Essays about: ": boreal streams"

Showing result 21 - 25 of 46 essays containing the words : boreal streams.

1. 21. The role of adjacent vegetation on the recovery of riparian flora : Effect of upstream and upland vascular vegetation after stream restoration in a boreal catchment

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Lena Kretz; [2015]
   Keywords : Channelization; demonstration restoration; species composition; species richness;

   Abstract : Restoration of streams that were formerly channelized for timber-floating has become increasingly common. Generally, this restoration returns boulders from riparian zones to streams, leading to wider, more heterogeneous channels with slower flows. READ MORE

3. 22. Effects of restoration on instream bryophyte communities : Monitoring of two different restoration techniques in the Vindel River system

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Lisa Sandberg; [2015]
   Keywords : Restoration; timber-floating; instream bryophytes; boreal river system; disturbance;

   Abstract : Ecological restoration is the practice of assisting the recovery of a degraded, damaged or destroyed ecosystem. The aim of this study was to analyse the effects of two different restoration techniques on instream bryophyte abundance, species richness and diversity as well as community composition, in streams channelized for timber-floating. READ MORE

4. 23. Decomposition of leaf litter in headwater streams. : Effects of changes in the environment and contribution of microbial and shredder activity on litter decomposition.

   University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Author : Johan Lidman; [2015]
   Keywords : Leaf-litter decomposition; headwaters; microbial decomposition; shredders; ecosystem adaptation;

   Abstract : Headwaters, which are the most common stream order in the landscape, are mostly dependent on energy produced in the terrestrial system, largely consisting of leaf litter from riparian vegetation. The aim of this study was to investigate the decomposition in headwaters of leaf litter from three native (alder, birch, spruce) and one non-native (lodgepole pine) species and how decomposition responds to changes in the environment. READ MORE

5. 24. Variability of GHG emissions from emergent aquatic macrophytes in mixed boreal and Equisetum dominated communities

   University essay from Linköpings universitet/Tema Miljöförändring; Linköpings universitet/Filosofiska fakulteten

   Author : Nina Marliden; [2015]
   Keywords : plant-mediated; GHG flux; methane; carbon dioxide; nitrous oxide; Equisetum fluviatile; wetland; lake;

   Abstract : Plants (macrophytes) growing in lake and wetland sediments are known mediators of greenhouse gases (GHG), specifically methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2O). Current studies have emphasized the potential risk of underestimation regarding emissions of plant-mediated GHGs from terrestrial systems including lakes, streams and other freshwater bodies. READ MORE

6. 25. An evaluation of a newly developed method with required beneficial qualities for measuring pCO2 from fresh water : Test-study performed in a small boreal stream network, south west of Sweden during March – October 2013 and 2014

   University essay from Linköpings universitet/Tema Miljöförändring; Linköpings universitet/Filosofiska fakulteten

   Author : Madelene Lunden; [2015]
   Keywords : pCO2; direct measuring; new chamber method; required qualities;

   Abstract : Studies have concluded that streams emit CO2, which indicates that natural sources of Greenhouse Gases can contribute to climate changefeedback. Why this is of interest is to be able to make reliable climate models. READ MORE