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Publikasjoner (10 av 80) Visa alla publikasjoner
De Schuyter, W., De Lombaerde, E., Depauw, L., De Smedt, P., Stachurska-Swakon, A., Orczewska, A., . . . Verheyen, K. (2024). Declining potential nectar production of the herb layer in temperate forests under global change. Journal of Ecology, 112(4), 832-847
Åpne denne publikasjonen i ny fane eller vindu >>Declining potential nectar production of the herb layer in temperate forests under global change
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2024 (engelsk)Inngår i: Journal of Ecology, ISSN 0022-0477, E-ISSN 1365-2745, Vol. 112, nr 4, s. 832-847Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
  1. Wild pollinators are crucial for ecosystem functioning and human food production and often rely on floral resources provided by different (semi-) natural ecosystems for survival. Yet, the role of European forests, and especially the European forest herb layer, as a potential provider of floral resources for pollinators has scarcely been quantified.
  2. In this study, we measured the potential nectar production (PNP) of the forest herb layer using resurvey data across 3326 plots in temperate forests in Europe, with an average time interval of 41 years between both surveys in order to assess (i) the importance of the forest herb layer in providing nectar for wild pollinators, (ii) the intra-annual variation of PNP, (iii) the overall change in PNP between survey periods and (iv) the change in intra-annual variation of PNP between survey periods. The PNP estimates nectar availability based on the relative cover of different plant species in the forest herb layer. Although PNP overestimates actual nectar production, relative differences amongst plots provide a valid and informative way to analyse differences across time and space.
  3. Our results show that the forest herb layer has a large potential for providing nectar for wild pollinator communities, which is greatest in spring, with an average PNP of almost 16 g sugar/m2/year. However, this potential has drastically declined (mean plot-level decline >24%).
  4. Change in light availability, associated with shifts in canopy structure and canopy composition, is the key driver of temporal PNP changes.
  5. Synthesis. Our study shows that if management activities are carefully planned to sustain nectar-producing plant species for wild pollinators, European forest herb layers and European forests as a whole can play key roles in sustaining wild pollinator populations.
Emneord
climate change, ecosystem functioning, floral resources, forest management, forestREplot, long-term vegetation resurvey, pollination, pollinator conservation, understorey
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-228903 (URN)10.1111/1365-2745.14274 (DOI)001184655900001 ()2-s2.0-85187102920 (Scopus ID)
Tilgjengelig fra: 2024-05-03 Laget: 2024-05-03 Sist oppdatert: 2024-05-03bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Domesticated Forest Landscapes in Central Scandinavia during the Iron Age: Resource Colonization for Iron and Subsistence Strategies based on Livestock
2023 (engelsk)Inngår i: Journal of field archaeology, ISSN 0093-4690, E-ISSN 2042-4582, Vol. 48, nr 4, s. 315-326Artikkel i tidsskrift (Fagfellevurdert) 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. 

Emneord
boreal, bloomery iron, charcoal, forest grazing, leaf-hay, niche construction, shielings
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-215766 (URN)10.1080/00934690.2023.2179186 (DOI)000937813100001 ()2-s2.0-85148516297 (Scopus ID)
Tilgjengelig fra: 2023-03-28 Laget: 2023-03-28 Sist oppdatert: 2023-05-09bibliografisk kontrollert
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.
Åpne denne publikasjonen i ny fane eller vindu >>Reproductive success, fruit removal and local distribution patterns in the early-flowering shrub Daphne mezereum
2023 (engelsk)Inngår i: Nordic Journal of Botany, ISSN 0107-055X, E-ISSN 1756-1051, nr 10, artikkel-id e03871Artikkel i tidsskrift (Fagfellevurdert) 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. 

Emneord
bird-dispersal, Daphne mezereum, density effects on reproduction, fruit removal, fruit set, hand pollination, insect-pollination, point-pattern analysis, spatial associations
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-220980 (URN)10.1111/njb.03871 (DOI)001052667000001 ()2-s2.0-85168573565 (Scopus ID)
Tilgjengelig fra: 2023-09-13 Laget: 2023-09-13 Sist oppdatert: 2024-01-15bibliografisk kontrollert
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.
Åpne denne publikasjonen i ny fane eller vindu >>Coproduction of Food, Cultural Heritage and Biodiversity by Livestock Grazing in Swedish Semi-natural Grasslands
2022 (engelsk)Inngår i: Frontiers in Sustainable Food Systems, E-ISSN 2571-581X, Vol. 6, artikkel-id 801327Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
conservation biology, land-use history, rural landscapes, shielings, species richness, sustainable food
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-203692 (URN)10.3389/fsufs.2022.801327 (DOI)000763454300001 ()2-s2.0-85125494733 (Scopus ID)
Tilgjengelig fra: 2022-04-08 Laget: 2022-04-08 Sist oppdatert: 2023-03-28bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Directional turnover towards larger-ranged plants over time and across habitats
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2022 (engelsk)Inngår i: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 25, nr 2, s. 466-482Artikkel i tidsskrift (Fagfellevurdert) 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. 

Emneord
alpine, biodiversity change, forest, forestREplot, GLORIA, grassland, homogenization, resurvey, winner and loser species
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-201417 (URN)10.1111/ele.13937 (DOI)000726529200001 ()34866301 (PubMedID)
Tilgjengelig fra: 2022-02-07 Laget: 2022-02-07 Sist oppdatert: 2022-03-01bibliografisk kontrollert
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.
Åpne denne publikasjonen i ny fane eller vindu >>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 (engelsk)Inngår i: Forests, ISSN 1999-4907, E-ISSN 1999-4907, Vol. 13, nr 10, artikkel-id 1715Artikkel, forskningsoversikt (Fagfellevurdert) 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.

Emneord
historical land use, forest biodiversity, livestock grazing, partial mycoheterotrophs, remnant populations
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-211610 (URN)10.3390/f13101715 (DOI)000875923400001 ()2-s2.0-85140781824 (Scopus ID)
Tilgjengelig fra: 2022-11-24 Laget: 2022-11-24 Sist oppdatert: 2022-11-28bibliografisk kontrollert
Arnell, M. & Eriksson, O. (2022). Landscape-scale range filling and dispersal limitation of woody plants. Journal of Biogeography, 49(11), 2028-2036
Åpne denne publikasjonen i ny fane eller vindu >>Landscape-scale range filling and dispersal limitation of woody plants
2022 (engelsk)Inngår i: Journal of Biogeography, ISSN 0305-0270, E-ISSN 1365-2699, Vol. 49, nr 11, s. 2028-2036Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
biogeography, dispersal limitation, dispersal systems, niche modelling, range filling, species distribution modelling, vertebrate-dispersed, woody plants
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-210346 (URN)10.1111/jbi.14485 (DOI)000859443300001 ()2-s2.0-85138701753 (Scopus ID)
Tilgjengelig fra: 2022-10-12 Laget: 2022-10-12 Sist oppdatert: 2023-10-24bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Semi-natural habitats in the European boreal region: Caught in the socio-ecological extinction vortex?
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2022 (engelsk)Inngår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 51, nr 8, s. 1753-1763Artikkel i tidsskrift (Fagfellevurdert) 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. 

Emneord
Agriculture, Biodiversity, Conservation, Farmland, Socio-ecological systems
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-203016 (URN)10.1007/s13280-022-01705-3 (DOI)000754336100002 ()35150395 (PubMedID)2-s2.0-85124662166 (Scopus ID)
Tilgjengelig fra: 2022-03-21 Laget: 2022-03-21 Sist oppdatert: 2022-08-04bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Acceptance of near-natural greenspace management relates to ecological and socio-cultural assigned values among European urbanites
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2021 (engelsk)Inngår i: Basic and Applied Ecology, ISSN 1439-1791, E-ISSN 1618-0089, Vol. 50, s. 119-131Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
Urban biodiversity conservation, Lawn management, Nature-related values, Urban grasslands, Ecological restoration, Socio-eco-logical systems, Green infrastructure, Urban greenspace
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-193306 (URN)10.1016/j.baae.2020.10.006 (DOI)000616375100011 ()
Tilgjengelig fra: 2021-05-20 Laget: 2021-05-20 Sist oppdatert: 2022-02-25bibliografisk kontrollert
Eriksson, O., Arnell, M. & Lindholm, K.-J. (2021). Historical Ecology of Scandinavian Infield Systems. Sustainability, 13(2), Article ID 817.
Åpne denne publikasjonen i ny fane eller vindu >>Historical Ecology of Scandinavian Infield Systems
2021 (engelsk)Inngår i: Sustainability, E-ISSN 2071-1050, Vol. 13, nr 2, artikkel-id 817Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
agrarian history, Iron Age, hay-meadows, land reforms, landscape history, niche construction, Green & Sustainable Science & Technology
HSV kategori
Identifikatorer
urn:nbn:se:su:diva-190987 (URN)10.3390/su13020817 (DOI)000611787600001 ()
Tilgjengelig fra: 2021-03-12 Laget: 2021-03-12 Sist oppdatert: 2022-02-25bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-7580-5135