Sökning: "Örjan Östman"

Hittade 3 avhandlingar innehållade orden Örjan Östman.

  1. 1. Assembly Mechanisms in Aquatic Bacterial Communities : The Role of Disturbances, Dispersal and History

    Författare :Mercè Berga Quintana; Silke Langenheder; Eva Lindström; Örjan Östman; Mathew Leibold; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; diversity; community composition; metacommunity;

    Sammanfattning : Environmental conditions, biotic interactions, dispersal and history have been suggested to be important processes influencing the spatial distribution of organisms and thus to affect community assembly. Understanding how these processes influence community assembly is important, particularly because community diversity and composition are suggested to be relevant for ecosystem functioning. LÄS MER

  3. 2. Clearing up Culex Confusion : A Basis for Virus Vector Discrimination in Europe

    Författare :Jenny C. Hesson; Jan O. Lundström; Örjan Östman; Åke Lundkvist; Anssi Laurila; Laura D Kramer; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Culex torrentium; Culex pipiens; mosquitoes; vector; ornithophilic; Sindbis virus; West Nile virus; Populationsbiologi; Population Biology;

    Sammanfattning : Mosquito species of the Culex genus are the enzootic vectors for several bird-associated viruses that cause disease in humans. In Europe, these viruses include Sindbis (SINV), West Nile and Usutu viruses. The morphologically similar females of Cx. torrentium and Cx. LÄS MER

  4. 3. Long Term Studies of Insect Abundances in Temporary Wetlands in Relation to Hydrology, Predation and Bti

    Författare :Thomas Persson Vinnersten; Jan O Lundström; Örjan Östman; William Walton; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; floodwater mosquitoes; mosquito control; predation; aquatic insects;

    Sammanfattning : Long-term insect abundances have been studied to investigate factors structuring the insect communities of the temporary wetlands around the River Dalälven floodplain. In the wet meadows and swamps in the River Dalälven floodplains recurrent floods are the ultimate prerequisite for high production of floodwater mosquitoes. LÄS MER