Sediments Tell the History of Eutrophication and Hypoxia in the Northern Gulf of Mexico
We examined a suite of paleoindicators in ²¹⁰pb-dated sediment cores to determine the historical course of primary production, eutrophication, and oxygen stress in the coastal ocean adjacent to the plumes of the Mississippi and Atchafalaya rivers. The assumption that hypoxia is a natural feature of...
Gespeichert in:
Veröffentlicht in: | Ecological applications 2007-07, Vol.17 (5), p.S129-S143 |
---|---|
Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | S143 |
---|---|
container_issue | 5 |
container_start_page | S129 |
container_title | Ecological applications |
container_volume | 17 |
creator | Rabalais, Nancy N. Turner, R. Eugene Gupta, Barun K. Sen Platon, Emil Parsons, Michael L. |
description | We examined a suite of paleoindicators in ²¹⁰pb-dated sediment cores to determine the historical course of primary production, eutrophication, and oxygen stress in the coastal ocean adjacent to the plumes of the Mississippi and Atchafalaya rivers. The assumption that hypoxia is a natural feature of the coastal ecosystem in the northern Gulf of Mexico influenced by the discharge of the Mississippi River system is not supported by paleoindicators in accumulated sediments. There is a propensity for the ecosystem to develop hypoxia because of the high discharge of the Mississippi River and physical dynamics on the continental shelf that support stratification. However, paleoindicators of eutrophication and oxygen conditions record recent anthropogenic influences. The evidence for increased carbon production and accumulation comes from diatoms and their remnants, marine-origin carbon in the sediments, and phytoplankton pigments. Surrogates for oxygen condition, including mineral, isotopic, microfossil, and phytoplankton pigment indicators, indicate worsening oxygen stress. The changes are more apparent in areas of present chronic hypoxia and are coincident with the increasing nitrogen loads from the Mississippi River system beginning in the 1950s. Longer-term shifts in offshore ecology parallel landscape changes within the watershed in the last two centuries. The temporal shifts in this coastal ecosystem parallel the time sequence of similarly eutrophied coastal waters globally and coincide nicely with sediment analyses from other locations. |
doi_str_mv | 10.1890/06-0644.1 |
format | Article |
fullrecord | <record><control><sourceid>jstor_proqu</sourceid><recordid>TN_cdi_proquest_miscellaneous_20015666</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><jstor_id>40061822</jstor_id><sourcerecordid>40061822</sourcerecordid><originalsourceid>FETCH-LOGICAL-c4319-489adee8e1d1478753428a989f5f35369444b41b8cc717661dfe2937bfcb2b1b3</originalsourceid><addsrcrecordid>eNp1kE9LAzEQxYMoWKsHP4CQk-BhayabzSbHUmorVC204jHsnyxN2W7WZIvttzdrxZtzmTn83sybh9AtkBEISR4JjwhnbARnaAAyllGSCHoeZpJARFIOl-jK-y0JRSkdoI-VLs1ON53Ha13XuNtoPDe-s-6IbYWn-87ZdmOKrDO2wVlT4vmxtQeTYdP8wK_WheYaPNvXVS950QdT2Gt0UWW11ze_fYjen6bryTxavM2eJ-NFVLAYZMSEzEqthYYSWCrSJGZUZFLIKqniJOaSMZYzyEVRpJByDmWlqYzTvCpymkMeD9H9aW_r7Ode-07tjC_CJ1mj7d4rSggknPMAPpzAwlnvna5U68wuc0cFRPXRKcJVH52CwKYn9svU-vg_qKbjZTgQnK2WyQqCsSG6Oym3fYR_SkYIB0Fp_A2UHXmO</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>20015666</pqid></control><display><type>article</type><title>Sediments Tell the History of Eutrophication and Hypoxia in the Northern Gulf of Mexico</title><source>Access via Wiley Online Library</source><source>JSTOR Archive Collection A-Z Listing</source><creator>Rabalais, Nancy N. ; Turner, R. Eugene ; Gupta, Barun K. Sen ; Platon, Emil ; Parsons, Michael L.</creator><creatorcontrib>Rabalais, Nancy N. ; Turner, R. Eugene ; Gupta, Barun K. Sen ; Platon, Emil ; Parsons, Michael L.</creatorcontrib><description>We examined a suite of paleoindicators in ²¹⁰pb-dated sediment cores to determine the historical course of primary production, eutrophication, and oxygen stress in the coastal ocean adjacent to the plumes of the Mississippi and Atchafalaya rivers. The assumption that hypoxia is a natural feature of the coastal ecosystem in the northern Gulf of Mexico influenced by the discharge of the Mississippi River system is not supported by paleoindicators in accumulated sediments. There is a propensity for the ecosystem to develop hypoxia because of the high discharge of the Mississippi River and physical dynamics on the continental shelf that support stratification. However, paleoindicators of eutrophication and oxygen conditions record recent anthropogenic influences. The evidence for increased carbon production and accumulation comes from diatoms and their remnants, marine-origin carbon in the sediments, and phytoplankton pigments. Surrogates for oxygen condition, including mineral, isotopic, microfossil, and phytoplankton pigment indicators, indicate worsening oxygen stress. The changes are more apparent in areas of present chronic hypoxia and are coincident with the increasing nitrogen loads from the Mississippi River system beginning in the 1950s. Longer-term shifts in offshore ecology parallel landscape changes within the watershed in the last two centuries. The temporal shifts in this coastal ecosystem parallel the time sequence of similarly eutrophied coastal waters globally and coincide nicely with sediment analyses from other locations.</description><identifier>ISSN: 1051-0761</identifier><identifier>EISSN: 1939-5582</identifier><identifier>DOI: 10.1890/06-0644.1</identifier><language>eng</language><publisher>Ecological Society of America</publisher><subject>Bacillariophyceae ; Bays ; Brackish ; Diatoms ; Eutrophication ; Freshwater ; Gulf of Mexico ; Gulfs ; Hypoxia ; Marine ; microfossils ; Mississippi River ; Nitrogen ; nutrients ; Oxygen ; paleoindicators ; Phytoplankton ; River deltas ; Sediments</subject><ispartof>Ecological applications, 2007-07, Vol.17 (5), p.S129-S143</ispartof><rights>Copyright 2007 Ecological Society of America</rights><rights>2007 by the Ecological Society of America</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4319-489adee8e1d1478753428a989f5f35369444b41b8cc717661dfe2937bfcb2b1b3</citedby><cites>FETCH-LOGICAL-c4319-489adee8e1d1478753428a989f5f35369444b41b8cc717661dfe2937bfcb2b1b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/40061822$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/40061822$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>315,782,786,805,1419,27931,27932,45581,45582,58024,58257</link.rule.ids></links><search><creatorcontrib>Rabalais, Nancy N.</creatorcontrib><creatorcontrib>Turner, R. Eugene</creatorcontrib><creatorcontrib>Gupta, Barun K. Sen</creatorcontrib><creatorcontrib>Platon, Emil</creatorcontrib><creatorcontrib>Parsons, Michael L.</creatorcontrib><title>Sediments Tell the History of Eutrophication and Hypoxia in the Northern Gulf of Mexico</title><title>Ecological applications</title><description>We examined a suite of paleoindicators in ²¹⁰pb-dated sediment cores to determine the historical course of primary production, eutrophication, and oxygen stress in the coastal ocean adjacent to the plumes of the Mississippi and Atchafalaya rivers. The assumption that hypoxia is a natural feature of the coastal ecosystem in the northern Gulf of Mexico influenced by the discharge of the Mississippi River system is not supported by paleoindicators in accumulated sediments. There is a propensity for the ecosystem to develop hypoxia because of the high discharge of the Mississippi River and physical dynamics on the continental shelf that support stratification. However, paleoindicators of eutrophication and oxygen conditions record recent anthropogenic influences. The evidence for increased carbon production and accumulation comes from diatoms and their remnants, marine-origin carbon in the sediments, and phytoplankton pigments. Surrogates for oxygen condition, including mineral, isotopic, microfossil, and phytoplankton pigment indicators, indicate worsening oxygen stress. The changes are more apparent in areas of present chronic hypoxia and are coincident with the increasing nitrogen loads from the Mississippi River system beginning in the 1950s. Longer-term shifts in offshore ecology parallel landscape changes within the watershed in the last two centuries. The temporal shifts in this coastal ecosystem parallel the time sequence of similarly eutrophied coastal waters globally and coincide nicely with sediment analyses from other locations.</description><subject>Bacillariophyceae</subject><subject>Bays</subject><subject>Brackish</subject><subject>Diatoms</subject><subject>Eutrophication</subject><subject>Freshwater</subject><subject>Gulf of Mexico</subject><subject>Gulfs</subject><subject>Hypoxia</subject><subject>Marine</subject><subject>microfossils</subject><subject>Mississippi River</subject><subject>Nitrogen</subject><subject>nutrients</subject><subject>Oxygen</subject><subject>paleoindicators</subject><subject>Phytoplankton</subject><subject>River deltas</subject><subject>Sediments</subject><issn>1051-0761</issn><issn>1939-5582</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNp1kE9LAzEQxYMoWKsHP4CQk-BhayabzSbHUmorVC204jHsnyxN2W7WZIvttzdrxZtzmTn83sybh9AtkBEISR4JjwhnbARnaAAyllGSCHoeZpJARFIOl-jK-y0JRSkdoI-VLs1ON53Ha13XuNtoPDe-s-6IbYWn-87ZdmOKrDO2wVlT4vmxtQeTYdP8wK_WheYaPNvXVS950QdT2Gt0UWW11ze_fYjen6bryTxavM2eJ-NFVLAYZMSEzEqthYYSWCrSJGZUZFLIKqniJOaSMZYzyEVRpJByDmWlqYzTvCpymkMeD9H9aW_r7Ode-07tjC_CJ1mj7d4rSggknPMAPpzAwlnvna5U68wuc0cFRPXRKcJVH52CwKYn9svU-vg_qKbjZTgQnK2WyQqCsSG6Oym3fYR_SkYIB0Fp_A2UHXmO</recordid><startdate>200707</startdate><enddate>200707</enddate><creator>Rabalais, Nancy N.</creator><creator>Turner, R. Eugene</creator><creator>Gupta, Barun K. Sen</creator><creator>Platon, Emil</creator><creator>Parsons, Michael L.</creator><general>Ecological Society of America</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7SN</scope><scope>7ST</scope><scope>7TV</scope><scope>7U6</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>H97</scope><scope>L.G</scope></search><sort><creationdate>200707</creationdate><title>Sediments Tell the History of Eutrophication and Hypoxia in the Northern Gulf of Mexico</title><author>Rabalais, Nancy N. ; Turner, R. Eugene ; Gupta, Barun K. Sen ; Platon, Emil ; Parsons, Michael L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4319-489adee8e1d1478753428a989f5f35369444b41b8cc717661dfe2937bfcb2b1b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Bacillariophyceae</topic><topic>Bays</topic><topic>Brackish</topic><topic>Diatoms</topic><topic>Eutrophication</topic><topic>Freshwater</topic><topic>Gulf of Mexico</topic><topic>Gulfs</topic><topic>Hypoxia</topic><topic>Marine</topic><topic>microfossils</topic><topic>Mississippi River</topic><topic>Nitrogen</topic><topic>nutrients</topic><topic>Oxygen</topic><topic>paleoindicators</topic><topic>Phytoplankton</topic><topic>River deltas</topic><topic>Sediments</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rabalais, Nancy N.</creatorcontrib><creatorcontrib>Turner, R. Eugene</creatorcontrib><creatorcontrib>Gupta, Barun K. Sen</creatorcontrib><creatorcontrib>Platon, Emil</creatorcontrib><creatorcontrib>Parsons, Michael L.</creatorcontrib><collection>CrossRef</collection><collection>Aqualine</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Sustainability Science Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Ecological applications</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rabalais, Nancy N.</au><au>Turner, R. Eugene</au><au>Gupta, Barun K. Sen</au><au>Platon, Emil</au><au>Parsons, Michael L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sediments Tell the History of Eutrophication and Hypoxia in the Northern Gulf of Mexico</atitle><jtitle>Ecological applications</jtitle><date>2007-07</date><risdate>2007</risdate><volume>17</volume><issue>5</issue><spage>S129</spage><epage>S143</epage><pages>S129-S143</pages><issn>1051-0761</issn><eissn>1939-5582</eissn><abstract>We examined a suite of paleoindicators in ²¹⁰pb-dated sediment cores to determine the historical course of primary production, eutrophication, and oxygen stress in the coastal ocean adjacent to the plumes of the Mississippi and Atchafalaya rivers. The assumption that hypoxia is a natural feature of the coastal ecosystem in the northern Gulf of Mexico influenced by the discharge of the Mississippi River system is not supported by paleoindicators in accumulated sediments. There is a propensity for the ecosystem to develop hypoxia because of the high discharge of the Mississippi River and physical dynamics on the continental shelf that support stratification. However, paleoindicators of eutrophication and oxygen conditions record recent anthropogenic influences. The evidence for increased carbon production and accumulation comes from diatoms and their remnants, marine-origin carbon in the sediments, and phytoplankton pigments. Surrogates for oxygen condition, including mineral, isotopic, microfossil, and phytoplankton pigment indicators, indicate worsening oxygen stress. The changes are more apparent in areas of present chronic hypoxia and are coincident with the increasing nitrogen loads from the Mississippi River system beginning in the 1950s. Longer-term shifts in offshore ecology parallel landscape changes within the watershed in the last two centuries. The temporal shifts in this coastal ecosystem parallel the time sequence of similarly eutrophied coastal waters globally and coincide nicely with sediment analyses from other locations.</abstract><pub>Ecological Society of America</pub><doi>10.1890/06-0644.1</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record> |
fulltext | fulltext |
identifier | ISSN: 1051-0761 |
ispartof | Ecological applications, 2007-07, Vol.17 (5), p.S129-S143 |
issn | 1051-0761 1939-5582 |
language | eng |
recordid | cdi_proquest_miscellaneous_20015666 |
source | Access via Wiley Online Library; JSTOR Archive Collection A-Z Listing |
subjects | Bacillariophyceae Bays Brackish Diatoms Eutrophication Freshwater Gulf of Mexico Gulfs Hypoxia Marine microfossils Mississippi River Nitrogen nutrients Oxygen paleoindicators Phytoplankton River deltas Sediments |
title | Sediments Tell the History of Eutrophication and Hypoxia in the Northern Gulf of Mexico |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-05T17%3A43%3A42IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-jstor_proqu&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Sediments%20Tell%20the%20History%20of%20Eutrophication%20and%20Hypoxia%20in%20the%20Northern%20Gulf%20of%20Mexico&rft.jtitle=Ecological%20applications&rft.au=Rabalais,%20Nancy%20N.&rft.date=2007-07&rft.volume=17&rft.issue=5&rft.spage=S129&rft.epage=S143&rft.pages=S129-S143&rft.issn=1051-0761&rft.eissn=1939-5582&rft_id=info:doi/10.1890/06-0644.1&rft_dat=%3Cjstor_proqu%3E40061822%3C/jstor_proqu%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=20015666&rft_id=info:pmid/&rft_jstor_id=40061822&rfr_iscdi=true |