scholarly journals Dynamics and sources of dissolved organic carbon during phytoplankton bloom in hypereutrophic Lake Taihu (China)

Limnologica ◽  
2015 ◽  
Vol 54 ◽  
pp. 5-13 ◽  
Author(s):  
Linlin Ye ◽  
Xiaodong Wu ◽  
Bo Liu ◽  
Dezhi Yan ◽  
Fanxiang Kong
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Phytoplankton Bloom ◽  
Lake Taihu

High turnover rates of dissolved organic carbon during a spring phytoplankton bloom

Nature ◽  
1991 ◽  
Vol 352 (6336) ◽  
pp. 612-614 ◽  
Author(s):  
David L. Kirchman ◽  
Yoshimi Suzuki ◽  
Christopher Garside ◽  
Hugh W. Ducklow
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Phytoplankton Bloom ◽  
Turnover Rates ◽  
High Turnover ◽  
Spring Phytoplankton Bloom

Synchronous shifts in dissolved organic carbon bioavailability and bacterial community responses over the course of an upwelling-driven phytoplankton bloom

2015 ◽  
Vol 60 (2) ◽  
pp. 657-677 ◽  
Author(s):  
Emma K. Wear ◽  
Craig A. Carlson ◽  
Anna K. James ◽  
Mark A. Brzezinski ◽  
Laura A. Windecker ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Bacterial Community ◽  
Dissolved Organic Carbon ◽  
Phytoplankton Bloom ◽  
Community Responses

scholarly journals The Seasonal Flux and Fate of Dissolved Organic Carbon Through Bacterioplankton in the Western North Atlantic

2021 ◽  
Vol 12 ◽  
Author(s):  
Nicholas Baetge ◽  
Michael J. Behrenfeld ◽  
James Fox ◽  
Kimberly H. Halsey ◽  
Kristina D. A. Mojica ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
North Atlantic ◽  
Phytoplankton Bloom ◽  
North Atlantic Ocean ◽  
Net Primary Production ◽  
Deep Ocean ◽  
Carbon Demand ◽  
Carbon Pump ◽  
Biological Carbon Pump

The oceans teem with heterotrophic bacterioplankton that play an appreciable role in the uptake of dissolved organic carbon (DOC) derived from phytoplankton net primary production (NPP). As such, bacterioplankton carbon demand (BCD), or gross heterotrophic production, represents a major carbon pathway that influences the seasonal accumulation of DOC in the surface ocean and, subsequently, the potential vertical or horizontal export of seasonally accumulated DOC. Here, we examine the contributions of bacterioplankton and DOM to ecological and biogeochemical carbon flow pathways, including those of the microbial loop and the biological carbon pump, in the Western North Atlantic Ocean (∼39–54°N along ∼40°W) over a composite annual phytoplankton bloom cycle. Combining field observations with data collected from corresponding DOC remineralization experiments, we estimate the efficiency at which bacterioplankton utilize DOC, demonstrate seasonality in the fraction of NPP that supports BCD, and provide evidence for shifts in the bioavailability and persistence of the seasonally accumulated DOC. Our results indicate that while the portion of DOC flux through bacterioplankton relative to NPP increased as seasons transitioned from high to low productivity, there was a fraction of the DOM production that accumulated and persisted. This persistent DOM is potentially an important pool of organic carbon available for export to the deep ocean via convective mixing, thus representing an important export term of the biological carbon pump.

Dissolved organic carbon and relationship with bacterioplankton community composition in 3 lake regions of Lake Taihu, China

2014 ◽  
Vol 60 (10) ◽  
pp. 669-680 ◽  
Author(s):  
Xinghong Pang ◽  
Hong Shen ◽  
Yuan Niu ◽  
Xiaoxue Sun ◽  
Jun Chen ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Community Composition ◽  
Lake Taihu ◽  
Eutrophic Lakes ◽  
Bacterioplankton Community ◽  
Doc Concentration ◽  
Lake Center ◽  
Meiliang Bay ◽  
The Relationship

To clarify the relationships between dissolved organic carbon (DOC) and bacterioplankton community composition (BCC), a 1-year survey (June 2009 – May 2010) was conducted in 3 regions of Lake Taihu (Meiliang Bay, Lake Center, and Eastern Taihu), China. Polymerase chain reaction – denaturing gradient gel electrophoresis was used to analyze the composition and heterogeneity of the bacterioplankton community. Canonical correspondence analysis was used to explore the relationships between DOC concentration and BCC. We found a significant negative correlation between DOC concentration and bacterioplankton community diversity (as measured by the Shannon–Wiener index (H′)). The results show that spatial variation in the bacterioplankton population was stronger than the seasonal variation and that DOC concentration influences BCC in Lake Taihu. DOC concentration, followed by macrophyte biomass, water turbidity, and phytoplankton biomass were the most influential factors that account for BCC changes in Lake Taihu. More detailed studies on the relationship between DOC concentration and BCC should focus on differences in DOC concentrations and quality among these lake regions. DOC had a significant impact on BCC in Meiliang Bay. The relationship between DOC and BCC in the 2 other regions studied (Lake Center and Eastern Taihu) was weaker. The results of this study add to our understanding of the BCC in eutrophic lakes, especially regarding the role of the microbial loop in lake ecosystems.

scholarly journals Dynamics of dissolved organic carbon after a cyanobacterial bloom in hypereutrophic Lake Taihu (China)

Limnologica ◽  
2011 ◽  
Vol 41 (4) ◽  
pp. 382-388 ◽  
Author(s):  
Linlin Ye ◽  
Xiao Shi ◽  
Xiaodong Wu ◽  
Min Zhang ◽  
Yang Yu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Lake Taihu ◽  
Cyanobacterial Bloom

Dissolved organic carbon as a component of the biological pump in the North Atlantic Ocean

1995 ◽  
Vol 348 (1324) ◽  
pp. 161-167 ◽  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
North Atlantic ◽  
Phytoplankton Bloom ◽  
Classical Model ◽  
Global Ocean ◽  
Data Set ◽  
The North ◽  
Biogenic Carbon ◽  
The North Atlantic

The North Atlantic is characterized by strong seasonality in mixed layer depths, resulting in winter recharge of surface layer nutrients and the spring phytoplankton bloom. This is the classical textbook model of seasonal cycles of oceanic biogeochemical processes, but in fact the North Atlantic is the exception rather than the rule. In much of the temperate and subpolar regions of the basin, the vernal accumulation of biomass is accompanied by a marked drawdown of inorganic carbon in the water column and pulses of particle flux to the seafloor. In the classical model, the decline of the C0 2 is balanced by accumulation of biogenic carbon and particle export. The main export mechanisms include sinking of ungrazed but possibly senescent phytoplankton and zooplankton grazing and egestion. Carbon budgets based on observations from the Joint Global Ocean Flux Study North Atlantic Bloom Experiment and Bermuda Atlantic Time Series cannot be closed using the elements of the classical model. That is, the C0 2 drawdown cannot be balanced by biomass accumulation and exports estimated by sediment traps. There are at least three possible routes toward reconciliation: (i) trap estimates are in error and systematically biased; (ii) spatial variability aliasses the observations making budgeting impossible without recourse to coupled three-dimensional models; and/or (iii) the classical model must be abandoned and replaced by a concept in which the accumulation and export of dissolved organic carbon assumes a major role in the North Atlantic carbon balance. At Bermuda, where the most complete data set exists, the weight of the evidence favours the first and third possibilities.

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