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  4. Evolutionary ecology of Alexandrium(Dinophyceae)with special emphasis on genotypic and phenotypic variation in the toxigenic species A. tamarense
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-diss000116670

Evolutionary ecology of Alexandrium(Dinophyceae)with special emphasis on genotypic and phenotypic variation in the toxigenic species A. tamarense

Veröffentlichungsdatum
2009-12-03
Autoren
Alpermann, Tilman Jens  
Betreuer
Cembella, Allan  
Gutachter
Medlin, Linda  
Zusammenfassung
In this thesis, broad phenotypic variation in the genus Alexandrium with respect to allelochemical properties targeting a wide range of other planktonic protists was observed and indications of co-evolutionary processes shaping the respective allelopathic phenotype were found. At the intra- and inter-population level in the species A. tamarense large genotypic variation was observed. A conceptual population genetic model on how this variation is preserved in the long run - despite evidence of clonal selection and frequency shifts of clonal lineages during vegetative planktonic growth - is presented. Phenotypic characters such as allelochemical properties and content and relative composition of paralytic shellfish poisoning toxins (PSP) may be such characters that are under directional selection during planktonic population growth and harmful algal bloom (HAB) development. However, isolates from the populations studied varied widely with respect to these quantitative genetic characters.
Schlagwörter
Alexandrium tamarense

; 

Alexandrium tamarense species complex

; 

amplified fragment length polymorphism

; 

AFLP

; 

microsatellites

; 

paralytic shelfish poisoning

; 

PSP

; 

phenotypic variation

; 

allelopathy

; 

allelochemical interactions

; 

population differentiation

; 

cyst bed

; 

life cycle
Institution
Universität Bremen  
Fachbereich
Fachbereich 02: Biologie/Chemie (FB 02)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

00011667.pdf

Size

2.05 MB

Format

Adobe PDF

Checksum

(MD5):ce2cc7e1de37c05158ae4438e6b33868

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