Dispersal of bryophytes across landscapes

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Lönnell, Niklas,1969-Stockholms universitet,Institutionen för ekologi, miljö och botanik (author)

Dispersal of bryophytes across landscapes

BookEnglish2014

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Stockholm :Department of Ecology, Environment and Plant Sciences, Stockholm University,2014
41 s.
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:su-100064
ISBN:9789174477788
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-100064URI

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Language:English
Summary in:English

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Subject category:vet swepub-contenttype
Subject category:dok swepub-publicationtype

Notes

At the time of the doctoral defence the following papesr were unpublished and had a status as follows: Paper 2: Epubl ahead of print; Paper 3: Manuscript; Paper 4: Manuscript
Dispersal, especially long-distance dispersal, is an important component in many disciplines within biology. Many species are passively dispersed by wind, not least spore-dispersed organisms.In this thesis I investigated the dispersal capacity of bryophytes by studying the colonization patterns from local scales (100 m) to landscape scales (20 km). The dispersal distances were measured from a known source (up to 600 m away) or inferred from a connectivity measure (1–20 km). I introduced acidic clay to measure the colonization rates over one season of a pioneer moss, Discelium nudum (I–III). I also investigated which vascular plants and bryophytes that had colonized limed mires approximately 20–30 years after the first disturbance (IV).Discelium effectively colonized new disturbed substrates over one season. Most spores were deposited up to 50 meters from a source but the relationship between local colonization rates and connectivity increased with distance up to 20 km (I–III). Also calcicolous wetland bryophyte species were good colonizers over similar distances, while vascular plants in the same environment colonized less frequently. Common bryophytes that produce spores frequently were more effective colonizers, while no effect of spore size was detected (IV). A mechanistic model that take into account meteorological parameters to simulate the trajectories for spores of Discelium nudum fitted rather well to the observed colonization pattern, especially if spore release thresholds in wind variation and humidity were accounted for (III).This thesis conclude that bryophytes in open habitats can disperse effectively across landscapes given that the regional spore source is large enough (i.e. are common in the region and produce spores abundantly). For spore-dispersed organisms in open landscapes I suggest that it is often the colonization phase and not the transport that is the main bottle-neck for maintaining populations across landscapes.

Subject headings and genre

NATURVETENSKAP Biologi Botanik hsv//swe
NATURAL SCIENCES Biological Sciences Botany hsv//eng
NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
anemochory
bryophytes
colonization
connectivity
diaspores
dispersal kernel
establishment
spore dispersal
long-distance dispersal
mechanistic model
mosses
realized dispersal
spore release
Lagrangian stochastic model
wind dispersal
Plant Ecology
växtekologi

Added entries (persons, corporate bodies, meetings, titles ...)

Hylander, Kristoffer,DocentStockholms universitet,Institutionen för ekologi, miljö och botanik(Swepub:su)khyla (thesis advisor)
Jonsson, Bengt Gunnar,ProfessorMid Sweden University (thesis advisor)
Sundberg, Sebastian,DocentUppsala University / Sweden University of Agricultural Sciences (thesis advisor)
Ehrlén, Johan,ProfessorStockholms universitet,Institutionen för ekologi, miljö och botanik(Swepub:su)ehrle (thesis advisor)
Virtanen, Risto,DoktorUniversity of Oulu, Finland (opponent)
Stockholms universitetInstitutionen för ekologi, miljö och botanik (creator_code:org_t)

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Botany

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