Sökning: "Regulated river"

Visar resultat 1 - 5 av 41 uppsatser innehållade orden Regulated river.

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. Effects of summer peaks on brown trout and Atlantic salmon growth and survival in hydropower-regulated Gullspång River

   Kandidat-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

   Författare :Oscar Hallberg; [2023]
   Nyckelord :hydropeaking; hydropower; fish; salmon; salmo salar; salmo trutta; summer; survival; growth; parr; fry; korttidsreglering; vattenkraft; salmonid; salmo salar; salmo trutta; tillväxt; överlevnad; lax; öring;

   Sammanfattning : Daily demands for electrical power are met through sub-daily release of turbined water in the form of hydropeaking. Hydropeaking’s changes to stream flow are listed as a threat to biodiversity in river ecosystems as it causes rapid habitat alteration such as increased depth and velocity, affecting the species living downstream. LÄS MER

4. 3. 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

5. 4. 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

7. 5. Hydrological control of plant species composition and distribution in Dal River alluvial meadows

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

   Författare :Matouš Jimel; [2023]
   Nyckelord :Riparian zone; Alluvial meadows; Riparian vegetation; Regulated river; Flooding;

   Sammanfattning : Northern boreal alluvial meadows are ecologically significant semi-natural ecosystems within the riparian zone. The effects of disturbance like flooding, grazing, and mowing have historically maintained high nutrient turnover and succession disruption that led to high biodiversity, leading to their inclusion in the Natura 2000 network. LÄS MER