Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters
Substantial increases in the concentrations of the stronger of two Fe(III) complexing organic ligand classes measured during the mesoscale Fe enrichment studies IronEx II and SOIREE appeared to sharply curtailed Fe availability to diatoms and thus limited the efficiency of carbon sequestration to th...
Main Author: | |
---|---|
Other Authors: | |
Format: | Report |
Language: | English |
Published: |
Charles Trick, Western University
2013
|
Subjects: | |
Online Access: | https://doi.org/10.2172/1088843 http://digital.library.unt.edu/ark:/67531/metadc842669/ |
id |
ftunivnotexas:info:ark/67531/metadc842669 |
---|---|
record_format |
openpolar |
spelling |
ftunivnotexas:info:ark/67531/metadc842669 2023-05-15T18:25:35+02:00 Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters Trick, Charles Gordon United States. Department of Energy. 2013-07-30 160 KB Text https://doi.org/10.2172/1088843 http://digital.library.unt.edu/ark:/67531/metadc842669/ English eng Charles Trick, Western University rep-no: FG02-02ER63431 Final Report grantno: FG02-02ER63431 doi:10.2172/1088843 osti: 1088843 http://digital.library.unt.edu/ark:/67531/metadc842669/ ark: ark:/67531/metadc842669 54 Environmental Sciences Iron Ocean Carbon Sequestration Toxins Ligands Ocean Fetrilization Iron Report 2013 ftunivnotexas https://doi.org/10.2172/1088843 2016-12-03T23:11:10Z Substantial increases in the concentrations of the stronger of two Fe(III) complexing organic ligand classes measured during the mesoscale Fe enrichment studies IronEx II and SOIREE appeared to sharply curtailed Fe availability to diatoms and thus limited the efficiency of carbon sequestration to the deep. Detailed observations during IronEx II (equatorial Pacific Ocean) and SOIREE (Southern Ocean –Pacific sector) indicate that the diatoms began re-experiencing Fe stress even though dissolved Fe concentrations remained elevated in the patch. This surprising outcome likely is related to the observed increased concentrations of strong Fe(III)-complexing ligands in seawater. Preliminary findings from other studies indicate that diatoms may not readily obtain Fe from these chemical species whereas Fe bound by strong ligands appears to support growth of cyanobacteria and nanoflagellates. The difficulty in assessing the likelihood of these changes with in-situ mesoscale experiments is the extended monitoring period needed to capture the long-term trajectory of the carbon cycle. A more detailed understanding of Fe complexing ligand effects on long-term ecosystem structure and carbon cycling is essential to ascertain not only the effect of Fe enrichment on short-term carbon sequestration in the oceans, but also the potential effect of Fe enrichment in modifying ecosystem structure and trajectory. Report Southern Ocean University of North Texas: UNT Digital Library Pacific Southern Ocean |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
54 Environmental Sciences Iron Ocean Carbon Sequestration Toxins Ligands Ocean Fetrilization Iron |
spellingShingle |
54 Environmental Sciences Iron Ocean Carbon Sequestration Toxins Ligands Ocean Fetrilization Iron Trick, Charles Gordon Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters |
topic_facet |
54 Environmental Sciences Iron Ocean Carbon Sequestration Toxins Ligands Ocean Fetrilization Iron |
description |
Substantial increases in the concentrations of the stronger of two Fe(III) complexing organic ligand classes measured during the mesoscale Fe enrichment studies IronEx II and SOIREE appeared to sharply curtailed Fe availability to diatoms and thus limited the efficiency of carbon sequestration to the deep. Detailed observations during IronEx II (equatorial Pacific Ocean) and SOIREE (Southern Ocean –Pacific sector) indicate that the diatoms began re-experiencing Fe stress even though dissolved Fe concentrations remained elevated in the patch. This surprising outcome likely is related to the observed increased concentrations of strong Fe(III)-complexing ligands in seawater. Preliminary findings from other studies indicate that diatoms may not readily obtain Fe from these chemical species whereas Fe bound by strong ligands appears to support growth of cyanobacteria and nanoflagellates. The difficulty in assessing the likelihood of these changes with in-situ mesoscale experiments is the extended monitoring period needed to capture the long-term trajectory of the carbon cycle. A more detailed understanding of Fe complexing ligand effects on long-term ecosystem structure and carbon cycling is essential to ascertain not only the effect of Fe enrichment on short-term carbon sequestration in the oceans, but also the potential effect of Fe enrichment in modifying ecosystem structure and trajectory. |
author2 |
United States. Department of Energy. |
format |
Report |
author |
Trick, Charles Gordon |
author_facet |
Trick, Charles Gordon |
author_sort |
Trick, Charles Gordon |
title |
Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters |
title_short |
Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters |
title_full |
Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters |
title_fullStr |
Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters |
title_full_unstemmed |
Final Activity Report: The Effects of Iron Complexing Ligands on the Long Term Ecosystem Response to Iron Enrichment of HNLC waters |
title_sort |
final activity report: the effects of iron complexing ligands on the long term ecosystem response to iron enrichment of hnlc waters |
publisher |
Charles Trick, Western University |
publishDate |
2013 |
url |
https://doi.org/10.2172/1088843 http://digital.library.unt.edu/ark:/67531/metadc842669/ |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
rep-no: FG02-02ER63431 Final Report grantno: FG02-02ER63431 doi:10.2172/1088843 osti: 1088843 http://digital.library.unt.edu/ark:/67531/metadc842669/ ark: ark:/67531/metadc842669 |
op_doi |
https://doi.org/10.2172/1088843 |
_version_ |
1766207149632913408 |