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Publikationer (10 of 79) Visa alla publikationer
Eriksson, O. (2023). Domesticated Forest Landscapes in Central Scandinavia during the Iron Age: Resource Colonization for Iron and Subsistence Strategies based on Livestock. Journal of field archaeology, 48(4), 315-326
Öppna denna publikation i ny flik eller fönster >>Domesticated Forest Landscapes in Central Scandinavia during the Iron Age: Resource Colonization for Iron and Subsistence Strategies based on Livestock
2023 (Engelska)Ingår i: Journal of field archaeology, ISSN 0093-4690, E-ISSN 2042-4582, Vol. 48, nr 4, s. 315-326Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This study explores how resource colonization for iron in central Sweden during the early Iron Age may have affected the use of forest landscapes. Slag heap volume at iron production sites was used to estimate the amount of forest resources required for charcoal production. Forest resources required for livestock grazing and fodder were estimated from literature sources. To produce charcoal at iron production sites, forests were harvested, creating conditions suitable for grazing. Production of livestock winter fodder, leaf-hay, became a constraint due to the conflict between grazing grounds and fodder producing areas near main settlements. Although availability of forest was not limiting, a combination of opportunities and constraints is suggested to have promoted a new spatial ordering of land use. This included land closest to the main settlements allocated to fodder production and development of secondary seasonal settlements (shielings) at iron production sites, which could be exploited for livestock grazing. 

Nyckelord
boreal, bloomery iron, charcoal, forest grazing, leaf-hay, niche construction, shielings
Nationell ämneskategori
Arkeologi Naturgeografi
Identifikatorer
urn:nbn:se:su:diva-215766 (URN)10.1080/00934690.2023.2179186 (DOI)000937813100001 ()2-s2.0-85148516297 (Scopus ID)
Tillgänglig från: 2023-03-28 Skapad: 2023-03-28 Senast uppdaterad: 2023-05-09Bibliografiskt granskad
Arnell, M., Eriksson, O. & Ehrlén, J. (2023). Reproductive success, fruit removal and local distribution patterns in the early-flowering shrub Daphne mezereum. Nordic Journal of Botany (10), Article ID e03871.
Öppna denna publikation i ny flik eller fönster >>Reproductive success, fruit removal and local distribution patterns in the early-flowering shrub Daphne mezereum
2023 (Engelska)Ingår i: Nordic Journal of Botany, ISSN 0107-055X, E-ISSN 1756-1051, nr 10, artikel-id e03871Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In insect-pollinated, bird-dispersed plants, both investment in reproduction and reproductive success involve interactions between plants and their pollinators and dispersers. The outcome of these plant–animal interactions may be affected by the number of flowers and fruits, as well as by the plants' local environment and by spatial associations among plants. In this study we mapped the spatial distribution of individuals in a population of the early flowering, fleshy-fruited shrub Daphne mezereum, in a forest in boreo-nemoral Sweden. For all mapped individuals we collected data on numbers of flowers and fruits and fruit removal, for three consecutive years. We analysed spatial associations among individuals, and the effects on reproductive performance and fruit removal of plant height, numbers of flowers and fruits, distance to forest edge, and neighbouring flower and fruit density. Our results show that the density of D. mezereum increases with increasing proximity to forest edge. The number of flowers produced, as well as fruit set and fruit removal, show the same positive relationship with increasing proximity to forest edges. We further show that individuals are aggregated up to distances of about 10 m. The flower production of neighbouring conspecific individuals within 10 m is negatively related to fruit set whereas the fruit production of neighbours is positively related to fruit removal. Our main conclusion is that the spatial distribution of D. mezereum affects reproductive success and fruit removal, which in turn has the potential to feed back to the spatial distribution pattern. Combining studies of reproduction with spatial analyses is important to advance our understanding of the dynamics of plant populations. 

Nyckelord
bird-dispersal, Daphne mezereum, density effects on reproduction, fruit removal, fruit set, hand pollination, insect-pollination, point-pattern analysis, spatial associations
Nationell ämneskategori
Botanik Ekologi
Identifikatorer
urn:nbn:se:su:diva-220980 (URN)10.1111/njb.03871 (DOI)001052667000001 ()2-s2.0-85168573565 (Scopus ID)
Tillgänglig från: 2023-09-13 Skapad: 2023-09-13 Senast uppdaterad: 2024-01-15Bibliografiskt granskad
Eriksson, O. (2022). Coproduction of Food, Cultural Heritage and Biodiversity by Livestock Grazing in Swedish Semi-natural Grasslands. Frontiers in Sustainable Food Systems, 6, Article ID 801327.
Öppna denna publikation i ny flik eller fönster >>Coproduction of Food, Cultural Heritage and Biodiversity by Livestock Grazing in Swedish Semi-natural Grasslands
2022 (Engelska)Ingår i: Frontiers in Sustainable Food Systems, E-ISSN 2571-581X, Vol. 6, artikel-id 801327Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Livestock has been a backbone of people's livelihood as long as agriculture has existed in Scandinavia, c. 6,000 years. In the early Iron Age, c. 2,000 years ago, a land management system began to form, composed of infields (enclosed hay-meadows and crop fields) and outlying land used for livestock grazing. Despite many later innovations and societal changes affecting agricultural technology and practices, this way of organizing land use was a template for how landscapes were managed and structured until the modernization of agriculture and forestry during the last centuries. There are legacies of this historic land-use, mainly as semi-natural grasslands managed by livestock grazing (open or semi-open; long continuity of management; not much influenced by commercial fertilizers, plowing etc.). These semi-natural grasslands harbor an exceptional small-scale biodiversity, particularly plants and insects. Landscapes with semi-natural grasslands represent cultural heritage, and are appreciated for their beauty. The total area of semi-natural grasslands has declined considerably during the past 100 years, and the current trend suggest that further declines are expected. A large fraction of threatened biodiversity in Sweden thrives in these grasslands. Livestock grazing in semi-natural grasslands makes an important contribution to food production, and there is an increasing interest in consumption of products, mainly meat, from these grasslands. This implies that there is a positive feedback between food production, maintenance of biological diversity, and cultural heritage. This paper gives an overview of semi-natural grasslands, focusing on Sweden, from a historic, cultural and ecological perspective, and aims at discussing challenges and prospects for developing and maintaining positive associations between producing food, biodiversity, and cultural heritage, in the future.

Nyckelord
conservation biology, land-use history, rural landscapes, shielings, species richness, sustainable food
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
urn:nbn:se:su:diva-203692 (URN)10.3389/fsufs.2022.801327 (DOI)000763454300001 ()2-s2.0-85125494733 (Scopus ID)
Tillgänglig från: 2022-04-08 Skapad: 2022-04-08 Senast uppdaterad: 2023-03-28Bibliografiskt granskad
Staude, I. R., Pereira, H. M., Daskalova, G. N., Bernhardt-Römermann, M., Diekmann, M., Pauli, H., . . . Baeten, L. (2022). Directional turnover towards larger-ranged plants over time and across habitats. Ecology Letters, 25(2), 466-482
Öppna denna publikation i ny flik eller fönster >>Directional turnover towards larger-ranged plants over time and across habitats
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2022 (Engelska)Ingår i: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 25, nr 2, s. 466-482Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Species turnover is ubiquitous. However, it remains unknown whether certain types of species are consistently gained or lost across different habitats. Here, we analysed the trajectories of 1827 plant species over time intervals of up to 78 years at 141 sites across mountain summits, forests, and lowland grasslands in Europe. We found, albeit with relatively small effect sizes, displacements of smaller- by larger-ranged species across habitats. Communities shifted in parallel towards more nutrient-demanding species, with species from nutrient-rich habitats having larger ranges. Because these species are typically strong competitors, declines of smaller-ranged species could reflect not only abiotic drivers of global change, but also biotic pressure from increased competition. The ubiquitous component of turnover based on species range size we found here may partially reconcile findings of no net loss in local diversity with global species loss, and link community-scale turnover to macroecological processes such as biotic homogenisation. 

Nyckelord
alpine, biodiversity change, forest, forestREplot, GLORIA, grassland, homogenization, resurvey, winner and loser species
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
urn:nbn:se:su:diva-201417 (URN)10.1111/ele.13937 (DOI)000726529200001 ()34866301 (PubMedID)
Tillgänglig från: 2022-02-07 Skapad: 2022-02-07 Senast uppdaterad: 2022-03-01Bibliografiskt granskad
Eriksson, O. (2022). Floristic Legacies of Historical Land Use in Swedish Boreo-Nemoral Forests: A Review of Evidence and a Case Study on Chimaphila umbellata and Moneses uniflora. Forests, 13(10), Article ID 1715.
Öppna denna publikation i ny flik eller fönster >>Floristic Legacies of Historical Land Use in Swedish Boreo-Nemoral Forests: A Review of Evidence and a Case Study on Chimaphila umbellata and Moneses uniflora
2022 (Engelska)Ingår i: Forests, ISSN 1999-4907, E-ISSN 1999-4907, Vol. 13, nr 10, artikel-id 1715Artikel, forskningsöversikt (Refereegranskat) Published
Abstract [en]

Many forests throughout the world contain legacies of former human impacts and management. This study reviews evidence of floristic legacies in the understory of Swedish boreo-nemoral forests, and presents a case study on two currently declining forest plants, suggested to have been favored by historical use of forests. The review provides evidence of forest remnant populations of 34 grassland species. Thus, many floristic legacies have their main occurrence in semi-natural grasslands, but maintain remnant populations in forests, in some cases more than 100 years after grazing and mowing management have ceased. Despite less information on true forest understory plants appearing as legacies of historical human use of boreo-nemoral forests, a putative guild of such species is suggested. The case study on two species, Chimaphila umbellata and Moneses uniflora (Pyroleae, Ericaceae) suggests that both species are currently declining, mainly due to modern forestry and ceased livestock grazing in forests. Chimaphila maintains remnant populations during decades, due to its extensive clonal capacity and its long-lived ramets. Moneses is more sensitive, due to a lower stature, weaker clonal capacity and short-lived ramets, flowering only once during their lifetime. Thus, Moneses have more transient occurrences, and will decline rapidly under deteriorating conditions.

Nyckelord
historical land use, forest biodiversity, livestock grazing, partial mycoheterotrophs, remnant populations
Nationell ämneskategori
Lantbruksvetenskap, skogsbruk och fiske
Identifikatorer
urn:nbn:se:su:diva-211610 (URN)10.3390/f13101715 (DOI)000875923400001 ()2-s2.0-85140781824 (Scopus ID)
Tillgänglig från: 2022-11-24 Skapad: 2022-11-24 Senast uppdaterad: 2022-11-28Bibliografiskt granskad
Arnell, M. & Eriksson, O. (2022). Landscape-scale range filling and dispersal limitation of woody plants. Journal of Biogeography, 49(11), 2028-2036
Öppna denna publikation i ny flik eller fönster >>Landscape-scale range filling and dispersal limitation of woody plants
2022 (Engelska)Ingår i: Journal of Biogeography, ISSN 0305-0270, E-ISSN 1365-2699, Vol. 49, nr 11, s. 2028-2036Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Aim: The extent to which species fill their predicted current ranges and the underlying process of dispersal limitation have implications for species' abilities to track climate change. Range filling is intimately related to spatial scale, yet range filling estimates at high resolutions are largely lacking. In this study, we aim to estimate range filling and dispersal limitation at a high resolution for woody plants with different dispersal systems and habitat affinities.

Location: Sweden.

Taxon: All genera of woody plants (trees and shrubs).

Methods: We estimated landscape-scale range filling for 64 species. Two main dispersal systems, vertebrate dispersal and abiotic dispersal, occurred among these species. Range filling was estimated as the realized range divided by the potential range, that is, the occupied proportion of a species' modelled range, at a 1 km2 resolution. We estimated potential ranges using species distribution models and realized ranges from presence records. To increase the likelihood that absences represented true absences the estimations were restricted to areas with high sampling effort. We tested the effects of dispersal system on range filling, controlling for species' habitat affinities.

Results: Vertebrate-dispersed woody species had significantly lower landscape-scale range filling than species with abiotic dispersal. Range filling was also linked to habitat affinity. Species associated with intermediate levels of light and moisture had the highest range filling estimates.

Main conclusions: Landscape-scale range filling of woody species is linked to their dispersal traits. When controlling for habitat affinity, our result suggests that dispersal limitation partly explains the lower occupancy in suitable habitat found for vertebrate-dispersed plants. Given that vertebrate-dispersed species fail to reach suitable habitats at this scale, they are less likely to track changes in climate than woody plants with abiotic dispersal.

Nyckelord
biogeography, dispersal limitation, dispersal systems, niche modelling, range filling, species distribution modelling, vertebrate-dispersed, woody plants
Nationell ämneskategori
Geovetenskap och miljövetenskap Biologiska vetenskaper
Identifikatorer
urn:nbn:se:su:diva-210346 (URN)10.1111/jbi.14485 (DOI)000859443300001 ()2-s2.0-85138701753 (Scopus ID)
Tillgänglig från: 2022-10-12 Skapad: 2022-10-12 Senast uppdaterad: 2023-10-24Bibliografiskt granskad
Herzon, I., Raatikainen, K. J., Helm, A., Rūsiņa, S., Wehn, S. & Eriksson, O. (2022). Semi-natural habitats in the European boreal region: Caught in the socio-ecological extinction vortex?. Ambio, 51(8), 1753-1763
Öppna denna publikation i ny flik eller fönster >>Semi-natural habitats in the European boreal region: Caught in the socio-ecological extinction vortex?
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2022 (Engelska)Ingår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 51, nr 8, s. 1753-1763Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We propose to consider semi-natural habitats—hotspots for biodiversity—being caught in a socio-ecological extinction vortex, similar to the phenomenon described for species threatened with extinction. These habitats are essentially socioecological systems, in which socioeconomic drivers are interlinked with ecological processes. We identify four highly interlinked and mutually reinforcing socio-economic processes, pertaining to the importance of semi-natural habitats for (i) agricultural production, (ii) policy, research and development; (iii) vocational education in the fields of agricultural sciences and (iv) public’s experiences with semi-natural habitats. Evidence from six countries in the boreal region demonstrates that recent slowing down or even reversal of two processes are insufficient to stop the extinction vortex phenomenon. We suggest research directions to ascertain the phenomenon, monitor its development and develop proactive actions to weaken the vortex. It is highly plausible that interventions directed at most, if not all, of the key vortex processes are needed to reverse the overall deteriorating trends of a socio-ecological system. 

Nyckelord
Agriculture, Biodiversity, Conservation, Farmland, Socio-ecological systems
Nationell ämneskategori
Annan samhällsvetenskap Biologiska vetenskaper
Identifikatorer
urn:nbn:se:su:diva-203016 (URN)10.1007/s13280-022-01705-3 (DOI)000754336100002 ()35150395 (PubMedID)2-s2.0-85124662166 (Scopus ID)
Tillgänglig från: 2022-03-21 Skapad: 2022-03-21 Senast uppdaterad: 2022-08-04Bibliografiskt granskad
Lampinen, J., Tuomi, M., Fischer, L. K., Neuenkamp, L., Alday, J. G., Bucharova, A., . . . Klaus, V. H. (2021). Acceptance of near-natural greenspace management relates to ecological and socio-cultural assigned values among European urbanites. Basic and Applied Ecology, 50, 119-131
Öppna denna publikation i ny flik eller fönster >>Acceptance of near-natural greenspace management relates to ecological and socio-cultural assigned values among European urbanites
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2021 (Engelska)Ingår i: Basic and Applied Ecology, ISSN 1439-1791, E-ISSN 1618-0089, Vol. 50, s. 119-131Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Grasslands are widespread elements of urban greenspace providing recreational, psychological and aesthetic benefits to city residents. Two urban grassland types of contrasting management dominate urban greenspaces: frequently mown, species-poor short-cut lawns and less intensively managed, near-natural tall-grass meadows. The higher conservation value of tall-grass meadows makes management interventions such as converting short-cut lawns into tall-grass meadows a promising tool for urban biodiversity conservation. The societal success of such interventions, however, depends on identifying the values urban residents assign to different types of urban grasslands, and how these values translate to attitudes towards greenspace management. Using 2027 questionnaires across 19 European cities, we identify the assigned values that correlate with people's personal greenspace use and their preferences for different types of urban grasslands to determine how these values relate to the agreement with a scenario of converting 50% of their cities' short-cut lawns into tall-grass meadows. We found that most people assigned nature-related values, such as wildness, to tall-grass meadows and utility-related values, such as recreation, to short-cut lawns. Positive value associations of wildness and species richness with tall-grass meadows, and social and nature related greenspace activities, positively correlated with agreeing to convert short-cut lawns into tall-grass meadows. Conversely, disapproval of lawn conversion correlated with positive value associations of cleanliness and recreation potential with short-cut lawns. Here, people using greenspaces for nature-related activities were outstandingly positive about lawn conversion. The results show that the plurality of values assigned to different types of urban grasslands should be considered in urban greenspace planning. For example, tall-grass meadows could be managed to also accommodate the values associated with short-cut lawns, such as tidiness and recreation potential, to support their societal acceptance.

Nyckelord
Urban biodiversity conservation, Lawn management, Nature-related values, Urban grasslands, Ecological restoration, Socio-eco-logical systems, Green infrastructure, Urban greenspace
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
urn:nbn:se:su:diva-193306 (URN)10.1016/j.baae.2020.10.006 (DOI)000616375100011 ()
Tillgänglig från: 2021-05-20 Skapad: 2021-05-20 Senast uppdaterad: 2022-02-25Bibliografiskt granskad
Eriksson, O., Arnell, M. & Lindholm, K.-J. (2021). Historical Ecology of Scandinavian Infield Systems. Sustainability, 13(2), Article ID 817.
Öppna denna publikation i ny flik eller fönster >>Historical Ecology of Scandinavian Infield Systems
2021 (Engelska)Ingår i: Sustainability, E-ISSN 2071-1050, Vol. 13, nr 2, artikel-id 817Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Infield systems originated during the early Iron Age and existed until the 19th century, although passing many transitions and changes. The core features of infield systems were enclosed infields with hay-meadows and crop fields, and unenclosed outland mainly used for livestock grazing. We examine the transitions and changes of domesticated landscapes with infield systems using the framework of human niche construction, focusing on reciprocal causation affecting change in both culture and environment. A first major transition occurred during the early Middle Ages, as a combined effect of a growing elite society and an increased availability of iron promoted expansion of villages with partly communal infields. A second major transition occurred during the 18th and 19th centuries, due to a then recognized inefficiency of agricultural production, leading to land reforms. In outlands, there was a continuous expansion of management throughout the whole period. Even though external factors had significant impacts as well, human niche construction affected a range of cultural and environmental features regarding the management and structure of domesticated landscapes with infield systems. Thus, niche construction theory is a useful framework for understanding the historical ecology of infield systems.

Nyckelord
agrarian history, Iron Age, hay-meadows, land reforms, landscape history, niche construction, Green & Sustainable Science & Technology
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
urn:nbn:se:su:diva-190987 (URN)10.3390/su13020817 (DOI)000611787600001 ()
Tillgänglig från: 2021-03-12 Skapad: 2021-03-12 Senast uppdaterad: 2022-02-25Bibliografiskt granskad
Eriksson, O. & Glav Lundin, L. (2021). Legacies of historic charcoal production affect the forest flora in a Swedish mining district. Nordic Journal of Botany, 39(11), Article ID e03312.
Öppna denna publikation i ny flik eller fönster >>Legacies of historic charcoal production affect the forest flora in a Swedish mining district
2021 (Engelska)Ingår i: Nordic Journal of Botany, ISSN 0107-055X, E-ISSN 1756-1051, Vol. 39, nr 11, artikel-id e03312Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Iron production was historically associated with major impacts on forests worldwide, as vast amounts of wood were harvested to produce the charcoal needed for heating the furnaces and reducing iron oxides in the ore to iron. This impact has left abundant legacies which potentially may remain in the present-day vegetation. We investigated how remains of historic charcoal production, mainly from the 18th to the early 20th century, at still remaining charcoal kiln platforms (CKPs), affect the current species richness, species occurrences and cover of vascular plants in the ground vegetation in a Swedish mining district located in the boreo-nemoral forest zone. CKPs have a significantly higher species richness than the surrounding forest, and they also affect cover (negatively) for ericaceous species typically dominating the forest ground vegetation. Several forest species are more frequent at CKPs, and these also harbor significantly more uncommon species, of which many are typical for traditionally managed grasslands. These latter species are likely to represent remnants in present-day forests reflecting former land-use such as livestock grazing. The soil chemistry at CKPs is strongly deviating from the surrounding forest, and this, together with a lower cover of ericaceous shrubs, are the most likely mechanisms behind the higher species richness. CKPs represent conspicuous and abundant historic anthropogenic habitats in the forest vegetation. As far as we are aware, the flora at CKPs in boreal and boreo-nemoral forests has not previously been investigated in detail, and they deserve more attention, both from a biological and a cultural–historical perspective. 

Nyckelord
biological cultural heritage, boreo-nemoral forests, charcoal kiln platforms, relict charcoal hearths, remnant populations, species richness
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
urn:nbn:se:su:diva-216422 (URN)10.1111/njb.03312 (DOI)000706646600001 ()2-s2.0-85116899610 (Scopus ID)
Tillgänglig från: 2023-04-13 Skapad: 2023-04-13 Senast uppdaterad: 2023-04-13Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-7580-5135

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