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Title: A field-based and literature-based study of the lundgreni (Late Wenlock, Silurian) graptoloid extinction event
Author: Muir, Lucy A.
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2003
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The extinction event at the end of the lundgreni graptoloid biozone was one of the most severe extinction events to affect graptoloids during the Silurian. There are many hypotheses of what caused the extinction, but little work has been done relating the extinction to graptoloid ecology. In this study, the lundgreni extinction event has been investigated in the field and from existing literature. Fieldwork has been conducted in the UK and Australia. Data gathered from the literature has been used to compile a global database of species occurrences before and after the event. Both the field-based and the literature-based studies have been used to test hypotheses of the ecological causes of the lundgreni extinction. The hypotheses considered include that extinction is random, that there is a correlation between geographical distribution and extinction probability, and that the life history strategy of a species (whether the species is K – or r-selected) affects extinction probability.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available