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https://hdl.handle.net/11681/9282| Title: | Morphology and ecology of diatoms in sea ice from the Weddell Sea |
| Authors: | National Science Foundation (U.S.) Clarke, D. B. (Diane B.) Ackley, Stephen F. Kumai, Motoi. |
| Keywords: | Antarctic region Sea ice Diatoms Taxonomy Morphology Phytoplankton Weddell Sea Weddell Polynya Expedition Antarctica EPOLAR |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | CRREL report ; 84-5. |
| Description: | CRREL Report Abstract: 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 (5x10^7 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. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/9282 |
| Appears in Collections: | CRREL Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-84-5.pdf | 5.93 MB | Adobe PDF |  View/Open |