Sökning: "colonization-extinction dynamics"

Hittade 3 avhandlingar innehållade orden colonization-extinction dynamics.

  1. 1. The importance of small forest set-asides for saproxylic biodiversity at stand- landscape- and regional scales

    Detta är en avhandling från Sundsvall : Mittuniversitetet

    Författare :Mari Therese Jönsson; Mittuniversitetet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; boreal forest; colonization-extinction dynamics; dendrochronology; dead-wood dynamics; disturbance dynamics; forest history; fragmentation; metapopulations; national inventories; old-growth forest; picea abies; saproxylic species; set asides; spatiotemporal dynamics; stand reconstructions; tree mortality; woody debris; wood-decaying fungi; woodland key habitats; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi;

    Sammanfattning : .... LÄS MER

  2. 2. Distribution Patterns and Metapopulation Dynamics of Epiphytic Mosses and Lichens

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Tord Snäll; Uppsala universitet.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; plant; metapopulation; model; parameterization; connectivity; dispersal; colonization; extinction; epiphytic; bryophyte; lichen; boreal; fragmentation; Ekologi; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi;

    Sammanfattning : This thesis examines the relative importance of local conditions, dispersal and dynamics of the trees on epiphyte distribution patterns and colonization-extinction dynamics. Study species are the mosses Orthotrichum speciosum and O. obtusifolium, and the red-listed Neckera pennata. LÄS MER

  3. 3. Distribution and persistence of epiphyte metapopulations in dynamic landscapes

    Detta är en avhandling från ; Institutionen för ekologi, Sveriges lantbruksuniversitet

    Författare :Victor Johansson; Sveriges lantbruksuniversitet.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Habitat loss is a major cause of species extinction. Old trees have declined, and this continues because of poor management. Examples are development of secondary woodland in semi-open grasslands, and lack of natural tree regeneration. We therefore can expect that species associated with old tree are declining. LÄS MER