• Bispevika. Vurdering av vannutskiftning og miljøforhold i vannbasseng B6b 

      Walday, Mats Gunnar; Molvær, Jarle; Rinde, Eli; Sørensen, Elin Tanding; Christie, Hartvig C; Leikvin, Øyvind (NIVA-rapport;7563, Research report, 2020)
      Oslo S Utvikling (OSU) arbeider med detaljplan for utbygging i Bispevika, med utfylling og bebyggelse i nordøstre del. Her inngår bl.a. to bassenger med innløp fra Bispevika. Det er viktig at bassengene har tilstrekkelig ...
    • Can multitrophic interactions and ocean warming influence large-scale kelp recovery? 

      Christie, Hartvig C; Gundersen, Hege; Rinde, Eli; Filbee-Dexter, Karen; Norderhaug, Kjell Magnus; Pedersen, Torstein; Bekkby, Trine; Gitmark, Janne Kim; Fagerli, Camilla With (Journal article; Peer reviewed, 2019)
      Ongoing changes along the northeastern Atlantic coastline provide an opportunity to explore the influence of climate change and multitrophic interactions on the recovery of kelp. Here, vast areas of sea urchin‐dominated ...
    • Can sea urchin grazing of kelp forests in the arctic make rocky shore systems more vulnerable to oil spills? 

      Christie, Hartvig C; Bekkby, Trine; Norderhaug, Kjell Magnus; Beyer, Jonny; Jørgensen, Nina Mari (Journal article; Peer reviewed, 2019)
      In Arctic Norway, the risk of major marine oil spills associated with increasing offshore drilling, land terminal, and maritime transport activities is a cause for concern. Intertidal and subtidal kelp and seaweed communities ...
    • Ecosystem accounting’s potential to support coastal and marine governance 

      Chen, Wenting; Van Assche, Kristof Albert M; Hynes, Stephen; Bekkby, Trine; Christie, Hartvig C; Gundersen, Hege (Peer reviewed; Journal article, 2020)
      The paper presents an exploratory assessment of ecosystem accounting's potential to support marine and coastal governance. Norwegian kelp forest management and restoration, and a series of nested case studies are used as ...
    • Effects of depth and overgrowth of ephemeral macroalgae on a remote subtidal NE Atlantic eelgrass (Zostera marina) community 

      Baden, Susanne; Fredriksen, Stein; Christie, Hartvig C; Eriander, Louise; Gustafsson, Camilla; Holmer, Marianne; Olesen, Birgit; Thormar, Jonas; Boström, Christoffer (Peer reviewed; Journal article, 2022)
      We conducted a short-term field sampling complemented with time integrating stable isotope analysis to holistically investigate status and ecological interactions in a remote NE Atlantic Zostera marina meadow. We found ...
    • Efficient coralline algal psbA mini barcoding and High Resolution Melt (HRM) analysis using a simple custom DNA preparation 

      Anglès d'Auriac, Marc; Le Gall, Line; Peña, Viviana; Hall-Spencer, Jason M.; Steneck, Robert S.; Fredriksen, Stein; Gitmark, Janne Kim; Christie, Hartvig C; Husa, Vivian; Grefsrud, Ellen Sofie; Rinde, Eli (Journal article; Peer reviewed, 2019)
      Coralline algae form extensive maerl and rhodolith habitats that support a rich biodiversity. Calcium carbonate harvesting as well as trawling activities threatens this ecosystem. Eleven species were recorded so far as ...
    • Environmental impacts of the diver operated C disc to harvest sea urchins and for kelp restoration 

      Michelsen, Helena Kling; Fagerli, Camilla With; Christie, Hartvig C (NIVA-rapport;7737-2022, Research report, 2022)
      NIVA did a 2-day environmental evaluation of the diver operated suction device “C disc” constructed by C robotics. Because the C disc uses suction from a water pump to suck sea urchins from the seafloor, it will collect ...
    • Financial and Institutional Support Are Important for Large-Scale Kelp Forest Restoration 

      Eger, Aron M; Vergés, Adriana; Choi, Chang Geun; Christie, Hartvig C; Coleman, Melinda Ann; Fagerli, Camilla With; Fujita, Daisuke; Hasegawa, Masatoshi; Kim, Jeong Ha; Mayer-Pinto, Mariana; Reed, Dan C; Steinberg, Peter D.; Marzinelli, Ezequiel Miguel (Peer reviewed; Journal article, 2020)
      Kelps form extensive underwater forests that underpin valuable ecosystem goods and services in temperate and polar rocky coastlines globally. Stressors, such as ocean warming and pollution are causing regional declines of ...
    • Genetic heterogeneity of two bioeconomically important kelp species along the Norwegian coast 

      Evankow, Ann; Christie, Hartvig C; Hancke, Kasper; Brysting, Anne Krag; Junge, Claudia; Fredriksen, Stein; Thaulow, Jens (Journal article; Peer reviewed, 2019)
      Knowledge of genetic diversity among wild populations is becoming increasingly important as more species are recognized for their bioeconomic value. Industrialization of natural resources, such as kelp in the marine shallow ...
    • Global kelp forest restoration: past lessons, present status, and future directions 

      Eger, Aaron M.; Marzinelli, Ezequiel M.; Christie, Hartvig C; Fagerli, Camilla With; Fujita, Daisuke; Gonzalez, Alejandra P.; Hong, Seok Woo; Kim, Jeong Ha; Lee, Lynn C.; McHugh, Tristin Anoush; Nishihara, Gregory N.; Tatsumi, Masayuki; Steinberg, Peter D.; Verges, Adriana (Peer reviewed; Journal article, 2022)
      Kelp forest ecosystems and their associated ecosystem services are declining around the world. In response, marine managers are working to restore and counteract these declines. Kelp restoration first started in the 1700s ...
    • Hva bestemmer egenskaper og økologisk funksjon i ålegrasenger? 

      Christie, Hartvig C; Rinde, Eli; Moy, Frithjof Emil; Bekkby, Trine (NIVA-rapport;6747, Research report, 2014)
      Juni 2014 ble 27 ålegrasenger i Aust-Agder undersøkt for å analysere hvilke miljøfaktorer som bestemmer egenskaper som tetthet og høyde til ålegrasplanten i engene, og om enger med tett ålegrasvegetasjon er leveområde for ...
    • Importance of wave and current exposure to fauna communities in Laminaria hyperborea kelp forest 

      Norderhaug, Kjell Magnus; Christie, Hartvig C; Rinde, Eli; Gundersen, Hege; Bekkby, Trine (Journal article; Peer reviewed, 2014)
      Hydrodynamic forces from waves and currents may have strong but different impacts on benthic diversity. In order to study the relative importance of current and wave exposure to the diversity of macrofauna associated with ...
    • In a squeeze: Epibiosis may affect the distribution of kelp forests 

      Andersen, Guri Sogn; Christie, Hartvig C; Moy, Frithjof Emil (Journal article; Peer reviewed, 2019)
      The processes limiting the population recovery of the kelp Saccharina latissima after recent large‐scale loss from the south coast of Norway are poorly understood. Previous investigations do, however, suggest that the ...
    • Incorporating facilitative interactions into small-scale eelgrass restoration—challenges and opportunities 

      Gagnon, Karine; Christie, Hartvig C; Didderen, Karin; Fagerli, Camilla With; Govers, Laura L.; Gräfnings, Max L. E.; Heusinkveld, Jannes H. T.; Kaljurand, Kaire; Lengkeek, Wouter; Martin, Georg; Meysick, Lukas; Pajusalu, Liina; Rinde, Eli; van der Heide, Tjisse; Boström, Christoffer (Peer reviewed; Journal article, 2021)
      Marine ecosystem engineers such as seagrasses and bivalves create important coastal habitats sustaining high biodiversity and ecosystem services. Restoring these habitats is difficult due to the importance of feedback ...
    • Jomfruland nasjonalpark. Sammenstilling av eksisterende kunnskapom marine naturverdier 

      Christie, Hartvig C; Rinde, Eli; Gitmark, Janne K.; Walday, Mats (NIVA-rapport;6636, Research report, 2014)
      Til arbeidet med etablering av Jomfruland nasjonalpark har NIVA fått i oppdrag å sammenstille kunnskap om marine naturverdier, med særlig vekt på naturtyper med st or økologisk verdi. De viktigste naturtypene er ...
    • Kartlegging av et utvalg marine naturtyper i Oslofjorden 

      Rinde, Eli; Bekkby, Trine; Kvile, Kristina Øie; Andersen, Guri Sogn; Brkljacic, Marijana Stenrud; Anglès d'Auriac, Marc; Christie, Hartvig C; Fagerli, Camilla With; Fredriksen, Stein; Moy, Siri Røang; Staalstrøm, Andre; Tveiten, Lise Ann (NIVA-rapport;7605, Research report, 2021)
      Formålet med prosjektet har vært å skaffe kunnskap om et utvalg marine naturtyper i Oslofjorden, og samtidig skaffe praktisk erfaring med NiN-systemet som verktøy for å dekke miljøforvaltningens behov. Gjennom feltkartlegging ...
    • Konsekvensvurdering av miljøgiftutlekking fra vraket av MS "Raana" i Bremsnesfjorden ved Kristiansund N 

      Bakke, Torgeir Heggelund; Golmen, Lars Gunder; Christie, Hartvig C (NIVA-rapport;6915, Research report, 2015)
      NIVA har gjennomført en miljøkonsekvensvurdering av mulige utslipp og utlekking av miljøgifter fra vraket av MS Raana som sank i Bremsnesfjorden utenfor Kristiansund 12. januar 2007. Vurderingen utgjør ett av flere grunnlag ...
    • Lack of sea urchin settlement may explain kelp forest recovery in overgrazed areas in Norway 

      Fagerli, Camilla With; Norderhaug, Kjell Magnus; Christie, Hartvig C (Journal article; Peer reviewed, 2013)
      In this study, we investigated whether failure of sea urchin recruitment can explain an ongoing phase shift from overgrazed, barren grounds to kelp forests along the coast of mid- Norway. Settlement of sea urchins on ...
    • Lithothamnion (Hapalidiales, Rhodophyta) in the changing Arctic and Subarctic: DNA sequencing of type and recent specimens provides a systematics foundation 

      Peña, Viviana; Bélanger, David; Gagnon, Patrick; Richards, Joseph L.; Gall, Line Le; Hughey, Jeffery R.; Saunders, Gary W.; Lindstrom, Sandra C.; Rinde, Eli; Husa, Vivian; Christie, Hartvig C; Fredriksen, Stein; Hall-Spencer, Jason M.; Steneck, Robert S.; Schoenrock, Kathryn M.; Gitmark, Janne Kim; Grefsrud, Ellen Sofie; Anglès d'Auriac, Marc; Legrand, Erwann; Grall, Jacques; Mumford, Thomas F.; Kamenos, Nicholas A.; Gabrielson, Paul W. (Peer reviewed; Journal article, 2021)
      Coralline red algae in the non-geniculate genera Clathromorphum, Phymatolithon and Lithothamnion are important benthic ecosystem engineers in the photic zone of the Arctic and Subarctic. In these regions, the systematics ...
    • Local flexibility in feeding behaviour and contrasting microhabitat use of an omnivore across latitudes 

      Leclerc, Jean-Charles; de Bettignies, Thibaut; de Bettignies, Florian; Christie, Hartvig C; Franco, João N; Leroux, Cédric; Davoult, Dominique; Pedersen, Morten F; Filbee-Dexter, Karen; Wernberg, Thomas (Peer reviewed; Journal article, 2021)
      As the environment is getting warmer and species are redistributed, consumers can be forced to adjust their interactions with available prey, and this could have cascading effects within food webs. To better understand the ...