Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters
Copper-binding organic ligands were measured during austral winter in surface waters around the Antarctic Peninsula using competitive ligand exchange-adsorptive cathodic stripping voltammetry with multiple analytical windows. Samples were collected from four distinct water masses including the Antar...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Digital Commons @ University of South Florida
2013
|
Subjects: | |
Online Access: | https://digitalcommons.usf.edu/msc_facpub/605 https://doi.org/10.1016/j.dsr2.2012.07.023 |
id |
ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1607 |
---|---|
record_format |
openpolar |
spelling |
ftusouthflorida:oai:digitalcommons.usf.edu:msc_facpub-1607 2023-07-30T03:56:47+02:00 Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters Bundy, Randelle Barbeau, Katherine Buck, Kristen N. 2013-06-01T07:00:00Z https://digitalcommons.usf.edu/msc_facpub/605 https://doi.org/10.1016/j.dsr2.2012.07.023 unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/605 doi:10.1016/j.dsr2.2012.07.023 https://doi.org/10.1016/j.dsr2.2012.07.023 Marine Science Faculty Publications Copper Antarctic Peninsula Organic ligands Phytoplankton Life Sciences article 2013 ftusouthflorida https://doi.org/10.1016/j.dsr2.2012.07.023 2023-07-13T20:45:14Z Copper-binding organic ligands were measured during austral winter in surface waters around the Antarctic Peninsula using competitive ligand exchange-adsorptive cathodic stripping voltammetry with multiple analytical windows. Samples were collected from four distinct water masses including the Antarctic Circumpolar Current, Southern Antarctic Circumpolar Current Front, Bransfield Strait, and the shelf region of the Antarctic Peninsula. Strong copper-binding organic ligands were detected in each water mass. The strongest copper-binding ligands were detected at the highest competition strength in the Antarctic Circumpolar Current, with an average conditional stability constant of logKCuL,Cu2+cond=16.00±0.82" role="presentation">. The weakest ligands were found at the lowest competition strength in the shelf region with logKCuL,Cu2+cond=12.68±0.48" role="presentation">. No ligands with stability constants less than logKCuL,Cu2+cond=13.5" role="presentation"> were detected in the Antarctic Circumpolar Current at any competition strength, suggesting a shelf source of weaker copper-binding ligands. Free, hydrated copper ion concentrations, the biologically available form of dissolved copper, were less than 10−14 M in all samples, approaching levels that may be limiting for some types of inducible iron acquisition. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait University of South Florida St. Petersburg: Digital USFSP Antarctic Antarctic Peninsula Austral Bransfield Strait The Antarctic Deep Sea Research Part II: Topical Studies in Oceanography 90 134 146 |
institution |
Open Polar |
collection |
University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Copper Antarctic Peninsula Organic ligands Phytoplankton Life Sciences |
spellingShingle |
Copper Antarctic Peninsula Organic ligands Phytoplankton Life Sciences Bundy, Randelle Barbeau, Katherine Buck, Kristen N. Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters |
topic_facet |
Copper Antarctic Peninsula Organic ligands Phytoplankton Life Sciences |
description |
Copper-binding organic ligands were measured during austral winter in surface waters around the Antarctic Peninsula using competitive ligand exchange-adsorptive cathodic stripping voltammetry with multiple analytical windows. Samples were collected from four distinct water masses including the Antarctic Circumpolar Current, Southern Antarctic Circumpolar Current Front, Bransfield Strait, and the shelf region of the Antarctic Peninsula. Strong copper-binding organic ligands were detected in each water mass. The strongest copper-binding ligands were detected at the highest competition strength in the Antarctic Circumpolar Current, with an average conditional stability constant of logKCuL,Cu2+cond=16.00±0.82" role="presentation">. The weakest ligands were found at the lowest competition strength in the shelf region with logKCuL,Cu2+cond=12.68±0.48" role="presentation">. No ligands with stability constants less than logKCuL,Cu2+cond=13.5" role="presentation"> were detected in the Antarctic Circumpolar Current at any competition strength, suggesting a shelf source of weaker copper-binding ligands. Free, hydrated copper ion concentrations, the biologically available form of dissolved copper, were less than 10−14 M in all samples, approaching levels that may be limiting for some types of inducible iron acquisition. |
format |
Article in Journal/Newspaper |
author |
Bundy, Randelle Barbeau, Katherine Buck, Kristen N. |
author_facet |
Bundy, Randelle Barbeau, Katherine Buck, Kristen N. |
author_sort |
Bundy, Randelle |
title |
Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters |
title_short |
Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters |
title_full |
Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters |
title_fullStr |
Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters |
title_full_unstemmed |
Sources of Strong Copper-binding Ligands in Antarctic Peninsula Surface Waters |
title_sort |
sources of strong copper-binding ligands in antarctic peninsula surface waters |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2013 |
url |
https://digitalcommons.usf.edu/msc_facpub/605 https://doi.org/10.1016/j.dsr2.2012.07.023 |
geographic |
Antarctic Antarctic Peninsula Austral Bransfield Strait The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Austral Bransfield Strait The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/605 doi:10.1016/j.dsr2.2012.07.023 https://doi.org/10.1016/j.dsr2.2012.07.023 |
op_doi |
https://doi.org/10.1016/j.dsr2.2012.07.023 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
90 |
container_start_page |
134 |
op_container_end_page |
146 |
_version_ |
1772814606216986624 |