documents

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

2015

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 extent and determinants of such coupling remains a topical area of ecological research and is largely unknown in oligotrophic high-latitude lakes. We analyzed food-web structure and resource use by a generalist top predator, the Arctic charr Salvelinus alpinus (L.), in 17 oligotrophic subarctic lakes…

resource competitionlake morphometryNICHE SEGREGATIONfood-chain lengthCHARR SALVELINUS-ALPINUSSTABLE-ISOTOPEVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497SUB-ARCTIC LAKESSALMO-TRUTTA L.WHITEFISHsaalistustrophic nicheWEBSMAINTENANCEMORPHOMETRYenergy mobilization1181 Ecology evolutionary biologyhabitat couplingstable isotope analysisVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497predationBenthic1172 Environmental sciencesOriginal Research
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The variable position of Arctic charr (Salvelinus alpinus (L.)) in subarctic lake food webs

2013

resource competitionpelagiaaliekologiset lokerotympäristötekijätplanktonpohjaeliöstölake morphometryulappavyöhykkeetenergy flowravinnonkäyttönieriälitoraalitrophic nicheindividual specializationeriytyminenravinnonottostable isotope analysislittoral productionkilpailurantavyöhykkeetravintoverkot
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