Essays about: "bäckar"
Showing result 1 - 5 of 39 essays containing the word bäckar.
-
1. Riparian plant biodiversity and community composition of ditches and straightened streams : identifying key environmental drivers in a boreal forest setting
University essay from SLU/Dept. of Forest Ecology and ManagementAbstract : Modified ecosystems are typically seen as degraded and having no ecological value. In many cases, the modification of the ecosystem was done more than 100 years ago and may have had time to recover and become a refugia for species that were once more common in the landscape. READ MORE
-
2. “It was a free and healthy job” : timber floating on the river Ångermanälven in the 20th century
University essay from SLU/Dept. of Forest Ecology and ManagementAbstract : The exploitation of northern Sweden's forests began in about the 1830s and continued expanding northwards over the following decades. A key factor that enabling the exploitation of these forests was the natural infrastructure, such as the network of rivers, creeks and flooding during the summer, which made it possible to float timber from the forests to the sawmills on the coast. READ MORE
-
3. Utforskade dataanalys av bäckarna i Undersviks Tillväxtpark före BAG-försök
University essay from SLU/Dept. of Forest Ecology and ManagementAbstract : Förorening av vatten är ett stort problem både på lokal och global nivå. Övergödning från mänsklig aktivitet såsom jordbruk och industrier utgör ett markant hot mot våra vatten (Rheinheimer 1998), å andra sidan skulle skogsbruket kunna förbättra sin produktion med större nyttjande av gödsel. READ MORE
-
4. Sediment transport in small streams is related to riparian buffer width : a comparison between wide and narrow riparian buffers
University essay from SLU/Dept. of Forest Ecology and ManagementAbstract : This study aims to provide information about how different widths of riparian buffers affect the quantity and quality of sediments transported in a small stream after a clear – cut harvest. Small streams have critical influences on downstream rivers and excessive transported sediments can have large negative effects on the aquatic system. READ MORE
-
5. Aspects of erosion of restored trout spawning beds in two streams in Northern Sweden
University essay from SLU/Dept. of Wildlife, Fish and Environmental StudiesAbstract : Many rivers and streams in northern Sweden have been channelized due to timber floating. This has severely degraded the spawning habitats for salmon and trout, and therefore a common action when restoring channelized rivers is to establish new spawning beds by adding gravel to the streambed. READ MORE