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176 Uppsatser om 4 Biodiversity 5 Beech - Sida 12 av 12
Förluster av nedströmsvandrande fisk vid turbinpassage : En fallstudie för att främja den småskaliga, såsom storskaliga vattenkraften
The expansion of the Swedish hydro power has contributed positively to the reduction of the environmental impacts from the fossil fueled power production. In the same time the extensive expansion has been proved to cause negative ecological and local environment impacts of a stream. This, in turn, has been affecting the biodiversity and fish stock negatively, which has been reduced. One of the underlying problems is the lack of possibility for the fish to pass the plants, but it is also directly correlated to the mortality rate of the fish passing through the turbine, which this study is investigating.The mortality rate has been computed for three different locations in Sweden, Untra, Tännfallet and a third one whose location is confidential, and is denoted as Case 1, 2 and 3. The model used to calculate the mortality rate in this investigation is based by existing blade strike models and knowledge and are investigating the death due to mechanical injuries from collision with a runner blade in the turbine.
The effects of mother trees and site conditions on the distribution of natural regeneration establishment in a Bornean rainforest disturbed by logging and fire
In the tropics, logging and wild fire can result in degraded secondary forests with lower biodiversity than in the natural forest. One way to limit forest degradation is to rehabilitate the present large areas of secondary forests. However, there is a lack of knowledge concerning the ecology of tropical tree species and further studies would be advantageous for future rehabilitation efforts of degraded rainforest. The objective of this study was to investigate how mother trees in secondary forest and different site factors affect the abundance and spatial distribution of natural regeneration of non-pioneer tree species in a tropical rainforest in Sabah, Malaysia.
The study took place in the INIKEA Forest Rehabilitation Project area, which suffered from wild fire in 1983 and has been selectively logged over both before and after the fire. Natural regeneration and site variables were inventoried in plots, while mother trees were inventoried in the whole survey area.
En utvärdering av de skogliga vattenplaneringsverktygen NPK+ och Blå målklassning med avseende på vattenkvalitet och vattenkemi
Intresset för vattenfrågor har ökat efter införandet av EU:s ramdirektiv för vatten (vattendirektivet, 2000/60/EG) och inneburit att vattenvård och hänsynstagande till vatten inom skogsbruket fått större fokus. Målet med vattendirektivet är att alla vatten inom EU (Europeiska Unionen) ska erhålla en god kemisk och ekologisk status innan år 2015 samt att ingen försämring får ske. Skogsbruket kan i vissa fall ha negativa effekter på vattenmiljöer. NPK+ och Blå målklassning är två skogliga vattenplaneringsverktyg som har utvecklats för att öka vattenhänsynen i skogen. Verktygen utgörs av ett inventeringsprotokoll som bedömer vattenmiljöns naturvärde (N), påverkan (P), känslighet för skogsbruk (K) samt plusvärden (+).
Effekt av ras och säsong på nötkreaturs avbetningsgrad av konkurrenskraftiga betesmarksväxter :
Grasslands which have been actively managed for a long time and which in modern times have not been subject to cultivation such as fertilization are called semi-natural grasslands. These rare and species-rich areas hold an ecological, biological and historical value and if the management stops these areas will likely diminish. More effective agricultural systems and a declining number of grazing animals have in Sweden, among other countries, made semi-natural grasslands less valuable as foraging areas. Shrubs and fast growing plants rapidly colonize abandoned semi-natural grasslands, threatening biodiversity.
The objective of this experiment was to determine the effects of breed and season on diet composition, with special reference to four competitive species found in wet areas ? in cattle grazing heterogeneous semi-natural grasslands ? and thereby contribute to improved management of these areas.
Beijers Park i "Parkernas Stad" : 125 års parkhistoria på Kirseberg i Malmö
To perform a historical record of Beijers Park's development to date is about securing the tracks back in time. The historical record about the park tells not only the history of the park but the city, district, local residents and art of gardening. As the historical story is documented the necessary base for establishment of any care plans in the future and the base for cultural and historical value the park is made. Beijers park can in such work be treated alone or as part of the context of parks that were built during the same era in Malmö's history.Beijers park origin from the era of the late 1800s, when the entire green structure in Malmö changed. The park area today covers 12 hectares and is located in the district Kirseberg.
Wetland development in the context of ecotourism : a conceptual design proposal for a wetland site in Lake Victoria, Kenya
The travelling sector is expanding worldwide, which puts all destinations under pressure to have a functioning
social system and good resources to manage the problems and take advantage of the opportunities that the
tourism sector can offer a community. The area around Kisumu in Kenya, like much of Africa, tourism can
simultaneously ensure a stable financial future while it removes, as a result of a growing population, more and
more of the scenery that many tourists want to experience. Responsible travel to natural areas that promotes
conservation of the environment and improves the welfare of local people is what defines ecotourism. A
concept that implies a closed cycle, where visitor?s needs are met in balance with what can be given back,
without risking creating imbalances in society.
Along the coast of Lake Victoria, valuable papyrus wetlands provide Kisumu vital ecosystem services
such as water purification, climate adaptation while it also serves as a reservoir for biodiversity.
Handen bakom Vegeholms engelska park - en studie av parken och dess uppkomst
A boom in horticulture characterized the 18th century in Sweden and Skåne. Parks and gardens were gradually built out to become, at the end of the 18th century, large and comfortable facilities which responded to European parks. During the late 1700s the new fashion came to Sweden. In Sweden it was named ?the English style? which directly refers to the English expression ?Romantic style?.
Genetisk modifikation möjliggör resistens mot mastit orsakad av Staphylococcus Aureus
ABSTRACT.
Mastitis is one of the most common diseases affecting dairy cows worldwide. In Sweden annu-ally about 60% of the dairy cows get infected and Staphylococcus aureus cause approximately 30% of these infections. Mastitis causes enormous economic losses. In Sweden, the costs to cure mastitis are estimated to be 192 million SEK per year, excluding the costs for mastitis prevention.
Miljökonsekvenser av dagvattendamm i Skebäck, Örebro : en fallstudie hur miljöpåverkan av en dagvattendamm intill ett Natura 2000-område kan bedömas
Stormwater is surface runoff water that originates from precipitation or snowmelt and that on hardened surfaces prevents to infiltrate the ground. In city areas stormwater can consists of major amounts pollutants and when reaching a lake or watercourse it can cause damages on vegetation and animals. Therefore it is important to treat polluted stormwater before it reaches the recipient.
The municipality of Örebro have since the 90ies an extensive work with treatment of stormwater in sedimentation ponds. A new stormwater treatment project is planned in an industrial estate in Skebäck, Örebro.
Stureholm - en herrgårdsträdgårds historia, utveckling och framtida skötselmål :
Stureholm Manor and garden is a relatively young farming unit on clay soil in the north
western part of Skåne, a province in Southern Sweden. Since the middle of the 19th century
the landscape has been actively cultivated and has been transformed from oak forrest into
farmingland of high efficiency.
The industrial era during the 19th and 20th centuries meant new posssibilites for cultivation of
these clay soils. With equipment like steam ploughs and the possibility to obtain fertilizers,
the harvest increased considerably. This increased prosperity provided estate Stureholm with
a beatuiful corps de logi, a manor.
The trends prevailing in Europe around the turn of the century 1800-1900 against the growing
industrialism, was turned into a artisan movement known as Arts and Craft. The Swedish
followers idealized our Swedish history and they took the turn of a national romantic
movement that later turned into neoclassicism.
Näsbyholm - parken och de närmaste omgivningarna ur ett historiskt och nutida perspektiv
The goal of this work has been to search historical materials, to identify the park's historical development, to prepare proposals on measures and that work should be the basis for further research. The aim has been to train us in searching for and use of materials and to gain an understanding of the process of work with older plants. In the process we have sought and found materials in archives, through literary and oral sources, and email
contacts.
Because of its excellent location perched on an islet in the low landscape Näsbyholm was long a fortress. The old castle on Näsbyholm was from the late 1400s but the site was
fortified much earlier. The islet was at this time completely surrounded by water and there was a drawbridge over the narrow waterline.
The owners are liable since the late 1200s.