Frithjof Emil Moy

Successful large-scale and long-term kelp forest restoration by culling sea urchins with quicklime and supported by crab predation

Hartvig Christie, Frithjof Emil Moy, Camilla With Fagerli, Eli Rinde et autres

Abstract In 2013, a large scale (70 hectare) kelp forest restoration experiment was conducted in a sea urchin barren that had been stable for 45 years. We used 200 tons of quicklime to eradicate the sea urchin population. Kelp recovered within a …

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Successful large-scale and long-term kelp forest restoration by culling sea urchins with quicklime; and supported by crab predation

Hartvig Christie, Frithjof Emil Moy, Camilla With Fagerli, Eli Rinde et autres

no (code pays fourni par la source)

Macrophytes as habitat for fish

Hartvig Christie, Guri Sogn Andersen, Lise Ann Tveiten, Frithjof Emil Moy

Abstract As different macrophyte habitats house different distributions of invertebrates, we questioned if differences in the composition of fish in these habitats also could be identified. Additionally, we addressed the question if the fish communities could be affected a few years after …

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Ecosystem-level effects of large-scale disturbance in kelp forests

Kjell Magnus Norderhaug, Karen Filbee‐Dexter, Carla Freitas, SR Birkely et autres

Understanding the effects of ecological disturbances in coastal habitats is crucial and timely as these are anticipated to increase in intensity and frequency in the future due to increasing human pressure. In this study we used directed kelp trawling as a scientific …

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Predation mortality from ambush and cruising predators on newly-settled 0-group gadoids

Torstein Pedersen, Hans Kristian Strand, Hartvig Christie, Frithjof Emil Moy

We investigated predation from an ambush predator (shorthorn sculpin) and two cruising predators (Atlantic cod and saithe) on bottom-settled 0-group cod and saithe juveniles in a fjord in northern Norway. Stomach contents of potential fish predators caught by gill net in shallow …

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Synergism between cruising cod and ambush sculpin predators on 0-group gadoids is modified by daylight cycle and presence of aggressive wolffish

Hans Kristian Strand, Torstein Pedersen, Hartvig Christie, Frithjof Emil Moy

Shorthorn sculpin (Myoxocephalus scorpius) and large cod (300–400 g body weight) are important predators on newly settled 0-group cod (Gadus morhua) and saithe (Pollachius virens) in Porsangerfjorden in northern Norway. The Atlantic wolffish (Anarhichas lupus) used to be abundant but is now …

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Green gravel: a novel restoration tool to combat kelp forest decline

Stein Fredriksen, Karen Filbee‐Dexter, Kjell Magnus Norderhaug, Henning Steen et autres

Kelp forests are in decline globally and large-scale intervention could be required to halt the loss of these valuable ecosystems. To date kelp forest restoration has had limited success and been expensive and unable to address the increasing scale of ecosystem deterioration. …

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Achieving Reliable Estimates of the Spatial Distribution of Kelp Biomass

Thijs Christiaan van Son, Nikolaos Nikolioudakis, Henning Steen, Jon Albretsen et autres

Kelp forests are highly productive systems that are important ecologically and commercially as well as in a blue carbon perspective. Given their importance, there is an urgent need to achieve reliable estimates of the spatial distribution of their biomass. Species distribution modelling …

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Optimizing the use of quicklime (CaO) for sea urchin management — A lab and field study

Hans Kristian Strand, Hartvig Christie, Camilla With Fagerli, Martin Mengede et autres

Mass blooms of sea urchins sometimes cause kelp forest collapses that can last for decades. Quicklime has historically been used to reverse those conditions, but the efficacy of liming has varied along latitudinal and temperature gradients for reasons that are not fully …

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Nasjonal kartlegging – kyst 2019. Ny revisjon av kriterier for verdisetting av marine naturtyper og nøkkelområder for arter

Trine Bekkby, Eli Rinde, Sigurd Heiberg Espeland, Heidi Anita Olsen et autres

Klima- og miljøverndepartementet, Nærings- og fiskeridepartementet og Forsvarsdepartementet finansierte i perioden 2007-2010 Nasjonalt program for kartlegging og overvåking av biologisk mangfold - marint. Kartleggingen og verdisettingen var basert på DNs håndbok 19-2001, revidert 2007. Basert på erfaringene og ny kunnskap fremmet faggruppen …

Tareundersøkelser i Nordland i 2019

Henning Steen, Kjell Magnus Norderhaug, Frithjof Emil Moy

Havforskningsinstituttet har i perioden 2013-2019 gjennomført undersøkelser i forbindelse med prøvehøsting av stortare (Laminaria hyperborea) på kyststrekningen Sømna (65° 20’ N) – Vega (65° 33’ N) i Nordland. Det ble i 2019 gjennomført oppfølgende undersøkelser av taresamfunnene på felt som ble prøvehøstet …

Recent trend reversal for declining European seagrass meadows

Carmen B. de los Santos, Dorte Krause‐Jensen, Teresa Alcoverro, Núria Marbà et autres

Seagrass meadows, key ecosystems supporting fisheries, carbon sequestration and coastal protection, are globally threatened. In Europe, loss and recovery of seagrasses are reported, but the changes in extent and density at the continental scale remain unclear. Here we collate assessments of changes …

pt, dk, es, sa, nl, pl, fr, it, gb, ie, no (code pays fourni par la source)