| 1. |
- Edenius, Lars, et al.
(författare)
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The effects of changing land use and browsing on aspen abundance and regeneration: a 50-year perspective from Sweden
- 2011
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Ingår i: Journal of Applied Ecology. - : Wiley. - 0021-8901 .- 1365-2664. ; 48, s. 301-309
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Tidskriftsartikel (refereegranskat)abstract
- 5. Synthesis and applications. Our results suggest that changes in land use practices are the main cause of changes in aspen abundance at regional and national scales in Sweden during the last 50 years. Restoring regeneration niches, most importantly emulating natural disturbance processes, viz. fire at various spatial scales, and retaining aspen in cleaning and pre-commercial thinnings are the most important management recommendations to secure regeneration of aspen. Protecting established aspen ramets at designated sites from browsing either by fencing or reducing ungulate numbers could be used as complementary management tools.
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| 2. |
- Ahmed, Abdulla, et al.
(författare)
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Evaluation of the European Society of Cardiology/European Respiratory Society derived three-and four-strata risk stratification models in pulmonary arterial hypertension : Introducing an internet-based risk stratification calculator
- 2023
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Ingår i: European Heart Journal Open. - : Oxford University Press (OUP). - 2752-4191. ; 3:2
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Tidskriftsartikel (refereegranskat)abstract
- Aims: Estimation of prognosis in pulmonary arterial hypertension (PAH) has been influenced by that various risk stratification models use different numbers of prognostic parameters, as well as the lack of a comprehensive and time-saving risk assessment calculator. We therefore evaluated the various European Society of Cardiology (ESC)-/European Respiratory Society (ERS)-based three-and four-strata risk stratification models and established a comprehensive internet-based calculator to facilitate risk assessment. Methods and results: Between 1 January 2000 and 26 July 2021, 773 clinical assessments on 169 incident PAH patients were evaluated at diagnosis and follow-ups. Risk scores were calculated using the original Swedish Pulmonary Arterial Hypertension Registry (SPAHR)/Comparative, Prospective Registry of Newly Initiated Therapies for Pulmonary Hypertension (COMPERA) three-strata model, the updated SPAHR three-strata model with divided intermediate risk, and the simplified three-parameter COMPERA 2.0 four-strata model. The original SPAHR/COMPERA and the updated SPAHR models were tested for both 3-6 and 7-11 available parameters, respectively. Prognostic accuracy [area under the receiver operating characteristic (ROC) curve (AUC)] and Uno's cumulative/time-dependent C-statistics (uAUC) were calculated for 1-, 3-, and 5-year mortality. At baseline, both the original SPAHR/COMPERA and the updated SPAHR models, using up to six parameters, provided the highest accuracy (uAUC = 0.73 for both models) in predicting 1-, 3-, and 5-year mortality. At follow-ups, the updated SPAHR model with divided intermediate risk (7-11 parameters) provided the highest accuracy for 1-, 3-, and 5-year mortality (uAUC = 0.90), followed by the original SPAHR/COMPERA model (7-11 parameters) (uAUC = 0.88) and the COMPERA 2.0 model (uAUC = 0.85). Conclusions: The present study facilitates risk assessment in PAH by introducing a comprehensive internet-based risk score calculator (https://www.svefph.se/risk-stratification). At baseline, utilizing the original or the updated SPAHR models using up to six parameters was favourable, the latter model additionally offering sub-characterization of the intermediate risk group. Our findings support the 2022 ESC/ERS pulmonary hypertension guidelines' strategy for risk stratification suggesting the utilization of a three-strata model at baseline and a simplified four-strata model at follow-ups. Our findings furthermore support the utility of the updated SPAHR model with divided intermediate risk, when a more comprehensive assessment is needed at follow-ups, complementing the three-parameter COMPERA 2.0 model. Larger multi-centre studies are encouraged to validate the utility of the updated SPAHR model. Take home message: By introducing an internet-based risk score calculator (https://www.svefph.se/risk-stratification), risk assessment is facilitated. Our results support the 2022 ESC/ERS pulmonary hypertension guidelines' risk stratification strategy, additionally suggesting the updated SPAHR three-strata model with divided intermediate risk, as a promising complement to the new simplified three-parameter COMPERA 2.0 four-strata strategy, when a more comprehensive overview is needed.
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| 3. |
- Andersson, Elin, et al.
(författare)
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Uppföljning av biologisk mångfald meddata från Riksskogstaxeringen : Slutrapport, mars 2012
- 2012
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Denna rapport redovisar resultatet av ett samarbete mellan två projekt, dels ett projekt inom fortlöpandemiljöanalys på SLU, lett av Artdatabanken, dels ett projekt som letts av Länsstyrelsen i Jämtlandtillsammans med Artdatabanken och Skogsstyrelsen. Det senare drivs som ett så kallat miljömålsprojekt,med medel från Naturvårdsverket. I båda projekten är Riksskogstaxeringen en samarbetspartner.Grundtanken i båda projekten är att undersöka vilka parametrar i Riksinventeringen av skog (RIS) sombäst speglar tillståndet för biologisk mångfald.I ett första steg har arbetsgruppen valt ut ett antal parametrar som bör tas fram och undersökas. I ett andrasteg har SLU tagit fram ett bakgrundsmaterial som diskuterats vidare inom gruppen. Därefter har gruppentagit fram ett preliminärt förslag på vilka parametrar som kan vara lämpliga att prioritera för uppföljningav miljömålen. Förslaget har remitterats till forskare och myndigheter som kan tänkas ha intresse avinnehållet och inkomna synpunkter har inarbetats i föreliggande slutrapport. Innehållet kan utgöralämpligt bakgrundsmaterial om tillståndet i skogen, men också som indikatorer och andra mått som kananvändas på olika sätt i uppföljning av biologisk mångfald.Övergripande kan det konstateras att RIS ger värdefull kunskap om främst utvecklingen av skogligastrukturer som trädens ålder, trädslag, beståndsålder och andra kvaliteter. Denna information kan bidra tillatt beskriva förutsättningarna för den biologiska mångfalden. Ett flertal av parametrarna har haft enpositiv utveckling under miljömålsperioden. Det är däremot inte liktydigt med att utvecklingen för denbiologiska mångfalden utvecklats i en positiv riktning. Detta på grund av att de nivåer som vi har att utgåfrån (1999) ofta ligger på en så låg nivå jämfört med många arters behov att det krävs kraftigaförändringar för att arterna ska kunna utvecklas i positiv riktning.Projektet har hitintills prioriterat drygt ett tjugotal skogliga parametrar för uppföljning av biologiskmångfald inom miljömålssystemet. Av de skogliga parametrarna har följande föreslagits få hög prioritet:•Antal gamla träd över 121 år per kvadratkilometer, indelat i åldersklasser•Areal gammal skog fördelad på skogstyper; tall, gran, barr (ädel, barrädel, barrlöv)•Volym död ved av olika trädslag; tall, gran, löv•Volym död ved av olika grovlek•Areal ädellövskog indelad i åldersklasser•Areal ädellövskog fördelat på olika klasser för mängden död vedDe arter och spårtecken från inventeringen som särskilt uppmärksammats är:•Hackmärken•Vedsvamp•Tickor•Mjölkört•Hänglavar; man- och skägglav
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| 4. |
- Benyamine, Isak, 1963-
(författare)
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Bedömning som meningsskapande resurs i handledningssamtal : Multimodala och kvalitativa diskurser i konstnärlig högskoleutbildning
- 2015
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The aim of this investigation is to describe assessment as a meaning-making process in individual supervision of students in higher education of the aesthetic field. The qualitative analyses focus on how assessment is expressed within the supervision, in relation to the artistic professional field. The study was conducted within a multimodal socio-semiotic perspective. Sadler’s notion of quality and Bourdieu’s field concept of habitus, contributes to the social practice within the professional field, and in the full analysis of the empirical material.The case study examines assessment in an authentic environment. The data consists of video recordings from ten supervisions that took place in two different courses at two different colleges. The video recordings were transcribed through a multimodal framework and focused on the teachers’ and student’s speech, body movements, gazes and gestures during the sessions. Four selected supervision sessions were analysed based on the research questions and on the theoretical framework.The analyses revealed that assessment in higher education of the aesthetic field can be expressed as a process whereby the quality is related to the professional field. The students, as well as their teachers, are immersed in relationships, traditions and institutions that shape their artistic choices and judgments.The results indicate that students' meaning-making is linked to their previous experience in the artistic field. Teachers’ expectations of this experience have crucial implications for how the supervision sessions are shaped and designed. The shift of focus in the supervisions goes from the fulfilment of goals stated in the curriculum, to the meaning making, values, and perspectives that are recognized within the field of the arts. The study underlines the importance of conceptualization of the artistic processes.The overall results confirm previous studies showing that instruction and supervision in higher education of the aesthetic field develops in relation to the teacher's authority, expertise and in relation to students' independence.
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| 5. |
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| 6. |
- Fridman, Jonas, et al.
(författare)
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Education and advice contribute to increased density of broadleaved conservation trees, but not saplings, in young forest in Sweden
- 2009
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Ingår i: Journal of Environmental Management. - : Elsevier BV. - 0301-4797 .- 1095-8630. ; 90, s. 1081–1088-
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Tidskriftsartikel (refereegranskat)abstract
- The effectiveness of different conservation policies is debated, but the policies are rarely evaluated quantitatively. A voluntary or ‘soft’ policy based mainly on education provides information about ecosystems and effects of land use, to encourage conservation action. Swedish forestry relies mainly on soft policy, with substantial resources for education and advice to more than 200,000 forest owners, while legal regulation is weak. Increased retention of broadleaved trees at clear-cutting, with environmental benefits in the conifer-dominated forestry, is important in the policy. We used the Swedish National Forest Inventory to analyse this policy for young forests in southern Sweden. Between 1983–1987 and 1998–2002 the policy had no positive effect on saplings (1.3 m tall to 4.9 cm dbh) of birch, oak, beech and other species that mostly decreased in density, due to planting of conifers and browsing by ungulates. However, broadleaved conservation trees (??15 cm dbh) increased in density, e.g. to about one oak and six birches per ha in young coniferous forest in 1998–2002. The relative increase in density was higher for large (??20 cm dbh) than for small trees (15–20 cm dbh). The density of conservation trees was higher on forestland of high than of low productivity. Thus, the soft conservation policy did not influence regeneration of saplings in this type of forestry system, but large broadleaved trees were increasingly saved at ‘clear-cuttings’. Advice and educational programmes probably contributed to this result. A continued increase in conservation trees at harvest may require economical support to forest owners
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| 7. |
- Gunnarsson, Urban, et al.
(författare)
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Mer träd på myrarna : igenväxning de senaste 20 åren
- 2010
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- SammanfattningI Riksskogstaxeringens landsomfattande inventeringar följs trädförekomstensutveckling i permanenta provytor, bl.a. på myr. I denna studie använder vi oss avRiksskogstaxeringens data för att undersöka om träd på myrar har ökat under densenaste 20-årsperioden från 1980-talet (1983-87) till 2000-talet (2003-07). Utifrånstudien kan vi dra följande slutsatser:Den stående trädvolymen på myrar har för hela Sverige ökat med 75 % och merän fördubblats i sydöstra Sverige under den studerade 20-årsperioden.Arealen trädklädd myr (med stamvolym > 25 m3 per ha) har ökat med 55 % underperioden.Igenväxningen är extra stor i S och SÖ Sverige.Myrar med höga naturvärden i Våtmarksinventeringen (VMI klass 1 objekt) harstörre andel öppen myr än lägre klassade myrar.Myrar med diken i direkt anslutning har större trädvolym än myrar utan diken ochdiken påskyndar igenväxningsprocessen.En lämplig miljöindikator för Regionalt UppföljningsSystem (RUS) i våtmarkerskulle kunna vara att följa arealutvecklingen av öppen myr (utan träd) och glestträdbevuxen myr (stamvolym upp till 25 m3 per ha). Båda arealerna börfortsättningsvis inte minska alltför kraftigt.
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| 8. |
- Götmark, Frank, 1955, et al.
(författare)
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Broadleaved tree species in conifer-dominated forestry: Regeneration and limitation of saplings in southern Sweden
- 2005
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Ingår i: Forest Ecology and Management. - : Elsevier BV. - 0378-1127. ; 214:1-3, s. 142-157
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Tidskriftsartikel (refereegranskat)abstract
- Forests and forestry in Sweden are dominated by conifers. Silviculture using mixed or broadleaved stands is often recommended, but the degree to which broadleaves regenerate naturally needs to be clarified. The Swedish National Forest Inventory is here used for a region-wide study of broadleaved saplings (1.3 m tall to 4.9 cm dbh) regenerated naturally. For 12 species (taxa) in young forests (< 7 m tall) and high forests (> 7 m), sapling densities were related to seven forest types and three productivity classes. Birch had highest densities in all but two broadleaved forest types. Birch, oak, rowan and sallow had 70-85% of their total sapling populations in conifer-dominated forest types, indicating good potential for mixed stands. Beech, lime, hornbeam, ash and elm were mostly restricted to 'noble' (hardwood) forests. The regeneration success (saplings per mature tree) for birch, rowan and oak was highest in conifer-dominated forest; beech was about equally successful in conifer-dominated and broadleaved forests, and ash was very successful in broadleaved forest. Oak regeneration may be problematical in broadleaved forests, but we suggest this is not the case in conifer-dominated forests (where oaks have rarely been studied). Sapling densities of the species in the forest types were not consistently correlated with productivity, but birch and aspen generally regenerated strongest at intermediate and at high productivity, respectively. In noble forests, oak, ash and elm regenerated strongest at low productivity. The role of asexual regeneration (sprouting) remains to clarify. Our results suggest that lime, elm, ash and some other trees currently are limited mainly by poor dispersal, rather than habitat availability. The results are promising for various forms of mixed-species forestry that does not require planting (or little planting) and that would be beneficial for nature conservation. (c) 2005 Elsevier B.V. All rights reserved.
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