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Methane carbon supports aquatic food webs to the fish level

Sanseverino,, Angela M and Bastviken, David and Sundh, Ingvar and Pickova, Jana and enrich-prast, alex (2012). Methane carbon supports aquatic food webs to the fish level. PloS one. 7:8, 1-8
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Official URL: http://dx.doi.org/10.1371/journal.pone.0042723

Abstract

Large amounts of the greenhouse gas methane (CH4) are produced by anaerobic mineralization of organic matter in lakes. In spite of extensive freshwater CH4 emissions, most of the CH4 is typically oxidized by methane oxidizing bacteria (MOB) before it can reach the lake surface and be emitted to the atmosphere. In turn, it has been shown that the CH4-derived biomass of MOB can provide the energy and carbon for zooplankton and macroinvertebrates. In this study, we demonstrate the presence of specific fatty acids synthesized by MOB in fish tissues having low carbon stable isotope ratios. Fish species, zooplankton, macroinvertebrates and the water hyacinth Eichhornia crassipes were collected from a shallow lake in Brazil and analyzed for fatty acids (FA) and carbon stable isotope ratios (delta C-13). The fatty acids 16:1 omega 8c, 16:1 omega 8t, 16:1 omega 6c, 16:1 omega 5t, 18:1 omega 8c and 18:1 omega 8t were used as signature for MOB. The delta C-13 ratios varied from -27.7 parts per thousand to -42.0 parts per thousand and the contribution of MOB FA ranged from 0.05% to 0.84% of total FA. Organisms with higher total content of MOB FAs presented lower delta C-13 values (i.e. they were more depleted in C-13), while organisms with lower content of MOB signature FAs showed higher delta C-13 values. An UPGMA cluster analysis was carried out to distinguish grouping of organisms in relation to their MOB FA contents. This combination of stable isotope and fatty acid tracers provides new evidence that assimilation of methane-derived carbon can be an important carbon source for the whole aquatic food web, up to the fish level.

Authors/Creators:Sanseverino,, Angela M and Bastviken, David and Sundh, Ingvar and Pickova, Jana and enrich-prast, alex
Title:Methane carbon supports aquatic food webs to the fish level
Series/Journal:PloS one (1932-6203)
Year of publishing :2012
Volume:7
Number:8
Page range:1-8
Number of Pages:8
Publisher:Public Library of Science
ISSN:1932-6203
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:M Aquatic sciences and fisheries > M01 Fisheries and aquaculture - General aspects
M Aquatic sciences and fisheries > M40 Aquatic ecology
X Agricola extesions > X30 Life sciences
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
Keywords:greenhouse gas methane (CH 4 ) , lakes, fatty acids , fish species, zooplankton, macroinvertebrates, water hyacinth Eichhornia crassipes, stable isotope, aquatic food web
URN:NBN:urn:nbn:se:slu:epsilon-e-1501
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1501
Additional ID:
Type of IDID
Web of Science (WoS)000307437900051
DOI10.1371/journal.pone.0042723
ID Code:10474
Department:(NL, NJ) > Dept. of Food Science (until 161231)
(NL, NJ) > Dept. of Microbiology (until 161231)
Deposited By: SLUpub Connector
Deposited On:17 Jun 2013 13:47
Metadata Last Modified:28 Mar 2015 03:09

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