+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Nutrient inputs to the coastal ocean through submarine groundwater discharge: controls and potential impact

Nutrient inputs to the coastal ocean through submarine groundwater discharge: controls and potential impact

Journal of Hydrology Amsterdam 295(1/4): 64-86

Nutrient input through submarine groundwater discharge (SGD) rivals river inputs in certain regions and may play a significant role in nutrient cycling and primary productivity in the coastal ocean. In this paper, we review the key factors determining the fluxes of nitrogen (N) and phosphorus (P) associated with SGD and present a compilation of measured rates. We show that, in particular, the water residence time and the redox conditions in coastal aquifers and sediments determine fluxes and ratios of N and P in SGD. In many coastal groundwater systems, and especially in contaminated aquifers, N/P ratios exceed those in river water and are higher than the Redfield ratio. Thus, anthropogenically driven increases in SGD of nutrients have the potential to drive the N-limited coastal primary production to P-limitation. River input of N and P to the coastal ocean has doubled over the past 50 yr. Results of a dynamic biogeochemical model for the C, N and P cycles of the global proximal coastal ocean (which includes large bays, the open water part of estuaries, deltas, inland seas and salt marshes), suggest that this has led to a factor 2 increase in primary production and biomass and a decline in water column N/P ratios, i.e. the system has become more N-limiting. With the same model, we show that an increase of SGD-N fluxes to approximately 0.7-1.1 Tmol yr(-1) (with a SGD N/P ratio of 100; equal to approximately 45-70% of pre-human riverine N-inputs) is required to drive the coastal ocean to P-limitation within the next 50 yr.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 004251990

Download citation: RISBibTeXText

DOI: 10.1016/j.jhydrol.2004.02.018

Related references

Nutrient ingredient analysis on four species of land snails in Yunnan Province. Chinese Journal of Zoology 43(2): 106-110, 2008

Chemical input and I-V output: stepwise chemical information processing in dye-sensitized solar cells. Physical Chemistry Chemical Physics 14(46): 16014-16022, 2012

Nutrient inputs from submarine groundwater discharge (SGD) in Masan Bay, an embayment surrounded by heavily industrialized cities, Korea. Science of the Total Environment 407(9): 3181-3188, 2009

Nutrient ingestion increased mTOR signaling, but not hVps34 activity in human skeletal muscle after sprint exercise. Physiological Reports 1(5): E00076, 2013

The role of studying behavior in the conservation of chimpanzees and gorillas. Conservation Behaviorist ; 4(1): 13-15, 2006

Improving our understanding of gas hydrate formation processes; the importance of multi-technique approaches. Special Publication - Royal Society of Chemistry 311: 59-71, 2007

Submarine ground water discharge at Crescent Beach Spring; potential flow paths and sources of water. Abstracts with Programs - Geological Society of America 32(2): 77, 2000

Submandible angle in nonobese patients with difficult tracheal intubation. Anesthesiology 106(5): 916-923, 2007

Chesapeake Bay sediment monitoring for water quality model development. Pages 283-291:, 1988

The role of submarine groundwater discharge in the water balance of Australia. IAHS-AISH Publication 142(1): 209-219, 1983

Bedrock control of late Wisconsinan ice retreatal positions and meltwater channels near Hamilton, New York. Abstracts with Programs - Geological Society of America 5(2): 144, 1973

Submarine groundwater discharge SGD into the Yellow Sea revealed by super 228 Ra and super 226 Ra isotopes; implications for global silicate fluxes. Earth and Planetary Science Letters 237(1-2): 156-166, 2005

Land of opportunities. African Mining 13.5, 2008

Geological control on the Oslawa River meander at Duszatyn, western Bieszczady Mountains, Polish Outer Carpathians. Annales Societatis Geologorum Poloniae 74(3): 325-338, 2004

Toward an ecosystem approach to fisheries in the Mediterranean Sea Multi-gear/multi-species implications from an ecosystem model of the Greek Ionian Sea. Journal of Marine Systems 113-114: 13-28, 2013