Atmospheric Nitrogen And Carbon Exchange In Coastal Ecosystems Tender, USA - 31306660

Procurement Summary

Country : USA

Summary : Atmospheric Nitrogen And Carbon Exchange In Coastal Ecosystems

Deadline : 11 Mar 2019

Other Information

Notice Type : Tender

TOT Ref.No.: 31306660

Document Ref. No. : NRMAC100-19-00338

Competition : ICB

Financier : Self Financed

Purchaser Ownership : -

Tender Value : Refer Document

Purchaser's Detail

Purchaser : DEPARTMENT OF COMMERCE
Contracting Office Address: 1315 East-West Highway
Silver Spring
Maryland 20910
United States

Primary Point of Contact: Barbara G Shifflett,

Management and Program Analyst
USA
Email :barbara.shifflett@noaa.gov

Tender Details

Noaa's atmospheric turbulence and diffusion division office, air resources laboratory, intends to negotiate, on a sole source basis, under authority of far 13.106-1(b)(1), with dr. Nebila lichiheb providing support for atmospheric nitrogen and carbon exchange in coastal ecosystems. Period of performance: march - september of 2019.



The sole source determination is based on the national oceanic & atmospheric administration's (noaa) atmospheric turbulence and diffusion division's requirement for atmospheric nitrogen and carbon exchange in coastal ecosystems.



Coastal wetlands (specifically seagrasses, marshes and mangroves) provide an optimum natural environment for the sequestration and long-term storage of carbon dioxide from the atmosphere. However, little is yet known about the biological, chemical and physical processes that drive the air-sea carbon dioxide gas exchange in coastal wetlands. As a fertilizer, the nitrogen (mainly, ammonia) increases the vegetative growth and thus more carbon dioxide gas is fixed in plants as biomass representing the short-term storage pool of carbon, therefore reducing its atmospheric level. However, this could dampen soil carbon sequestration which represents the long-term storage of the plant-fixed carbon. Numerous studies consider emissions and the sequestration of carbon dioxide gas in wetlands (raich and schlesinger, 1992; franzen, 1994; mitsch and gosselink, 2000; turetsky et al., 2002; zhang et al., 2005). However, only very few papers analyze nitrogen emission from wetlands (fey et al., 1999; mander et al., 2003; teiter and mander, 2005). These observations show the importance of the interaction of carbon and nitrogen fluxes in wetlands which is still poorly understood (mander et al., 2008). Furthermore, increasing the uptake of carbon dioxide gas by plants due to nitrogen fertilization may affect the diversity of plants which affects the stability of ecosystems (catovsky et al., 2002). Few measurements of carbon an...

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