Beate Strandberg

Beate Strandberg
Aarhus University | AU · Department of Bioscience

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49
Publications
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1,293
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Publications

Publications (49)
Article
Full-text available
As part of the MUST-B project, a research project on field data collection for honey bee colony model evaluation was carried out in 2018-2020. In a preparatory phase (2018), methods for monitoring of honey bee colonies were tested, field operators trained, and experimental colonies established. The main field experiment was conducted in 2019-2020,...
Article
Recent studies have shown that sub-lethal doses of herbicides may affect plant flowering, however, no study has established a direct relationship between the concentrations of deposited herbicide and plant flowering. Here the aim was to investigate the relationship between herbicide spray drift deposited on non-target plants and plant flowering in...
Technical Report
Full-text available
Vilde bestøvende insekter er generelt truede. De vilde bier, dagsommerfugle og svirrefluer, som denne rapport har fokus på, stiller imidlertid forskellige krav til levestedet gennem forskellige dele af livscyklus. I rapporten er levestedskravene eller habitatressourcerne, som de også kaldes, grundigt beskrevet for humlebier, enlige bier, dagsommerf...
Article
Effects of insecticides on terrestrial adult life stages of otherwise aquatic insects, such as mayflies (Ephemeroptera), stoneflies (Plecoptera) and caddisflies (Trichoptera), are largely unknown. In the present study, a risk model was used to pin point the species most likely to experience effects due to spray drift exposure during the adult life...
Article
Herbicide drift may cause adverse effects on natural and semi‐natural plant communities, and it has been debated whether the current ecological risk assessments are adequate to protect non‐target terrestrial plant species (NTTP). In this study, nine NTTPs with different lifespans (three annual/ six perennial) belonging to six different plant famili...
Article
Full-text available
This paper suggest an area model to assess the risk of negative effects on wild bees due to food competition from honeybees. The model includes four factors: (1) the total number of foraging visits by honeybees per day; (2) the foraging range of the honeybees, typically measured as a mean or median value; (3) the area covered by floral resources in...
Article
Many taxonomic groups of freshwater insects have a reproductive terrestrial life stage, and some are highly sensitive to insecticides. In agricultural landscapes, it is likely that streams and rivers often run along agricultural fields treated with pesticides, but the risk to insects with a reproductive terrestrial life stage due to pesticide expos...
Technical Report
Full-text available
Vi har i denne rapport undersøgt baggrunden for at insekter er gået tilbage. Tilbagegangen er tydeligst for sommerfugle, bier og løbebiller. Det er gennemgående, at arter, der enten har en begrænset spredningsevne, er specialister, er tilknyttet næringsfattige habitater eller lever i områder med lav landskabsdiversitet, alle går tilbage. Analyser a...
Article
Herbicides have been shown to reduce flower production and to delay flowering with results varying among herbicides and tested plant species. Here, we investigated the effects of herbicides on flowering in an extensive greenhouse study conducted in Canada and Denmark. The effects of low doses of five different herbicides (bromoxynil, ioxynil + brom...
Article
Terrestrial adult stages of freshwater insects may be exposed to pesticides by wind drift, over-spray, contact or feeding. However, studies addressing insecticide effects on freshwater invertebrates focus primarily on the impact of pesticides reaching the streams and potentially harming the aquatic juvenile stages. This is also reflected in the cur...
Article
Plant competitive interactions influence the effect of herbicides, and the effect of competitive interactions on plant responses may be important to include in the ecological risk assessment of herbicides. Here, the effect of competitive interactions and sub‐lethal doses of two herbicides on plant species was investigated in competition experiments...
Article
Aim The change in the frequencies of invasive higher plant species in different habitat types were investigated using Danish monitoring data from 2004 to 2014 Location Denmark. Methods The occurrence data were collected in circles with a radius of 5 meters at a number of plots within 923 sites. The sampling intensity was irregular with sampling i...
Article
Herbicides and nitrogen fertilizers are widely used in intensively grown agricultural areas. Non-target plants growing in habitats adjacent to conventional fields may be exposed to herbicides by spray drift and misplacement of nitrogen fertilizers. Whereas sub-lethal effects of herbicides have previously been documented, combined effects of nitroge...
Article
Insecticides are important drivers of biodiversity loss and ecological impairment in freshwater ecosystems. Freshwater insects may be exposed to insecticides via water during larval/nymph stages and via air, habitats, and food during adult stages in the terrestrial environment. 2.The aquatic risk assessment (RA) of pesticides does not consider terr...
Chapter
Over the past decades declining biodiversity has been a major concern across the world; however, preventing biodiversity declines in agricultural areas has been ineffective. Failure to adequately assess and properly regulate herbicide effects can have important implications for species richness and overall biodiversity within natural and semi-natur...
Article
Full-text available
The potential contribution of organic farming to the public goods, ‘Nature and Biodiversity’, ‘Environment’, ‘Energy and Climate’, ‘Human Health and Welfare’ and ‘Animal Health and Welfare’ in Denmark is guided and partly secured by the principles and specific requirements of the EU Organic Regulation. However, other factors, such as the production...
Article
Full-text available
L’estimation du recouvrement de la végétation herbacée peut être obtenue en utilisant la méthode de point d'interception. L'échantillonnage des données a lieu dans les points de grilles dans un quadrat. A chaque position, une tige est abaissée verticalement sur le sol et la première interception avec une espèce de plante est enregistrée. Le recouvr...
Article
Full-text available
Soil is a complex ecosystem, and also one of the most important natural systems on the planet, given its fundamental role in biogeochemical cycles, the high richness of biodiversity and the many ecosystem services it provides. Soil fauna, with its multiple levels of specialization and its interactions with above-ground biota and with the mineral so...
Article
Full-text available
Biodiversity within European semi-natural biotopes in agro-ecosystem is declining, and herbicide drift from neighbouring fields is considered as an important factor for the decline. The aim of the present study was to investigate whether the growth and competitive interactions in a model system of two perennial grass species, Festuca ovina and Agro...
Article
Das Ziel dieser Untersuchung ist es, die Reaktion der Bodenflora in Hecken auf die Umstellung von benachbarten Feldern von konventioneller auf biologische Bewirtschaftung zu beschreiben. Der Effekt der Zeit seit Umstellung auf die Vegetation der benachbarten Hecken wurde untersucht, indem die Selektion auf Pflanzenarten und Pflanzenmerkmale gemesse...
Article
Full-text available
Throughout the world, herbicides and fertilizers change species composition in agricultural communities, but how do the cumulative effects of these chemicals impact the functional and phylogenetic structure of non-targeted communities when they drift into adjacent semi-natural habitats? Based on long-term experiment we show that fertilizer and herb...
Article
Full-text available
Declining plant diversity and abundance have been widely reported in agro-ecosystems of North America and Europe. Intensive use of herbicides within cropfields and the associated drift in adjacent habitats are partly responsible for this change. The objectives of this work were to quantify the phenological stages of non-target plants in in-situ fie...
Article
Full-text available
The ecological success of a plant species is typically described by the observed change in plant abundance or cover, but in order to more fully understand the fundamental plant ecological processes, it is necessary to inspect the underlying processes of survival and colonization and how they are affected by environmental conditions. A general ecolo...
Article
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In this paper, we develop a method, termed the Interaction Distribution (ID) method, for analysis of quantitative ecological network data. In many cases, quantitative network data sets are under-sampled, i.e. many interactions are poorly sampled or remain unobserved. Hence, the output of statistical analyses may fail to differentiate between patter...
Article
In order to study the combined effect of nitrogen and glyphosate on biodiversity in agricultural areas, a replicated long-time field experiment with glyphosate and nitrogen treated plots was set-up. The experiment allowed a quantitative estimation of the effect of glyphosate and nitrogen on competitive growth, survival and establishment of the domi...
Article
Full-text available
This paper reviews the knowledge on crowberry (Empetrum nigrum ssp. nigrum and ssp. hermaphroditum) dominated ecosystems in the Nordic region. Empetrum leaves and litter have high phenolic content resulting in slow decomposition, and with the formation of an organic top soil, nutrients are kept in an organic nutrient bank in the soil mainly availab...
Article
Full-text available
We performed manipulative field experiments to investigate the effects of soil disturbance and exposure to a fungal plant pathogen, Puccinia coronata (Corda), on the establishment and spread of two introduced, cultivated genotypes of perennial ryegrass, Lolium perenne (L.). The two cultivars of L. perenne with different levels of susceptibility to...
Article
Full-text available
Vegetation data including plant cover, biomass, species richness, and vegetation height was sampled on a copper-contaminated field with total copper contents varying from 50 to almost 3,000 mg/kg soil. The field was covered by early succession grassland dominated by Agrostis stolonifera. Plant cover, biomass, species richness, and vegetation height...
Article
The aims of this study were to investigate the combined effects of drought stress and copper pollution on enchytraeids under natural conditions in the field and to compare the results of laboratory toxicity tests with results of the field study. Such studies were conducted to increase the understanding of interactions between chemicals and natural...
Article
Active management for preservation of conserved ecosystems is receiving increased attention, as management probably is the most important factor for the temporal and spatial distribution of understorey vegetation, and probably humus forms and soil nutrient cycling as well. The present study investigates this issue on well-drained sandy soils in the...
Article
Full-text available
The introduction of genetically modified herbicide tolerant (GMHT) crops has raised concerns from both scientists and non-governmental organisations about possible effects on arable flora and fauna due to the changes in herbicide application and management that such crops involve. Three consecutive studies were performed, covering flora and fauna i...
Chapter
A number of hypotheses have been posed to describe how non-indigenous plant species can be affected by plant pathogens in their new ranges, but few experimental studies have examined these hypotheses. The present study is the first experimental investigation on the interaction between the invasive plant Heracleum mantegazzianum (Giant Hogweed) and...
Article
It has been 30 years since environmental concern was first expressed over the prospect of large-scale resource development in the Arctic. Human effects are more extensive within the tundra biome now than at any time in the past. With or without predicted climatic changes, interaction among different natural and contemporary anthropogenic disturbanc...
Article
Full-text available
,In this report actual literature concerning allelopathy has been reviewed. The objec- tive of the report has been,to discuss the potential of allelopathy in relation to geneti- cally modification,of crops and on this background,to discuss how,allelopathic crops may,interfere with the environment,through,spread,of GM-plants or transgenes out- side...
Article
Full-text available
In order to evaluate the power of laboratory toxicity tests to predict the situation in the field, soil microarthropods were studied at the population and community levels in a copper contaminated field, and data were compared to the outcome of single species laboratory tests in the same soil type from a companion study. In addition to copper, the...
Article
Historical sources of the use of the forests around the manor Hald during three centuries are used to outline a typical development for many areas on poor sandy soils in Denmark. The balance between forest, shrub, agricultural land, fallow and heathlands in the zone depended on the intensity of land-use for agriculture, grazing and wooden products....
Article
The increasingly high number of applications to release or market transgenic plants calls for an effective and uniform treatment. Regulatory authorities in most countries are evaluating the safety of transgenic plants; however, internationally standardised and consistent schemes, test procedures and concepts have not been fully developed. This pape...
Article
Full-text available
Code Number:BY98002 Sizes of Files: Text: 69.7K Graphics: Line drawing (gif)-22K SUMMARY The increasingly high number of applications to release or market transgenic plants calls for an effective and uniform treatment. Regulatory authorities in most countries are evaluating the safety of transgenic plants; however, internationally standardised and...

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Projects (2)
Archived project
Combating climate change and desertification in West Africa RESULTS IN BRIEF Scientists from the EU and West Africa have worked together to investigate the effects of desertification in West Africa and implemented mitigation measures alongside local people. These measures included restoring the ecosystem through tree plantations for carbon sequestration, sometimes known as carbon forestry.© Anne Mette Desertification and land degradation occur in arid, semi-arid and dry sub-humid areas and are driven by climatic variations and human activity. The result can be the degradation of soil and vegetation over billions of hectares of rangeland and cropland. The UNDESERT (Understanding and combating desertification to mitigate its impact on ecosystem services) project was established to provide greater insight into desertification and land degradation, and their impacts on ecosystems. The aim was to combat desertification and land degradation in order to mitigate the impacts on ecosystem services and consequently on human livelihoods. This can set in motion a positive cycle that can contribute to alleviating poverty and generate benefits at the community level in accordance with the United Nation’s Millennium Development Goals. Researchers took an interdisciplinary approach, using remote sensing data with vegetation, soil and socioeconomic information for application in novel computer modelling techniques. They worked with local stakeholders to assess the impact of desertification and to ensure successful implementation of sustainable management practices. In addition, the consortium developed decision-support tools and best practice guidelines for natural resource managers based on early warning indicators of environmental degradation. Risk assessments were conducted in six different case studies on a national and a local scale to investigate the effect of land use and climate change on plant species distribution and diversity patterns. Results showed that both land use and climate pose high risks for plant species distribution and diversity patterns. In addition, climate and land-use changes are a serious risk for the diversity of food species. The consortium employed 17 African PhD students who received training to implement the project's work and help mitigate risks from future demographic and climatic changes. Results will be directly transferred to international programmes in order to support strategies and initiatives. UNDESERT helped to mitigate climate change through increased carbon sequestration. It also provided better scientific understanding of reliable indicators thereby helping policymakers to formulate concrete management interventions for mitigating desertification. In this way the project worked to improve the lives of local people and support capacity building through the close collaboration of scientists and stakeholders. A project video is available online: https://www.youtube.com/watch?v=e0gpzL61ZBc PARTNERS Aarhus University, Denmark (coordinator) University of Abdou Moumouni, Niamey, Niger University of Cheikh Anta Diop of Dakar, Senegal Johan Wolfgang Goethe University, Germany Senckenberg Research Institute, Germany University of Ouagadougou, Burkina Faso University of Bobo Dioulasso, Burkina Faso University of Abomey-Calavi of Cotonou, Benin Biosclimate Research and Development, Edinburgh, U.K FUNDING EU-FP7 HOMEPAGE www.undesert.neri.dk EU PROJECT PAGE https://cordis.europa.eu/result/rcn/92175_en.html