The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake
Up to 40% of methane produced in aquatic systems is oxidized before it is released into the atmosphere. Microbial oxidation of methane is an important sink and potentially an important pathway for the incorporation of detrital carbon into aquatic food webs. In this study, we tested the hypothesis th...
Main Authors: | , |
---|---|
Language: | English |
Published: |
2010
|
Subjects: | |
Online Access: | http://libres.uncg.edu/ir/uncg/f/Gentzel_uncg_0154M_10401.pdf |
id |
ftunivnorthcag:oai:libres.uncg.edu/3510 |
---|---|
record_format |
openpolar |
spelling |
ftunivnorthcag:oai:libres.uncg.edu/3510 2024-02-11T10:00:45+01:00 The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake Gentzel, Tracy NC DOCKS at The University of North Carolina at Greensboro 2010 http://libres.uncg.edu/ir/uncg/f/Gentzel_uncg_0154M_10401.pdf English eng http://libres.uncg.edu/ir/uncg/f/Gentzel_uncg_0154M_10401.pdf Chironomus $x Larvae $x Metabolism Methane $x Research Carbon Lake ecology $z Arctic regions 2010 ftunivnorthcag 2024-01-27T23:44:22Z Up to 40% of methane produced in aquatic systems is oxidized before it is released into the atmosphere. Microbial oxidation of methane is an important sink and potentially an important pathway for the incorporation of detrital carbon into aquatic food webs. In this study, we tested the hypothesis that methane-derived carbon was an important carbon source for Chironomus larvae in a small arctic lake, but that utilization of methane-derived carbon by larvae differed with depth. We found that an order of magnitude more methane was produced at 5m than at 2m. PCR analysis of sediments, found a greater quantity of methanogen DNA at 5m than at 2m, while methanotroph DNA was less common in sediments except for surface sediments. Larval tubes showed a unique composition of methanogen and methanotroph communities when compared to surrounding sediments. A surprisingly larger abundance of methanogens was found in larval hindguts than larval foreguts of Chironomus from deeper sediments. The presence of methanogens and methanotrophs within the larval guts in addition to their depleted d13C signature is consistent with our hypothesis that methane-derived carbon is an important basal food resource in this small lake. Furthermore, the combination of biogeochemical and microbial approaches provides insight into functional differences among habitats for a ubiquitous benthic consumer. Other/Unknown Material Arctic University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Carbon Lake ENVELOPE(-122.575,-122.575,55.969,55.969) |
institution |
Open Polar |
collection |
University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) |
op_collection_id |
ftunivnorthcag |
language |
English |
topic |
Chironomus $x Larvae $x Metabolism Methane $x Research Carbon Lake ecology $z Arctic regions |
spellingShingle |
Chironomus $x Larvae $x Metabolism Methane $x Research Carbon Lake ecology $z Arctic regions Gentzel, Tracy NC DOCKS at The University of North Carolina at Greensboro The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake |
topic_facet |
Chironomus $x Larvae $x Metabolism Methane $x Research Carbon Lake ecology $z Arctic regions |
description |
Up to 40% of methane produced in aquatic systems is oxidized before it is released into the atmosphere. Microbial oxidation of methane is an important sink and potentially an important pathway for the incorporation of detrital carbon into aquatic food webs. In this study, we tested the hypothesis that methane-derived carbon was an important carbon source for Chironomus larvae in a small arctic lake, but that utilization of methane-derived carbon by larvae differed with depth. We found that an order of magnitude more methane was produced at 5m than at 2m. PCR analysis of sediments, found a greater quantity of methanogen DNA at 5m than at 2m, while methanotroph DNA was less common in sediments except for surface sediments. Larval tubes showed a unique composition of methanogen and methanotroph communities when compared to surrounding sediments. A surprisingly larger abundance of methanogens was found in larval hindguts than larval foreguts of Chironomus from deeper sediments. The presence of methanogens and methanotrophs within the larval guts in addition to their depleted d13C signature is consistent with our hypothesis that methane-derived carbon is an important basal food resource in this small lake. Furthermore, the combination of biogeochemical and microbial approaches provides insight into functional differences among habitats for a ubiquitous benthic consumer. |
author |
Gentzel, Tracy NC DOCKS at The University of North Carolina at Greensboro |
author_facet |
Gentzel, Tracy NC DOCKS at The University of North Carolina at Greensboro |
author_sort |
Gentzel, Tracy |
title |
The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake |
title_short |
The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake |
title_full |
The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake |
title_fullStr |
The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake |
title_full_unstemmed |
The effects of methane producers and consumers on the diet of Chironomus larvae in an Arctic lake |
title_sort |
effects of methane producers and consumers on the diet of chironomus larvae in an arctic lake |
publishDate |
2010 |
url |
http://libres.uncg.edu/ir/uncg/f/Gentzel_uncg_0154M_10401.pdf |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) ENVELOPE(-122.575,-122.575,55.969,55.969) |
geographic |
Arctic Arctic Lake Carbon Lake |
geographic_facet |
Arctic Arctic Lake Carbon Lake |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://libres.uncg.edu/ir/uncg/f/Gentzel_uncg_0154M_10401.pdf |
_version_ |
1790596457989931008 |