Call number:
ZSP-201-84/5
In:
CRREL Report, 84-5
Description / Table of Contents:
Diatom species composition and relative abundances were determined for ice cores obtained from Weddell Sea pack ice during the October-November 1981 Weddell Polynya Expedition (WEPOLEX). Ice thickness and salinity indicate that the ice was less than one year old. The predominant ice type (70%) was frazil, which has the capacity to mechanically incorporate biological material through nucleation and scavenging. Diatoms were found throughout the length of the cores. Species showed down-core fluctuations in abundance that appeared to be correlated with changes in ice type. Pennate forms were more abundant than centrics, the average ratio being 16:1. Diatom frustules with intact organic material were more abundant (5 billion cells/liter). Differences in species abundances are attributed initially to incorporation of algal cells from a temporally changing water column and subsequently to diatom reproduction within the ice. Scanning electron micrographs illustrating the morphologic characteristics of the predominant species are included.
Type of Medium:
Series available for loan
Pages:
iv, 46 Seiten
,
Illustrationen
Series Statement:
CRREL Report 84-5
URL:
https://apps.dtic.mil/docs/citations/ADA141994
URL:
https://hdl.handle.net/11681/9282
Language:
English
Note:
Contents
Abstract
Preface
Introduction
Materials and methods
Results
Discussion
Conclusions
Literature cited
Appendix A: Taxonomic terms
Appendix B: Differences in species composition and abundance in duplicate samples examined under optical and inverted light microscopes
Appendix C: Morphologic descriptions and SEM micrographs
Location:
AWI Archive
Branch Library:
AWI Library
