skip to navigation
ADS Main Website
Help
|
Login
/
Browse by Series
/
Series
/ Journal Issue
Holocene 16 (8)
Title
The title of the publication or report
Title:
Holocene 16 (8)
Series
The series the publication or report is included in
Series:
The Holocene
Volume
Volume number and part
Volume:
16 (8)
Publication Type
The type of publication - report, monograph, journal article or chapter from a book
Publication Type:
Journal
Editor
The editor of the publication or report
Editor:
John A Matthews
Publisher
The publisher of the publication or report
Publisher:
Sage Publications
Year of Publication
The year the book, article or report was published
Year of Publication:
2006
Source
Where the record has come from or which dataset it was orginally included in.
Source:
BIAB (The British & Irish Archaeological Bibliography (BIAB))
Relations
Other resources which are relevant to this publication or report
Relations:
URI:
http://hol.sagepub.com/content/vol16/issue8/
Created Date
The date the record of the pubication was first entered
Created Date:
03 May 2007
Please click on an Article link to go to the Article Details.
Article Title
Access Type
Author / Editor
Page
Start/End
Abstract
DNA from pollen: principles and potential
K D Bennett
L Parducci
1031 - 1034
The paper describes the authors' extraction of ancient DNA (aDNA) from Holocene pollen and discusses the potential of the technique for elucidating timescales of evolutionary change. The authors demonstrate that plastid DNA is recoverable and usable from pollen grains of Scots pine (Pinus sylvestris) from 10 ka and 100 years ago. Comparison of the ancient sequences with modern sequences, obtained from an extant population, establish a first genetic link between modern and fossil samples of Scots pine, providing a genetic continuity through time. One common haplotype is present in each of the three periods investigated, suggesting that it persisted near the lake throughout the postglacial. It is argued that the retrieval of aDNA from pollen has major implications for palaeoecology by allowing investigation of population level dynamics in time and space, and tracing ancestry of populations and developing phylogenetic trees that include extinct as well as extant taxa. The authors claim that the method should work over the last glacial oscillation, thus giving access to ancestry of populations over a crucial period of time for the understanding of the relationship between speciation and climate change.
Detecting differences in vegetation among paired sites using pollen records
Shinya Sugita
Tim Parshall
Randy Calcote
1123 - 1135
The `Qualitative Assessment of Difference' method (QAD) is proposed to objectively detect differences in the relative abundance of vegetation between paired sites using pollen percentages. This method corrects for intertaxonomic differences in pollen productivity and neutralizes influences of background pollen on pollen representation of vegetation, using an inverse form of the Extended R-value model. The authors test the method using modern pollen-vegetation data from small hollows in northern Michigan and from northwestern Wisconsin in the USA. Compared with pollen percentages, the one-tailed Fisher Exact test shows that the QAD method significantly improves the accuracy of the results for all taxa. The rank order of sites based on QAD is significantly correlated to the rank order of sites based on a survey of vegetation composition surrounding the hollow for each taxon (Spearman's rank-order correlation coefficients; p<0.001). The authors apply QAD to 9000-year pollen records from two forest hollows c. 6 km apart in northern Michigan. Among seven taxa compared, Pinus, a taxon with well-dispersed pollen and a high pollen producer, often displays discrepancies in the direction of difference between QAD and the percentage-based method, demonstrating that pollen percentages alone do not always reflect differences in vegetation composition accurately. When several similarly sized sites are available in the same vegetation zone, QAD can objectively rank-order sites for individual taxa in relation to, for example, differences in soils, topography, patterns of species invasion, natural and anthropogenic disturbances, and other factors. Includes
Appendix A: inverse forms of the Extended R-value models to re...
1132 - 1133
Appendix B: error estimates for the QAD method
1133 - 1134
