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139 Uppsatser om Boreal streams - Sida 4 av 10

Grodsamhällen längs vattendrag på Borneo : En identifiering av habitatkaraktärer viktiga för diversitet och abundans av grodor i tropisk regnskog

The stretch from the riparian zone of a major river, through the mouth and upstream in tributaries forms a range of differing habitats. The aim of this study was to investigate the effect of these different habitats on the riparian frog community in primary rain forest in Borneo; i.e. examine whether any gradients could be demonstrated in terms of species composition, diversity and density of frogs, as well as which environmental characteristics that seem to be of most importance in forming habitats of high conservational value. A major river, Segama, and three of its tributaries were investigated. The surveys were carried out at night by searching for frogs visually and acoustically along the streams, from the shore of the Segama river and 400 metres upstream in the tributaries.

En studie av sedimenttransport, död ved och kantzoner längs två vattendrag i Kilsbergen - från skog till slätt :

Headwater streams are affected by anthropogenic impacts at multiple scales. One aspect of human impact is sediment transport associated to the abundance of stream structures as large woody debris and the composition of the riparian zone from forest to agricultural landscapes. Riparian buffer zones and stream structures like dead wood are considered as generally important structures for protection against an increasing amount of sediment particles in the water. Hence, in this study these structures were quantified in thirty different stream segments on land and in the water. To measure the transport of sediment Whitlock-Vibert boxes were used in three different types of landscapes; forest, transition and fields. The boxes were left in the stream segments for three months, the taken up and dried and weighed. The results showed that the transition-land in Frösvidalsån had the highest sediment transport. The second highest transport of sediment was in Blackstaån at the fields.

Environmental variables determining the occurrence of Cladonia parasitica and Hertelidea botryosa, two boreal lichens confined to wood

Biodiversity is essential for human well-being and it is defined as the genetic variation within species and the variety of species and ecosystems. Biodiversity provides several ecosystem services which are necessary for human beings but there are different threats towards the biodiversity. The biodiversity linked to the forest in Sweden are threatened, about 50 % of the red-listed species in Sweden are associated with forests. This is linked to the commercial exploitation of the boreal forest in Sweden which started 200 years ago. The forestry the last 50 years, with clear-cuts, have contributed to a fragmented forest landscape.

Myrorna - subkulturens butikskedja : en studie i varumärkesutvecklande

AIM This report studies the Swedish vintage store company Myrorna from a branding perspective.METHOD The study has applied the qualitative method where four personal interviews have taken a fundamental ground. The four respondents are taken from different professionals and from different positions by the reason that the brand would be based on a fair assessment. The study is obtaining data that further was collected from the library of University of Gävle, the articles from Emerladinsight.com and remaining pictures- and text materials is taken from the organization Myrorna. The theoretical material have been adapted on the brand Myrorna and then been used to analyze the empirical part. From the general impression that portrays the brand the researcher leads the discussion.RESULT AND CONCLUSION The result shows that the brand Myrorna in some extent do not fulfill the image the brand in the media mediate, between the illusion and the reality there is an empty space according to the research.

Trädföryngring i låga gropar uppkomna vid brand i boreal naturskog :

This study was conducted in the "Kåtaberget" forest reserve in Västerbotten in the summer of 1999. In the summer of 1995, a prescribed burning was performed in the reserve. In some places where coarse dry woody debris (logs and stumps) was present, the fire consumed the wood, as well as parts of the humus layer, creating deep-burned patches. The low intensity ground fire also created dead woody debris by burning off living trees with open fire scars, as well as standing dead trees. In this study, the post-fire tree seedling establishment was examined, with special attention given to the former presence of woody debris. The study also includes a survey of the areal extent of deep-burned patches, as well as an examination of tree seedling establishment in these patches, compared to other burnt ground.

Inverkan av nederbörd, temperatur och frost på årsringens egenskaper hos boreal tall (Pinus sylvestris L.) :

The wide distribution range of our boreal pine (Pinus sylvestris L.) provides a great variation in growing conditions and climate/weather factors that influence the wood development of the trees. A great number of extensive studies have been conducted over the years in order to clarify growth trends of this and other species over more or less wide-ranging areas. In this thesis effects of weather factors were instead compared between different forest stands from the about same geographical location. The effects of precipitation, temperature and frost on the year ring characteristics of pine were studied in the research forest of Svartberget Vindeln, in northern Sweden. The stands differed in site index and silvicultural treatment; fertile ? high stem density, fertile ? low stem density, poor ? high stem density and poor ? low stem density.

Bottensedimentets betydelse för flodpärlmusslans föryngring ? en metodutveckling

The freshwater pearl mussel Margaritifera margaritifera is an endangered species. To survive, the young mussels demand a fairly coarse bottom material containing an appropriate quantity of organic substrate to survive without suffocating. In order to estimate if a bottom is suitable for juvenile mussels, samples of the sediment are needed. To obtain samples a sampling device called the Mulv collector has been developed within this project. Bottom samples were collected from 18 stations in 4 south Swedish streams, Vramsån, Kling-storpsbäcken, Brönnestadsån and Bräkneån.

Freshwater pearl mussel as indicators of Swedish streams - a comparison between freshwater pearl mussel and biological quality elements

The freshwater pearl mussel (Margaritifera margaritifera) is a large freshwater mussel. Because of its sensitivity to human impact, such as eutrophication, acidification and alterations of hydromorphology, the species is considered as a robust indicator of stream water quality and biodiversity. Moreover, due to the species complex life cycle, including a larval stage on the gills of salmon and trout, and sensitivity of early life stages, regeneration is often used as an indicator. The freshwater pearl mussel is also used in the expert judgement of status classification of benthic invertebrates according to the European Water Framework Directive. The purpose of this study was to gain a deeper understanding of the freshwater pearl mussel as an indicator for Swedish streams. It was made with two types of association analyses.

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 (+).

Importance of mire plant community composition when estimating ecosystem level methane emission

Metan är en stark växthusgas som är viktig att ta med i beräkningarna när det gäller klimatförändringar. Feedback från myrmarker vid en ökad temperatur i samband med klimatförändringar har diskuterats, bland annat eftersom myrmarker är en källa för metan till atmosfären. Det finns många faktorer som påverkar metanemission, och en av dom är vegetation. Olika sorts vegetation tros bidra olika mycket till avgivningen av metan. Syftet med denna studie var att undersöka hur stor betydelse det har att ta med olika växtsamhällens sammansättning i beräkningarna för att uppnå korrekta uppskattningar av metanemission från myrmark på ekosystemnivå.

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.

Ligger bäckarna rätt i kartan?

?Are the headwaters streams at the right position in the map? is a study that has been performed on behalf of Holmen Forest, region Örnsköldsvik. This study will be the basis for deciding if the Hydrology Layer Property map or Holmen Forest map will be used for planning nitrogen fertilization in forestry. The background to this study is that nitrogen fertilization near water will increase the risk of nitrogen leaching out into the water systems, which has a negative impact on the environment. The headstreams positions have been recorded in the field with a GPS and the data analyzed in the geographic information system ArcMap.

Fältskiktsvegetationen 30 år efter beståndsanläggning : effekter av olika nivå på skogsskötselintensitet

En landsomfattande försökserie anlades mellan 1984 - 1988 med 15 försöksblock i Sverige. Syftet var att studera den totala effekten på virkesproduktionen av tre olika intensiva skogsskötselalternativ. Inom varje block upprättades en extensiv behandling som innebar att ingen åtgärd efter avverkning vidtogs, en normal behandling som motsvarade markägarens normala skötselintensitet vid tiden när försöken anlades. Slutligen fanns en intensiv behandling där ambitionsnivån skulle vara högre än vad som kunde anses vara normalt. Mitt syfte var att studera hur fältskiktets täckningsgrad och artantal påverkats av de tre olika skogsskötselintensiteterna på de tre försöksblocken Bjurholm, Edefors och Harads i Norra Sverige. På dessa block inventerade jag markvegetationen med fokus på fältskiktet i månadsskiftet mellan Juni och Juli 2013.

Hemsida för ett musikbolag : Website for a music company

The purpose of this report is to answer the question:How do you create a media player that can stream music for a website?We started the work by searching the web and reading books about the subjectand found several technologies to use to stream media files over the internet.We decided upon using the http protocol and created the media player itself inMacromedia Flash.The website is mostly developed with PHP, JavaScript and CSS templates andthe websites design was created with Macromedia Dreamweaver and AdobePhotoshop. We also created an administrative system for the media player withPHP programming.The website contains a simple guestbook; the guestbook makes use of adatabase created with MySQL.Our work resulted in a webpage with a fully functional media player thatstreams audio files together with a corresponding administrative system for it..

Hur påverkar bävern skogens värden?

The activities of beavers in forested landscapes affect both ecological and economical values. The creation of the dynamic wetland mosaic associated to beaver activities can even improve the quality of water and have been documented as an important landscape engineer affecting the environment for many species. The local office of Sveaskog in Skinnskatteberg is responsible for the management of large areas of the forests in the County of Västmanland. In this area one of several company?s goals are to create ten new wetlands in their own forests as a part of cooperation with the Swedish bird society and Swedish wetland association.

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