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  • 1.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Biologisk inventering av havsbottnar kring Örefjärden, Snöan och Bonden: Marinbiologisk inventering och naturvärdesbedömning av planerat marint naturreservat2009Rapport (Annet vitenskapelig)
  • 2.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Inventering och naturvärdesbedömning av fyra kustnära havsområden i Västerbotten: Tavasten, Ostnäs, Juviken/Lillhavet och Kinnbäcksfjärden2017Rapport (Annet vitenskapelig)
    Abstract [sv]

    En inventering och naturvärdesbedömning av fyra kustnära havsområden i Västerbottens län har genomförts. Inventeringen fokuserade på undervattensvegetation och består huvudsakligen av en visuell transektinventering genom video och dykning utförd av Umeå marina forskningscentrum 2007-2008. Kunskapsunderlaget har utökats genom att inkludera flera andra undersökningar. Totalt spänner underlaget över tidsperioden 1997-2012.

  • 3.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Miljöövervakning i Gaviksfjärden, Västernorrlands län: sammanställning och resultatanalys2014Rapport (Annet vitenskapelig)
  • 4.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Trophic interactions involving mysid shrimps (Mysidacea) in the near-bottom habitat in the Baltic Sea2004Inngår i: Aquatic Ecology, ISSN 1386-2588, E-ISSN 1573-5125, Vol. 38, nr 3, s. 457-469Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In a six month mesocosm tank experiment, hypotheses were tested concerning the role of benthopelagic mysid shrimps (Mysidacea) in the near-bottom food web of the Bothnian Sea, in the northern Baltic Sea. The first hypothesis tested was that the mysids interact, through predation, with benthic deposit-feeding Monoporeia affinis amphipods. A second hypothesis tested was that the sediment type is important for the overwintering success of the mysids. Changes in abundance and mass were recorded for M. affinis and mysids when separate and when coexisting, in two sediment types differing in organic content (food level); soft muddy clay (rich) and fine sand (poor). Despite the fact that newborn M. affinis offspring, a plausible target for predation by mysids, were present in substantial numbers in the tanks, no consistent evidence for any interaction between these taxa was found. The biomass of mysids was slightly higher in the muddy clay than in the sand tanks, and the mechanism behind this substrate effect is discussed. A third hypothesis, that the mysids interact with near-bottom zooplankton, was investigated. The tanks were continually supplied with in situ near-bottom sea-water containing a seminatural assemblage of near-bottom plankton. As a result of mysid predation, tanks with mysids had lower abundance and biomass of cyclopoid copepods than tanks without mysids. Thus, the major interaction found was predation on near-bottom zooplankton by mysids and it is suggested that this interaction could potentially be an important food link, especially during periods with low food availability in the pelagic system.

  • 5.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Undervattensvegetation i Holmöarnas naturreservat: Inventeringar och miljöövervakningar genomförda under åren 1997, 2004 och 20072008Rapport (Annet vitenskapelig)
  • 6.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Uppföljning av naturtypen 1140 blottade ler- och sandbottnar i Bottenviken och Södra Östersjön: En pilotstudie2016Rapport (Annet (populærvitenskap, debatt, mm))
    Fulltekst (pdf)
    fulltext
  • 7.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Övervakning av makrovegetation i Bottniska viken: En utvärdering av pågående undersökningar och underlag för vidareutveckling2014Rapport (Annet vitenskapelig)
  • 8.
    Albertsson, Jan
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Leonardsson, K
    Deposit-feeding amphipods (Monoporeia affinis) reduce the recruitment of copepod nauplii from benthic resting eggs in the northern Baltic Sea2001Inngår i: Marine Biology, ISSN 0025-3162, E-ISSN 1432-1793, Vol. 138, nr 4, s. 793-801Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We experimentally investigated the effect of different densities of the burrowing, deposit-feeding amphipod Monoporeia affinis on the recruitment of zooplankton from benthic resting eggs. Intact sediment cores with in situ density and species composition of zooplankton resting eggs and benthic fauna were collected in the northern Bothnian Sea, part of the Baltic Sea. We removed as many M, affinis as possible from the cores and then added different numbers of ill. affinis to the cores to generate a range of densities. The cores were exposed to different densities of M. affinis for either 3 or 40 days, after which the hatched zooplankton was registered. One subset of the cores were initially incubated under low temperature (2-3 degreesC, to prevent hatching) for 37 days (the resting phase), to allow for effects of M. affinis on unhatched resting eggs. These cores were then incubated under higher temperature (13 degreesC) for 3 days (the hatching phase), to induce hatching and allow for effects on hatching or hatched specimens. In a second subset of cores with the same time and temperature schedule, the M. affinis density was experimentally reduced at the start of the hatching phase, to evaluate the effect of M. affinis during the hatching phase. To a third subset of cores, we immediately initiated the hatching phase, without an experimental resting phase, to evaluate the effects induced during the resting phase. The most common zooplankton species that hatched was Eurytemora affinis (Copepoda), followed by Bosmina longispina maritima (Cladocera). In all cores that were subjected to a resting phase, the numbers of hatched E. affinis were log-linearly negatively related to density of M. affinis. An increase of M. affinis density from 1,000 to 5,000 individuals m(-2), normal field densities, reduced the hatching by 60-70%. The negative impact was mainly exerted during the hatching phase, suggesting predation on, burial of or physical injury of hatching nauplii or eggs in a late development stage as likely mechanisms. Also, the number of B. longispina maritima that hatched was reduced by M. affinis during the hatching phase, but no clear relation to density of M. affinis could be identified. The results show that M. affinis can reduce recruitment to zooplankton from benthic resting eggs. Such impact by the benthos on resting stages of zooplankton is therefore a potentially significant link between the benthic and pelagic systems.

  • 9.
    Albertsson, Jan
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Leonardsson, K
    Impact of a borrowing deposit-feeder, Monoporeia affinis, on viable zooplankton resting eggs in the northern Baltic Sea2000Inngår i: Marine Biology, ISSN 0025-3162, E-ISSN 1432-1793, Vol. 136, nr 4, s. 611-619Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We investigated the effect of different densities of the burrowing deposit-feeding amphipod Monoporeia affinis on the potential for recruitment of zooplankton from benthic resting eggs. Hatching of resting eggs was induced in the laboratory on sliced and resuspended 1-cm depth-sections of sediment cores, collected at six stations ill an archipelago area of the Gulf of Bothnia, Baltic Sea. The uppermost 5 cm of the sediment was studied. The most common species that hatched was Eurytemor affinis (Copepoda). Individuals from another copepod genus, Acartia, hatched in significant numbers only in the cores from two stations with low amphipod abundance. Cores from stations with high amphipod densities showed a deeper distribution of emerging E. affinis nauplii compared with stations with few amphipods: the oxidised sediment layer was also deeper at high M. affinis densities than at low. Total (0 to 5 cm strata pooled) number of hatched E. affinis nauplii was independent of amphipod density. This indicates that the effect of M. affinis on E. affinis eggs involves deeper burial due to bioturbation, rather than predation. Decreased benthic recruitment of zooplankton at localities with high M. affinis density is suggested, since more deeply positioned eggs are less likely to hatch. When hatching was induced in intact, non-sliced cores from one station, the number of E. affinis nauplii that hatched was on average 43% of the number that hatched in the upper centimetre of the sliced cores from the same station. This fraction (43%), if applied to the other stations, implied a potential for benthic recruitment of up to 80000 ind m(-2) for E. affinis. Due to its high abundance, M. affinis is likely to greatly reduce benthic recruitment of zooplankton in this system.

  • 10. Aljetlawi, A A
    et al.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Leonardsson, K
    Effect of food and sediment pre-treatment in experiments with a deposit-feeding amphipod, Monoporeia affinis2000Inngår i: Journal of Experimental Marine Biology and Ecology, ISSN 0022-0981, E-ISSN 1879-1697, Vol. 249, nr 2, s. 263-280Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We experimentally investigated the effects of different pre-treatments of the sediment, and the effect of daily addition of fresh phytoplankton, on the growth and survival of 1-year-old (1 +) individuals of the deposit feeder Monoporeia affinis (Amphipoda). We used three different types of sieved sediment: pre-frozen muddy clay, non-pre-frozen muddy clay, and fine sand. The muddy clay contained phytoplankton originating from the surface sediment sampled in the field during the late spring bloom. No phytoplankton was initially present in sand. The experiment lasted for 18 days. M. affinis responded to the daily phytoplankton addition by increasing growth. Phytoplankton addition had no significant effects on the survival of M. affinis. Upon phytoplankton addition, the sandy and non-frozen muddy clay gave similar growth and survival responses. In contrast, the pre-frozen sediment resulted in significantly lower growth and survival. The growth was negative in all treatments without phytoplankton. Thus, the high initial chlorophyll content in the muddy clay was not of sufficient quality or concentration to allow a positive growth response in M. affinis. The growth of M. affinis was significantly correlated with the reduction of the chlorophyll. Our results indicated that M. affinis is capable of assimilating settled phytoplankton with no, or only a few days' time delay. (C) 2000 Elsevier Science BN: All rights reserved.

  • 11. Andersson, Agneta
    et al.
    Samuelsson, Kristina
    Haecky, Pia
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Changes in the pelagic microbial food web due to artificial eutrophication2006Inngår i: Aquatic Ecology, ISSN 1386-2588, E-ISSN 1573-5125, Vol. 40, nr 3, s. 299-313Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The effect of nutrient enrichment on the structure and carbon flow in the pelagic microbial food web was studied in mesocosm experiments using seawater from the northern Baltic Sea. The experiments included food webs of at least four trophic levels; (1) phytoplankton-bacteria, (2) flagellates, (3) ciliates and (4) mesozooplankton. In the enriched treatments high autotrophic growth rates were observed, followed by increased heterotrophic production. The largest growth increase was due to heterotrophic bacteria, indicating that the heterotrophic microbial food web was promoted. This was further supported by increased growth of heterotrophic flagellates and ciliates in the high nutrient treatments. The phytoplankton peak in the middle of the experiments was mainly due to an autotrophic nanoflagellate, Pyramimonas sp. At the end of the experiment, the proportion of heterotrophic organisms was higher in the nutrient enriched than in the nutrient-poor treatment, indicating increased predation control of primary producers. The proportion of potentially mixotrophic plankton, prymnesiophyceans, chrysophyceans and dinophyceans, were significantly higher in the nutrient-poor treatment. Furthermore, the results indicated that the food web efficiency, defined as mesozooplankton production per basal production (primary production + bacterial production - sedimentation), decreased with increasing nutrient status, possibly due to increasing loss processes in the food web. This could be explained by promotion of the heterotrophic microbial food web, causing more trophic levels and respiration steps in the food web.

  • 12. Bergström, Lena
    et al.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Undervattensvegetation i Kronörens naturreservat, Västerbottens län: Inventeringar genomförda under åren 1996, 1997 och 20012003Rapport (Annet vitenskapelig)
  • 13.
    Garrison, Julie A.
    et al.
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
    Nordström, Marie C.
    Environmental and Marine Biology, Åbo Akademi University, Åbo, Finland.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Nascimento, Francisco J. A.
    Baltic Sea Centre, Stockholm University, Stockholm, Sweden.
    Temporal and spatial changes in benthic invertebrate trophic networks along a taxonomic richness gradient2022Inngår i: Ecology and Evolution, E-ISSN 2045-7758, Vol. 12, nr 6, artikkel-id e8975Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Species interactions underlie most ecosystem functions and are important for understanding ecosystem changes. Representing one type of species interaction, trophic networks were constructed from biodiversity monitoring data and known trophic links to assess how ecosystems have changed over time. The Baltic Sea is subject to many anthropogenic pressures, and low species diversity makes it an ideal candidate for determining how pressures change food webs. In this study, we used benthic monitoring data for 20 years (1980-1989 and 2010-2019) from the Swedish coast of the Baltic Sea and Skagerrak to investigate changes in benthic invertebrate trophic interactions. We constructed food webs and calculated fundamental food web metrics evaluating network horizontal and vertical diversity, as well as stability that were compared over space and time. Our results show that the west coast of Sweden (Skagerrak) suffered a reduction in benthic invertebrate biodiversity by 32% between the 1980s and 2010s, and that the number of links, generality of predators, and vulnerability of prey have been significantly reduced. The other basins (Bothnian Sea, Baltic Proper, and Bornholm Basin) do not show any significant changes in species richness or consistent significant trends in any food web metrics investigated, demonstrating resilience at a lower species diversity. The decreased complexity of the Skagerrak food webs indicates vulnerability to further perturbations and pressures should be limited as much as possible to ensure continued ecosystem functions.

    Fulltekst (pdf)
    fulltext
  • 14.
    Grimvall, Anders
    et al.
    Havsmiljöinstitutet.
    Svedäng, Henrik
    Havsmiljöinstitutet.
    Farnelid, Hanna
    Linnéuniversitetet.
    Moksnes, Per-Olav
    Havsmiljöinstitutet.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Ekosystembaserad förvaltning som metod för att hantera negativa miljötrender och oklara orsakssamband2019Rapport (Annet vitenskapelig)
    Abstract [sv]

    Havsmiljöinstitutet har på uppdrag av Miljömålsberedningen tagit fram denna underlagsrapport om ekosystembaserad förvaltning som metod för att hantera miljöstörningar och oklara orsakssamband. Rapporten utgår från ett urval negativa miljötrender som dokumenterats i forskningsrapporter och fortlöpande miljöövervakning i Östersjön och Västerhavet.

    Sedan mer än tjugo år tillbaka har röster höjts inom såväl förvaltning som forskning och i ideella organisationer för att miljöförvaltningen ska bli mer ekosysteminriktad. En ekosystembaserad förvaltning ska präglas av en helhetssyn på bevarande och hållbart nyttjande av ekosystemen. Det innebär bland annat att den ska ta hänsyn till att olika arter i ett ekosystem påverkar varandra och att samspelet mellan människa och miljö ofta spänner över flera sektorer i samhället.

    Trots ett ambitiöst arbete för en bättre havsmiljö finns det flera miljöstörningar som har förvärrats under senare år. Den samlade fiske-och miljöförvaltningen har tillexempel inte kunnat hindra att viktiga torskbestånd utarmats eller att stora arealer av det viktiga ålgräset försvunnit längs västkusten. Reproduktionsskador hos lax och sjöfågel, vilka kopplats till brist på vitamin B1(tiamin), och dramatiska förändringar i djurlivet på Östersjöns bottnar har fått än fler varningsklockor att ringa. Det är svårt att peka ut klara orsaker till dessa observerade störningar och att ta steget från forskningsresultat och miljöövervakning till åtgärder inom förvaltningen. Rapporten visar därför på betydelsen av en systemsyn inom den svenska havsmiljöförvaltningen och vikten av att skapa förvaltningsprocesser som beaktar vidden av interaktioner i ekosystemen, inklusive mänsklig påverkan, samtidigt som vi främjar ekosystemens funktionalitet och ett hållbart nyttjande av havets resurser.

  • 15. Holopainen, Reetta
    et al.
    Lehtiniemi, Maiju
    Meier, H. E. Markus
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Gorokhova, Elena
    Kotta, Jonne
    Viitasalo, Markku
    Impacts of changing climate on the non-indigenous invertebrates in the northern Baltic Sea by end of the twenty-first century2016Inngår i: Biological Invasions, ISSN 1387-3547, E-ISSN 1573-1464, Vol. 18, nr 10, s. 3015-3032Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Biological invasions coupled with climate change drive changes in marine biodiversity. Warming climate and changes in hydrology may either enable or hinder the spread of non-indigenous species (NIS) and little is known about how climate change modifies the richness and impacts of NIS in specific sea areas. We calculated from climate change simulations (RCO-SCOBI model) the changes in summer time conditions which northern Baltic Sea may to go through by the end of the twenty-first century, e.g., 2-5 A degrees C sea surface temperature rise and even up to 1.75 unit decrease in salinity. We reviewed the temperature and salinity tolerances (i.e., physiological tolerances and occurrence ranges in the field) of pelagic and benthic NIS established in-or with dispersal potential to-the northern Baltic Sea, and assessed how climate change will likely affect them. Our findings suggest a future decrease in barnacle larvae and an increase in Ponto-Caspian cladocerans in the pelagic community. In benthos, polychaetes, gastropods and decapods may become less abundant. By contrast, dreissenid bivalves, amphipods and mysids are expected to widen their distribution and increase in abundance in the coastal areas of the northern Baltic Sea. Potential salinity decrease acts as a major driver for NIS biogeography in the northern Baltic Sea, but temperature increase and extended summer season allow higher reproduction success in bivalves, zooplankton, amphipods and mysids. Successful NIS, i.e., coastal crustacean and bivalve species, pose a risk to native biota, as many of them have already demonstrated harmful effects in the Baltic Sea.

    Fulltekst (pdf)
    fulltext
  • 16. Karlson, Agnes M. L.
    et al.
    Gorokhova, Elena
    Gårdmark, Anna
    Pekcan-Hekim, Zeynep
    Casini, Michele
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Sundelin, Brita
    Karlsson, Olle
    Bergström, Lena
    Linking consumer physiological status to food-web structure and prey food value in the Baltic Sea2020Inngår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 49, nr 2, s. 391-406Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Declining physiological status in marine top consumers has been observed worldwide. We investigate changes in the physiological status and population/community traits of six consumer species/groups in the Baltic Sea (1993-2014), spanning four trophic levels and using metrics currently operational or proposed as indicators of food-web status. We ask whether the physiological status of consumers can be explained by food-web structure and prey food value. This was tested using partial least square regressions with status metrics for gray seal, cod, herring, sprat and the benthic predatory isopod Saduria as response variables, and abundance and food value of their prey, abundance of competitors and predators as predictors. We find evidence that the physiological status of cod, herring and sprat is influenced by competition, predation, and prey availability; herring and sprat status also by prey size. Our study highlights the need for management approaches that account for species interactions across multiple trophic levels.

    Fulltekst (pdf)
    fulltext
  • 17. Laine, A
    et al.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Katajisto, J
    Rissanen, H
    Luokkanen, E
    Kronholm, M
    Integrated management system for the Bothnian Bay2005Inngår i: International Association of Theoretical and Applied Limnology, Vol 29, Pt 2, Proceedings, N Ostrobothnia Reg Environm Ctr, Oulu 90101, Finland., 2005, s. 869-872Konferansepaper (Fagfellevurdert)
  • 18.
    Lobo, Leonor Q.
    et al.
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
    Izabel-Shen, Dandan
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Raymond, Caroline
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
    Gunnarsson, Jonas S.
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
    Broman, Elias
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden; Baltic Sea Centre, Stockholm University, Stockholm, Sweden.
    Nascimento, Francisco J. A.
    Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden; Baltic Sea Centre, Stockholm University, Stockholm, Sweden.
    Salinity and resource availability as drivers of Baltic benthic fungal diversity2024Inngår i: Environmental DNA, E-ISSN 2637-4943, Vol. 6, nr 1, artikkel-id e526Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Marine biodiversity consists of a complex network of organisms responsible for keeping the ecosystem's balance. Fungi are an understudied group of organisms despite their recognized importance for ecosystem processes and diversity. How fungi respond to environmental change remains poorly understood, especially in marine benthic habitats. The Baltic Sea is a brackish coastal ecosystem with steep environmental gradients in a relatively limited geographical area and is therefore a particularly good system to investigate the impact of different abiotic factors on benthic fungal diversity. This study used environmental DNA (eDNA) metabarcoding to analyze the spatial dynamics of benthic fungal diversity in the Baltic Sea and quantify the environmental drivers that shape these dynamics. Based on 59 stations spreading over 1145 km the results showed that benthic fungal communities were dominated by the phylum Chytridiomycota, and the fungal species Alphamyces chaetifer and Operculomyces laminatus from this phylum were the main drivers of the community structure dissimilarities observed between regions. Water depth and salinity were the main predictors of the benthic fungal community composition. The impact of nutrient availability was also significant, possibly related to the known role of Chytridiomycota species such as A. chaetifer and O. laminatus in nutrient cycling. Our results indicate that the benthic fungal diversity of the Baltic Sea is shaped by salinity gradients and nutrient availability and highlights that the current fungal biodiversity is at risk of species shift or decline with predicted changes in salinity due to climate change and intensified eutrophication.

    Fulltekst (pdf)
    fulltext
  • 19.
    Moksnes, Per-Olav
    et al.
    Göteborgs universitet.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Elfwing, Tina
    Stockholms universitet.
    Hansen, Joakim
    Stockholms universitet.
    Lindegarth, Mats
    Göteborgs universitet.
    Nilsson, Jonas
    Linnéuniversitetet.
    Rolff, Carl
    Stockholms universitet.
    Wikner, Johan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Sammanvägd bedömning av miljötillståndet i Havet2013Rapport (Annet vitenskapelig)
  • 20. Moksnes, Per-Olav
    et al.
    Eriander, Louise
    Hansen, Joakim
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Andersson, Mattias
    Bergström, Ulf
    Carlström, Julia
    Egardt, Jenny
    Fredriksson, Ronny
    Granhag, Lena
    Lindgren, Fredrik
    Nordberg, Kjell
    Wendt, Ida
    Wikström, Sofia
    Ytreberg, Erik
    Fritidsbåtars påverkan på grunda kustekosystem i Sverige2019Rapport (Annet vitenskapelig)
    Abstract [en]

    Sweden has a long and beautiful coastline with extensive archipelagos that offer exceptional conditions for recreational boating. There are more than 700 000 recreational boats in Sweden, which is one of the highest numbers in the world in relation to the population size. Small tidal differences and many sheltered bays also provide good conditions for storing boats at docks and piers and jetties. As a result, large areas of the Swedish coast are today covered with docks and marinas for recreational boats. The large number of boats and docks could have substantial negative effects on the environment. However, the understanding of the cumulative impact of recreational boating on Swedish coastal ecosystem has so far been incomplete. The goal with this report from the Swedish Institute for the Marine Environment has been to compile and summarize the present state of knowledge regarding how recreational boating affect shallow coastal ecosystems in Sweden, to determine the extent of the impact and if the development is sustainable. The aim has been to present scientific knowledge on these topics in an accessible way in order to facilitate the development of a more sustainable management of recreational boating in Sweden.

    The scientific literature strongly support that recreational boating generates many negative effects on the marine environment. Recreational boating requires a number of physical structures and generate a number activities that each results in several different pressures on the environment. An increased number of marinas, docks and dredged canals results in losses of important habitats, as well as long-term deterioration of the environmental conditions locally. Dredging and dumping of dredge material results in increased turbidity and dispersal of sediment, nutrients and pollutants over large areas with negative effects on many aquatic organisms, e.g. vegetation, fishes and mussels. Traffic from recreational boats and anchoring result in increased turbidity and sediment erosion as well as damage to habitats. Motor boats also create underwater noise that can disturb e.g. fishes, seals and porpoises. In addition, recreational boating result in substantial emissions of toxic substances and pollution from e.g. antifouling paint and combustion engines.

    More than 60% of all docks and marinas are found in wave sheltered, shallow (<3 m) areas with soft bottoms, despite that this environment only constitute 25% of shallow coastal areas in Sweden. These sheltered areas are well suited for storing boats, but also constitute one of the most productive and valuable environments along the coast. They are important environments for vegetation such as seagrass, pondweed and stoneworts, which in turn constitute important spawning and nursery areas for a large number of fish and invertebrates. The report shows that these shallow soft bottom environments are very sensitive to a majority of the stressors that recreational boating generate. Boating therefore create a disproportionally large impact on environments with high values.

    Although the impact from a single recreational boat or dock is limited, the cumulative effect is substantial because of the sheer number. According to recent inventories, there are today almost 110 000 docks along the Swedish coast covering almost 2 000 km of bottom. In comparison with the 1960s, the amount of docks has increased with almost 160%, which today constitutes an increase of 1 700 new docks per year. Recent studies show that vegetation is degraded as the number of docks and boats increase within shallow, wave sheltered areas. It is estimated that almost 20% of this important environment is negatively affected by recreational boating today; in the County of Stockholm and Västra Götaland around 30% of shallow, wave sheltered areas are estimated to be impacted. Despite several management measures in the last decades to decrease coastal exploitation, there are no signs that the rate of exploitation is decreasing.

    The large number of recreational boats with combustion engines, the trend of increasing engine size, and the fact that engines lack all forms of emission control result in substantial emissions of pollutants and greenhouse gases. Recent estimates suggest that the emissions from recreational boats are very high and comparable with other types of transport in Sweden. Emission of toxic copper from antifouling paint on recreational boats is also substantial and contributes to the high levels of copper in coastal waters, which is above the limit for good ecological status in 85% of the assessed coastal water bodies.

    Although most boat owners likely spend time at sea because they enjoy and care about the environment, the results presented in this report show that recreational boating have a substantial negative impact on the coastal environment, particularly in shallow, wave protected areas. In these areas, today’s use and development of recreational boating cannot be considered sustainable. However, the report also shows that there are ways to decrease the environmental impact from recreational boating. By changing the way we use and store recreational boats, and by improving management we can still allow coming generations to enjoy unexploited coastal environments with clear water and a rich plant and animal life.

    The report ends by discussing new, possible measures and solutions for a more sustainable use of recreational boats in Sweden, which could be a starting point for continuing such work. These include e.g. to identify vulnerable coastal environments in order to steer away exploitation and recreational boat traffic from these areas. By storing boats on land, the need for docks, dredging and toxic antifouling paint could decrease. Reduced speed limits and access limitations for recreational motorboats in certain areas could decrease negative impact on the most vulnerable habitats. Finally, new, environmentally friendly technology, and new financial instruments could be used to decrease negative impacts and create a more sustainable development of recreational boating. 

  • 21.
    Wikner, Johan
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Andersson, Agneta
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Hajdu, Susanna
    Höglander, Helena
    Gorokhova, Elena
    Skjevik, Ann-Turi
    Johansen, Marie
    Plankton2010Inngår i: Havet: om miljötillståndet i svenska havsområden. 2010 / [ed] Kristina Viklund (huvudredaktör), Ulrika Brenner, Annika Tidlund, Marie Svärd, Stockholm: Naturvårdsverket, 2010, s. 30-30Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 22.
    Wikner, Johan
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Andersson, Agneta
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
    Karlsson, Chatarina
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Hajdu, Susanna
    Stockholms universitet.
    Höglander, Helena
    Stockholms universitet.
    Mattsson, Lisa
    Stockholms universitet.
    Gorokhova, Helena
    Stockholms universitet.
    Skjevik, Ann-Turi
    SMHI.
    Johansen, Marie
    SMHI.
    Pelagial biologi: plankton2011Inngår i: Havet 2011: om miljötillståndet i svenska havsområden. 2011 / [ed] Maria Lewander, Malin Karlsson och Karin Lundberg, Stockholm: Naturvårdsverket, Havsmiljöinstitutet och Havs- och vattenmyndigheten , 2011, s. 30-30Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 23.
    Wikner, Johan
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Karlsson, Chatarina
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Andersson, Agneta
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF). Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap.
    Albertsson, Jan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå marina forskningscentrum (UMF).
    Hajdu, Susanna
    Stockholms universitet.
    Höglander, Helena
    Stockholms universitet.
    Mattsson, Lisa
    Stockholms universitet.
    Gorokhova, Elena
    Stockholms universitet.
    Skjevik, Ann-Turi
    SMHI.
    Johansen, Marie
    SMHI.
    Pelagial biologi: plankton2012Inngår i: Havet 2012: om miljötillståndet i svenska havsområden / [ed] Marie Svärd, Tina Johansen och Maria Lewander, Stockholm / Göteborg: Havsmiljöinstitutet och Havs- och vattenmyndigheten , 2012, s. 46-46Kapittel i bok, del av antologi (Annet vitenskapelig)
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