Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA
Bioassays indicate addition of hydrogen peroxide in concentrations similar to rain sometimes decreases chlorophyll a (chl a) production in surface Gulf Stream seawater. Bioassays were conducted on shipboard in the spring and autumn of 1993, 1994, and 1995, using surface Gulf Stream seawater collecte...
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ftcarolinadr:cdr.lib.unc.edu:bk128m69x 2023-09-05T13:21:37+02:00 Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA Willey, Joan D. Paerl, Hans W. Go, Malia University of North Carolina at Chapel Hill 1999 https://doi.org/10.17615/z6y8-pv53 https://cdr.lib.unc.edu/downloads/8p58pp40t?file=thumbnail https://cdr.lib.unc.edu/downloads/8p58pp40t English eng https://doi.org/10.17615/z6y8-pv53 https://cdr.lib.unc.edu/downloads/8p58pp40t?file=thumbnail https://cdr.lib.unc.edu/downloads/8p58pp40t http://rightsstatements.org/vocab/InC/1.0/ Marine Ecology - Progress Series, 178 Chlorophyll a United States Thallophyta Atlantic Ocean Gulf Stream Surface water Trace element North Carolina Algae Primary productivity Hydrogénoperoxyde Seawater North Atlantic Content Heavy metal Rain water Bioavailability America Environmental factor Hydrogenperoxides North America Marine environment Article 1999 ftcarolinadr https://doi.org/10.17615/z6y8-pv53 2023-08-19T22:25:39Z Bioassays indicate addition of hydrogen peroxide in concentrations similar to rain sometimes decreases chlorophyll a (chl a) production in surface Gulf Stream seawater. Bioassays were conducted on shipboard in the spring and autumn of 1993, 1994, and 1995, using surface Gulf Stream seawater collected off the coast of North Carolina. Chl a increases were observed after addition of FeCl3(in 1 of 5 bioassays), iron (III) EDTA (6 of 6 bioassays), or EDTA alone (4 of 4 bioassays). The chl a increases were suppressed significantly in 7 of 1 1 of these bioassays when the bioassay seawater was initially diluted by 1% with a 30 or 40 μM solution of hydrogen peroxide (a concentration similar to rainwater). Hydrogen peroxide induced inhibition of chl a production was not observed in bioassays in which chl a increased in response to addition of nitrate or ammonium, hence the growth inhibition was associated with added metal or complexing agent. Rainwater therefore plays a complex role in primary productivity in surface seawater, with the specific effect dependent upon rainwater concentrations of nitrate, ammonium, trace metals and hydrogen peroxide, as well as on the extent of nitrogen limitation and the oxidant concentration in the surface seawater. Article in Journal/Newspaper North Atlantic Carolina Digital Repository (UNC - University of North Carolina) |
institution |
Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
Chlorophyll a United States Thallophyta Atlantic Ocean Gulf Stream Surface water Trace element North Carolina Algae Primary productivity Hydrogénoperoxyde Seawater North Atlantic Content Heavy metal Rain water Bioavailability America Environmental factor Hydrogenperoxides North America Marine environment |
spellingShingle |
Chlorophyll a United States Thallophyta Atlantic Ocean Gulf Stream Surface water Trace element North Carolina Algae Primary productivity Hydrogénoperoxyde Seawater North Atlantic Content Heavy metal Rain water Bioavailability America Environmental factor Hydrogenperoxides North America Marine environment Willey, Joan D. Paerl, Hans W. Go, Malia Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA |
topic_facet |
Chlorophyll a United States Thallophyta Atlantic Ocean Gulf Stream Surface water Trace element North Carolina Algae Primary productivity Hydrogénoperoxyde Seawater North Atlantic Content Heavy metal Rain water Bioavailability America Environmental factor Hydrogenperoxides North America Marine environment |
description |
Bioassays indicate addition of hydrogen peroxide in concentrations similar to rain sometimes decreases chlorophyll a (chl a) production in surface Gulf Stream seawater. Bioassays were conducted on shipboard in the spring and autumn of 1993, 1994, and 1995, using surface Gulf Stream seawater collected off the coast of North Carolina. Chl a increases were observed after addition of FeCl3(in 1 of 5 bioassays), iron (III) EDTA (6 of 6 bioassays), or EDTA alone (4 of 4 bioassays). The chl a increases were suppressed significantly in 7 of 1 1 of these bioassays when the bioassay seawater was initially diluted by 1% with a 30 or 40 μM solution of hydrogen peroxide (a concentration similar to rainwater). Hydrogen peroxide induced inhibition of chl a production was not observed in bioassays in which chl a increased in response to addition of nitrate or ammonium, hence the growth inhibition was associated with added metal or complexing agent. Rainwater therefore plays a complex role in primary productivity in surface seawater, with the specific effect dependent upon rainwater concentrations of nitrate, ammonium, trace metals and hydrogen peroxide, as well as on the extent of nitrogen limitation and the oxidant concentration in the surface seawater. |
author2 |
University of North Carolina at Chapel Hill |
format |
Article in Journal/Newspaper |
author |
Willey, Joan D. Paerl, Hans W. Go, Malia |
author_facet |
Willey, Joan D. Paerl, Hans W. Go, Malia |
author_sort |
Willey, Joan D. |
title |
Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA |
title_short |
Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA |
title_full |
Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA |
title_fullStr |
Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA |
title_full_unstemmed |
Impact of rainwater hydrogen peroxide on chlorophyll a content of surface Gulf Stream seawater off North Carolina, USA |
title_sort |
impact of rainwater hydrogen peroxide on chlorophyll a content of surface gulf stream seawater off north carolina, usa |
publishDate |
1999 |
url |
https://doi.org/10.17615/z6y8-pv53 https://cdr.lib.unc.edu/downloads/8p58pp40t?file=thumbnail https://cdr.lib.unc.edu/downloads/8p58pp40t |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Marine Ecology - Progress Series, 178 |
op_relation |
https://doi.org/10.17615/z6y8-pv53 https://cdr.lib.unc.edu/downloads/8p58pp40t?file=thumbnail https://cdr.lib.unc.edu/downloads/8p58pp40t |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/z6y8-pv53 |
_version_ |
1776202206882562048 |