Sökning: "regulated rivers"

Visar resultat 1 - 5 av 29 uppsatser innehållade orden regulated rivers.

1. 1. Sensitivity of Norway Spruce (Picea abies) to inundation.

   Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Whitney Cleopatra Vlahakis; [2023]
   Nyckelord :Inundation; riparian zone; spruce seedlings; restoration; mortality;

   Sammanfattning : Alteration of river flow regimes due to dams result in modifications of riparian ecosystem, with impacts on vegetation, landforms, and habitats. A key characteristic that differentiates riparian zones from adjacent aquatic and terrestrial environments is the event of periodic flooding and water logging. LÄS MER

3. 2. Biflödens effekt på mångfald och abundans av växter i strandzonen utmed älvar : Test av hydrochorins effekt och den longitudinella teorin

   Kandidat-uppsats, Karlstads universitet

   Författare :Daniel Berger; [2023]
   Nyckelord :biology; ecology; hydrochory; plants; biological diversity; riparian; riparian zone; river collector hypothesis; ume river; vindel river; biologi; ekologi; hydrochori; växter; biologisk mångfald; strandzon; kantzon; river collector hypothesis; umeälven; vindelälven;

   Sammanfattning : The riparian zone is a changeable and species-rich habitat with important ecological functions that have long been affected by human activities such as hydropower and forestry. Rivers and their adjacent riparian zones also constitute a transport route for plant parts and seeds in a form of passive transport, called hydrochory, which can contribute to the establishment of plants or the preservation of diversity in the riparian zone. LÄS MER

4. 3. Evaluation of restoration efforts in Dalälven - conditions for survival rate of Salmo trutta and Salmo salar

   Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

   Författare :Ville Svärd; [2023]
   Nyckelord :Restoration; river; salmonids; benthic fauna;

   Sammanfattning : Rivers are among the most anthropogenically affected ecosystems in the world by irrigation, transportation, channelizing, and hydropower. Habitat restorations have become a popular method to restore the heterogeneity and complexity of rivers aiming for improvement of biodiversity. LÄS MER

5. 4. Go with the flow - can environmental flows save us? : A study of the flow patterns in Bredforsen and possibilities for the future

   Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Hilda Brynjarsdotter; [2022]
   Nyckelord :Riparian zone; Riparian vegetation; Riparian vegetation zones; Regulated rivers; Floodings; hydropower;

   Sammanfattning : Freshwater systems have, during human history, endured large-scale impacts. According to the water framework directive, measures must be developed to create a better environment for species in, and connected to, freshwater systems. Hydropower plants has caused loss of natural disturbance (e.g. LÄS MER

7. 5. How does hydropeaking and geological substrate affect aquatic macroinvertebrates in a regulated river?

   Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

   Författare :Andreas Vernby; [2021]
   Nyckelord :Hydropeaking; geological substrate; aquatic macroinvertebrates; EPT species; Hester-Dendy samplers; Korttidsreglering; geologiskt substrat; akvatiska makroevertebrater; EPT; Hester-Dendy-provtagare;

   Sammanfattning : Hydropower is an important source of renewable energy, but is often a cause of degradation to river ecosystems. Hydropeaking, i.e. the frequent alteration of discharge, is a process involved in hydropower generation and has been proven to affect aquatic organisms negatively. LÄS MER