A5000020278- Marine and coastal plant biology
- Coastal wetland ecosystem dynamics
- Marine Biology and Ecology Research
- Coastal and Marine Management
- Coral and Marine Ecosystems Studies
- Peatlands and Wetlands Ecology
- Echinoderm biology and ecology
- Food Industry and Aquatic Biology
- Geology and Paleoclimatology Research
- Marine Bivalve and Aquaculture Studies
- Identification and Quantification in Food
Norwegian Institute for Water Research
2013-2024
Akvaplan-niva
2020
University of Oslo
2013-2014
Abstract Ongoing changes along the northeastern Atlantic coastline provide an opportunity to explore influence of climate change and multitrophic interactions on recovery kelp. Here, vast areas sea urchin‐dominated barren grounds have shifted back kelp forests, in parallel with temperature predator abundances. We compiled data from studies covering more than 1,500‐km northern Norway. The dataset has been used identify regional patterns urchin recruitment, relate these abiotic biotic factors,...
The spatial distribution of kelp (Laminaria hyperborea) and sea urchins (Strongylocentrotus droebachiensis) in the NE Atlantic are highly related to physical factors temporal changes temperature. On a large scale, we identified borders for recovery urchin persistence along north-south gradient. Sea was also coast-ocean southern border corresponds summer temperatures exceeding about 10°C, threshold value known be critical recruitment development. outer gradient is temperature, wave exposure...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 502:207-218 (2014) - DOI: https://doi.org/10.3354/meps10701 Predators of destructive sea urchin Strongylocentrotus droebachiensis on Norwegian coast Camilla With Fagerli1,3,*, Kjell Magnus Norderhaug1,3, Hartvig Christie1, Morten Foldager Pedersen2, Stein Fredriksen3 1Norwegian Institute for Water Research...
Around year 2000, sugar kelp (Saccharina latissima) forests were observed to disappear in southern parts of Norway, being replaced by mats turf algae (i.e. filamentous ephemeral algae) loaded with sediments. About 80% the stations on Skagerrak coast and about 40% North Sea affected. Various types S. latissima a discontinuous pattern. This large spatial scale event was reported as possible irrevocable regime shift, not caused single factor but related multiple stressors where eutrophication...
Kelps form extensive underwater forests that underpin valuable ecosystem goods and services in temperate polar rocky coastlines globally. Stressors such as ocean warming pollution are causing regional declines of kelp their associated worldwide. Kelp forest restoration is becoming a prominent management intervention, but we have little understanding what drives success at appropriate spatial scales. Though most guidelines stress the importance planning, stressor mitigation ecological...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 488:119-132 (2013) - DOI: https://doi.org/10.3354/meps10413 Lack of sea urchin settlement may explain kelp forest recovery in overgrazed areas Norway Camilla With Fagerli1,2,*, Kjell Magnus Norderhaug1,2, Hartvig C. Christie1 1Norwegian Institute for Water Research (NIVA), 0349 Oslo, 2Department Biology,...
To understand the restoration potential of degraded habitats, it is important to know key processes and habitat features that allow for recovery after disturbance. As part EU (Horizon 2020) funded MERCES project, a group European experts compiled assessed current knowledge, from both past ongoing efforts, within Mediterranean Sea, Baltic North-East Atlantic Ocean. The aim was provide an expert judgement how different could impact success enhance marine habitats. A set biological ecological...
Abstract Seaweeds are foundation species on rocky shores that exposed to a series of stressors. These include wave exposure, desiccation, grazing, and human activities, with habitat fragmentation as common result. As part climate biodiversity changes, we expecting increased winds more frequent storm events, warmer climate, trophic downgrading ecosystems, causing overgrazing events. Here, present the results from two-factorial mesocosm experiment relationship between growth (branching tip...
Abstract A test deployment of a time-lapse camera lander in the deep Oslofjord (431 m) was used to obtain initial information on response benthic fauna macroalgal debris. Three species were baited plate: Fucus serratus, Saccharina latissima and Laminaria hyperborea observed during 41.5 hours. The deep-water shrimp Pandalus borealis attracted macroalgae rapidly (3 min after reached seafloor), followed by amphipods. Shrimp abundances significantly higher areas covered compared adjacent...
Marine ecosystem engineers such as seagrasses and bivalves create important coastal habitats sustaining high biodiversity services. Restoring these is difficult due to the importance of feedback mechanisms that can require large‐scale efforts ensure success. Incorporating facilitative interactions could increase feasibility success small‐scale restoration efforts, which would limit pressure on donor sites reduce costs time associated with restoration. Here, we tested two methods for...
We compared the genetic differentiation in green sea urchin Strongylocentrotus droebachiensis from discrete populations on NE Atlantic coast. By using eight recently developed microsatellite markers, structure was between Danish Strait south to Barents Sea north (56-79°N). Urchins are spread by pelagic larvae and may be transported long distances northwards-going ocean currents. Two main superimposed patterns were identified. The first showed a subtle but significant southernmost...
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 liming varied along latitudinal and temperature gradients reasons are not fully understood. To evaluate feasibility ecological impacts in a high latitude area Northern Norway (70°N), we conducted field pilot study 2008–2011, follow-up lab 2017, further 2018–2019, with latter evaluating implementing previous results site...
<title>Abstract</title> In 2013 we initiated a large-scale (70 hectare) kelp forest restoration experiment in sea urchin induced barren that had been stable for 45 years. We used 200 tons of quicklime culling. The immediate high mortality was followed by recovery species within year. Quickliming did not significantly affect the abundance nontarget on barrens. Whereas kelps and other macroalgae recovered year after treatment, mobile fauna community recover at same rate, probably due to slower...
Abstract In 2013, a large scale (70 hectare) kelp forest restoration experiment was conducted in sea urchin barren that had been stable for 45 years. We used 200 tons of quicklime to eradicate the population. Kelp recovered within year lime-treated sites. Quickliming did not significantly affect abundance non-target species. Mobile fauna colonized restored kelps, but at slower rate than and other macroalgae, probably due dispersal abilities. The monitoring period (2012–2021) encompassed...
Kelp forest ecosystems and their associated ecosystem services are declining around the world. In response, marine managers working to restore counteract these declines. restoration first started in 1700s Japan since then has spread across globe. Restoration efforts, however, have been largely disconnected, with varying methodologies trialled by different actors countries. To distil lessons learned over last 60 years of kelp restoration, we synthesize results nearly 200 projects spanning...
Kelps form extensive underwater forests that underpin valuable ecosystem goods and services in temperate polar rocky coastlines worldwide. Stressors such as ocean warming pollution are causing regional declines of kelp their associated Kelp forest restoration is becoming a prominent management intervention, but we have little understanding what drives success at appropriate spatial scales. This fundamental issue because the typical mismatch between scale degradation intervention these...
The green sea urchin Strongylocentrotus droebachiensis has a wide circumpolar distribution and plays key role in coastal ecosystems worldwide by destructively grazing macroalgae beds turn them into marine deserts, so-called barren grounds. In the past decades, large established kelp forests have been overgrazed transformed to such grounds on Norwegian coast. This important repercussions for diversity production, including reproduction of several fish species relying as nurseries. Genetic is...