Role of biogenic silica in the removal of iron from the Antarctic seas

被引：46

作者：

Ingall, Ellery D. ^{[1
]}

Diaz, Julia M. ^{[1
]}

Longo, Amelia F. ^{[1
]}

Oakes, Michelle ^{[1
]}

Finney, Lydia ^{[2
]}

Vogt, Stefan ^{[2
]}

Lai, Barry ^{[2
]}

Yager, Patricia L. ^{[3
]}

Twining, Benjamin S. ^{[4
]}

Brandes, Jay A. ^{[5
]}

机构：

[1] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA

[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[3] Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA

[4] Bigelow Lab Ocean Sci, East Boothbay, ME 04544 USA

[5] Skidaway Inst Oceanog, Savannah, GA 31411 USA

来源：

NATURE COMMUNICATIONS | 2013年 / 4卷

基金：

美国国家科学基金会;

关键词：

DIATOM THALASSIOSIRA-PSEUDONANA; SOUTHERN-OCEAN; ROSS-SEA; DEPOSITION; CARBON; WATERS; ZINC; FERTILIZATION; SPECTROSCOPY; SOLUBILITY;

D O I：

10.1038/ncomms2981

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Iron has a key role in controlling biological production in the Southern Ocean, yet the mechanisms regulating iron availability in this and other ocean regions are not completely understood. Here, based on analysis of living phytoplankton in the coastal seas of West Antarctica, we present a new pathway for iron removal from marine systems involving structural incorporation of reduced, organic iron into biogenic silica. Export of iron incorporated into biogenic silica may represent a substantial unaccounted loss of iron from marine systems. For example, in the Ross Sea, burial of iron incorporated into biogenic silica is conservatively estimated as 11 mu mol m(-2) per year, which is in the same range as the major bioavailable iron inputs to this region. As a major sink of bioavailable iron, incorporation of iron into biogenic silica may shift microbial population structure towards taxa with relatively lower iron requirements, and may reduce ecosystem productivity and associated carbon sequestration.

引用

页数：6

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