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Vinogradova, O., Gaillard, M.-J., Andrén, E., Palm, V., Rönnby, J., Dahl, M., . . . Andrén, T. (2024). 3000 Years of past regional and local land-use and land-cover change in the southeastern Swedish coastal area: Early human-induced increases in landscape openness as a potential nutrient source to the Baltic Sea coastal waters. The Holocene, 34(1), 56-73
Open this publication in new window or tab >>3000 Years of past regional and local land-use and land-cover change in the southeastern Swedish coastal area: Early human-induced increases in landscape openness as a potential nutrient source to the Baltic Sea coastal waters
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2024 (English)In: The Holocene, ISSN 0959-6836, E-ISSN 1477-0911, Vol. 34, no 1, p. 56-73Article in journal (Refereed) Published
Abstract [en]

Reconstructions of past land use and related land-cover changes at local and regional scales are needed to evaluate the potential long-term impacts of land use on the coastal waters of the Baltic Sea. In this purpose, we selected the Gamleby area at the Swedish Baltic Sea coast for a case study. We use a new, high resolution pollen record from a small lake (Lillsjön) located 3.6 km NNW of the bay Gamlebyviken and detailed analysis of the available archeological data to reconstruct local land-use changes over the last 3000 years. To estimate land-cover change at local (2–3 km radius area) and regional (50 km radius area) scales we use four additional, published pollen records from two small and two large lakes (25–70 km S of Lillsjön) and the Landscape Reconstruction Algorithm, a pollen-vegetation modeling scheme. Results show that regional and local (small lakes Lillsjön and Hyttegöl) land-cover changes are comparable over the last 1500 years (Late Iron Age to present), and that landscape openness was much larger locally than regionally (difference of 20–40% cover over the last 500 years). The periods of largest potential impacts on the Gamlebyviken Bay from regional and local land use are 200–950 CE (Late Iron Age) and 1450 CE to present, and of lowest potential impacts 950–1450 CE. The question on whether the large landscape openness 1150–50 BCE and significant afforestation 50 BCE–200 CE reconstructed for Lillsjön’s area are characteristic of the Gamlebyviken region will require additional pollen records in the catchment area. 

Place, publisher, year, edition, pages
Sage Publications, 2024
Keywords
Archeological data, Gamlebyviken, Landscape Reconstruction Algorithm, Late Holocene, pollen analysis, REVEALS and LOVE models
National Category
Environmental Sciences Geology
Research subject
Baltic and East European studies
Identifiers
urn:nbn:se:sh:diva-52570 (URN)10.1177/09596836231200433 (DOI)001084189400001 ()2-s2.0-85174272828 (Scopus ID)
Funder
The Foundation for Baltic and East European Studies, 21-PD2-0002The Foundation for Baltic and East European Studies, 55/2017
Available from: 2023-10-26 Created: 2023-10-26 Last updated: 2024-01-12Bibliographically approved
Björdal, C. & Rönnby, J. (2023). Evaluation of in situ preservation method applied at a terrestrial archaeological shipwreck site by use of sacrificial wood samples installed for 25 years. International Biodeterioration & Biodegradation, 176, Article ID 105528.
Open this publication in new window or tab >>Evaluation of in situ preservation method applied at a terrestrial archaeological shipwreck site by use of sacrificial wood samples installed for 25 years
2023 (English)In: International Biodeterioration & Biodegradation, ISSN 0964-8305, E-ISSN 1879-0208, Vol. 176, article id 105528Article in journal (Refereed) Published
Abstract [en]

In 1995 remains of a 13th century shipwreck, “the Kronholmen cog”, was discovered in sandy soil at a golf green on the island of Gotland, Sweden. Prior to backfilling and in situ preservation, four sacrificial wood samples (SWS) of sound pine sapwood were installed for long-term monitoring of wood decaying processes. In year 2020, the site was re-opened to evaluate the protective nature of the site. All SWS and six archaeological samples were taken for a comparative analysis. Observations by light- and scanning electron microscopy showed severe microbial decomposition by fungi and bacteria. Based on occurrence of decay forms in the wood fibres, soft rot (SR) was identified as the main degrader of both SWS and in the first 2 cm of the heavily eroded archaeological material, accompanied by bacteria (type tunnelling bacteria (TB)). Moderate decay by bacteria (type erosion bacteria, EB) in archaeological samples indicated longer period during the last 700 years under waterlogged and anaerobic condition – e.g., protective. Only initial decay of erosion bacteria (EB) was observed in SWS, strongly indicating a non-protective environment during the last 25 years. Severe brown rot decay was established in SWS and archaeological wood located in the front of the wreck where burial conditions were most critical (0.5 m above groundwater level, and 0.4 below soil/air interface). Here, a total of 0.50 cm surface layer of SWS was lost, yielding an initial decay rate of 20% in 25 years. In general, surfaces were heavily attacked especially for archaeological samples, and plant roots penetrated the soft and degraded surface layer. We conclude that the site since backfilling in 1995 has been semi-oxygenated and has promoted more severe fungal decomposition of cultural heritage. Thus, the site is not able to protect and preserve the precious archaeological remains for future generations and actions must be taken. SWS are concluded to be an important technique for long term monitoring of archaeological sites preserved in situ.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Archaeology, Biodegradation, Bacteria, Fungi, In situ preservation, Soil, Shipwreck, Sacrificial samples, Wood
National Category
Archaeology
Research subject
Baltic and East European studies
Identifiers
urn:nbn:se:sh:diva-50255 (URN)10.1016/j.ibiod.2022.105528 (DOI)000901779200001 ()2-s2.0-85142159019 (Scopus ID)
Funder
Swedish National Heritage Board, RAÄ-2019-2142
Available from: 2022-11-22 Created: 2022-11-22 Last updated: 2023-01-27Bibliographically approved
Katrantsiotis, C., Dahl, M., Palm, V., Rönnby, J., Andrén, T. & Andrén, E. (2023). Holocene relative sea level changes in the Vastervik-Gamlebyviken region on the southeast coast of Sweden, southern Baltic Sea. Boreas, 52(2), 206-222
Open this publication in new window or tab >>Holocene relative sea level changes in the Vastervik-Gamlebyviken region on the southeast coast of Sweden, southern Baltic Sea
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2023 (English)In: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 52, no 2, p. 206-222Article in journal (Refereed) Published
Abstract [en]

We reconstruct the Holocene shore displacement of the Vastervik-Gamlebyviken area on the southeast coast of Sweden, characterised by a maritime cultural landscape and archaeological significance since the Mesolithic. Sediment cores were retrieved from four lake basins that have been raised above sea level due to the postglacial land uplift and eustatic sea level changes after the melting of the Fennoscandian Ice Sheet. The cores were radiocarbon dated and analysed for loss on ignition and diatoms. The isolation thresholds of the basins were determined using LiDAR data. The results provide evidence for the initiation of the first Littorina Sea transgression in this area at 8.5 thousand calibrated years before present (cal. ka BP). A relative sea level rise by similar to 7 m a.s.l. is recorded between 8.0 and 7.5 cal. ka BP with a highstand at similar to 22 m a.s.l. between 7.5 and 6.2 cal. ka BP. These phases coincide with the second and third Littorina Sea transgressions, respectively, in the Blekinge area, southern Sweden and are consistent with the final deglaciation of North America. After 6.2 cal. ka BP, the relative sea level dropped below 22 m a.s.l., and remained at similar to 20 m a.s.l. until 4.6 cal. ka BP coinciding with the fourth Littorina Sea transgression in Blekinge. From 4.6 to 4.2 cal. ka BP, the shore displacement shows a regression rate of 10 mm a(-1) followed by a slowdown with a mean value of 4.6 mm a(-1) until 1.6 cal. ka BP, when the relative sea level dropped below 3.3 m a.s.l. The Middle to Late Holocene highstand and other periods of minor sea level transgressions and/or higher salinity between 6.2 and 1.7 cal. ka BP are attributed to a combination of warmer climate and higher inflow of saline waters in the southern Baltic Sea due to stronger westerlies, caused by variations in the North Atlantic atmospheric patterns.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023
National Category
Archaeology Earth and Related Environmental Sciences
Research subject
Baltic and East European studies
Identifiers
urn:nbn:se:sh:diva-50107 (URN)10.1111/bor.12605 (DOI)000864284500001 ()2-s2.0-85139201509 (Scopus ID)
Funder
The Foundation for Baltic and East European Studies, 55/2017The Foundation for Baltic and East European Studies, 21-PD2-0002
Available from: 2022-10-21 Created: 2022-10-21 Last updated: 2023-04-13Bibliographically approved
Rönnby, J. & Björdal, C. (2023). Kronholmskoggen: Marinarkeologiska undersökningar. L1975:6999 Västergarn Kronholmen 1:3, Gotland (Västergarn RAÄ-Nr 116) (1ed.). Huddinge: Södertörns högskola
Open this publication in new window or tab >>Kronholmskoggen: Marinarkeologiska undersökningar. L1975:6999 Västergarn Kronholmen 1:3, Gotland (Västergarn RAÄ-Nr 116)
2023 (Swedish)Report (Other academic)
Abstract [sv]

Södertörns högskola utförde i oktober 2020 i samverkan med Göteborgs universitet en arkeologisk undersökning i anslutning till lämningarna av ett medeltida skepp beläget på Kronholmens golfbana, Västergarn, Gotland. Arbetet innefattade öppnandet av tre schakt inom tidigare undersökta ytor för att ta prover samt insamlande av träprover utlagda på vraket år 1995.

Skeppsvraket visar flera karaktäristiska byggnadsdrag som är typiska för det som av forskningen definierats som en kogg. Det gäller den platta botten, den branta vinkeln till stäven och tätningen med mossa. Avviker från andra koggar gör den relativt glesa spantningen och att bottenstockarna inte är av ek utan av furu. En ny analys visar att träet skeppet byggdes av är från smålandskusten och Gotland vilket är unikt bland kända koggfynd.

Dateringen visar att skeppet bör ha byggts under perioden 1245–1251. När skeppet några årtionden senare var uttjänt övergavs det på grunt vatten i vad som då var ett sund innanför ön Kronholmen. Platsen var förmodligen vid detta tillfälle en väl använd ankrings- och hamnplats. Att området är rikt på arkeologiska lämningar, både från järnåldern och medeltiden, visar att det funnits en lång tradition av sjöfartsaktivitet och handel på platsen. 

Place, publisher, year, edition, pages
Huddinge: Södertörns högskola, 2023. p. 65 Edition: 1
Series
Södertörn arkeologiska rapporter och studier
National Category
Archaeology
Identifiers
urn:nbn:se:sh:diva-50597 (URN)978-91-980346-8-4 (ISBN)
Available from: 2023-01-26 Created: 2023-01-26 Last updated: 2023-01-27Bibliographically approved
Rönnby, J. (2022). Arkeologi på Svarta havets botten. Populär arkeologi (3), 30-36
Open this publication in new window or tab >>Arkeologi på Svarta havets botten
2022 (Swedish)In: Populär arkeologi, ISSN 0281-014x, no 3, p. 30-36Article in journal, Editorial material (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Stockholm: Beakworks, 2022
National Category
Archaeology
Research subject
Historical Studies
Identifiers
urn:nbn:se:sh:diva-49505 (URN)
Available from: 2022-07-06 Created: 2022-07-06 Last updated: 2022-11-03Bibliographically approved
Rönnby, J. & Sten, S. (2022). Arkeologiska undersökningar på Sandön i höst. Gotska Sandön (1), 14-17
Open this publication in new window or tab >>Arkeologiska undersökningar på Sandön i höst
2022 (Swedish)In: Gotska Sandön, no 1, p. 14-17Article in journal (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Fårö: Gotska Sandöns hembygsförening, 2022
National Category
History and Archaeology
Research subject
Historical Studies
Identifiers
urn:nbn:se:sh:diva-49609 (URN)
Projects
Sea Change.
Available from: 2022-07-16 Created: 2022-07-16 Last updated: 2022-07-18Bibliographically approved
Rönnby, J. & Sten, S. (2022). Nya arkeologiska utgrävningar efter nästan 100 år!. Gotska Sandön : information från hembygdsföreningen (2)
Open this publication in new window or tab >>Nya arkeologiska utgrävningar efter nästan 100 år!
2022 (Swedish)In: Gotska Sandön : information från hembygdsföreningen, ISSN 2004-5360, no 2Article in journal (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Gotska Sandöns hembygdsförening, 2022
National Category
Archaeology
Research subject
Baltic and East European studies
Identifiers
urn:nbn:se:sh:diva-50494 (URN)
Projects
Sea Change
Available from: 2023-01-05 Created: 2023-01-05 Last updated: 2023-01-05Bibliographically approved
Adams, J. & Rönnby, J. (2022). The Danish Griffin: The Wreck of an Early Modern Royal Carvel from 1495. International Journal of Nautical Archaeology, 51(1), 46-72
Open this publication in new window or tab >>The Danish Griffin: The Wreck of an Early Modern Royal Carvel from 1495
2022 (English)In: International Journal of Nautical Archaeology, ISSN 1057-2414, E-ISSN 1095-9270, Vol. 51, no 1, p. 46-72Article in journal (Refereed) Published
Abstract [en]

In the waters of the Southern Baltic, off the island of Stora Ekön, lies the wreck of a ship lost in 1495 belonging to King John (Hans) of Denmark (1455–1513). This paper draws on the archaeological investigation of the site since 2013 and summarizes previous archaeological and historical research. In its design, construction, and weapons technology the ship is both a rare example of a large carvel-built ‘great ship’ from the final phase of the Middle Ages and, in its role as floating embassy, a manifestation of socio-political processes of change that transitioned medieval Europe to a global, maritime world.

Place, publisher, year, edition, pages
Taylor & Francis, 2022
National Category
Archaeology
Research subject
Historical Studies
Identifiers
urn:nbn:se:sh:diva-49198 (URN)10.1080/10572414.2022.2068803 (DOI)000804655200001 ()2-s2.0-85131357540 (Scopus ID)
Projects
The New Ship
Available from: 2022-06-11 Created: 2022-06-11 Last updated: 2022-12-23Bibliographically approved
Rönnby, J. (2021). Grifun/Gribshund (1495): Marinarkeologiska undersökningar. Huddinge: Södertörns högskola
Open this publication in new window or tab >>Grifun/Gribshund (1495): Marinarkeologiska undersökningar
2021 (Swedish)Report (Other academic)
Abstract [sv]

På norra sidan av Stora Ekön i Blekinge skärgård ligger på knappt tio meters djup vraket efter den danske unionskungen Hans skepp från år 1495. Denna skrift tar sin utgångspunkt i den marinarkeologiska undersökning som utfördes på vraket år 2019. Den innehåller även en sammanfattning av tidigare kunskaper samt en ny tolkningsdiskussion där den stora kravellens europeiska ursprung och sammanhang diskuteras.

Vraket efer Grifun/Gribshund utgör som skeppskonstruktion, avseende vapenteknologin ombord och de påträffade föremålen en frusen tidsbild av ett kungligt skepp från medeltidens slutskede. Det är en representant för en typ av nya stora skepp som i samspel med sina furstar var med och bidrog till den tidigmoderna samhällsförändringen.

Place, publisher, year, edition, pages
Huddinge: Södertörns högskola, 2021. p. 145
Series
Södertörn arkeologiska rapporter och studier
National Category
Archaeology
Research subject
Baltic and East European studies
Identifiers
urn:nbn:se:sh:diva-43026 (URN)978-91-980346-7-7 (ISBN)
Available from: 2021-01-18 Created: 2021-01-18 Last updated: 2021-01-19Bibliographically approved
Rönnby, J. (2021). The Study of Sunken Humanity. In: Anna Arnberg; Odd Johansen; Per Widén (Ed.), Under the surface: stories from Vrak - Museum of wrecks: (pp. 16-23). Stockholm: Vrak - Museum of Wrecks, en del av Statens maritima och transporthistoriska museer
Open this publication in new window or tab >>The Study of Sunken Humanity
2021 (English)In: Under the surface: stories from Vrak - Museum of wrecks / [ed] Anna Arnberg; Odd Johansen; Per Widén, Stockholm: Vrak - Museum of Wrecks, en del av Statens maritima och transporthistoriska museer , 2021, p. 16-23Chapter in book (Other academic)
Place, publisher, year, edition, pages
Stockholm: Vrak - Museum of Wrecks, en del av Statens maritima och transporthistoriska museer, 2021
National Category
Humanities and the Arts
Research subject
Historical Studies
Identifiers
urn:nbn:se:sh:diva-49200 (URN)
Available from: 2022-06-11 Created: 2022-06-11 Last updated: 2022-06-13Bibliographically approved
Projects
The Sunken Ships of the Baltic Sea. Interpretation and historical significance [A017-2007_OSS]; Södertörn University; Publications
Zwick, D. (2013). Conceptual Evolution in Ancient Shipbuilding: An Attempt to Reinvigorate a Shunned Theoretical Framework. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 46-71). Southampton: Highfield PressAdams, J. (2013). Experiencing Shipwrecks and the Primacy of Vision. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 85-96). Southampton: Highfield PressArnshav, M. (2013). From Wreck to Heritage – a Matter of Time?. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 140-150). Southampton: Highfield PressHocker, F. (2013). In Details Remembered: Interpreting the Human Component in Shipbuilding. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 72-84). Southampton: Highfield PressAdams, J. & Rönnby, J. (2013). Landscapes, Seascapes and Shipscapes. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 1-8). Southampton: Highfield PressLeino, M. (2013). Recycling Shipwrecks - examples from the 18th century fortress island of Suomenlinna. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 127-139). Southampton: Highfield PressEriksson, N. (2013). Sailing, sleeping and eating on board 17th century ships: Tapping the Potential of Baltic Sea Shipwrecks with regard to the Archaeology of Space. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 97-109). Southampton: Highfield PressRönnby, J. (2013). The Archaeological Interpretation of Shipwrecks. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 9-24). Southampton: Highfield PressTörnqvist, O. (2013). The Skeleton in the Dune: Unlocking the Explanatory Potential of Shipwrecks through Physical Landscape Studies. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 25-35). Southampton: Highfield PressAlvik, R. (2013). Things on board: The interpretation of three 18th century shipwrecks from the Gulf of Finland. In: Jonathan Adams, Johan Rönnby (Ed.), Interpreting Shipwrecks: Maritime Archaeological Approaches (pp. 119-126). Southampton: Highfield Press
Ships at War - An Archaeological and Historical Study of Early Modern Maritime Battlefields in the Baltic [A048-2012_OSS]; Södertörn University; Publications
Stadin, K. (2022). Hur känner man igen en sjöhjälte?. In: Andreas Lindroth (Ed.), Svenskt sjöförsvar 500 år: människor, politik och kulturarv. Karlskrona: MarinmuseumAdams, J. & Rönnby, J. (2022). The Danish Griffin: The Wreck of an Early Modern Royal Carvel from 1495. International Journal of Nautical Archaeology, 51(1), 46-72Rönnby, J. (2021). Grifun/Gribshund (1495): Marinarkeologiska undersökningar. Huddinge: Södertörns högskolaRönnby, J. (2020). Det danska monstret: Om en skulptur och dess skepp i början av den Nya tiden. In: Kurt Almqvist; Svante Helmbaek Tirén (Ed.), Havets bildspråk: Galjonsfigurer och symboler. Stockholm: Bokförlaget StolpeRönnby, J. (2020). The Danish Monster: A sculpture and its ship in the beginning of the Modern time. In: Kurt Almqvist Kurt; Svante Helmbaek Tirén (Ed.), The imagery of the sea: figureheads and symbols. Stockholm: Bokförlaget StolpeRönnby, J. (2019). Flera spektakulära fynd vid utgrävningarna av Gribshunden. Marinarkeologisk tidskrift (3), 4-5Rönnby, J. (2019). Furstar, nya skepp och början på det moderna. Gränsløs (10), 39-48Holmlund, J., Nilsson, B. & Rönnby, J. (2017). Joint Exploration of the Sunken Past: Examples of Maritime Archaeoogical Collaboration Between Industry and Academica in the Baltic. In: Bailey,G., Harff,J., Sakellariou. (Ed.), Under the Sea: Archaeology and Palaeolandscapes of the Continental Shelf (pp. 53-63). Cham: SpringerEriksson, N. & Rönnby, J. (2017). Mars (1564): the initial archaeological investigations of a great 16th-century Swedish warship. International Journal of Nautical Archaeology, 46(1), 92-107Eriksson, N. (2017). Riksäpplet: Arkeologiska perspektiv på ett bortglömt regalskepp (1ed.). Lund: Nordic Academic Press
Shipswrecks of the Northern Seas -Society, Innovation and Change in Northern Europe 1000 - 1900 AD. A Maritime Archaeological Perspective. [SAB16-0807:1_RJ]; Södertörn University; Publications
Rönnby, J. (2021). Grifun/Gribshund (1495): Marinarkeologiska undersökningar. Huddinge: Södertörns högskola
Seaside - A multidisciplinary study of maritime environmental history [55/2017_OSS]; Södertörn University; Publications
Vinogradova, O., Gaillard, M.-J., Andrén, E., Palm, V., Rönnby, J., Dahl, M., . . . Andrén, T. (2024). 3000 Years of past regional and local land-use and land-cover change in the southeastern Swedish coastal area: Early human-induced increases in landscape openness as a potential nutrient source to the Baltic Sea coastal waters. The Holocene, 34(1), 56-73Katrantsiotis, C., Dahl, M., Palm, V., Rönnby, J., Andrén, T. & Andrén, E. (2023). Holocene relative sea level changes in the Vastervik-Gamlebyviken region on the southeast coast of Sweden, southern Baltic Sea. Boreas, 52(2), 206-222
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-5442-1981

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