A5082830905- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Coastal wetland ecosystem dynamics
- Marine and fisheries research
- Coastal and Marine Management
- Peatlands and Wetlands Ecology
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Ecology and biodiversity studies
- Bryophyte Studies and Records
- Isotope Analysis in Ecology
- Botany and Plant Ecology Studies
- Food Industry and Aquatic Biology
- Cephalopods and Marine Biology
- Fish Ecology and Management Studies
- Ocean Acidification Effects and Responses
- European and International Law Studies
- Environmental DNA in Biodiversity Studies
- Aquatic Invertebrate Ecology and Behavior
- Geology and Paleoclimatology Research
- Marine animal studies overview
- Historical and Archaeological Studies
- Agriculture Sustainability and Environmental Impact
- Echinoderm biology and ecology
- Social and Educational Sciences
Norwegian Institute for Water Research
2014-2024
Akvaplan-niva
2020
National Oceanography Centre
2017
University of Southampton
2017
Norwegian Institute for Nature Research
1995-2004
University of Oslo
1980-2004
University of Groningen
2004
Max Planck Institute for Evolutionary Biology
2004
University of Algarve
2004
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 396:221-233 (2009) - DOI: https://doi.org/10.3354/meps08351 Macrophytes as habitat for fauna Hartvig Christie1,*, Kjell Magnus Norderhaug1, Stein Fredriksen2 1Norwegian Institute Water Research, Gaustadalleen 21, 0349 Oslo, Norway 2Department of Biology, University PO Box 1069 Blindern, 0316 *Email:...
Abstract As the most widespread seagrass in temperate waters of Northern Hemisphere, Zostera marina provides a unique opportunity to investigate extent which historical legacy last glacial maximum (LGM18 000–10 000 years bp ) is detectable modern population genetic structure. We used sequences from nuclear rDNA–internal transcribed spacer (ITS) and chloroplast mat K‐intron, nine microsatellite loci survey 49 populations (> 2000 individuals) throughout species’ range. Minimal sequence...
Fauna associated with the common kelp along Norwegian coast, Laminaria hyperborea , was sampled at four sites covering 1000 km of coastline. Exploitation habitat by fauna, and ways in which size seasonal variations affect fauna community were analysed. The study focused on mobile macrofauna, 238 species found 56 kelps sampled, an average density almost 8000 individuals per kelp. Amphipods gastropods most diverse abundant groups. composition different lamina, stipe (with epiphytic algae)...
Abstract Sugar kelp forests (Saccharina latissima) normally dominate the sublittoral rocky sea bed in medium exposed to sheltered areas of Norwegian coast. In 2002, a large-scale disappearance sugar was observed, and survey more than 600 sites along coast southern Norway (58–63°N, 6–11°E) during 2004–2009 recorded shift from anticipated communities dominated by filamentous, ephemeral macroalgae. The loss most severe Skagerrak region, comparison with earlier studies supported observed changes...
Abstract Small-scale grazing events where sea urchins have grazed kelp forests to barren grounds been reported all along the NE Atlantic coast. One large-scale event has Norwegian and Russian coast were by during early 1970s. The ground area persisted since. Different theories explain presented. This paper seeks sort summarize earlier published papers national reports critically examine most important presented event. conclusion is that reason for unknown it too late find causes 40 years...
predator–prey interactions between fish and macrofauna in kelp ( laminaria hyperboea ) forest were examined. caught gill-nets traps at two sites throughout the diurnal cycle. their stomach contents analysed. most abundant species, except pollachius virens , larger numbers night than during daytime. examined fed cycle kelp-associated fauna found to be important prey. was same contained mainly pelagic prey, day night. small labrids specialists, feeding on numerically dominant gastropods rissoa...
We analyzed 136 time series (covering from 44 to 73 yr) of juvenile cod estimate the level direct and delayed density-dependent mortality (DDM) 11 populations Norwegian Skagerrak coast. The parameters were estimated using a modeling approach that explicitly incorporates observation errors, so we could quantify density-independent (stochastic) variation in survival cod. Moderate strong levels DDM (direct or delayed) eight populations. Variability 0-group (corrected for errors) appeared be...
Analysis of long-term hydrographic data for the North Atlantic Ocean shows evidence cycles with periods 3 to 4 , 6 7, 10 11, 18 20 and 100 yr.There are known physical explanations such cycles.Plankton indicate that at least 4, 7 11 yr occur.Benthic suggest present, exists a secular cycle.Not all species show or can be expected cyclic behaviour.Constancy numbers through decades occurs depths over m in some even shallow depths.Whilst, using spectral analysis, found benthic data, longer than...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 451:45-60 (2012) - DOI: https://doi.org/10.3354/meps09594 Effects of wave exposure on population structure, demography, biomass and productivity kelp Laminaria hyperborea Morten F. Pedersen1,*, Lars B. Nejrup1, Stein Fredriksen2, Hartvig Christie3, Kjell Magnus Norderhaug3 1Centre for Integrated Population...
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,...
Abstract To investigate the importance of benthic vegetation for shallow infaunal assemblages, macroinvertebrates were sampled inZostera marina meadows and in adjacent bare sand at three sites Skagerrak region one Western part Norway. A total 3777 individuals encountered, representing mainly faunal groups Annelida, Nemertea, Echinodermata, Crustacea Mollusca. Twice as many found theZ. compared to sand. Oligochaetes most abundant group (29% number individuals), followed by crustaceans (24%),...
On the Skagerrak coast kelp Saccharina latissima has suffered severe stand reductions over last decade, resulting in loss of important habitats. In present study, healthy plants were transplanted into four deforested areas and their patterns growth, reproduction, survival monitored through subsequent seasons. Our main objective was to establish whether able grow mature areas. We observed normal growth maturation at all study sites. However, heavy fouling by epiphytes occurred each summer,...
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...
Abstract Species interactions are integral drivers of community structure and can change from competitive to facilitative with increasing environmental stress. In subtidal marine ecosystems, however, along physical stress gradients have seldom been tested. We observed seaweed canopy across depth latitudinal test whether light temperature structured interaction patterns. also quantified interspecific intraspecific among nine species three continents examine the general nature in systems under...
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...
The macrophytes Fucus serratus and Zostera marina form similar substrates for associated flora fauna in shallow waters Norway. While F. forms a more or less continuous belt on rocky substrate along the coast, Z. disjunct populations sandy muddy bottoms. This study focused organisms with these two localities Skagerrak region. In total, 130 taxa of epiphytic were identified: 22 green algae, 41 red 32 brown eight diatoms 27 sessile animals. One hundred twenty-seven mobile macrofauna registered....