Sökning: "river"
Visar resultat 1 - 5 av 455 avhandlingar innehållade ordet river.
1. Ljungan : vattenbyggnader i den näringsgeografiska miljön 1550-1940
Sammanfattning : .... LÄS MER
2. Iron in the Lena River basin, NE Russia : Insights from microscopy, spectroscopy and isotope analysis
Sammanfattning : Iron is an important mediator of biotic and abiotic processes on the Earth’s surface, being an electron acceptor in organic matter degradation, a surface for organic matter and trace element adsorption, and a required element for enzymatic processes during primary production. Yet, the role of iron as a mediator of carbon and trace element cycling in high latitude, permafrost-dominated regions remains poorly investigated. LÄS MER
3. Indirect effects of river regulation : consequences for landbirds of reduced numbers of aquatic insects
Sammanfattning : Abstrakt: Jag har undersökt hur älvreglering påverkar mängden knott (Tvåvingar: Simuliidae) längs flera norrlandsälvar och vilka konsekvenser denna påverkan får för den landlevande fågelfaunan. Studien visar att utbyggnad av älvar har en negativ effekt på mängden knott. LÄS MER
4. A Spatial Scale Approach to Fish Habitat Ecology and Impacted Rivers
Sammanfattning : Fish biodiversity in rivers is threatened by continual habitat loss. Evidence to support management and restoration of rivers requires information about the specific habitat requirements for entire fish communities. LÄS MER
5. Environmental considerations in the planning of large dam projects : a study on Environmental Impact Statements and the Southeastern Anatolia Project
Sammanfattning : Large dam projects have played a key role in supporting societal development in the past and continue to be launched, primarily in developing countries. However, large dam projects also cause extensive environmental impacts in the river system, which may reduce the river system's capacity to provide goods, services, and other values apart from those generated by the project. LÄS MER