Arid
DOI10.1007/s00300-011-1118-7
Chrysophytes and other protists in High Arctic lakes: molecular gene surveys, pigment signatures and microscopy
Charvet, Sophie1,2; Vincent, Warwick F.1,3; Lovejoy, Connie1,2
通讯作者Charvet, Sophie
来源期刊POLAR BIOLOGY
ISSN0722-4060
EISSN1432-2056
出版年2012
卷号35期号:5页码:733-748
英文摘要

Microscopic analysis of the phytoplankton and other protist communities in High Arctic lakes has shown that they often contain taxa in the Chrysophyceae. Such studies have been increasingly supported by pigment analysis using high-performance liquid chromatography (HPLC) to identify the major algal groups. However, the use of 18S rRNA gene surveys in other systems indicates that many protists, especially small heterotrophs, are underreported or missed by microscopy and HPLC. Here, we investigated the late summer protist community structure of three contrasting lakes in High Arctic polar desert catchments (Char Lake at 74A degrees 42’ N, Lake A at 83A degrees 00’ N and Ward Hunt Lake at 83A degrees 05’ N) with a combination of microscopy, pigment analysis and small subunit 18S ribosomal RNA gene surveys. All three methods showed that chrysophytes were well represented, accounting for 50-70% of total protist community biomass and 25-50% of total 18S rRNA gene sequences. HPLC analysis supported these observations by showing the ubiquitous presence of chrysophyte pigments. The clone libraries revealed a greater contribution of heterotrophs to the protist communities than suggested by microscopy. The flagellate Telonema and ciliates were common in all three lakes, and one fungal sequence was recovered from Char Lake. The approaches yielded complementary information about the protist community structure in the three lakes and underscored the importance of chrysophytes, suggesting that they are well adapted to cope with the low nutrient supply and strong seasonality that characterize the High Arctic environment.


英文关键词Chrysophytes Heterotrophic protists Arctic lakes Gene survey Mixotrophs
类型Article
语种英语
国家Canada
收录类别SCI-E
WOS记录号WOS:000302480600009
WOS关键词SSU RIBOSOMAL-RNA ; MICROBIAL EUKARYOTES ; PLANKTON DYNAMICS ; CHAR-LAKE ; DIVERSITY ; PHYTOPLANKTON ; PCR ; NANOPLANKTON ; COMMUNITIES ; SEASONALITY
WOS类目Biodiversity Conservation ; Ecology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174589
作者单位1.Univ Laval, Dept Biol, Quebec City, PQ G1V 0A6, Canada;
2.Univ Laval, Inst Biol Integrat & Syst IBIS, Quebec City, PQ G1V 0A6, Canada;
3.Univ Laval, Ctr Etud Nord CEN, Quebec City, PQ G1V 0A6, Canada
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GB/T 7714
Charvet, Sophie,Vincent, Warwick F.,Lovejoy, Connie. Chrysophytes and other protists in High Arctic lakes: molecular gene surveys, pigment signatures and microscopy[J],2012,35(5):733-748.
APA Charvet, Sophie,Vincent, Warwick F.,&Lovejoy, Connie.(2012).Chrysophytes and other protists in High Arctic lakes: molecular gene surveys, pigment signatures and microscopy.POLAR BIOLOGY,35(5),733-748.
MLA Charvet, Sophie,et al."Chrysophytes and other protists in High Arctic lakes: molecular gene surveys, pigment signatures and microscopy".POLAR BIOLOGY 35.5(2012):733-748.
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