Essays about: "Freshwater pearl mussel"

Showing result 6 - 10 of 11 essays containing the words Freshwater pearl mussel.

1. 6. Bottensubstratets inverkan på föryngring av Flodpärlmussla

   University essay from SLU/Dept. of Forest Ecology and Management

   Author : Viktor Boström; Hjalmar Holm; [2012]
   Keywords : Margaritifera margaritifera; freshwater pearl mussel; regeneration; bottom substrates;

   Abstract : The freshwater pearl mussel (Margaritifera margaritifera) is threatened throughout its range. There has been a substantial decline of the species and one major reason is habitat degradation. READ MORE

3. 7. Om behovet av ett avrinningsområdesanpassat skogsbruk

   University essay from SLU/School for Forest Management

   Author : Robin Pettersson; [2011]
   Keywords : Avrinningsområde; Skogsbruk; Vatten;

   Abstract : The Swedish forest have about 100 000 km of watercourses and it’s an important structure in Swedish landscapes and catchments. In some of the watercourses lives spieces like the freshwater pearl mussel (Margaritifera margaritifera) and brown trout (Salmo trutta) which both are sensitive for inteference from the forestry. READ MORE

4. 8. Can GIS be used to identify streams with successful recruitment of freshwater pearlmussels (Margaritifera margaritifera)?

   University essay from Fakulteten för samhälls- och livsvetenskaper

   Author : Jan-Olov Högberg; [2009]
   Keywords : Margaritifera margaritifera; Freshwater pearl mussel; GIS; recruitment; landscape; spatial information;

   Abstract : The freshwater pearl mussel (Margaritifera margaritifera) has declined dramatically throughout its range and is faced with recruitment problems in most of the streams where populations still persist. Human activities, such as forestry and agriculture, are thought to be the main reason for these problems. READ MORE

5. 9. Sediment Requirements for Freshwater Pearl Mussel (Margaritifera margaritifera) Recruitment : Sedimentkraven för Rekrytering hos Flodpärlmussla (Margaritifera margaritifera)

   University essay from Institutionen för natur och miljö

   Author : Katrin Wahlström; [2007]
   Keywords : Biology; Ecology; Biologi; Ekologi;

   Abstract : Abstract The sediment requirements for freshwater pearl mussel (Margaritifera margaritifera) recruitment, in 18 rivers in the counties of Västra Götaland, Örebro, Värmland and Västmanland in Sweden, were investigated. The top 4 cm of sediment in the rivers was analysed in terms of size, distribution and organic compound within the fine sediment. READ MORE

6. 10. Is there a link between forestry and the decline of the freshwater pearl mussel Margaritifera margaritifera in central Sweden?

   University essay from Fakulteten för samhälls- och livsvetenskaper

   Author : Alice Jensen; [2007]
   Keywords : ecology; forestry; Sweden; mussel; freshwater pearl mussel; GIS; ekologi; skogsbruk; Sverige; mussla; flodpärlmussla; GIS;

   Abstract : The freshwater pearl mussel, Margaritifera margaritifera, is a species in decline throughout its entire range in Europe and North America. In Sweden, the species has disappeared from one third of the watercourses it was found in a century ago, and recruitment occurs in only one third of the approximately 400 populations of mussels remaining. READ MORE