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348 Uppsatser om Ecological niche - Sida 5 av 24
Till synes orörd skog : naturvärden och kulturhistoria i Rekdalen under 400 år
Nature conservation has for a long time been founded on the assumption that high ecological values depend on low human impact. In Sweden this has led to forests with these characteristics being strictly protected from human influences. However, it is also known that historical land-use can enhance ecological values in forests. Mountainous forests in Sweden, which have not been affected by modern forestry, have for a long time been considered as untouched by people. However, forest history research has in recent years shown that even these areas have been used by people for a long period of time.
Lokala skillnader i konsumtion av påväxtalger och terrestra löv hos en differentierad population av Asellus aquaticus
That ecological and evolutionary processes can take place on the same time scale is a recent insight. Today we also know that they are directly linked to each other. In the lake Tåkern, in year 2000, there was a structural change when phytoplankton declined and submerged vegetation, mainly stoneworts began to spread. This led to evolutionary changes in the aquatic sowbug, Asellus aquaticus which had previously been limited to the reed, most likely feeding on detritus. But then, sowbugs could exploit the new habitat in stoneworts and a new food resource in terms of periphyton.
Omslagstrender - en studie av vad som höjer uppmärksamhetsvärdet hos tidskrifter
Through interviews, a questionnaire survey and an indepth analysis of the Swedish magazines Veckorevyn and Magazine Café has a number of parameters been made visible. It was difficult to obtain an unambiguous result when the journal's target audience is crucial for the cover design. Nevertheless, we can generally say that the transparent varnish of covers, PMS colors and enclosing the journal in plastic do not increase the attention value, as this occurs in many magazines. Due to today's tough competition among journals, we believe that they will need to niche themselves much harder to survive. We also believe that the new, big trend is that more covers will become more plain and stylistically pure, with one big communicating image and fewer coverlines, as many covers were designed during the 1940s..
Självbild: påverkan och motståndskraft ur ett utvecklingsekologiskt perspektiv
Our paper is a study about youth and their self-images. During our practical training period we found that the problems young people had always were connected with their self-image. We therefore wanted to find out what youth believe influence their self-image. The purpose of our study was to examine young people and their self-images in a perspective of the ecological systems model. Essential issues have been what self-images young people have, what they consider influence their self-image most, how they think they can resist influence from the environment and how they would like to be influenced by the environment if they could decide themselves.
Scenarier för rekrytering av ridskolehästar år 2020
It is important to ensure and develop the Swedish model for riding schools, since the pupils at a Swedish riding school learn both to ride and to handle horses. There is a pronounced problem of stagnation and in some cases a reduced demand in several of the equine industry sectors including breeding with decreased coverings. The aim of this study was to cast light on how representatives from the horse industry looks at riding schools and their recruitment of horses in the next five years. The research issue was ?Will there be difficulties regarding horse recruitment in 2020 and in that case, what are the consequences??
The results of this work consist mostly of material from a workshop on how the riding school will be affected by reduced breeding in the future.
Lillån : Statusbedömning enligt EU:s ramdirektiv för vatten
In Sweden, the County Administration board is responsible for improving the water quality in lakes and watercourses according to the European Union Water Framework Directive. In Västmanland county, where river Lillån is situated, the County Administration of Västmanland have the main responsibility for the aquatic environment in that area. The knowledge about the different watercourses in the chatchment of river Lillån is today limited. The aim with this study was to evaluate the ecological quality of River Lillån based on water chemistry analyses and benthic fauna investigations. The aim was also for the benthic fauna to compere different samplingsites and sampling methods with each other in order to see how the species composition changes in the river, and to see the advantages and disadvantages with different sampling tecniques.
Fördjupad miljöriskbedömning av förorenade markekologiska system. : Integrering av kemisk, toxikologisk och ekologisk information.
AbstractThe research project Liberation, supported by the European Commission under the Environment and Sustainable Development Programme (Fifth RTD Framework Programme) aimed at developing a decision support system for ecological risk assessment of contaminated sites has proposed a tiered system including the triad method. This method integrates contaminant chemistry and bioavailability analyses with observed ecotoxicological effects in soil and groundwater. In this study the triad method was used to perform a risk characterization of a former surface treatment and metal industry, now used for the student union buildings of the Mälardalen University in Eskilstuna, Sweden. On the site, high concentrations of copper, zinc and nickel have been detected in the soil in a preliminary investigation of contaminant levels with XRF. For performing the risk assessment of the site according to the triad method, contaminant bioavailability, soil metal concentrations and soil toxicity were determined and an ecological assessment was carried out on four selected soil samples (one reference soil and three samples with low (B), medium (C) and high (D) contaminant levels). Contaminant bioavailability was measured through leaching (ISO TC 190/S7) and biouptake tests (DGT).
Ekologisk aspekt som mervärde : En studie om långsiktig överlevnad för ekologiskt nischade livsmedelsföretag
Background: With the increased globalization food prices went down for a while, only to skyrocket to new levels. Prices of organic food, which already were more expensive than conventional, are now even more expensive. The current financial crisis results in reduced consumption which creates a threat to the smaller grocery stores. Globalization and the increased competition have had a negative impact on the environment but at the same time the desire to solve these issues has increased appreciably. The environmental aspect has been given higher priority by the individual, which led to a wider range of organic products and dramatically increased the number of stores selling organic products, leading to a greater competition among the stores selling organic food. Problem definition: What factors are important for organic retail business long term survival?Purpose: Trough case studies analyze and evaluate the organic niche retail companies? strategies of marketing.Methods: This study is based on both qualitative and quantitative research methods.
Ungdomars upplevelse av mobbning sett ur ett utvecklingsekologiskt och utvecklingspsykologiskt perspektiv
The purpose of our study was to examine 13 to 14 year olds experience of bullying from a perspective of human developmental ecological systems. The questions at issue were: How do the young people themselves define the concept of bullying? Which own experiences do the young people have of bullying? How come bullying exists according to the young people? How do the young people experience that their surroundings view bullying? What do the young people consider that you can do about bullying? We used a qualitative method to collect and handle our primary empirical data. We did individual interviews with ten young people.The results of our study shows that the majority of the persons interviewed thought people bully because they have bad home conditions and that they are unsure of them selves. Many of the young people talked about three different groups in a school class: The popular, the less popular and the nerds.
Samiskt skogsutnyttjande, dimensionsavverkningar och naturvärden : skogshistorisk analys i block 5, Pakko kronopark i Norrbotten
In order to understand the human impact on today?s remaining ?virgin? forest and to develop sensible management strategies for future reserves, it is necessary to know how these forests have developed. This knowledge can be gained by using forest history analysis. here are large areas of forests still untouched by modern forestry in the mountainous region in the county of Norrbotten. These forests are highly interesting study objects from an ecological and historical point of view.
Barnboksskrivande : - En kvalitativ studie om framställande ochpublicering av barnböcker
The purpose of this study is to investigate how a children's book is suggested to be prepared in order to be accepted for publication by a publishing house in Sweden today.My questions was first to clarify the concept of a "children's book". Secondly, to understand if there are any guidelines to follow regarding the design and illustration of a children´s book, and how to proceed with the best chances of getting a mauscript published.To answer the question, I have chosen to use a qualitative method containing questionnaire items involving eleven Swedish publishers of children's literature.My results show that children's books includes all literature that has an target audience of people between 0-18 years of age. The most important thing is that the book's material is appropriate to the target group's level of mental perceptions and emotional competence. The material which then is submitted to the publisher will need to be of the highest quality and the author must investigate a consistent niche in order to submit the material to a publisher..
Göteborgs blå struktur : med studie av Osbäcken
Gothenburg municipality has a lot of natural water. This paper enhances the function and importance of water in the city. It also deals with the problems of sewage water and flooding. Gothenburg has reached an advanced stage of water planning. By developing a Waterplan, the municipality highlight that water has an important position in the urban planning.
En studie av hållbara alternativ till odlingstorv : - vid jordförbättring inom trädgård
Pharmaceuticals are environmental pollutants that are a major threat to aquatic ecosystems and very little is known about their ecological consequences. In this study growth, survival and behaviour (sociability, activity and boldness) of perch fry (Perca fluviatilis) were examined in order to study the possible effects of exposure to a benzodiazepine anxiolytic drug, Oxazepam, during embryonic development. The study tested following hypotheses: (1) perch growth is affected positively by exposure during embryonic development; (2) early perch survival is affected positively by exposure during embryonic development; and (3) boldness and activity increases while sociability decreases in perch fry exposed during embryonic development. Embryos of naturally spawned perch were exposed to water with two different concentrations of Oxazepam. The embryos were exposed during different parts (24-hour periods) of the embryonic development, because embryos may be more vulnerable at certain times during embryonic development and/or because the exposure at different times can produce different effects.
Örter - en nisch? :
A tight economy and a keen competition force the Swedish agricultur to do a structural rationalization. The quantity of farmers is less but the units are growing. How to make money I think some kind of niche is necessary. In my examwork I have locked how to farm herbaceous plant and the marking of herb to feedstuff for horses.
Today health food and alternative medicine are accepted to use and there is an increase in demand.
The Swedish market for herbaceous plants to horses is small and the products are mostly imported. But there is a group of consumers who is willing to pay a higer price for Swedish cultivated herbs.
The only way to find out which herbaceous plants I could cultivate is to make a test cultivate.
I think that the market for herbaceous plants is growing.
Lärande för långsiktig hållbarhet: jämförande diskursanalys av medborgarskap för "hållbar utveckling" i Piteå respektive Växjö kommun
Sustainable development has become the ideology of the twentieth first century. As an important concept and as a framework of political action, sustainable development can at this point be considered as the very symbol of a paradigm in the international debate over environmental issues and the threats of climate change. But what does the concept of sustainability actually suggest? This thesis uses discourse analysis in order to examine the Swedish learning for sustainable development as to three different discourses on the national arena: the government and the municipals of Piteå and Växjö respectively. When the study foremost concerns official policy documents that contain associations with the study area, the methodology used takes into consideration both language, signs, metaphors and so called story lines.