Phaeocystis antarctica unusual summer bloom in stratified antarctic coastal waters (Terra Nova Bay, Ross Sea)
Phaeocystis antarctica unusual summer bloom in stratified antarctic coastal waters (Terra Nova Bay, Ross Sea)
复制标题
南极棕囊藻在夏季分层的南极沿海水域（特拉诺瓦湾、罗斯海）异常盛开
DOI：
10.1016/j.marenvres.2019.05.012
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发表时间：
2019
影响因子：
3.3
通讯作者：
DiTullio, Giacomo R.
中科院分区：
文献类型：
--
作者：
Mangoni, Olga;Saggiomo, Maria;Bolinesi, Francesco;Castellano, Michela;Povero, Paolo;Saggiomo, Vincenzo;DiTullio, Giacomo R.
本研究采用多参数相关分析方法，对罗斯海南极特别保护区Terra Nova湾（TNB）分层沃茨发生的aPhaeocystisanaustricasummer水华进行了探讨。许多以前的研究已经强调，水柱分层通常有利于硅藻优势相比，殖民haptophyteP。Anaeritica，在罗斯海，这种相关性经常被用来解释TNB中硅藻的历史优势。2009年12月31日至2010年1月13日，对近岸沃茨浮游植物群落进行了3次采样。南极洲细胞丰度分析表明，P.在25 m以上的光层中，无光细胞占总细胞数的79%，而在下透光层中，无光细胞占总细胞数的93%。同样，叶绿素a和六角岩藻色素的比例之间观察到了很强的相关性，证实了显微镜分析。最近的研究表明，铁可以触发殖民P。防腐蚀的窗帘。本文以Hex：Chl-c3为铁限制指标，研究了铁限制对小麦生长发育的影响。anaitica，我们推测，异常高的铁通量负责colonialP的不寻常的水华。在TNB中观察到抗肿瘤作用。
This study focuses on the potential explanations for aPhaeocystisantarcticasummer bloom occurred in stratified waters of Terra Nova Bay (TNB) - which is part of the Antarctic Special Protected Area (n.161) in the Ross Sea - trough a multi-parameter correlative approach. Many previous studies have highlighted that water column stratification typically favors diatom dominance compared to the colonial haptophyteP. antarctica,in the Ross Sea, and this correlation has often been used to explain the historic dominance of diatoms in TNB.To explore the spatial and temporal progression ofP. antarcticabloom in coastal waters, four stations were sampled three times each between December 31, 2009 and January 13, 2010.Taxonomic and pigment composition of phytoplankton communities, macro-nutrient concentrations and various different indices, all indicated the relative dominance ofP. antarctica. Cell abundances revealed thatP. antarcticacontributed 79% of total cell counts in the upper 25 m and 93% in the lower photic zone. Similarly, a strong correlation was observed between Chl-a and the Hex:Fuco pigment ratio, corroborating the microscopic analyses. Recent studies have shown that iron can trigger colonialP. antarcticablooms. Based on the Hex:Chl-c3proxy for iron limitation inP. antarctica, we hypothesize that anomalously higher iron fluxes were responsible for the unusual bloom of colonialP. antarcticaobserved in TNB.