Bacterial standing stock and production and their relation to phytoplankton in the Southern Ocean

Lochte, Karin; Bjørnsen, Peter Koefoed; Giesenhagen, Hanna C.; Weber, Anke

doi:10.1016/s0967-0645(96)00081-1

Cited by 75 publications

(48 citation statements)

References 35 publications

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“…These values were rather high compared to the ratios reported from similar temperature gradients in natural environments, e.g. 12 to 22% in gradients of the Southern Atlantic (Lochte et al 1997), and the even lower ratios determined by Hoppe et al (2002) along a meridional Atlantic transect. Very low values of the ratio (1 to 10%), accompanied by a weak coupling between PP and BSP, were measured by Duarte et al (2005), who studied in situ mesocosms filled with cold Antarctic water.…”

Section: Temporal Succession Patterns Of Phytoplankton and Bacteriacontrasting

confidence: 57%

Climate warming in winter affects the coupling between phytoplankton and bacteria during the spring bloom: a mesocosm study

Höppe¹,

Breithaupt²,

Walther³

et al. 2008

Aquat. Microb. Ecol.

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Section: Temporal Succession Patterns Of Phytoplankton and Bacteriacontrasting

confidence: 57%

Climate warming in winter affects the coupling between phytoplankton and bacteria during the spring bloom: a mesocosm study

Höppe¹,

Breithaupt²,

Walther³

et al. 2008

Aquat. Microb. Ecol.

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“…Chlorophyll a (Chl a) concentrations as high as 50 µg l −1 have been recorded off the West Antarctic Peninsula (WAP), although maximum Chl a concentrations off East Antarctica are usually an order of magnitude less (Nelson et al, 1987;Smith and Gordon, 1997;Wright and van den Enden, 2000;Garibotti et al, 2003;Wright et al, 2010;Goldman et al, 2015). The majority of phytoplankton production in the SO is grazed by microheterotrophs or consumed and remineralized by bacteria (Lochte et al, 1997;Christaki et al, 2014). Production that escapes these fates sinks to depth, often in the form of dead cells, aggregates of biogenic material (marine snow), or fecal pellets, sequestering carbon in the deep ocean.…”

Section: Introductionmentioning

confidence: 99%

Southern Ocean Phytoplankton in a Changing Climate

2017

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Phytoplankton are the base of the Antarctic food web, sustain the wealth and diversity of life for which Antarctica is renowned, and play a critical role in biogeochemical cycles that mediate global climate. Over the vast expanse of the Southern Ocean (SO), the climate is variously predicted to experience increased warming, strengthening wind, acidification, shallowing mixed layer depths, increased light (and UV), changes in upwelling and nutrient replenishment, declining sea ice, reduced salinity, and the southward migration of ocean fronts. These changes are expected to alter the structure and function of phytoplankton communities in the SO. The diverse environments contained within the vast expanse of the SO will be impacted differently by climate change; causing the identity and the magnitude of environmental factors driving biotic change to vary within and among bioregions. Predicting the net effect of multiple climate-induced stressors over a range of environments is complex. Yet understanding the response of SO phytoplankton to climate change is vital if we are to predict the future state/s of the ecosystem, estimate the impacts on fisheries and endangered species, and accurately predict the effects of physical and biotic change in the SO on global climate. This review looks at the major environmental factors that define the structure and function of phytoplankton communities in the SO, examines the forecast changes in the SO environment, predicts the likely effect of these changes on phytoplankton, and considers the ramifications for trophodynamics and feedbacks to global climate change. Predictions strongly suggest that all regions of the SO will experience changes in phytoplankton productivity and community composition with climate change. The nature, and even the sign, of these changes varies within and among regions and will depend upon the magnitude and sequence in which these environmental changes are imposed. It is likely that predicted changes to phytoplankton communities will affect SO biogeochemistry, carbon export, and nutrition for higher trophic levels.

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“…The summer and autumn BP : PP ratios on the outer-shelf of the East China Sea (ECS) ranged from 10 to 30% with higher values (> 20%) in the oligotrophic KC, and a negative relationship of BP : PP ratio vs. PP was observed (Shiah et al 2001). Such a pattern had been recorded previously in the cold Southern Ocean where Trichodesmium has never been reported (Lochte et al 1997) with several possible explanations. These included extremely low exudation rate, low bacterial uptake or conversion of DOM, repression of bacterial metabolism by low temperatures or high grazing pressure.…”

Section: Discussionmentioning

confidence: 55%

Potential Impacts of N2-fixing Trichodesmium on Heterotrophic Bacterioplankton Turnover Rates and Organic Carbon Transfer Efficiency in the Subtropical Oligotrophic Ocean System

Tseng¹,

Lin²,

Chiang³

et al. 2005

Terr. Atmos. Ocean. Sci.

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Bacterial standing stock and production and their relation to phytoplankton in the Southern Ocean

Cited by 75 publications

References 35 publications

Climate warming in winter affects the coupling between phytoplankton and bacteria during the spring bloom: a mesocosm study

Climate warming in winter affects the coupling between phytoplankton and bacteria during the spring bloom: a mesocosm study

Southern Ocean Phytoplankton in a Changing Climate

Potential Impacts of N2-fixing Trichodesmium on Heterotrophic Bacterioplankton Turnover Rates and Organic Carbon Transfer Efficiency in the Subtropical Oligotrophic Ocean System

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