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  • 1.
    Allard, Anna
    et al.
    Institutionen för Skoglig Resurshushållning .
    Skånes, Helle
    Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology (INK).
    Miljöövervakning via infraröda flygbilder, ett väl använt verktyg med goda framtidsutsikter i Sverige2010In: Kart- och bildteknik (Mapping and Image Science), Vol. 4, 20-23 p.Article in journal (Other (popular science, discussion, etc.))
  • 2.
    Axelsson, Roger
    Stockholm University, Faculty of Humanities, Department of History.
    Det medeltida Sverige: 4, Småland. 5, Tjust2008Book (Other (popular science, discussion, etc.))
  • 3. Björkman, Maria
    et al.
    Hambäck, Peter
    Stockholm University, Faculty of Science, Department of Botany. Växtekologi.
    Rämert, Birgitta
    Neighboring monocultures enhance the effect of intercropping in turnip root flies (Delia floralis).2007In: Entomologia Experimentalis et Applicata, Vol. 124, 319-326 p.Article in journal (Refereed)
    Abstract [en]

    Knowledge of insect behaviour is essential for accurately interpreting studies of diversification and to develop diversified agroecosystems that have a reliable pest-suppressive effect. In this study, we investigated the egg-laying behaviour of the turnip root fly, Delia floralis (Fall.) (Diptera: Anthomyiidae), in an intercrop-monoculture system. We examined both the main effect of intercropping and the effect on oviposition in the border zone between a cabbage monoculture [Brassica oleracea L. var. capitata (Brassicaceae)] and a cabbage-red clover intercropping system [Trifolium pratense L. (Fabaceae)]. To investigate the border-effect, oviposition was measured along a transect from the border between the treatments to the centre of experimental plots. Intercropping reduced the total egg-laying of D. floralis with 42% in 2003 and 55% in 2004. In 2004, it was also found that the spatial distribution of eggs within the experimental plots was affected by distance from the adjoining treatment. The difference in egg-laying between monoculture and intercropping was most pronounced close to the border, where egg-laying was 68% lower on intercropped plants. This difference in egg numbers decreased gradually up to a distance of 3.5 m from the border, where intercropped plants had 43% fewer eggs than the corresponding monocultured plants. The reason behind this oviposition pattern is most likely that flies in intercropped plots have a higher probability of entering the monoculture if they are close to the border than if they are in the centre of a plot. When entering the monoculture, flies can pursue their egg-laying behaviour without being disrupted by the clover. As the final decision to land is visually stimulated, flies could also be attracted to fly from the intercropped plots into the monoculture, where host plants are more visually apparent. Visual cues could also hinder flies in a monoculture from entering an intercropped plot. Other possible patterns of insect attack due to differences in insect behaviour are discussed, as well as the practical application of the results of this study.

  • 4.
    Brown, Ian
    Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology (INK).
    Polarimetric scattering from shallow firn and forests with snow cover2010In: Proceedings of the ESA Living Planet SymposiumBergen, Norway: (ESA SP-686, December 2010) / [ed] H. Lacoste-Francis, Noordwijk, Netherlands: European Space Agency , 2010Conference paper (Other academic)
    Abstract [en]

    In this paper the potential for inferring shallow firn depth from polarimetric SAR (PolSAR) data at L- and C-band is investigated. Using ALOS PALSAR and Radarsat-2 SAR imagery, and field data including Ground Penetrating Radar profiles and shallow cores, we investigate the spatial distribution of backscatter and decompose backscatter using polarimetric methods to analyse how polarimetric scattering is affected by firn depth near the firn line. The investigation is aimed at a more refined delineation of glacier firn lines and a better understanding of scattering from firn, superimposed ice and the bare ice facies. We found that PolSAR can be used to infer shallow firn thicknesses up to depths of at least 2 m water equivalent (m w.e.) and that old and contemporary firn surfaces can be differentiated using PolSAR. Contrary to many previous investigations the importance of surface scattering in the firn area is also emphasised in the scattering decompositions. Volume scattering was found to have a secondary or tertiary importance. This has important implications for the analysis of backscatter using semi-empirical models.The effect of snow depth on backscatter in pro-glacial a sub-Arctic forest and its potential for improving forest mapping is also discussed. Snow depth data were acquired by manual probing and snowpit measurements. In addition forest stand densities were assessed in situ and NDVI and tasseled cap transformations were made in optical remote sensing data (SPOT-4) to parameterise the forest. Scatterer decomposition and pedestal height products were found to be related to snowpack depth. It was not possible to separate the influences of snow cover and forest structure due to the partial dependence of the former on the latter. Nevertheless it can be concluded that PolSAR improves our ability to map the forest margins of low density, sub-Arctic forests. Our findings have implications for the implementation of algorithms for the exploitation of future SAR missions including Sentinel-1.

  • 5.
    Caretta, Martina Angela
    Stockholm University, Faculty of Social Sciences, Department of Human Geography.
    Managing variability and scarcity. An analysis of Engaruka: A Maasai smallholder irrigation farming community2015In: Agricultural Water Management, ISSN 0378-3774, E-ISSN 1873-2283, Vol. 159, 318-330 p.Article in journal (Refereed)
    Abstract [en]

    This article examines the common-pool regime of Engaruka, a smallholder irrigation farming community in northern Tanzania. Irrigation is a complex issue due to water asymmetry. Water use is regulated in Engaruka through boundary, allocation, input and penalty rules by a users’ association that controls and negotiates water allocation to avoid conflicts among headenders and tailenders. As different crops – maize and beans, bananas and vegetables – are cultivated, different watering schemes are applied depending on the water requirements of every single crop. Farmers benefit from different irrigation schedules and from different soil characteristics through having their plots both downstream and upstream. In fact, depending on water supply, cultivation is resourcefully extended and retracted. Engaruka is an ethnically homogeneous and interdependent community where headenders and tailenders are often the same people and are hence inhibited to carry out unilateral action. Drawing on common-pool resource literature, this study argues that in a context of population pressure alongside limited and fluctuating water availability, non-equilibrium behavior, consisting in negotiating water rights and modifying irrigation area continuously through demand management, is crucial for the satisfaction of basic and productive needs and for the avoidance of water conflicts.

  • 6.
    Celorio-Mancera, Maria de la Paz
    et al.
    Max Planck Society.
    Heckel, David G.
    Vogel, Heiko
    Transcriptional analysis of physiological pathways in a generalist herbivore: responses to different host plants and plant structures by the cotton bollworm, Helicoverpa armigera2012In: Entomologia Experimentalis et Applicata, ISSN 0013-8703, E-ISSN 1570-7458, Vol. 144, no 1, 123-133 p.Article in journal (Refereed)
    Abstract [en]

    The generalist cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), can consume host plants in more than 40 families, and often utilizes several tissues of a single plant. It is believed that generalists owe their success to the deployment of various members of multigene families of detoxification and digestive enzymes, a strategy that may also be responsible for rapid evolution of insecticide resistance. However, studies of generalist adaptations have been limited to specific genes or gene families, and an overview of how these adaptations are orchestrated at the transcriptional level is lacking. We used Drosophila melanogaster Meigen gene homology to H. armigera-expressed sequence tags to identify key groups of genes and pathways differentially regulated in the gut of fifth instars after 2 days of feeding on a variety of food sources. A series of microarray hybridizations was performed following two alternating loop designs, one comparing the gut gene expression upon feeding on various hosts (cotton, bean, tobacco, and chickpea) and two artificial diets (pinto bean and wheat germ-based), whereas the second design compared the gut expression toward feeding on various plant structures within cotton (leaf, square, and boll). The transcriptional responses toward bean and tobacco feeding treatments were more closely related in comparison with the rest of the diets, whereas the gene expression profiles toward cotton leaf and square-feeding were highly similar. We furthermore found significant changes in several pathways not directly responsible for detoxification mechanisms. Genes involved in primary and secondary metabolism, environmental information processing, and cellular processes were found to be differentially expressed. In addition, regulation of xenobiotic metabolism and the extracellular matrix-receptor pathways appeared differentially regulated across feeding treatments. Three cytochrome P450 genes – CYP6AE17, CYP6B6, and CYP9A17 – grouped as part of a xenobiotic metabolism pathway, were up-regulated in the bean-feeding treatment, and down-regulated in both tobacco and cotton-feeding treatments. CYP4L11, CYP4L5, and CYP4S13 were differentially expressed upon feeding on different cotton plant structures. The present work provides host plant and plant structure-specific transcriptional responses in a lepidopteran herbivore, including pathways and gene candidates for future studies of H. armigera physiology under a more integrative ecologically meaningful framework.

  • 7.
    Charpentier Ljungqvist, Fredrik
    Stockholm University, Faculty of Humanities, Department of History. Stockholm University, Faculty of Humanities, Centre for Medieval Studies.
    1600-talet – det kallaste århundradet2011In: Sveriges historia : 1600–1721 / [ed] Nils Erik Villstrand, Stockholm: Norstedts , 2011, 441-445 p.Chapter in book (Other (popular science, discussion, etc.))
  • 8.
    Charpentier Ljungqvist, Fredrik
    Stockholm University, Faculty of Humanities, Department of History.
    Global nedkylning: klimatet och människan under 10 000 år2009Book (Other (popular science, discussion, etc.))
    Abstract [sv]

    Klimatet har förändrats både regionalt och globalt sedan senaste istiden tog slut, ofta med dramatiska konsekvenser för naturen och människan. Fastän det talas så mycket om klimatförändringar idag är det få som vet särskilt mycket om hur klimatet har varierat förr.

    Det är först under de senaste åren som forskningen börjat kunna beskriva vad som faktiskt hänt med klimatet under olika tider, på olika platser. Historikern Fredrik Charpentier Ljungqvist har tagit ett samlat grepp på den senaste forskningen och resultatet är en resa i vått och torrt, i hetta och kyla, jorden runt under 10 000 år. Vi får stifta bekantskap med många olika folk och kulturer – babylonier, romare, mayaindianer och vikingar – som alla under historiens gång varit utsatta för klimatförändringar.

  • 9.
    Charpentier Ljungqvist, Fredrik
    Stockholm University, Faculty of Humanities, Department of History. Stockholm University, Faculty of Humanities, Centre for Medieval Studies.
    Klimatkris på medeltiden2009In: Populär Historia, ISSN 1102-0822, no 12, 48-52 p.Article in journal (Other (popular science, discussion, etc.))
  • 10.
    Cullhed, Anders
    Stockholm University, Faculty of Humanities, Department of History of Literature and History of Ideas, History of Literature.
    The Garden against History: Reflections on the Hortus Conclusus Theme in Premodern Literature2010In: Bulletin för trädgårdshistorisk forskning, ISSN 1652-2362, no 23, 6-8 p.Article in journal (Other academic)
  • 11. Dahlström, Anna
    et al.
    Cousins, Sara A. O.
    Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
    Eriksson, Ove
    Stockholm University, Faculty of Science, Department of Botany.
    The History (1620-2003) of Land Use, People and Livestock, and the Relationship to Present Plant Species Diversity in a Rural Landscape in Sweden2006In: Environment and History, ISSN 0967-3407, E-ISSN 1752-7023, Vol. 12, 191-212 p.Article in journal (Refereed)
    Abstract [en]

    The traditional agriculture in Europe favoured numerous plant and animal species that are presently declining. Integrated studies based on various sources are needed in order to unravel the complex relationships between changing landscapes and biological diversity. The objectives of this study were to describe changes in land use during c. 350 years in a Swedish agricultural landscape in relation to changes in human population and livestock, and to analyse relationships between historical land use and present-day plant species diversity. There were only minor long-term changes in land use, population and livestock between 1640 and 1854 in the two studied hamlets, but detailed data 1620-41 showed a large short-term fluctuation in livestock numbers. After 1854 larger changes took place. Grasslands were cultivated and livestock composition changed. After 1932, livestock number decreased and most of the former grazed outland (areas located outside the fenced infields) turned into forest by natural succession. 7 per cent of the study area is still grazed semi-natural grassland. The highest plant species richness is today found on semi-natural grassland with a long continuity of grazing. The distribution of five target species suggests that previous land use still has an important effect today. The majority of their occurrences are remnant populations located in previous outland pastures which are today forests.

  • 12. de Fraiture, Charlotte
    et al.
    Wichelns, Dennis
    Rockström, Johan
    Stockholm University, Stockholm Resilience Centre, Stockholm Environment Institute.
    Kemp-Benedict, Eric
    Eriyagama, Nishadi
    Gordon, Line J.
    Stockholm University, Stockholm Resilience Centre, Stockholm Environment Institute.
    Hanjra, Munir A.
    Hoogeveen, Jippe
    Huber-Lee, Annette
    Karlberg, Louise
    Stockholm University, Stockholm Resilience Centre, Stockholm Environment Institute.
    Looking ahead to 2050: scenarios of alternative investment approaches2007In: Water for Food, Water for Life: A Comprehensive Assessment of Water Management in Agriculture / [ed] David Molden, London: Earthscan , 2007, 91-145 p.Chapter in book (Refereed)
  • 13.
    Edvinsson, Rodney
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Harvests and grain prices in Sweden 1665-18702012In: Agricultural History Review, ISSN 0002-1490, Vol. 60, 1-18 p.Article in journal (Refereed)
    Abstract [en]

    This paper investigates the impact of harvests and international markets on Swedish grain prices, 1665-1870. The paper finds that harvests at a national level had a greater impact on domestic grain prices than international grain prices. However, at a regional level, grain prices tended to be affected more by harvests outside the region. Furthermore, in the long term, foreign prices became a more important determinant of national grain prices. The conclusion is that, under certain circumstances, grain prices can be used as an indicator of harvest fluctuations and to construct historical national accounts, at least at a sufficiently aggregated level. Such an endeavour needs to be combined with a careful analysis of the impact of prices in the surrounding area.

  • 14.
    Enfors, Elin
    et al.
    Stockholm University, Faculty of Science, Department of Systems Ecology. Stockholm University, Stockholm Resilience Centre.
    Barron, Jennie
    Stockholm University, Stockholm Resilience Centre, Stockholm Environment Institute.
    Makurira, Hodson
    University of Zimbabwe.
    Rockström, Johan
    Stockholm University, Stockholm Resilience Centre, Stockholm Environment Institute.
    Tumbo, Siza
    Sokoine University of Agriuclture.
    Yield and soil system changes from conservation tillage in dryland farming: A case study from North Eastern Tanzania2011In: Agricultural Water Management, ISSN 0378-3774, E-ISSN 1873-2283, Vol. 98, no 11, 1687-1695 p.Article in journal (Refereed)
    Abstract [en]

    Yield levels in smallholder farming systems in semi-arid sub-Saharan Africa are generally low. Water shortage in the root zone during critical crop development stages is a fundamental constraining factor. While there is ample evidence to show that conservation tillage can promote soil health, it has recently been suggested that the main benefit in semi-arid farming systems may in fact be an in situ water harvesting effect. In this paper we present the result from an on-farm conservation tillage experiment (combining ripping with mulch and manure application) that was carried out in northeastern Tanzania from 2005 to 2008, testing this hypothesis. Special attention was given to the effects on the water retention properties of the soil. The tested conservation treatment only had a clear yield increasing effect during one of the six experimental seasons (maize grain yields increased by 41%, and biomass by 65%), and this was a season that received exceptional amounts of rainfall (549 mm). While the other seasons provided mixed results, there seemed to be an increasing yield gap between the conservation tillage treatment and the control towards the end of the experiment. Regarding soil system changes, small but significant effects on chemical and microbiological properties, but not on physical properties, were observed. This raises questions about the suggested water harvesting effect and its potential to contribute to stabilized yield levels under semi-arid conditions. We conclude that, at least in a shorter time perspective, the tested type of conservation tillage seems to boost productivity during already good seasons, rather than stabilize harvests during poor rainfall seasons. Highlighting the challenges involved in upgrading these farming systems, we discuss the potential contribution of conservation tillage towards improved water availability in the crop root zone in a longer-term perspective.

  • 15.
    Green, Erik
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    A Lasting Story: Conservation and Agricultural Extension Services in Colonial Malawi2009In: Journal of African History, ISSN 0021-8537, E-ISSN 1469-5138, Vol. 50, no 2, 1-21 p.Article in journal (Refereed)
    Abstract [en]

    Historians have written extensively about agricultural extension services and the linkages between colonial administrations and rural communities in British Africa. Most studies argue that it is possible to identify a qualitative shift between inter- and post-war strategies. The former is characterised by modest attempts of promoting soil conservation, while the latter is described as a period when colonial governments in British Africa - guided by scientific knowledge - tried to transform peasant agriculture to increase production. The article questions this division by using colonial Malawi as a case. It reveals that the strategies and intensity of agricultural extension services changed over time but that the aim of intervention, i.e. to combat soil erosion remained the focal point throughout the colonial period. This shows that it is important to differ between strategies and scale of intervention on the one hand and their aims and contents on the other. Changes of the former took place within the conservation paradigm. Additionally, the article reveals that agricultural extension services were directed by colonial officials' perception about African farmers rather than detailed empirical knowledge about existing farming methods.

  • 16.
    Green, Erik
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Diversification or De-Agrarianization?: Income Diversification, Labor, and Processes of Agrarian Change in Southern and Northern Malawi, Mid-1930s to Mid-1950s2008In: Agricultural History, Vol. 82, no 2Article in journal (Refereed)
    Abstract [en]

    This article investigates the links between market-oriented activities and subsistence production among peasant farmers in the Thyolo and Mzimba districts in Malawi, from the mid-1930s to the mid-1950s. The two districts were chosen because of their differences in terms of land-labor ratios, quality of soils, and structure of market engagement. Exploring the different paths of agrarian change in these two districts demonstrates that they were dependent on the structure of market engagement and its effects on the supply and flexibility of labor. African agricultural history is best understood when agricultural systems are viewed in connection to the overall economic activities of rural households. More simply put, the dynamics of agrarian change in rural Africa cannot be understood without linking such changes to the wider economy and their impact on local labor processes.

  • 17.
    Green, Erik
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Forces of Agrarian Change: Agricultural Commercialisation in Mzimba District in Northern Malawi, mid-1950s to late 1970s2008In: Malawi Journal of Social Sciences, ISSN 1028-298X, Vol. 20, 1-25 p.Article in journal (Refereed)
    Abstract [en]

    Between the mid-1950s and late-1970s an increasing number of farmers in Mzimba district in Malawi engaged in commercial agriculture. This article investigates why they reallocated labour from migrant work to commercial agricultural production. By use of archival sources, it traces the changes to political factors that limited the households’ ability to participate in the regional labour market, which forced them to find alternative sources of income. Increased commercial production was thus driven by push-factors. Rather than been a force of change, the processes of commercialisation was limited by existing farming systems, characterized by shortage of labour and its low levels of productivity.

  • 18.
    Gräslund Berg, Elisabeth
    Stockholm University, Faculty of Social Sciences, Department of Human Geography.
    Historisk landskapsanalys E18 Lekhyttan-Örebro2006Report (Other (popular science, discussion, etc.))
  • 19.
    Holmlund, Sofia
    Stockholm University, Faculty of Humanities, Department of History.
    Arvejord och äktenskap på den uppländska landsbygden under 1800-talet2003In: Hans och hennes: genus och egendom i Sverige från vikingatid till nutid / [ed] Maria Ågren, Uppsala: Historiska institutionen, Uppsala universitet , 2003, 241-266 p.Chapter in book (Other academic)
  • 20.
    Holmlund, Sofia
    Stockholm University, Faculty of Humanities, Department of History.
    Jord byter ägare: Jordöverföringar och social differentiering i Stora Tuna ca 1840-18201995In: Bebyggelsehistorisk tidskrift, ISSN 0349-2834, Vol. 30, 45-64 p.Article in journal (Other academic)
  • 21.
    Holmlund, Sofia
    Stockholm University, Faculty of Humanities, Department of History.
    Jorden vi ärvde: Ägostruktur och arvsstrategier i Estuna 1800-19302004In: Bebyggelsehistorisk tidskrift, ISSN 0349-2834, no 46, 81-96 p.Article in journal (Refereed)
  • 22.
    Israelsson, Carin
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Djuröga, guld värt; Dagar präglade av kor; Utfodring för överlevnad: Människan och faunan2008In: Etnobiologi i Sverige, no 3Article in journal (Other academic)
  • 23.
    Israelsson, Carin
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Milk as a means of payment for farm labour: the dairy economy at a Swedish estate 1874-19132008In: Agricultural History Review, ISSN 0002-1490, no 2Article in journal (Other academic)
  • 24.
    Israelsson, Carin
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Swedish success story: supported by the small people2007In: Exploring the Food Chain: Food Production and Food Procesing in Western Europe 1850-1980, Brepol publishers , 2007Chapter in book (Other academic)
  • 25.
    Larsson, Inger
    Stockholm University, Faculty of Humanities, Department of Scandinavian Languages. Stockholm University, Faculty of Humanities, Centre for Medieval Studies.
    Örta- och läkeböcker i den Bröndegaardska boksamlingen2010In: Nycklar till kunskap: Om människans bruk av naturen / [ed] Håkan Tunón och Anna Dahlström, Stockholm, Uppsala: CBM, KSLA , 2010, 137-149 p.Chapter in book (Other academic)
  • 26.
    Lilja, Sven
    Stockholm University, Faculty of Humanities, Department of History.
    Appendix - Projektbeskrivning: förmoderna kustmiljöer. Naturresurser, klimat och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt2006In: Människan anpassaren - människan överskridaren: natur, bebyggelse och resursutnyttjande från sen järnålder till 1700-tal med särskild hänsyn till östra Mellansverige och Södermanlands kust : rapport från projektet: Förmoderna kustmiljöer. Naturresurser, klimat och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt / [ed] Sven Lilja, Huddinge: Södertörns högskola , 2006, 231-241 p.Chapter in book (Other academic)
    Abstract [sv]

    Projektet Förmoderna kustmiljöer. Natur, klimat och samhälle vid Östersjökusten före ca 1800 är en komparativ miljöhistorisk studie av lokalt resursutnyttjande och miljöpåverkan under förmodern tid (järnålder till tidigt 1800-tal). Projektets övergripande tema ”människoskapade miljöförändringarkontra naturprocesser” undersöks genom intensivstudier av några lokalakustsamhällens elasticitet och överlevnadsförmåga. Såväl långsiktiga somkortsiktiga förändringar studeras. Hur anpassade sig sådana samhällen tilllångsamma naturprocesser, och vilka strategier valdes för att hantera kortarehistoriska fluktuationer och förändringsförlopp? Vilka konsekvenser fick devalda anpassningsstrategierna för närmiljön? Projektet syftar till ett disciplinöverskridande samarbete mellan arkeologi, historia och geografi. Delprojekten behandlar kompletterande perspektiv, där yttre naturförhållanden(landhöjning, klimatförändringar och växlingar i den marinbiologiska faunanetc.), samt yttre samhällsförhållanden (närhet till stat och marknad) ställsmot lokalsamhällets inre anpassnings- och förändringsstrategier. Undersökningen är komparativ, med undersökningsområden i lokala kust- och skärgårdsmiljöer vid Östersjön. I första hand kommer Stockholms södra skärgård och Estlands kust, med Saaremaa (Ösel) och Hiumaa (Dagö), att studeras, men även områden i Finland och västra Ryssland.

  • 27.
    Lilja, Sven
    Stockholm University, Faculty of Humanities, Department of History.
    Klimatet, döden och makten: 1690-talets klimatkris2008In: Leva vid Östersjöns kust: en antologi om naturförutsättningar och resursutnyttjande på båda sidor av Östersjön ca 800-1800 : rapport 2 / från projektet Förmoderna kustmiljöer, naturresurser, klimat, och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt / [ed] Sven lilja, Huddinge: Södertörns högskola , 2008, 23-79 p.Chapter in book (Other (popular science, discussion, etc.))
    Abstract [sv]

    Artikeln beskriver och analyserar den stora klimatkris som drabbade norra Sverige, Finland och Baltikum på 1690-talet. Den studerar de demografiska och ekonomiska aspekterna av krisen, med särskild hänsyn till mortalitet, skördeutfall och och klimat- och vädersituationen. Artikeln diskutera även kronans sätt att reagera på krissignalerna från agrarsamhället.

  • 28.
    Lilja, Sven
    Stockholm University, Faculty of Humanities, Department of History.
    Människan anpassaren - människan överskridaren: natur, bebyggelse och resursutnyttjande från sen järnålder till 1700-tal med särskild hänsyn till östra Mellansverige och Södermanlands kust : rapport från projektet: Förmoderna kustmiljöer. Naturresurser, klimat och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt.2006Collection (editor) (Other (popular science, discussion, etc.))
    Abstract [sv]

    Projektet "Förmoderna kustmiljöer" handlar om samspelet mellan kustmiljöernas förändring och människors liv huvudsakligen under de senaste 1500 åren. Projektet ställer naturprocesser mot samhälleliga förändringar i ett försök att förstå samspelet mellan människa och miljö. Kustens resurser bildar en fond mot vilken vi försöker förstå människornas verksamheter, strategier och tänkande. Naturens utmaning möter människors kamp och anpassning, och i den processen skapas landskap och miljöer. Förändringarna är ofta smygande, nästan omärkligt gradvisa, men ibland också kortsiktiga, tillfälliga och dramatiska. Projektet strävar efter att belysa utvecklingen ur båda dessa tidsperspektiv, i ett försök att se historiens riktning, upptäcka brytpunkter och eventuella "systemskiften".

  • 29.
    Lilja, Sven
    Stockholm University, Faculty of Humanities, Department of History.
    Pre-modern coastal environments - project description2008In: Leva vid Östersjöns kust: en antologi om naturförutsättningar och resursutnyttjande på båda sidor av Östersjön ca 800-1800 : rapport 2 / från projektet Förmoderna kustmiljöer, naturresurser, klimat, och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt / [ed] Sven Lilja, Huddinge: Södertörns högskola , 2008, 319-329 p.Chapter in book (Other academic)
    Abstract [en]

    The project Pre-Modern Coastal Environments has as its objective the studyof local resource use in selected coastal regions along the Baltic Sea. Thestudy’s main purpose is to determine the correlation between the effects ofhuman activities on the environment and the effects of naturally occurringenvironmental change. This will be achieved by using case studies focussingon the elasticity and survival capacity of specific coastal societies in easternSweden and western Estonia. The project will study settlement patterns,trade and industry, in relation to changes in the physical environment in thecontext of offshore displacement, climate changes, and changes in marinebiota. The project is a multidisciplinary cooperative effort of six researcherswho represent the disciplines of history, archaeology, human geography andphysical geography.

  • 30.
    Lilja, Sven
    Stockholm University, Faculty of Humanities, Department of History.
    Skärgården och stormaktstidens Stockholm - impulser från en växande stad2009In: Skärgård och örlog.: Nedslag i Stockholms skärgårds tidiga historia. / [ed] Katarina Schoerner, Stockholm: Kungl. Vitterhets Historie och Antikvitets Akademien. , 2009, första, 41-72 p.Chapter in book (Other academic)
    Abstract [sv]

    Artikeln handlar om Stockholms inflytande på skärgården under stadens tillväxtperiod på 1600-talet. Den analyserar relationen mellan staden och skärgården ur tre parspektiv: stadens tryck mot skärgården, möjlilgheterna som skapades genom staden och stadens allmänna relationer till skärgården.

  • 31.
    Lilja, Sven
    Stockholm University, Faculty of Humanities, Department of History.
    Teoretisk epilog2006In: Människan anpassaren - människan överskridaren: natur, bebyggelse och resursutnyttjande från sen järnålder till 1700-tal med särskild hänsyn till östra Mellansverige och Södermanlands kust : rapport från projektet: Förmoderna kustmiljöer. Naturresurser, klimat och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt / [ed] Sven Lilja, Huddinge: Södertörns högskola , 2006, 197-220 p.Chapter in book (Other (popular science, discussion, etc.))
  • 32.
    Lilja, Sven
    Stockholm University, Faculty of Humanities, Department of History.
    Teoretisk epilog2008In: Leva vid Östersjöns kust: en antologi om naturförutsättningar och resursutnyttjande på båda sidor av Östersjön ca 800-1800 : rapport 2 / från projektet Förmoderna kustmiljöer, naturresurser, klimat, och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt / [ed] Sven Lilja, Huddinge: Södertörns högskola , 2008, 265-276 p.Chapter in book (Other academic)
    Abstract [sv]

    Arftikeln är en teoretiskt orienterad sammanfatande analys av publikationens bidrag. Den anknyter till projektets övergriande målsättningar, och strävar efter att sätta antologins hvuudresultat i det större projektsammanhanget.

  • 33.
    Liljewall, Britt
    et al.
    Göteborgs stadsmuseum.
    Flygare, Iréne A.Lange, UlrichInstitutionen för kulturvård vid Göteborgs universitet.Ljunggren, LarsSöderberg, JohanStockholm University, Faculty of Social Sciences, Department of Economic History.
    Agrarhistoria på många sätt: 28 studier om människan och jorden. Festskrift till Janken Myrdal på hans 60-årsdag2009Collection (editor) (Other academic)
    Abstract [sv]

    Den överväldigande majoriteten av alla människor har varit verksamma i arbetet med jord och skog. Än idag är detta helt nödvändigt för vår överlevnad. Idag ställs även krav på landskapets biologiska och estetiska värden. Allt talar för att vi är i stort behov av agrarhistorisk kunskap. Boken ökar vår kunskap om dess kärna - om jorden, djuren och redskapen - men även de sociala, kulturella och politiska förhållandena som påverkat jordbruket. Bokens alla författare, både svenska och utländska, gör oss medvetna om mängden av agrarhistoriska källor och metoder. denna stora antologi är tillägnad Janken Myrdal, agrarhistoriens främste representant i Sverige, som låtit de mest skiftande och överraskande källmaterial och metoder komma till användning i sitt arbete.

  • 34.
    Manzoni, Stefano
    et al.
    Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology. Swedish University of Agricultural Sciences.
    Schaeffer, S. M.
    Katul, G.
    Porporato, A.
    Schimel, J. P.
    A theoretical analysis of microbial eco-physiological and diffusion limitations to carbon cycling in drying soils2014In: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 73, 69-83 p.Article in journal (Refereed)
    Abstract [en]

    Soil microbes face highly variable moisture conditions that force them to develop adaptations to tolerate or avoid drought. Drought conditions also limit the supply of vital substrates by inhibiting diffusion in dry conditions. How these biological and physical factors affect carbon (C) cycling in soils is addressed here by means of a novel process-based model. The model accounts for different microbial response strategies, including different modes of osmoregulation, drought avoidance through dormancy, and extra-cellular enzyme production. Diffusion limitations induced by low moisture levels for both extracellular enzymes and solutes are also described and coupled to the biological responses. Alternative microbial life-history strategies, each encoded in a set of model parameters, are considered and their effects on C cycling assessed both in the long term (steady state ahalysis) and in the short term (transient analysis during soil drying and rewetting). Drought resistance achieved by active osmoregulation requiring large C investment is not useful in soils where growth in dry conditions is limited by C supply. In contrast, dormancy followed by rapid reactivation upon rewetting seems to be a better strategy in such conditions. Synthesizing more enzymes may also be advantageous because it causes larger accumulation of depolymerized products during dry periods that can be used upon rewetting. Based on key model parameters, a spectrum of life-history strategies thus emerges, providing a possible classification of microbial responses to drought.

  • 35.
    Morell, Mats
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Agriculture in industrial society: 1870-19452011In: The agrarian history of Sweden: from 4000 BC to AD 2000 / [ed] Janken Myrdal, Mats Morell, Lund: Nordic Academic Press , 2011, 165-213 p.Chapter in book (Other academic)
  • 36.
    Morell, Mats
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Böndernas jord: äga eller arrendera, ärva eller köpa2011In: Jordbruk och skogsbruk i Sverige sedan år 1900: studier av de areella näringarnas geografi och histoira / [ed] Hans Antonsson, Ulf Jansson, Stockholm: Kungliga Skogs- och Lantbruksakademien , 2011, 53-69- p.Chapter in book (Other academic)
  • 37.
    Morell, Mats
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Husdjur och animalisk produktion2011In: Jordbruk och skogsbruk i Sverige sedan år 1900: en kartografisk beskrivining / [ed] Ulf Jansson, Stockholm: Nordstedts , 2011, 86-95 p.Chapter in book (Other academic)
  • 38.
    Morell, Mats
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Jordbrukets ekonomi och politik2011In: Jordbruk och skogsbruk i Sverige sedan år 1900: en kartografisk beskrivning / [ed] Ulf Jansson, Stockholm: Nordstedt , 2011, 40-44 p.Chapter in book (Other academic)
  • 39.
    Morell, Mats
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Produktionen på åker och i trädgård2011In: Jordbruk och skogsbruk i Sverige sedan år 1900: en kartografisk beskrivning / [ed] Ulf Jansson, Stockholm: Nordstedt , 2011, 70-85 p.Chapter in book (Other academic)
  • 40.
    Morell, Mats
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Teknikutvecklingen i jordbruket2011In: Jordbruk och skogsbruk i Sverige sedan år 1900: en kartografisk beskrivning / [ed] Ulf Jansson, Stockholm: Nordstedts , 2011, 45-55 p.Chapter in book (Other academic)
  • 41.
    Morell, Mats
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Economic History.
    Gadd, Carl-Johan
    Ekonomisk-historiska institutionen, Göteborgs universitet.
    Myrdal, Janken
    Institutionen för Ekonomi, Sveriges Lantbruksuniversitet.
    Statistical appendix2011In: The agrarian history of Sweden: from 4000 BC to AD 2000 / [ed] Janken Myrdal och Mats Morell, Lund: Nordic Academic Press , 2011, 257-270 p.Chapter in book (Other academic)
  • 42.
    Nguyen, Thanh Tam
    et al.
    Stockholm University, Faculty of Science, Department of Physical Geography. Nong Lam University, Vietnam.
    Berg, Håkan
    Stockholm University, Faculty of Science, Department of Physical Geography.
    Nguyen, Hang Thi Thuy
    Van Nguyen, Cong
    Effects of chlorpyrifos ethyl on acetylcholinesterase activity in climbing perch cultured in rice fields in the Mekong Delta, Vietnam2015In: Ecotoxicology and Environmental Safety, ISSN 0147-6513, E-ISSN 1090-2414, Vol. 117, 34-40 p.Article in journal (Refereed)
    Abstract [en]

    Climbing perch is commonly harvested in rice fields and associated wetlands in the Mekong Delta. Despite its importance in providing food and income to local households, there is little information how this fish species is affected by the high use of pesticides in rice farming. Organophosphate insecticides, such as chlorpyrifos ethyl, which are highly toxic to aquatic organisms, are commonly used in the Mekong Delta. This study shows that the brain acetylcholinesterase (AChE) activity in climbing perch fingerlings cultured in rice fields, was significantly inhibited by a single application of chlorpyrifos ethyl, at doses commonly applied by rice farmers (032-0.64 kg/ha). The water concentration of chlorpyrifos ethyl decreased below the detection level within 3 days, but the inhibition of brain AChE activity remained for more than 12 days. In addition, the chlorpyrifos ethyl treatments had a significant impact on the survival and growth rates of climbing perch fingerlings, which were proportional to the exposure levels. The results indicate that the high use of pesticides among rice farmers in the Mekong Delta could have a negative impact on aquatic organisms and fish yields, with implications for the aquatic biodiversity, local people's livelihoods and the aquaculture industry in the Mekong Delta.

  • 43.
    Nilsson, Mats
    et al.
    Fjärranalys, SLU Umeå.
    Granholm, Ann-Helen
    Fjärranalys, SLU Umeå.
    Nordqvist, Karin
    SLU, Umeå.
    Skånes, Helle
    Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology (INK).
    Computer classification of General Habitat Categories by combining LiDAR and SPOT data2010Conference paper (Other academic)
    Abstract [en]

    General Habitat Categories (GHC) is a classification scheme developed in BioHab1, 2 and a central concept in EBONE3. A characteristic of GHC is plant height, which can be derived using Light Detection And Ranging (LiDAR) data. Computer classification of GHCs might be improved by combining spectral information in optical satellite data with LiDAR. The aim of this pilot study was to investi­gate to which degree airborne LiDAR improves SPOT data based classification of a selection of GHCs in a for­est area in southern Sweden. Lat. 58° 30’ N Long 13° 40’ E. Managed forest with Scots pine (Pinus Sylvestris), Norway spruce (Picea Abies) and birch (Betula spp). A SPOT 5 HRG XS scene. Airborne LiDAR data with an average point density of 26 returns/m2. Photo interpretation of GHCs, 585 sample plots, in aerial DMC images. Combining LiDAR and SPOT data shows promise, considering the restrictions to this study. In a similar study, using the same dataset for classifying CORINE land cover types, overall accuracy increased from 67.1% to 77.6% when add­ing LiDAR data4. This means that there is potential, though the methods need improvement and further tests should include a larger test area providing adequate amounts of sample plots per GHC.

  • 44.
    Nilsson, Mats
    et al.
    Fjärranalys, SLU Umeå.
    Holm, Sören
    Fjärranalys, SLU Umeå.
    Allard, Anna
    Institutionen för Skoglig Resurshushållning .
    Skånes, Helle
    Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology (INK).
    Integration of earth observation data and in situ data from the National Inventory of Landscapes in Sweden (NILS)2010Conference paper (Other academic)
    Abstract [en]

    Integration of in situ data and earth observation (EO) data for estimating the occurrence of different habitat or classes can be achieved using different approaches. In this study, the approach used is to post-stratify in situ data using existing land cover maps derived from satellite data. Photo-interpreted landscape elements and biotopes from the National Inventory of Landscapes in Sweden (NILS; http://nils.slu.se/) were used as in situ data. The mapped landscape elements and biotopes were classified into General Habitat Categories (GHCs). Five of the GHCs were selected to exemplify how the precision of their area estimates was affected by using post-stratification, as compared to area estimates of the GHCs based on the photo-interpreted data alone. The stratification was made using the Swedish version of Corine land cover (SMD) which includes more classes and has a higher spatial resolution (1-25 ha minimum mapping unit depending on the class) than the European version of Corine land cover (CLC). The results show that the standard error was reduced substantially for all tested GHCs using post-stratification in comparison to the errors obtained without post-stratification. This shows the potential to derive improved area statistics of habitat categories by integrating in situ data with existing land cover maps.

  • 45. Petersson, Erik V.
    et al.
    Arif, Usman
    Schulzova, Vera
    Krtkova, Veronika
    Hajslova, Jana
    Meijer, Johan
    Andersson, Hans Christer
    Jonsson, Lisbeth
    Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.
    Sitbon, Folke
    Glycoalkaloid and Calystegine Levels in Table Potato Cultivars Subjected to Wounding, Light, and Heat Treatments2013In: Journal of Agricultural and Food Chemistry, ISSN 0021-8561, E-ISSN 1520-5118, Vol. 61, no 24, 5893-5902 p.Article in journal (Refereed)
    Abstract [en]

    Potato tubers naturally contain a number of defense substances, some of which are of major concern for food safety. Among these substances are the glycoalkaloids and calystegines. We have here analyzed levels of glycoalkaloids (alpha-chaconine and a-solanine) and calystegines (A(3), B-2, and B-4) in potato tubers subjected to mechanical wounding, light exposure, or elevated temperature: stress treatments that are known or anticipated to induce glycoalkaloid levels. Basal glycoalkaloid levels in tubers varied between potato cultivars. Wounding and light exposure, but not heat, increased tuber glycoalkaloid levels, and the relative response differed among the cultivars. Also, calystegine levels varied between cultivars, with calystegine B-4 showing the most marked variation. However, the total calystegine level was not affected by wounding or light exposure. The results demonstrate a strong variation among potato cultivars with regard to postharvest glycoalkaloid increases, and they suggest that the biosynthesis of glycoalkaloids and calystegines occurs independently of each other.

  • 46.
    Runefelt, Leif
    Stockholm University, Faculty of Humanities, Department of History.
    Inledning2008In: Svensk mosskultur: Odling, torvanvändning och landskapets förändring 1750-2000, 2008, 11-25 p.Chapter in book (Other academic)
  • 47.
    Runefelt, Leif
    Stockholm University, Faculty of Humanities, Department of History.
    Mosskultur i Europa 1870-19452008In: Svensk mosskultur: Odling, torvanvändning och landskapets förändring 1750-2000, k. Skogs- och lantbruksakademien , 2008, 273-304 p.Chapter in book (Other academic)
  • 48.
    Runefelt, Leif
    Stockholm University, Faculty of Humanities, Department of History.
    Svensk mosskultur: odling, torvanvändning och landskapets förändring 1750-20002010Collection (editor) (Other academic)
    Abstract [en]

    This book contains all you ever wanted to know about Swedish moor cultivation. If you're interested in the subject, this is the only possible startingpoint.

  • 49.
    Runefelt, Leif
    Stockholm University, Faculty of Humanities, Department of History.
    Svensk mosskultur som överhetsprojekt före 18862008In: Svensk mosskultur: Odling, torvanvändning och landskapets förändring 1750-2000, 2008, 27-52 p.Chapter in book (Other academic)
  • 50.
    Runefelt, Leif
    Stockholm University, Faculty of Humanities, Department of History.
    Svenska Mosskulturföreningen 1886-19392008In: Svensk mosskultur: Odling, torvanvändning och landskapets förändring 1750-2000, k. Skogs- och lantbruksakademien , 2008, 53-95 p.Chapter in book (Other academic)
12 1 - 50 of 60
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