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3 - Numerical methods for the analysis of diatom assemblage data

from Part I - Introduction

Published online by Cambridge University Press:  05 June 2012

By
H. John B. Birks
Edited by
John P. Smol  and
Eugene F. Stoermer
H. John B. Birks
Affiliation:
University of Bergen
John P. Smol
Affiliation:
Queen's University, Ontario
Eugene F. Stoermer
Affiliation:
University of Michigan, Ann Arbor
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Summary

Introduction

Research involving diatom assemblages, both modern and fossil, has expanded enormously in recent decades. Because many of the questions asked in such research are quantitative in character (e.g. what was the lake-water pH at AD 1850, what are the major environmental gradients determining the modern diatom assemblages in a set of lakes on the Isle of Skye), there has been a similar development and application of numerical methods appropriate for the quantitative analysis of diatom assemblage data.

Despite diatom ecology and paleoecology being over 100 years old, the relevant statistical methods for assessing the inherent uncertainties associated with diatom counts were only relatively recently developed (in the context of pollen counting) by Mosimann (1965). The application of multivariate data analytical techniques such as cluster analysis, principal components analysis, and correspondence analysis to diatom assemblage data began in the early 1970s. With the upsurge of interest in the mid 1980s in diatom ecology and paleoecology in response to research on the causes of surface-water acidification in Europe and North America, the development and application of data analytical techniques such as canonical correspondence analysis (ter Braak, 1985, 1986) and weighted-averaging regression and calibration (ter Braak & van Dam, 1989) in diatom research expanded greatly (Birks, 1998). Such techniques are now widely used items in the diatomist's tool-kit (Smol et al., 2011 and chapters in this volume).

Type
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Information
The Diatoms
Applications for the Environmental and Earth Sciences
 , pp. 23 - 54
Publisher: Cambridge University Press
Print publication year: 2010

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