Carbon in catchments: connecting terrestrial carbon losses with aquatic metabolism

@article{Cole2001CarbonIC,
  title={Carbon in catchments: connecting terrestrial carbon losses with aquatic metabolism},
  author={Jonathan J. Cole and Nina F. Caraco},
  journal={Marine and Freshwater Research},
  year={2001},
  volume={52},
  pages={101-110}
}
  • J. Cole, N. Caraco
  • Published 12 January 2001
  • Environmental Science
  • Marine and Freshwater Research
For a majority of aquatic ecosystems, respiration ( R ) exceeds autochthonous gross primary production (GPP). These systems have negative net ecosystem production ((NEP) = (GPP) - R ) and ratios of (GPP)/ R of <1. This net heterotrophy can be sustained only if aquatic respiration is subsidized by organic inputs from the catchment. Such subsidies imply that organic materials that escaped decomposition in the terrestrial environment must become susceptible to decomposition in the linked aquatic… 

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References

SHOWING 1-10 OF 85 REFERENCES
Metabolism and organic carbon fluxes in the tidal freshwater Hudson River
We summarize rates of metabolism and major sources and sinks of organic carbon in the 148-k long, tidally influenced, freshwater Hudson River. The river is strongly heterotrophic, with respiration
Ecosystem respiration and organic carbon processing in a large, tidally influenced river: the Hudson River
We estimated whole-ecosystem rates of respiration over a 40-km stretch of the tidally influenced freshwater Hudson River every 2 to 3 weeks from May through November. We measured in situ
Dissolved Organic Carbon Cycling in Forested Watersheds: A Carbon Isotope Approach
Dissolved organic carbon (DOC) is important in the acid-base chemistry of acid-sensitive freshwater systems; in the complexation, mobility, persistence, and toxicity of metals and other pollutants;
Sources of Dissolved Organic Carbon Supporting Planktonic Bacterial Production in the Tidal Freshwater
Planktonic bacterial production in the tidal freshwater Hudson River is a major component of secondary productivity and is uncoupled from planktonic primary productivity. There are several major
Original Articles: Sources of Dissolved Organic Carbon Supporting Planktonic Bacterial Production in the Tidal Freshwater Hudson River
TLDR
The absence of large differences in bacterial productivity among sources suggests that growth is supported by a wide range of DOC, and the relative importance of the sources is probably related to the quantitative differences in inputs.
Weak coupling of bacterial and algal production in a heterotrophic ecosystem: The Hudson River estuary
TLDR
Annual average bacterial abundances from different stations were not significantly correlated with algal standing stocks, and bacterial production was only weakly related to rates of primary production, indicating that much of the bacterial secondary production in this portion of the river must be supported by nonphytoplanktonic organic C.
Riverine export of aged terrestrial organic matter to the North Atlantic Ocean
TLDR
It is found that much of the young dissolved organic carbon can be selectively degraded over the residence times of river and coastal waters, leaving an even older and more refractory component for oceanic export.
Biogeochemistry of carbon in the Amazon River
Depth-integrated, discharge-weighted water samples were collected over 1,800km ofthe Amazon River on eight cruises at different stages of the hydrograph, 1982-1984. Fine (FPOC, 163 pm) and coarse
The role of gas exchange in the inorganic carbon, oxygen, and 222Rn budgets of the Amazon River'
Dissolved oxygen, ***Rn, pC02, alkalinity, respiration rate, and discharge have been measured at eight mainstem and seven tributary stations during February-March 1984 in a 1,700-km stretch of the
REGULATION OF BACTERIAL GROWTH EFFICIENCY IN A LARGE TURBID ESTUARY
TLDR
The relationships between BGE and BP and BR are used to calculate realistic ambient estimates of BGE from short-term measurements of BP, and pelagic BR in the tidal, freshwater Hudson River is estimated to be between 176 and 229 g C m-' yr-'.
...
...