Rapid and early export of Phaeocystis antarctica blooms in the Ross Sea, Antarctica

  title={Rapid and early export of Phaeocystis antarctica blooms in the Ross Sea, Antarctica},
  author={Giacomo R. DiTullio and Jacqueline M. Grebmeier and Kevin Robert Arrigo and Michael P. Lizotte and Dale H. Robinson and Amy Leventer and James P. Barry and Michael VanWoert and Robert B. Dunbar},
The Southern Ocean is very important for the potential sequestration of carbon dioxide in the oceans and is expected to be vulnerable to changes in carbon export forced by anthropogenic climate warming. Annual phytoplankton blooms in seasonal ice zones are highly productive and are thought to contribute significantly to pCO2 drawdown in the Southern Ocean. Diatoms are assumed to be the most important phytoplankton class with respect to export production in the Southern Ocean; however, the… 

Net community production and carbon export during the late summer in the Ross Sea, Antarctica

The phytoplankton bloom in the Ross Sea is the largest in spatial extent and one of the most productive in Antarctica, yet the fate of the summer bloom remains poorly understood. Here we present

Incorporating Phaeocystis into a Southern Ocean ecosystem model

Phaeocystis antarctica is an important phytoplankton species in the Southern Ocean. We incorporated P. antarctica into the biogeochemical elemental cycling ocean model to study Southern Ocean

Distribution of Phaeocystis antarctica-dominated sea ice algal communities and their potential to seed phytoplankton across the western Antarctic Peninsula in spring

The western Antarctic Peninsula has experienced extreme changes in the timing of sea ice melt and freeze up, shortening the duration of the seasonal sea ice cycle. While previous research

Hydrography and Phytoplankton Distribution in the Amundsen and Ross Seas

The phytoplankton of the Ross Sea have been intensively studied during the last decade, as opposed to the Amundsen Sea, where virtually nothing is known about phytoplankton taxonomy and distribution.

Exploring the use of compound-specific carbon isotopes as a palaeoproductivity proxy off the coast of Adélie Land, East Antarctica

Abstract. The Antarctic coastal zone is an area of high primary productivity, particularly within coastal polynyas, where large phytoplankton blooms and drawdown of CO2 occur. Reconstruction of

Phytoplankton blooms in the Ross Sea, Antarctica: Interannual variability in magnitude, temporal patterns, and composition

[1] The continental shelf of the Ross Sea, Antarctica, is a unique region within the Southern Ocean. Phytoplankton growth is believed to be seasonally limited, first in austral spring by irradiance,

A carbon budget for the Amundsen Sea Polynya, Antarctica: Estimating net community production and export in a highly productive polar ecosystem

Polynyas, or recurring areas of seasonally open water surrounded by sea ice, are foci for energy and material transfer between the atmosphere and the polar ocean. They are also climate sensitive,

Phaeocystis antarctica blooms strongly influence bacterial community structures in the Amundsen Sea polynya

This work has identified the bacterial communities that accompanied a Phaeocystis bloom in the Amundsen Sea polynya during the austral summers of 2007–2008 and 2010–2011 and identified several taxa that were preferentially associated with Phaecystis colonies, indicative of a distinct role in Phaeocytes bloom ecology.

Phytoplankton blooms during austral summer in the Ross Sea, Antarctica: Driving factors and trophic implications

The comparison of conditions observed during summer 2014 and those reported for previous years reveal considerably different ecological assets that might be the result of current climate change, and suggests that further changes can be expected in the future, even at larger oceanic scales.



Organic carbon partitioning during spring phytoplankton blooms in the Ross Sea polynya and the Sargasso Sea

In this study we evaluate the partitioning of organic carbon between the particulate and dissolved pools during spring phytoplankton blooms in the Ross Sea, Antarctica, and the Sargasso Sea. As part

Phytoplankton taxonomic variability in nutrient utilization and primary production in the Ross Sea

Patterns of nutrient utilization and primary productivity (PP) in late austral spring and early summer in the southwestern Ross Sea were characterized with respect to phytoplankton taxonomic

Hyperproductivity of the Ross Sea (Antarctica) polynya during austral spring

Although satellite data of surface layer pigments have suggested that the daily productivity in the Ross Sea is among the largest found in any marine system, no modern oceanographic cruise has

Phytoplankton community structure and the drawdown of nutrients and CO2 in the southern ocean

Data from recent oceanographic cruises show that phytoplankton community structure in the Ross Sea is related to mixed layer depth, and the capacity of the biological community to draw down atmospheric CO2 and transport it to the deep ocean could diminish dramatically if predicted increases in upper ocean stratification due to climate warming should occur.

Mass sedimentation of Phaeocystis pouchetii in the Barents Sea

Evidence presented in this study implies that the zooplankton community of the Barents Sea was not able to control this phytoplankon spring bloom, and degradation of P. pouchetii derived derirus at depths less than 100 m greatly diminishes the likely significance of the species in processes such as the carbon flux to the deep ocean and sequestering of COj.

Silicon-isotope composition of diatoms as an indicator of past oceanic change

Silicon is essential for the growth of diatoms, a group of phytoplankton with opal (amorphous hydrated silica) shells. Diatoms largely control the cycling of silicon in the ocean and, conversely,

Ice-core record of oceanic emissions of dimethylsulphide during the last climate cycle

THE Vostok ice core in Antarctica has provided one of the longest climate records, enabling the stable-isotope, major-ion and gas composition of the atmosphere to be reconstructed over many thousands

glacial-interglacial Co2 change : the iron hypothesis

Several explanations for the 200 to 280 ppm glacial/interglacial change in atmospheric CO2 concentrations deal with variations in southern ocean phytoplankton productivity and the related use or

The southern ocean at the Last Glacial Maximum: A strong sink for atmospheric carbon dioxide

Analysis of satellite ocean color, sea surface temperature, and sea ice cover data reveals consistent patterns between biological production, iron availability, and physical forcings in the Southern