New production modeled from nitrate reductase activity in the Peru current upwelling

González-Galisteo, S.; Packard, Theodore T.; Gómez, May; Herrera, Alicia; Dugdale, Richard C.; Wilkerson, F.P.; Barber, R.T.; Blasco, Dolors; Christensen, John; Codispoti, L.A.; National Science Foundation (US)

New production modeled from nitrate reductase activity in the Peru current upwelling

VI Simposio Internacional de Ciencias del Mar - VI International Symposium of Marine Sciences (ISMS 2018), 20- 22 June 2018, Vigo.-- 2 pages

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Main Authors:	González-Galisteo, S., Packard, Theodore T., Gómez, May, Herrera, Alicia, Dugdale, Richard C., Wilkerson, F.P., Barber, R.T., Blasco, Dolors, Christensen, John, Codispoti, L.A.
Other Authors:	National Science Foundation (US)
Format:	comunicación de congreso biblioteca
Published:	2018-06
Subjects:	Nitrogen uptake, Light, Phytoplankton, Primary production, Nitrate,
Online Access:	http://hdl.handle.net/10261/186232 http://dx.doi.org/10.13039/100000001
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id	dig-icm-es-10261-186232
record_format	koha
spelling	dig-icm-es-10261-1862322022-09-20T11:50:53Z New production modeled from nitrate reductase activity in the Peru current upwelling González-Galisteo, S. Packard, Theodore T. Gómez, May Herrera, Alicia Dugdale, Richard C. Wilkerson, F.P. Barber, R.T. Blasco, Dolors Christensen, John Codispoti, L.A. National Science Foundation (US) Nitrogen uptake Light Phytoplankton Primary production Nitrate VI Simposio Internacional de Ciencias del Mar - VI International Symposium of Marine Sciences (ISMS 2018), 20- 22 June 2018, Vigo.-- 2 pages We have developed alight-dependent, nitrate and ammonium independent model of New Production based on phytoplankton nitrate reductase (NR) activity that predicts strong New Production off Peru. The model is based on measurements from the Coastal Upwelling Ecosystem Analysis(CUEA) JASON expedition from September 1976. The samples were taken along a transect line (C-Line) across the Peru current at 15°S, which extended from the coast, at position C-1, across the Peru trench to position C-14, 200 km offshore. Sampling depths were established according tolightpenetration; euphotic zone samples were taken at depths where the light was 100, 50, 30, 15, 5, 1 and 0.1% of the surface incident radiation. The model responded to the equation: =·[ℎ]/67+[ℎ] which depends on the NR activity [NR] expressed in μM h-1, the amount of light [hv] expressed in % of incident radiation (I0) and the Michaelis-Menten constant(KLT),the amount of light [ℎ] at which half of themaximum NR activity is reached, which took a value of2.4% of I0. The developed model showed that the New Production at the 50% light level in the euphotic zone ranged from 3.49 μM C h−1, 12 km downstream from the upwelling center to 0.15 μM C h−1, 46 km further downstream over the 4000 m deep Peru Trench where the upwelling was relatively weak. It compared well with 14C carbon productivity measurements whose range was 0-4.2 μM C h−1and 0-1.5 μM C h−1for the 6 h (gross) and 24 h (net) productivity, respectively. In nitrogen units, the overall New Production ranged from 4 to 510 nM of N h−1. The oceanographic conditions found during September 1976 made this site in the Peruvian upwelling an ideal one to model new production. Temperature in the center of the upwelling in Septemberof 1976 reached 14.07°C, while NO3−and NO2−ranged from 6.65 to 7.5 and 0.51 to 1.6 μM respectively. Chlorophyll, averaging 3.85 μg L−1for the section stations in September 1976, was similar to what it was for all the stations 6 months later in March 1977 (3.23 μg L−1). NR, averaging 0.20 μM N h−1for the section stations in September 1976, was twice what it was for all stations, 6 month later in March 1977 (0.09 μM N h-1) NSF (USA) grant OCE 75-23718A01 (TTP) funded JASON-76. S.G.-G. was self-funded. T.T.P. was largely supported by TIAA-CREF and Social Security (USA), but also partially by the Canary Islands CEI: Tricontinental Atlantic Campus Peer Reviewed 2019-07-17T08:11:34Z 2019-07-17T08:11:34Z 2018-06 2019-07-17T08:11:34Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 isbn: 978-84-8158-788-3 Abstracts Volume VI International Symposium on Marine Sciences: 360-361(2018) http://hdl.handle.net/10261/186232 http://dx.doi.org/10.13039/100000001 http://isms.gal/wp-content/uploads/2018/06/ISMS-libro-abstracts.pdf Sí none
institution	ICM ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-icm-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICM España
topic	Nitrogen uptake Light Phytoplankton Primary production Nitrate Nitrogen uptake Light Phytoplankton Primary production Nitrate
spellingShingle	Nitrogen uptake Light Phytoplankton Primary production Nitrate Nitrogen uptake Light Phytoplankton Primary production Nitrate González-Galisteo, S. Packard, Theodore T. Gómez, May Herrera, Alicia Dugdale, Richard C. Wilkerson, F.P. Barber, R.T. Blasco, Dolors Christensen, John Codispoti, L.A. New production modeled from nitrate reductase activity in the Peru current upwelling
description	VI Simposio Internacional de Ciencias del Mar - VI International Symposium of Marine Sciences (ISMS 2018), 20- 22 June 2018, Vigo.-- 2 pages
author2	National Science Foundation (US)
author_facet	National Science Foundation (US) González-Galisteo, S. Packard, Theodore T. Gómez, May Herrera, Alicia Dugdale, Richard C. Wilkerson, F.P. Barber, R.T. Blasco, Dolors Christensen, John Codispoti, L.A.
format	comunicación de congreso
topic_facet	Nitrogen uptake Light Phytoplankton Primary production Nitrate
author	González-Galisteo, S. Packard, Theodore T. Gómez, May Herrera, Alicia Dugdale, Richard C. Wilkerson, F.P. Barber, R.T. Blasco, Dolors Christensen, John Codispoti, L.A.
author_sort	González-Galisteo, S.
title	New production modeled from nitrate reductase activity in the Peru current upwelling
title_short	New production modeled from nitrate reductase activity in the Peru current upwelling
title_full	New production modeled from nitrate reductase activity in the Peru current upwelling
title_fullStr	New production modeled from nitrate reductase activity in the Peru current upwelling
title_full_unstemmed	New production modeled from nitrate reductase activity in the Peru current upwelling
title_sort	new production modeled from nitrate reductase activity in the peru current upwelling
publishDate	2018-06
url	http://hdl.handle.net/10261/186232 http://dx.doi.org/10.13039/100000001
work_keys_str_mv	AT gonzalezgalisteos newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT packardtheodoret newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT gomezmay newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT herreraalicia newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT dugdalerichardc newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT wilkersonfp newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT barberrt newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT blascodolors newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT christensenjohn newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling AT codispotila newproductionmodeledfromnitratereductaseactivityintheperucurrentupwelling
_version_	1777666965342519296

New production modeled from nitrate reductase activity in the Peru current upwelling

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