Vertical zonation and community transition of sea-ice diatoms in fast ice and platelet layer, Weddell Sea, Antarctica
Vertical zonation and community transition of sea-ice diatoms in fast ice and platelet layer, Weddell Sea, Antarctica
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南极洲威德尔海固定冰和片状层中海冰硅藻的垂直分带和群落转变
DOI：
10.3189/172756401781818590
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发表时间：
2001
影响因子：
2.9
通讯作者：
Gerhard Dieckmann
中科院分区：
文献类型：
--
作者：
S. Günther;Gerhard Dieckmann
1995年6月至12月，对南极洲Atka湾快冰和下垫层硅藻的分类组成变化进行了研究。(1)春季以鞭毛虫为主的室内群落；(2)以一种小种白茅Fragilariopsis mulus为主的底层群落；(3)血小板-冰层以附着在冰血小板上生长的amphiproora Kufferathii和Thalassionema sp.为主；(4)血小板之间以忽略毛藻（Chaetoceros neglected）为主的间质群落。这些群落的物种组成、分布和演替与硅酸盐浓度、孔隙空间、成冰过程的变化以及部分细胞附着在冰片上的能力有关。血小板层群落的存在可能对古冰川学有影响
Abstract Changes in the taxonomic composition of diatoms in fast ice as well as in the underlying platelet layer were followed from June to December 1995 in Atka Bay Antarctica. Four communities were clearly distinguished: (1) an interior community dominated by flagellates in spring; (2) a bottom community dominated by a small form of Fragilariopsis cylindrus; (3) a platelet-ice layer dominated by Amphiprora Kufferathii and Thalassionema sp. growing attached to the ice platelets; and (4) an interstitial community dominated by Chaetoceros neglectus growing in the water between the platelets. Species composition distribution and succession in these communities were related to changes in silicate concentration, pore space and ice-formation processes and the ability of some cells to grow attached to ice platelets. The presence of the platelet-layer communities may have implications for paleoglaciology