Search for dissertations about: "Björn Malmqvist"

Found 2 swedish dissertations containing the words Björn Malmqvist.

  2. 1. What are the effects of natural versus human-caused acidity on stream species diversity and ecosystem functioning?

    Author : Zlatko Petrin; Björn Malmqvist; Steve J. Ormerod; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; acid rain; aquatic insects; biodiversity; ecosystem function; Biology; Biologi;

    Abstract : Human activities have caused acidification of freshwater systems on a large scale resulting in reduced species diversity and ecological functioning in many lakes and streams. However, many naturally acidic freshwater systems have also been found, for instance in northern Sweden. READ MORE

  4. 2. Indirect effects of river regulation : consequences for landbirds of reduced numbers of aquatic insects

    Author : Darius Strasevicius; Björn Malmqvist; Tapio Eeva; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Boreal region; Simuliidae; Leucocytozoon; pied flycatcher; aquatic insects; breeding success; blood parasites; bird communities; river regulation; impoundment; Biology; Biologi;

    Abstract : 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. READ MORE