| 1. |
- Johnsson, Anna-Ida, et al.
(författare)
-
Specific SCAR markers and multiplex real-time PCR for quantification of two Trichoderma biocontrol strains in environmental samples
- 2011
-
Ingår i: BioControl. - : Springer Science and Business Media LLC. - 1386-6141 .- 1573-8248. ; 56, s. 903-913
-
Tidskriftsartikel (refereegranskat)abstract
- Several strains from the genus Trichoderma (Ascomycetes, Hypocreales) are commercially used as biocontrol agents, e.g. in formulations containing the two Trichoderma strains IMI206039 (Hypocrea parapilulifera B.S. Lu, Druzhinina & Samuels) and IMI206040 (T. atroviride P. Karst). To quantify the presence of the two isolates after application, we developed primers for SCAR markers (Sequence-Characterised Amplified Region). In order to quantify both fungal strains simultaneously, we also designed fluorophore-labelled probes distinguishing the two strains, to be used in combination with the SCAR primers. In incubations of two different soils, artificially inoculated and maintained under controlled conditions, the quantification through amplification with the SCAR markers in qPCR and through colony-forming units from plate counting correlated well. Further tests of the markers on samples taken from a golf green treated with a product containing both strains indicated that the two biocontrol strains did not establish, either on the golf green or in the surrounding area.
|
|
| 2. |
|
|
| 3. |
- Von Rosen, Dietrich
(författare)
-
Non-negative estimation of variance components in heteroscedastic one-way random-effects ANOVA models
- 2010
-
Ingår i: Statistics. - : Informa UK Limited. - 0233-1888 .- 1029-4910. ; 44, s. 557-569
-
Tidskriftsartikel (refereegranskat)abstract
- There is a considerable amount of literature dealing with inference about the parameters in a heteroscedastic one-way random-effects ANOVA model. In this paper, we primarily address the problem of improved quadratic estimation of the random-effect variance component. It turns out that such estimators with a smaller mean squared error compared with some standard unbiased quadratic estimators exist under quite general conditions. Improved estimators of the error variance components are also established.
|
|
| 4. |
- Skovsgaard, Jens Peter
(författare)
-
Bog om tarmvridrøn
- 2013
-
Ingår i: Skoven. - 0106-8539. ; 45, s. 551-551
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Book review N. Mayer & R.T. Klumpp (ed.) 2013: Elsbeere in Österreich – Monographie. Verein zur Erhaltung, Pflege und Vermarktung der Elsbeere - Genussregion Wiesenwienerwald Elsbeere, Michelbach.
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
- Messing, Ingmar
(författare)
-
Land and land use : Natural preconditions
- 2011
-
Ingår i: Agriculture and Forestry in Sweden since 1900- a cartographic description. - 9789187760617 ; , s. 14-22
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
| 10. |
- Messing, Ingmar
(författare)
-
Marken i Sverige : Naturliga förutsättningar
- 2011
-
Ingår i: Sveriges nationalatlas. Jordbruk och skogsbruk i Sverige sedan år 1900: en kartografisk beskrivning. - 9789187760594 ; , s. 14-22
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
| 11. |
- Messing, Ingmar, et al.
(författare)
-
Rovdrift på åkermark i Uppsala
- 2012
-
Ingår i: Upsala nya tidning. - 1104-0173. ; , s. 5-
-
Annan publikation (populärvet., debatt m.m.)
|
|
| 12. |
- Thulin, Carl-Gustaf
(författare)
-
Utsättning av arter : möjlighet för bevarandebiologin
- 2010
-
Ingår i: Biodiverse. - 1401-5064. ; 15, s. 8-9
-
Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Ett halvöppet, lövträdsdominerat landskap med betande hjortdjur, visenter, förvildad nötboskap och vildsvin, jagade av livskraftiga populationer av varg, björn och lo. Utopier och vilda fantasier? Kanske i delar, men något håller definitivt på att hända med bevarandet, återskapandet och skötseln av de europeiska vildmarkerna
|
|
| 13. |
- Tunon, Håkan, et al.
(författare)
-
Kulturarv och hållbar utveckling
- 2010
-
Ingår i: Bebyggelsehistorisk tidskrift. - : Föreningen Bebyggelsehistorisk tidskrift. - 0349-2834 .- 2002-3812. ; , s. 99–106-
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
|
|
| 14. |
|
|
| 15. |
- Norman, Johan
(författare)
-
Skogen – en plats för upplevelser
- 2011
-
Ingår i: Grön Entreprenör, Naturupplevelse och hälsa – forskningen visar vägen. - 9789157690364 ; , s. 62-75
-
Bokkapitel (populärvet., debatt m.m.)
|
|
| 16. |
- Palsdottir, Anna Maria, et al.
(författare)
-
Nature-Based Therapeutic Interventions
- 2011
-
Ingår i: Forests, Trees and Human Health. - Dordrecht : Springer Netherlands. - 9789048198054 ; , s. 309-342
-
Bokkapitel (övrigt vetenskapligt/konstnärligt)
|
|
| 17. |
- Salomon, Björn, et al.
(författare)
-
Evolutionary process of Hordeum brachyantherum 6x and related tetraploid species revealed by nuclear DNA sequences
- 2009
-
Ingår i: Breeding Science. - : Japanese Society of Breeding. - 1344-7610 .- 1347-3735. ; 59, s. 611-616
-
Tidskriftsartikel (refereegranskat)abstract
- A hexaploid form of Hordeum brachlyantherum ssp. brachyantherum was discovered in California in 1980, and its origin has since been studied over the past three decades. We applied EF-G, a nuclear DNA sequence, to infer the parents of the hexaploid form. In polyploid taxa, amplified DNAs were cloned into a vector, and EF-G copies were amplified from the colonies by PCR and digested with restriction enzymes to separate different types. Phylogenetic analysis was performed based on the DNA sequences. The result showed that H. brachyantherum ssp. brachyantherum 6x and 4x carried one identical DNA sequence of 910 bp, and had closely related DNA sequences of 931 bp. H. brachyantherum ssp. brachyantherum 6x and H. marinum ssp. gussoneanum 2x shared one identical DNA sequence of 915 bp. From these results we hypothesized that H. brachyantherum ssp. brachyantherum 6x has evolved by an outcrossing between H. marinum ssp. gussoneanum 2x and H. brachyantherum ssp. brachyantherum 4x, followed by a chromosome doubling. Our results also indicate that H. marinum was involved in the polyploidization of H. secalinum, H. capense, and H. marinum. The origins of H. jubatum and H. depressum are discussed.
|
|
| 18. |
|
|
| 19. |
|
|
| 20. |
|
|
| 21. |
|
|
| 22. |
|
|
| 23. |
|
|
| 24. |
|
|
| 25. |
|
|
| 26. |
- Götmark, Frank, 1955, et al.
(författare)
-
Factors influencing presence-absence of oak (Quercus spp.) seedlings after conservation-oriented partial cutting of high forests in Sweden
- 2011
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 26, s. 136-145
-
Tidskriftsartikel (refereegranskat)abstract
- We studied occurrence of oak seedlings (Quercus robur L. and Q. petraea Liebl.) in 11 semi-natural oak-rich temperate forests in south Sweden after partial cutting (mean harvest; 26% of basal area). Earlier studies show that canopy openness is positively correlated with oak seedling performance. We used 20 pairs of subplots in each forest, with and without oak seedlings and matched with respect to canopy openness, to analyse other factors associated with seedling establishment and growth. The height of the ground layer (herbs and woody plants) had negative influence, i.e. higher height was associated with reduced probability of seedling occurrence. Higher soil water content had positive influence on seedling occurrence. Protection of seedlings by e.g. Rubus spp., twigs or dead wood was associated with lower seedling occurrence, but seedlings that did establish there tended to be taller. Type of ground vegetation and species composition did not differ between subplots with and without oak seedling. Thus, after conservation-oriented partial cutting of closed canopy high forests, increasing height of the ground vegetation disfavours oak seedlings (independent of canopy openness). High soil moisture favours oak seedlings, as does protected microsites for seedlings that can maintain high growth rate among their competitors.
|
|
| 27. |
- Jacobsson, Karin, et al.
(författare)
-
Bacteria considered as biocontrol agents to control growth of white clover on golf courses
- 2010
-
Ingår i: Acta Agriculturae Scandinavica, Section B - Soil and Plant Science. - : Informa UK Limited. - 0906-4710 .- 1651-1913. ; 60, s. 193-198
-
Tidskriftsartikel (refereegranskat)abstract
- In recreational areas, such as parks and golf courses, plants like white clover are considered as weeds. In an attempt to identify biocontrol agents that can be used to control growth of clover, a number of bacterial isolates were studied. Two approaches were considered: soil treatment for suppression of Rhizobium leguminosarum, a symbiotic bacteria providing clover with nitrogen, and direct suppression by leaf-spray treatment. Selected bacterial isolates were first screened against R. leguminosarum in a dual culture. Some of the tested isolates significantly inhibited the growth of R. leguminosarum. Soil inoculation of these isolates had a significant growth-reducing effect on clover seedlings. Leaf-spray treatment of bacteria had a significant impact on clover growth. Depending on the plant growth stage, this effect can reach up to 86% reduction in clover shoot dry weight. Different temperatures did not influence the effect on clover. The growth-reducing effect of bacteria was also shown on another important dicotyledonous weed, Chenopodium album.
|
|
| 28. |
- Jensen, Anna M, et al.
(författare)
-
Shrubs protect oak seedlings against ungulate browsing in temperate broadleaved forests of conservation interest: A field experiment
- 2012
-
Ingår i: Forest Ecology and Management. - : Elsevier BV. - 0378-1127 .- 1872-7042. ; 266, s. 187-193
-
Tidskriftsartikel (refereegranskat)abstract
- In many oak-rich temperate broadleaved forests of conservation value, high ungulate browsing pressure restricts oak regeneration. We examined the protection of oak (Quercus sp.) seedlings from browsing provided by naturally occurring shrubs in 10 forests across southern Sweden over 3 years. We planted oak seedlings in four plots in each forest; two with naturally regenerated shrubs and two with no shrubs. Ungulate browsers were excluded from two plots at each site, one with and one without shrubs. Fencing provided the best protection against ungulate browsers for the seedlings. The probability of a seedling being browsed (browsing frequency) was approximately 20% units lower for individuals growing among shrubs than for individuals growing in the absence of shrubs. When browsing did occur, the intensity (measured as a reduction in height growth) was significantly lower for seedlings in shrubs. Regression analyses showed that browsing frequency increased on seedlings in tall shrubs, and decreased on seedlings that had been browsed previously. Browsing intensity decreased if the seedling grew in tall and dense shrubs. Browsing frequency and intensity increased on oak seedlings that over topped the shrub canopy. Increased abundance of the prickled Rubus idaeus and Rubus fruticosus coll. in plots with shrubs did not affect browsing frequency and intensity. Two and a half years after planting, oak seedling mortality increased by the presence of shrubs. Although shrubs restricted oak seedling growth, we conclude that shrubs initially facilitated oak regeneration by concealment, and subsequently by numeric dilution. Shrubs may be used to reduce browsing damages if long-term evaluation indicates a net positive outcome for oak survival and growth.
|
|
| 29. |
|
|
| 30. |
- Klemedtsson, Åsa Kasimir, 1956
(författare)
-
Lustgasavgång från jordbruksmark
- 2009
-
Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Regeringen fattade den 26 juni 2008 beslut om ändring av Jordbruksverkets regleringsbrev rörande uppdraget ”Åtgärdsprogram för minskade växtnäringsförluster” vilket ersätts av uppdraget; ”Jordbruksverket ska efter samråd med berörda myndigheter och organisationer lämna förslag till ett handlingsprogram för minskade växtnärings- och växthusgasförluster från jordbruket för perioden 2011 till och med 2016 med utblick till 2020.” Framtagandet av ett handlingsprogram inom jordbruksverket bedrivs som ett projekt vilket ska utgöra underlag för vidare beslut och genomförande. Föreslagna åtgärder och styrmedel ska vara realistiska, genomförbara och kostnadseffektiva. Förslag till nytt handlingsprogram ska vara färdigt våren 2010. Som ett led i projektet gavs ett uppdrag till Åsa Kasimir Klemedtsson att utreda och ge förslag till möjliga åtgärder i jordbruket som kan minska lustgasavgången från jordbruksmark. Rapporteringen följer de anvisningar som gavs.
|
|
| 31. |
- Langeveld, H., et al.
(författare)
-
Assessing Environmental Impacts of Short Rotation Coppice (SRC) Expansion: Model Definition and Preliminary Results
- 2012
-
Ingår i: Bioenergy Research. - : Springer Science and Business Media LLC. - 1939-1242 .- 1939-1234. ; 5:3, s. 621-635
-
Tidskriftsartikel (refereegranskat)abstract
- Short rotation coppice (SRC) systems can play a role as feedstock for bioenergy supply contributing to EU energy and climate policy targets. A scenario depicting intensive arable crop cultivation in a homogeneous landscape (lacking habitat structures) was compared to a scenario including SRC cultivation on 20 % of arable land. A range of indicators was selected to assess the consequences of SRC on soil, water and biodiversity, using data from the Rating-SRC project (Sweden and Germany). The results of the assessment were presented using spider diagrams. Establishment and use of SRC for bioenergy has both positive and negative effects. The former include increased carbon sequestration and reduced GHG emissions as well as reduced soil erosion, groundwater nitrate and surface runoff. SRC can be used in phytoremediation and improves plant and breeding bird biodiversity (exceptions: grassland and arable land species) but should not be applied in dry areas or on soils high in toxic trace elements (exception: cadmium). The scenario-based analysis was found useful for studying the consequences of SRC cultivation at larger scales. Limitations of the approach are related to data requirements and compatibility and its restricted ability to cover spatial diversity and dynamic processes. The findings should not be generalised beyond the representativeness of the data used.
|
|
| 32. |
|
|
| 33. |
|
|
| 34. |
- Linner, Harry, et al.
(författare)
-
Agricultural land needs protection
- 2011
-
Ingår i: NJF Report. - 1653-2015. ; 7, s. 29-34
-
Annan publikation (övrigt vetenskapligt/konstnärligt)
|
|
| 35. |
|
|
| 36. |
- Messing, Ingmar, et al.
(författare)
-
Bygg inte på kultur- och åkermark
- 2009
-
Ingår i: Upsala nya tidning. - Uppsala. - 1104-0173. ; :2 maj, s. 4-
-
Tidskriftsartikel (populärvet., debatt m.m.)
|
|
| 37. |
- Messing, Ingmar
(författare)
-
Uppsalaslätten i ett framtidsperspektiv
- 2011
-
Ingår i: Att planera för 2000-talet - exemplet Uppsala. - 9789163389863 ; , s. 149-172
-
Bokkapitel (populärvet., debatt m.m.)
|
|
| 38. |
- Messing, Ingmar, et al.
(författare)
-
Viktig åkermark hotas
- 2010
-
Ingår i: Upsala nya tidning. - 1104-0173.
-
Tidskriftsartikel (populärvet., debatt m.m.)
|
|
| 39. |
|
|
| 40. |
- Ranius, Thomas, et al.
(författare)
-
Development of tree hollows in pedunculate oak (Quercus robur)
- 2009
-
Ingår i: Forest Ecology and Management. - : Elsevier BV. - 0378-1127 .- 1872-7042. ; 257, s. 303-310
-
Tidskriftsartikel (refereegranskat)abstract
- Many invertebrates, birds and mammals are dependent on hollow trees. For landscape planning that aims at persistence of species inhabiting hollow trees it is crucial to understand the development of such trees. In this study we constructed an individual-based simulation model to predict diameter distribution and formation of hollows in oak tree populations. Based on tree ring data from individual trees, we estimated the ages when hollow formation commences for pedunculate oak (Quercus robur) in southeast Sweden. At ages of about 200-300 years, 50% of the trees had hollows. Among trees < 100 years old, less than 1% had hollows, while all > 400-year-old trees had hollows. Hollows formed at earlier ages in fast-growing trees than in slow-growing trees, which may be because hollows are formed when big branches shed, and branches are thicker on fast-growing trees in comparison to slow-growing trees of the same age. The simulation model was evaluated by predicting the frequency of presence of hollows in relation to tree size in seven oak stands in the study area. The evaluation suggested that future studies should focus on tree mortality at different conditions. Tree ring methods on individual trees are useful in studies on development of hollow trees as they allow analysis of the variability in time for hollow formation among trees. (C) 2008 Elsevier B.V. All rights reserved.
|
|
| 41. |
|
|
| 42. |
|
|
| 43. |
|
|
| 44. |
|
|
| 45. |
- Iwarsson, Mattias
(författare)
-
'Norby' – en ny svarta vinbärssort
- 2011
-
Ingår i: Hemträdgården. - 0018-0343. ; , s. 21-22
-
Tidskriftsartikel (populärvet., debatt m.m.)abstract
- This article describes a new variety of Black Currant called Ribes nigrum ‘Norby’. It was found 30 years ago in the quarter of Uppsala called Norby. It was found on a waste place in the Town forest (Stadsskogen) and is probably an old variety more than 60 years old or a new variety raised from seeds. The new variety is called ‘Norby’ from the original locality. It is an upright growing shrub, which is resistant to gall mites and it is also well resistant to mildew. A herbarium specimen, Iwarsson 2011, of the new variety will be deposited in (UPS), Museum of Evolution, Botany at Uppsala University
|
|
| 46. |
- Levinsson, Anna, et al.
(författare)
-
Influence of nursery production system on water status in transplanted trees
- 2014
-
Ingår i: Scientia Horticulturae. - : Elsevier. - 0304-4238 .- 1879-1018. ; 178, s. 124-131
-
Tidskriftsartikel (refereegranskat)abstract
- The objective of this study was to investigate the influence of the nursery production system on post-transplant water uptake and stress in urban trees during the establishment phase. Field-grown trees of sweet cherry (Prunus avium L) and red oak (Quercus rubra L) were either transplanted as bare-rooted or balled & burlapped, or subjected to fine-root-stimulating measures (in so called pre-establishing systems) as root-pruning, air-potting or fabric-container-cultivation in the nurseries one year prior to transplanting. All trees were planted at two sites: one occasionally dry site in the city of Malmö and one with adequate water supply at all times, at an experimental rural site at Alnarp campus, both in Sweden. Shoot water potential was determined every third week at midday and pre-dawn the following morning during the three first years after transplanting. Leaf surface area was measured annually. The red oak trees from the pre-establishing systems showed higher water potentials at every measuring occasion compared to that of bare-rooted red oak trees at the rural site during the first year. The air-potted sweet cherry trees at the rural site had higher midday water potential than the bare-rooted trees at every measuring occasion during the first year. Leaf surface area was larger for air-potted red oaks than bare-rooted red oaks during the first post-transplant year (p < 0.001, both sites). The differences between the production systems did not persist during the following two years. Leaf surface area was restored to pre-transplant size in all trees at the rural site after three years but still reduced at the urban site. These results suggest that the pre-establishing systems do have an impact on water status when soil water availability is sufficient, but less significance in typically urban areas, with limited soil water during the initial post-transplant phase. The results indicate that red oak and sweet cherry trees planted in an urban context, with occasionally low soil water amounts, are not favored by cultivation in pre-establishing systems prior to transplant, and that low water availability cannot be compensated for by high amounts of fine roots. Good establishment management is required also for trees submitted to pre-establishing measures.
|
|
| 47. |
- Levinsson, Anna, et al.
(författare)
-
Visual assessments of establishment success in urban Prunus avium (L.) and Quercus rubra (L.) in relation to water status and crown morphological characteristics
- 2015
-
Ingår i: Urban Forestry & Urban Greening. - : Elsevier. - 1618-8667 .- 1610-8167. ; 14:2, s. 218-224
-
Tidskriftsartikel (refereegranskat)abstract
- Assessing the establishment of newly planted urban trees is important to ensure that establishmentmanagement is maintained as long as needed. Such assessment is often based on visual appraisal of the post-transplant vitality two or three years after planting. How visual assessments relate to water status in the trees, or which morphological characteristics that are driving forces in such assessments have received limited attention in past research. In this interdisciplinary study, several leaf characteristics, such as leafshape, size and colour were determined on 50 trees each of sweet cherry (Prunus avium L.) and red oak(Quercus rubra L.), transplanted to two Swedish sites three seasons before the study. In addition, shoot length was measured, and crown density, crownshape and die-back were estimated. Visual establishment assessments were performed by professional evaluators, who also completed a questionnaire on their background knowledge and priorities during assessments. The study investigated which of these leaf and crown characteristics had the greatest impact on the assessments. In addition, it compared the characteristics and evaluator assessments against the tree water status, determined by pre-dawn shoot water potential measurements. Visual assessments proved to be unrelated to shoot water potential for both species but, for red oak the assessments were strongly related to leaf colour and leaf shape. Shootwater potential was related to leaf size but not to leaf colour, indicating that one of the most influential parameters for visual assessments of red oak were not well-suited for determining tree establishment success, if defined by water status. The assessments for sweet cherry were best explained by leaf area. Our findings suggest that leaf size is a good indicator of tree establishment and that leaf shape, the character considered least important by tree evaluators, is influential on tree assessments. These findings are important for the development of more accurate tree expert assessments.
|
|
| 48. |
|
|
| 49. |
|
|
| 50. |
|
|
