Phytoplankton community structure in a high-nutrient, low-chlorophyll region of the eastern Pacific Subantarctic region during winter-mixed and summer-stratified conditions

被引：13

作者：

Bouman, Heather A. ^{[1
,2
,3
]}

Lepere, Cecile ^{[4
]}

Scanlan, David J. ^{[4
]}

Ulloa, Osvaldo ^{[2
,3
]}

机构：

[1] Dept Earth Sci, Oxford OX1 3AN, England

[2] Univ Concepcion, Dept Oceanog, Concepcion, Chile

[3] Univ Concepcion, Ctr Invest Oceanog COPAS, Concepcion, Chile

[4] Univ Warwick, Sch Life Sci, Coventry CV4 7AL, W Midlands, England

来源：

DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS | 2012年 / 69卷

关键词：

Picophytoplankton; Community structure; Subantarctic; Southern Ocean; HNLC; HPLC pigments; Molecular probes; SOUTHERN-OCEAN; ATLANTIC SECTOR; EUKARYOTIC ULTRAPHYTOPLANKTON; DISTRIBUTION PATTERNS; PIGMENT; DIVERSITY; SIZE; IRON; ABUNDANCE; WATERS;

D O I：

10.1016/j.dsr.2012.04.008

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

Phytoplankton community structure was analysed in the Subantarctic sector of the eastern South Pacific, a high-nutrient, low-chlorophyll (HNLC) region, during a period of deep vertical mixing (austral winter Aug-Oct, 2005) when Antarctic Intermediate Water (AAIW) gets formed, and during a period of water-column stratification characterised by shallow mixed layers (austral summer Feb-Mar, 2006). We examined both the entire phytoplankton assemblage through the use of diagnostic pigments and also the picophytoplankton fraction (< 3 mu m) through the use of class-specific molecular probes and flow cytometry. Both the pigment and molecular data reveal a dominance of prymnesiophytes during both the winter-mixed and summer-stratified periods. Chrysophytes and their diagnostic pigments were also present throughout most of the study region. Flow cytometric analysis revealed that the contribution of photosynthetic picoeukaryotes (PPEs) to total picophytoplankton (PPEs+picocyanobacteria) abundances increases systematically with increasing latitude and decreasing temperature, highlighting the importance of PPEs in the Southern Ocean. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：1 / 11

页数：11

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