4 Works

Data from: Long-term mark-recapture and growth data for large-sized migratory brown trout (Salmo trutta) from Lake Mjøsa, Norway

Chloé Rebecca Nater, S. Jannicke Moe, Atle Rustadbakken, L. Asbjørn Vøllestad, Espen Lund, Tore Qvenild, Ola Hegge & Per Aass
This data package contains two unique publicly available time series of individual-based data originating from a 51-year mark-recapture study of a land-locked population of large-sized migratory brown trout (Salmo trutta) in Norway: the Hunder trout. In the period 1966-2015, nearly 14,000 adult Hunder trout have been captured and individually marked during their spawning migration from Lake Mjøsa to the river Gubrandsdalslågen. Almost a third of those individuals were later recaptured alive during a later spawning...

Data from: Congruence, but no cascade - pelagic biodiversity across 3 trophic levels in Nordic lakes

Tom Andersen, Dag O. Hessen, Johnny Håll, Maryia Khomich, Marcia Kyle, Markus Lindholm, Serana Rasconi, Birger Skjelbred, Jan-Erik Thrane & Bjørn Walseng
Covariation in species richness and community structure across taxonomical groups (cross-taxon congruence) has practical consequences for the identification of biodiversity surrogates and proxies, as well as theoretical ramifications for understanding the mechanisms maintaining and sustaining biodiversity. We found there to exist a high cross-taxon congruence between phytoplankton, zooplankton and fish in 73 large Scandinavian lakes across a 750 km longitudinal transect. The fraction of the total diversity variation explained by local environment alone was small...

Data from: Ecological impact assessments of alien species in Norway

Hanno Sandvik, Olga Hilmo, Snorre Henriksen, Reidar Elven, Per Arvid Åsen, Hanne Hegre, Oddvar Pedersen, Per Anker Pedersen, Heidi Solstad, Vigdis Vandvik, Kristine B. Westergaard, Frode Ødegaard, Sandra Åström, Hallvard Elven, Anders Endrestøl, Øivind Gammelmo, Bjørn Arild Hatteland, Halvor Solheim, Björn Nordén, Leif Sundheim, Venche Talgø, Tone Falkenhaug, Bjørn Gulliksen, Anders Jelmert, Eivind Oug … & Lisbeth Gederaas
Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some alien species become ecologically harmful by threatening native biota. This can lead to irreversible changes in local biodiversity and ecosystem functioning, and, ultimately, to biotic homogenisation. We risk-assessed all alien plants, animals, fungi and algae, within certain delimitations, that are known to reproduce in Norway. Mainland Norway and the Arctic archipelago of Svalbard plus Jan Mayen were treated as separate...

UV radiation affects anti-predatory defense traits in Daphnia pulex

Franceen Eshun-Wilson, Raoul Wolf, Tom Andersen, Dag Hessen & Erik Sperfeld
In aquatic environments prey perceive predator threats by chemical cues called kairomones, which can induce changes in their morphology, life histories and behavior. Predator-induced defenses have allowed for prey, such as Daphnia pulex, to avert capture by common invertebrate predators, such as Chaoborus sp. larvae. However, the influence of additional stressors, such as ultraviolet radiation (UVR), on the Daphnia-Chaoborus interaction is not settled as UVR may for instance deactivate the kairomone. In laboratory experiments, we...

Registration Year

  • 2020
    4

Resource Types

  • Dataset
    4

Affiliations

  • University of Oslo
    4
  • Norwegian Institute for Water Research
    4
  • Norwegian University of Life Sciences
    2
  • Norwegian Institute for Nature Research
    2
  • University of Greifswald
    1
  • The Arctic University of Norway
    1
  • Norconsult (Norway)
    1
  • Wasser Cluster Lunz
    1
  • Nofima
    1
  • Norwegian Polar Institute
    1