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Title: Palynological Studies in South Georgia.
Author: Barrow, C. J.
ISNI:       0000 0001 3448 7767
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 1977
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In this thesis Post-glacial deposits up to 9,863 years old have been examined in an attempt to determine and interpret the vegetational history of the sub-Antarctic island of South Georgia. Sample collections were made mainly from the sheltered north-eastern coastal lowlands surrounding Cumberland West and Cumberland East Bays, but also include material from the exposed south-west coast. A pollen diagram from the Falkland Islands, the nearest floristically-rich landmass to South Georgia, is presented in the Appendix (Fig. A 1.3). This is the first to have been made from the Falkland Islands. The Quaternary palynological and climatological research that has been carried-out in the sub-Antarctic and Southern high latitudes is outlined in Chapter I, followed by an introduction to the environment and biota of South Georgia (Chapter 2). The main body of this thesis (Chapters 3,4, & 5) deals with collections, methods of study, and presents the results of eight sets of pollen analyses together with a study of the modarn pollen deposition. The final chapter (Chapter 6 and 7) attempts a cautious interpretation of the results. Many elements of the present vascular flora are recorded from deposits over 9,000 years old; the suggestion is therefore that some of the present-day flora of South Georgia survived the last-glaciation, and that conditions were quite warm in the sampled localities c. 9,000 yrs. E. P. During the last 9,000 years conditions have not prevented the growth of Acaena spp. Grass pollen deposition has fluctuated, probably reflecting the fortunes of coastal tussock grass, Paa flabellata, in response to climatic, eustatic successional, or biotic causes.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available