登录 | 注册 | 中文  | English  | 用时: 0.42s
元数据
高级检索
首页 > 中国极地考察知识库 > 成果信息库 > 已审查 Phylogenetic diversity of dinoflagellates in polar regions

Phylogenetic diversity of dinoflagellates in polar regions

【标题】Phylogenetic diversity of dinoflagellates in polar regions

【Title】Phylogenetic diversity of dinoflagellates in polar regions

【DOI】10.3724/SP.J.1085.2011. 00035

【作者】 罗纬; 李会荣; 高小艳; 戴聪杰

【Author】 Li Kuairong ; Dai Congjie

【期刊】极地研究

【Journal】

【期刊年份】2011

【卷】22

【期】

【关键词】 bipolar; dinoflagellates; molecular diversity; 18S rRNA

【Keywords】 bipolar; dinoflagellates; molecular diversity; 18S rRNA

【摘要】Because of the limitations of sampling and seasonal study in polar regions, knowledge of dinoflagellate diversity, distribution and ecology are limited. Dinoflagellates have been incidentally reported from polar regions during some seasons and some populations have been reported as components of microalgae. Surveys of molecular diversity link the genotype of dinoflagellates from polar regions with environmental adaptation. In this study, 37 positive clones of dinoflagellates collected from different sites were used for genotype analysis, providing new insights into the biodiversity and distribution of these species based on 18S rRNA sequencing. Diverse genotypes were recorded for the summer season in Kongsfjorden (high Arctic) whilst a single novel genotype of dinoflagellate was recorded from winter samples from the Antarctic Ocean. Data from ice cores suggests that this single dinoflagellate genotype was adapted to extreme cold and clone library screening found that it was occasionally the only microbial eukaryotic genotype found in winter ice cores. The findings of this study could improve our understanding of the diverse dinoflagellate genotypes occurring in these perennially cold microbial ecosystems.

【Abstract】Because of the limitations of sampling and seasonal study in polar regions, knowledge of dinoflagellate diversity, distribution and ecology are limited. Dinoflagellates have been incidentally reported from polar regions during some seasons and some populations have been reported as components of microalgae. Surveys of molecular diversity link the genotype of dinoflagellates from polar regions with environmental adaptation. In this study, 37 positive clones of dinoflagellates collected from different sites were used for genotype analysis, providing new insights into the biodiversity and distribution of these species based on 18S rRNA sequencing. Diverse genotypes were recorded for the summer season in Kongsfjorden (high Arctic) whilst a single novel genotype of dinoflagellate was recorded from winter samples from the Antarctic Ocean. Data from ice cores suggests that this single dinoflagellate genotype was adapted to extreme cold and clone library screening found that it was occasionally the only microbial eukaryotic genotype found in winter ice cores. The findings of this study could improve our understanding of the diverse dinoflagellate genotypes occurring in these perennially cold microbial ecosystems.

【基金/项目】 北极高纬近岸海域超微型浮游真核生物类群及其生态地位研究 ; 南极普里兹湾海冰中氨氧化细菌、氨氧化古菌多样性及其生态功能分析

【下载】 PDF(3.4 MB)