Invasive species often transform environmental conditions, exclude native species and alter ecosystem functioning, including key ecosystem processes underpinning nutrient and energy cycles. However, such impacts have been most documented during periods of invasive species dominance; their influences on functioning at lower relative abundances and after long-term establishment are less well-known.<p> <p>We ...

Rapid warming in the Arctic is drastically impacting marine ecosystems, affecting species communities and food-web structure. Pelagic Themisto amphipods are a major component of the Arctic zooplankton community and represent a key link between secondary producers and marine vertebrates at higher trophic levels. Two co-existing species dominate in the region: the larger Themisto libellula, considered ...

The increased export of terrestrial dissolved organic matter (terrDOM) to coastal marine ecosystems may affect local filter feeders and the local food web via the altered uptake of organic material and associated contaminants. To compare terrDOM to marine DOM (marDOM) as contaminant vectors to coastal biota, we exposed blue mussels (Mytilus sp.) to the different DOM types in combination with ...

In order to optimize the size selectivity of demersal trawl targeting Banded Scad, Alepes djedaba, in the South China Sea (SCS), we tested and compared the selective properties of four experimental codends. These codends included two diamond-mesh codends (T0 codends) with different mesh openings (30 and 35 mm), and two T90 codends (the netting was turned by 90 degrees) with the relatively same ...

Environmental pollution emerged as a major concern in the mid-20th century primarily due to the unrestricted release of industrial chemicals and pesticides. Among wildlife species, apex predators, like raptors, have been heavily exposed to environmental pollutants such as organo-halogenated contaminants (OHCs) and metals (e.g., mercury). Due to their high trophic position, harmful levels of these ...

Since 2017, NTNU’s Applied Underwater Robotics Laboratory has been developing an infrastructure for remote marine/subsea operations in Trondheim Fjord. The infrastructure, named the OceanLab subsea node, allows remote experimentation for three groups of assets: seabed infrastructure, surface or subsea vehicles/robots, and assets at remote experimentation sites. To achieve this task, a shoreside ...

Denne rapporten er et resultat av prosjektet Coreplan, som har undersøkt om metoder og tilnærminger som finnes i litteraturen om økosystemtjenester kan bidra til å styrke kystsoneforvaltningen. I rapporten diskuterer vi utviklingstrekk i norsk kystsoneplanlegging og hvordan utviklingen i bruken av kysten kan stille nye krav til kystsoneplanleggingen. Vi forklarer bakgrunnen for begrepet økosystemtjenester, ...

Virussykdommer hos atlantisk laks (Salmo salar) er en av de største utfordringene i norsk akvakulturindustri, og i tillegg til store økonomiske tap for næringa, fører virussykdommene også med seg store fiskevelferdsmessige problemer. Virusvaksinene som er tilgjengelig på det norske markedet i dag har vist å gi begrenset grad av beskyttelse, og velferdsmessige bekymringer er knyttet opp mot bivirkningene ...

Lingonberry is an evergreen dwarf shrub abundant and is a food traditionally regarded as a staple of Nordic diets. There is limited commercial harvest of these readily available berries. The objective of this doctoral thesis is to investigate how the composition Norwegian lingonberries vary and investigate how the composition of the lingonberries is affected by abiotic and biotic growth conditions. ...

Formålet til oppgaven er å bidra til økt forståelse for miljømerking og sertifisering som styringsform til ressursforvaltning, til tross for at det finnes reguleringer i fiske fra myndighetenes side. Den har også til hensikt å gi økt innsikt på betydningen dette har for norsk fiskerinæring. På bakgrunn av dette ble problemstillingen «Hva slags styringsformer er miljømerker og sertifisering, og hvilken ...