scholarly journals Methods for measuring benthic nutrient flux on the California Margin: Comparing shipboard core incubations to in situ lander results

2004 ◽  
Vol 2 (6) ◽  
pp. 146-159 ◽  
Author(s):  
Douglas E. Hammond ◽  
Kathleen M. Cummins ◽  
James McManus ◽  
William M. Berelson ◽  
Gerry Smith ◽  
...  
Keyword(s):  
Nutrient Flux ◽  
Benthic Nutrient Flux

scholarly journals Benthic Nutrient Flux in a Small Estuary in Northwestern Florida (USA)

2006 ◽  
Vol 18 ◽  
Author(s):  
Guy T. DiDonato ◽  
Emile M. Lores ◽  
Michael C. Murrell ◽  
Lisa M. Smith ◽  
Jane M. Caffrey
Keyword(s):  
Nutrient Flux ◽  
Benthic Nutrient Flux

Benthic nutrient flux in a shallow coastal environment

Oecologia ◽  
1983 ◽  
Vol 60 (3) ◽  
pp. 306-312 ◽  
Author(s):  
A. J. Pomroy ◽  
I. R. Joint ◽  
K. R. Clarke
Keyword(s):  
Nutrient Flux ◽  
Coastal Environment ◽  
Benthic Nutrient Flux ◽  
Shallow Coastal Environment

Enhanced Benthic Nutrient Flux During Monsoon Periods in a Coastal Lake Formed by Tideland Reclamation

2009 ◽  
Vol 32 (6) ◽  
pp. 1165-1175 ◽  
Author(s):  
Seok-Hwi Kim ◽  
Kangjoo Kim ◽  
Minhyung Lee ◽  
Hwa-Jin Jeong ◽  
Won-Jang Kim ◽  
...  
Keyword(s):  
Nutrient Flux ◽  
Coastal Lake ◽  
Benthic Nutrient Flux ◽  
Tideland Reclamation

scholarly journals A Study on the Measurement Method for Benthic Nutrient Flux in Freshwater Sediments

2017 ◽  
Vol 39 (5) ◽  
pp. 288-302 ◽  
Author(s):  
Kyung Hee Kim ◽  
Sung-Han Kim ◽  
Dal Rae Jin ◽  
In Ae Huh ◽  
Jung-Ho Hyun
Keyword(s):  
Measurement Method ◽  
Nutrient Flux ◽  
Freshwater Sediments ◽  
Benthic Nutrient Flux

scholarly journals Assessment of Terrigenous Nutrient Loading to Coastal Ecosystems along a Human Land-Use Gradient, Tutuila, American Samoa

Hydrology ◽  
2019 ◽  
Vol 6 (1) ◽  
pp. 18 ◽  
Author(s):  
Christopher Shuler ◽  
Daniel Amato ◽  
Veronica Veronica Gibson ◽  
Lydia Baker ◽  
Ashley Olguin ◽  
...  
Keyword(s):  
Land Use ◽  
Nutrient Loading ◽  
Water Discharge ◽  
Nitrogen Isotope ◽  
Nutrient Flux ◽  
American Samoa ◽  
Nutrient Concentrations ◽  
Human Land Use ◽  
The Impact

Anthropogenic nutrient loading is well recognized as a stressor to coastal ecosystem health. However, resource managers are often focused on addressing point source or surface water discharge, whereas the impact of submarine groundwater discharge (SGD) as a nutrient vector is often unappreciated. This study examines connections between land use and nutrient loading through comparison of four watersheds and embayments spanning a gradient of human use impact on Tutuila, a high tropical oceanic island in American Samoa. In each study location, coastal radon-222 measurements, dissolved nutrient concentrations, and nitrogen isotope values (δ15N) in water and in situ macroalgal tissue were used to explore SGD and baseflow derived nutrient impacts, and to determine probable nutrient sources. In addition to sampling in situ macroalgae, pre-treated macroalgal specimens were deployed throughout each embayment to uptake ambient nutrients and provide a standardized assessment of differences between locations. Results show SGD-derived nutrient flux was more significant than baseflow nutrient flux in all watersheds, and δ15N values in water and algae suggested wastewater or manure are likely sources of elevated nutrient levels. While nutrient loading correlated well with expected anthropogenic impact, other factors such as differences in hydrogeology, distribution of development, and wastewater infrastructure also likely play a role in the visibility of impacts in each watershed.

The potential role of benthic nutrient flux in support of Karenia blooms in west Florida (USA) estuaries and the nearshore Gulf of Mexico

Harmful Algae ◽  
2014 ◽  
Vol 38 ◽  
pp. 30-39 ◽  
Author(s):  
L. Kellie Dixon ◽  
Philip J. Murphy ◽  
Nichole M. Becker ◽  
Camia M. Charniga
Keyword(s):  
Gulf Of Mexico ◽  
Potential Role ◽  
Nutrient Flux ◽  
Benthic Nutrient Flux

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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