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224 Uppsatser om Pine - Sida 13 av 15
Autumn water sources for understory vegetation and fungi in a boreal forest : an evaluation using stable isotopes
Understory vegetation and fungi are regarded as important ecological drivers of processes like productivity and nutrient cycling in boreal forests. Whilst those processes are linked to soil water content, relatively little is known about the sources of soil water for these forest
components. During early autumn in boreal forests, temperature falls and large events of rain are frequent which may influence soil water availability. To better understand the autumn plant-soil-fungi water relationships in this ecosystem, I used stable isotopes techniques in this
study to examine the water sources for ericaceous shrubs and fungi in a Scots Pine forest following a large, early autumn rain event. I hypothesize that ericaceous shrubs of two functional groups (evergreen vs.
Insekter i hårt törskateangripna ungtallbestånd i Norrbotten : skadeinventering och artbestämning
Sedan i början av 2000-talet har nordligaste Sverige drabbats hårt av törskateangrepp och det är konstaterat att skadorna framförallt har orsakats av den värdväxlande varianten C. flaccidum. I Sverige visade forskning i början av 1900-talet att flera arter från fjärilssläktet Dioryctria (barrskogsmott) förekom i samband med törskateskador. Med de stora törskateskador som idag finns i norra Sverige är det fortsatt intressant att ta reda på vilka arter som idag kan påträffas och vilken roll de kan spela vid dessa skador.
Syftet med studien har varit att, genom en fältstudie, bedöma förekomst och omfattning av angrepp från barrskogsmott och törskatesvamp i ett urval på 18 bestånd.
Syftet var också att, med en kontrollgrupp genom en förkortad kläckningsprocess, försöka artbestämma barrskogsmotten som angripit träden samt att försöka bedöma hur vanligt det kan vara att insektsangrepp inte upptäcks i fält.
Gis och realtids-GPS på renar : renens habitatanvändning i brukad skog - två vintersäsonger i Vilhlemina Norra Sameby
This study is commissioned by the Swedish University of Agricultural Science (SLU - Department of Forest Resource Management) in coorporation with Sveaskog and Vilhelmina Norra Sami reindeer herding community. The purpose of this study is to analyse movement patterns and habitat use of reindeers during two winter seasons (2005/2006 and 2006/2007) in areas affected by forestry activities such as clearcutting. This study examines the possibilities of analysing information from Reindeer husbandry plans and forest variable data from kNN and SMD, in relation to GPS collar points from reindeers by using Geographical Information System (GIS). Lack of knowledge and understanding between the reindeer industry and the timber industry has often led to heated debates. The possibilities of using this type of technique are very interesting and could increase knowledge concerning land-use issues to different resource users.
The main results from analyses comparing SMD, kNN, data about clearcuts, and GPS collar points from reindeers indicates that clearcut areas, younger forest, coniferous forest on lichen-dominated areas and areas dominated by Pine was preferred by reindeers during the winter period.
Gallringsinventering från helikopter utrustad med profilerande laser och kamera för låghöjdsfotografering
Today Holmen Skog finds and selects suitable thinning stands using data on upper height and basal area. These figures are often based on basic forest data that has been updated with the help of growth prediction models. The problem is that these figures are not always correct. The aim of this study was to investigate if a combination of data from a profiling laser and a digital camera for low elevation photography, can be used for collecting data on number of stems per ha, tree species mixture as well as basal area weighted mean height and upper height for stands. The possibility to use these data to assess the need for thinning cutting was also investigated.Laser data and aerial photographs were collected from a helicopter operating at an approximate height of 100 meters.
Bergsbrunna södra : analys och programförslag
This final project includes an analysis and a programme proposal for the
area Bergsbrunna södra. The area is situated along the railway between
Uppsala ? Stockholm, just south of Uppsala city. A new railway station is
planned here, which make the area attractive as residential area.
There are several values to take into consideration when developing an
area. An extensive analysis and valuation may define and protect different
characters and values, and also find the places most suitable to build
upon.
The area consists of three separate characters of landscape: the wide open
cultivated fields, the hilly wooden ground and the more varying little valley.
There are visual, cultural, social and ecological values to preserve.
The south part of the area is woods with high natural values that borders
to a national park in the natural forest of Lunsen.
Modeller för skattning av den vertikala fördelningen av biomassan på klena träd i röjningsgallringar
I samband med nya mål för energiförbrukningen har behovet av förnyelsebara energislag ökat. Ett sätt att möta detta ökade behov i Sverige är ett ökat uttag av skogsbränsle. Denna ökning skulle till stor del kunna bestå av ökat bränsleuttag i skog med hög stamtäthet och klena träd. För att på ett mer rationellt sätt kunna göra åtgärder i skog av detta slag är det av stor vikt att på förhand kunna uppskatta hur mycket man ska ta ut och hur mycket man ska lämna kvar som näring åt kvarvarande bestånd.
Syftet med detta arbete var att skapa funktioner med vilka man ska kunna skatta biomassafördelningen i vertikal ledd för klena träd.
Framtagandet av funktionerna har gjorts genom regressionsanalyser. Funktionerna bygger på data från Kristina Ulvcronas avhandling Effects of Silvicultural Treatments in Young Scots Pine-dominated Stands on the Potential for Early Biofuel Harvests.
Hägn i skogsbruket :
This survey was made during the autumn of 2002 and the beginning of 2003, on commission
from the National Board of Forestry. The purpose with the survey was to gather experience
and knowledge in the organisation about fencing and this was made through interviews. The
ambition was also to get knowledge from people outside the organisation that have great
experience of forestry and fencing.
The interviews were based on questions that have been composed by the author with help
from the supervisors. The questions were the same to both the personal from the National
Board of Forestry and to the foresters. Interviews were also made with private landowners, gamekeepers, game researcher, the County Administrative Board, the National Road Administration, pole and net retailers and contractors.
The target group for this work is the National Board of Forestry to be forwarded to persons interested in forestry with the ambition to spread knowledge about how to prevent damage on the forest by browsing animals.
The deer populations are big in the south of Sweden and growing populations have increased the damage on plantations of broadleaves of the most species.
Fältmätningar av limträbalkars elasticitetsmoduler : utvärdering av tre mätmetoder
This study investigates three different methods for evaluating MOE,Modulus of Elasticity, in field measurements. The purpose is toinvestigate the possibility to use dynamic measurement methods infield measurements that hitherto (2010) has been performed with staticmethods. The objects of investigation are 20 glulam beams. The firstfield measurement took place in november 2007 and applied a staticmethod based on the standard SS-EN 408. The second measurement,described in this study, took place during summer 2010, and appliedstatic as well as dynamic methods.The MOE of wood is affected by a range different factors.
Viltanpassad röjning längs skogsbilvägar som en foderskapande åtgärd för älgen
The moose is a keystone species in the boreal forest ecosystem, but the dense Swedish population do cause some serious problems. From a forestry perspective, their browsing on young Scot Pine (Pinus sylvestris) causes extensive losses of revenue. Adjusting the cleaning along roadsides of low trafficked forest roads can favour the production of plant species preferred by the moose. This is thought to redirect the moose´s browsing to the roadsides and thereby decrease the damages on commercial forest.The aim of this study has been to present a first evaluation of the vegetation in roadsides, one year after wildlife-adapted roadside clearing has been undertaken. In the wildlifeadapted clearing operation, the roadside was widened by removal of some trees in the forest edge whereupon a complementary clearing with a conventional chain flail was conducted.
Landskapsideal : hur uppväxtens landskap formar individen
The landscape can be something that you rest your eyes on, something that goes quickly past outside the windscreen or the place for the daily work.
To me, landscape is everything around us ? the city, the field and the forest. But what is landscape for you? What does the idea of the landscape stand for? How does our view of the landscape become influenced of the place where we grow up? And the differences between peoples different views of the landscape ? what does they depend on?
My point of the view for this paper is that the landscape ideals mostly depend on the landscape where you grow up and that it depends less on the differences between the individuals.
As a landscape architect the idea of the landscape is the essential. The more we learn, the more we realize how complex it is, but deep down we always have our own experiences and memories and that shapes our personalities.
Gallringsprioritering av contortabestånd :
Extensive planting of the tree species lodgepole Pine (Pinus contorta var. latifolia) during the 1970s and 80s has resulted in large areas now being available for commercial thinning. However, the varying quality of the stands creates a problem. The purpose of this study was to investigate, at the Torsby district of the Stora Enso forest company, how well the present computer records of the stands correspond to reality and determine which stands are, from a qualitative perspective, suited for timber production. Finding variables that indicate better stands would give Stora Enso the possibility of selecting qualitative stands which are more profitable to thin.
The study included 32 stands containing at least 70 % Pinus contorta.
En analys av SCA Skog AB's metod för egenuppföljning av gallringar :
A high quality is highly requested in today?s thinnings, since these are the base for continued value development of the forests. Thinning quality often means a minimization of damages on soil, stems and roots during the cutting. One way to reach a high quality is to set up goals that will be followed up after the cutting is made. Self-checking gives information of the machine drivers work and guarantees the customers a good quality of work.
Utvärdering av flygbildstolkning för uppskattning av beståndsvariabler och åtgärdsförslag i ungskogar : en studie på Korsnäs Skog och Bergvik Skog AB i västra Dalarna
In Korsnäs district Dala Väst there were problems with information concerning their younger forests, mainly those in pre-thinning stage. They were divided into large, heterogeneous stands with often poor stand data quality. In 2006 an aerial photo interpretation of the young forests was conducted to fix these problems. Necessary information to get from the interpretation were silvicultural management suggestions, new stand delineation and new stand data. This thesis is supposed to evaluate the quality and usability of the interpreted data.
To evaluate the interpretation an objective control inventory was conducted in 60 stands, either through callipering or counting stems.
En mötesdestination ur ett upplevelseperspektiv: konceptutveckling av mötesindustrin i Luleå genom upplevelseproduktion
Forskning påvisar att upplevelser och aktiviteter ökar markant inom turismnäringen. Jag finner det därför intressant att undersöka mötesdestinationer utifrån ett upplevelseperspektiv. Syftet med uppsatsen är att studera hur en attraktiv mötesdestination kan skapas och utvecklas med hjälp av upplevelseindustrin och upplevelseproduktion. För att uppfylla syftet och forskningsfrågorna har en fallstudie med personliga intervjuer genomförts på tre mötesdestinationer. Intervjuer har gjorts med aktörer inom mötesindustrin i Luleå samt en jämförande studie med mötesdestinationerna Gotland och Norrköping.
Gestaltning av vägar i Skåne - kopplat till sju regionalt viktiga stråk :
This work derives from the question ?What is a beautiful road??. The question is being discussed in interviews with two employees at the Swedish National Road Administration and two former members of the ?Council of environment and beauty? at the Swedish National Road Administration. The interviews are summarized in my own discussion about the concept of ?Beautiful roads?.