Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula

Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula

10 pages, 5 figures, 5 tables

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Bibliographic Details
Main Authors: Sañé, Elisabet, Isla, Enrique, Grémare, Antoine, Escoubeyrou, K.
Format: artículo biblioteca
Language:English
Published: Springer 2013-11
Subjects:Marine sediments, Amino acids, Antarctica,
Online Access:http://hdl.handle.net/10261/90138
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spelling dig-icm-es-10261-901382020-12-09T16:51:28Z Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula Sañé, Elisabet Isla, Enrique Grémare, Antoine Escoubeyrou, K. Marine sediments Amino acids Antarctica 10 pages, 5 figures, 5 tables Ongoing global warming is affecting the polar regions at a faster pace than in many other lower latitude environments. Based on the idea that the changes at the sea surface leave a signal in the sedimentary record, we analysed the total hydrolysable amino acid (THAA) and enzymatically hydrolysable amino acid (EHAA) contents in sediments off the coast of the eastern Antarctic Peninsula during the decade following the collapse of sections A and B of the Larsen ice shelf to check their utility as biomarkers of this event. Two organic matter lability indexes (the EHAA-to-THAA ratio and the Dauwe degradation index) were also calculated to assess the quality of the organic matter in the sediment column. The THAA and EHAA concentrations in the upper 5 mm varied between ~1 and ~10 nmol mg-1 DW-1, corresponding to an oligotrophic environment, whereas the quality of the organic matter as indicated by the lability indexes was relatively high in the upper sediment column (<2 cm deep). The amino acid profiles and indexes in the sediment column were compared to the pigment profiles and indexes published in previous studies for the same stations. The results suggest that in the sediment column, pigments track more accurately than amino acids the pelagic organic matter supply to the seabed after the collapse of the Larsen ice shelf. © 2013 Springer-Verlag Berlin Heidelberg Peer Reviewed 2014-01-30T08:58:50Z 2014-01-30T08:58:50Z 2013-11 2014-01-30T08:58:50Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1007/s00300-013-1386-5 issn: 0722-4060 e-issn: 1432-2056 Polar Biology 36(11): 1671-1680 (2013) http://hdl.handle.net/10261/90138 10.1007/s00300-013-1386-5 en https://doi.org/10.1007/s00300-013-1386-5 none Springer
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
language English
topic Marine sediments
Amino acids
Antarctica
Marine sediments
Amino acids
Antarctica
spellingShingle Marine sediments
Amino acids
Antarctica
Marine sediments
Amino acids
Antarctica
Sañé, Elisabet
Isla, Enrique
Grémare, Antoine
Escoubeyrou, K.
Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula
description 10 pages, 5 figures, 5 tables
format artículo
topic_facet Marine sediments
Amino acids
Antarctica
author Sañé, Elisabet
Isla, Enrique
Grémare, Antoine
Escoubeyrou, K.
author_facet Sañé, Elisabet
Isla, Enrique
Grémare, Antoine
Escoubeyrou, K.
author_sort Sañé, Elisabet
title Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula
title_short Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula
title_full Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula
title_fullStr Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula
title_full_unstemmed Utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of Larsen region, Eastern Antarctic Peninsula
title_sort utility of amino acids as biomarkers in polar marine sediments: a study on the continental shelf of larsen region, eastern antarctic peninsula
publisher Springer
publishDate 2013-11
url http://hdl.handle.net/10261/90138
work_keys_str_mv AT saneelisabet utilityofaminoacidsasbiomarkersinpolarmarinesedimentsastudyonthecontinentalshelfoflarsenregioneasternantarcticpeninsula
AT islaenrique utilityofaminoacidsasbiomarkersinpolarmarinesedimentsastudyonthecontinentalshelfoflarsenregioneasternantarcticpeninsula
AT gremareantoine utilityofaminoacidsasbiomarkersinpolarmarinesedimentsastudyonthecontinentalshelfoflarsenregioneasternantarcticpeninsula
AT escoubeyrouk utilityofaminoacidsasbiomarkersinpolarmarinesedimentsastudyonthecontinentalshelfoflarsenregioneasternantarcticpeninsula
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