Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs
Dietary carbon sources in headwater stream food webs are divided into allochthonous and autochthonous organic matters. We hypothesized that: 1) the dietary allochthonous contribution for fish in headwater stream food webs positively relate with canopy cover; and 2) essential fatty acids originate fr...
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ftpubmed:oai:pubmedcentral.nih.gov:6770133 2023-05-15T18:28:27+02:00 Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs Fujibayashi, Megumu Miura, Yoshie Suganuma, Reina Takahashi, Shinji Sakamaki, Takashi Miyata, Naoyuki Kazama, So 2019-09-13 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770133/ http://www.ncbi.nlm.nih.gov/pubmed/31540333 https://doi.org/10.3390/biom9090487 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770133/ http://www.ncbi.nlm.nih.gov/pubmed/31540333 http://dx.doi.org/10.3390/biom9090487 © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Article Text 2019 ftpubmed https://doi.org/10.3390/biom9090487 2019-11-03T01:38:55Z Dietary carbon sources in headwater stream food webs are divided into allochthonous and autochthonous organic matters. We hypothesized that: 1) the dietary allochthonous contribution for fish in headwater stream food webs positively relate with canopy cover; and 2) essential fatty acids originate from autochthonous organic matter regardless of canopy covers, because essential fatty acids, such as 20:5ω3 and 22:6ω3, are normally absent in allochthonous organic matters. We investigated predatory fish Salvelinus leucomaenis stomach contents in four headwater stream systems, which are located in subarctic region in northern Japan. In addition, stable carbon and nitrogen isotope ratios, fatty acid profile, and stable carbon isotope ratios of essential fatty acids were analyzed. Bulk stable carbon analysis showed the major contribution of autochthonous sources to assimilated carbon in S. leucomaenis. Surface baits in the stomach had intermediate stable carbon isotope ratios between autochthonous and allochthonous organic matter, indicating aquatic carbon was partly assimilated by surface baits. Stable carbon isotope ratios of essential fatty acids showed a positive relationship between autochthonous sources and S. leucomaenis across four study sites. This study demonstrated that the main supplier of dietary carbon and essential fatty acids was autochthonous organic matter even in headwater stream ecosystems under high canopy cover. Text Subarctic PubMed Central (PMC) Biomolecules 9 9 487 |
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Article Fujibayashi, Megumu Miura, Yoshie Suganuma, Reina Takahashi, Shinji Sakamaki, Takashi Miyata, Naoyuki Kazama, So Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs |
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Dietary carbon sources in headwater stream food webs are divided into allochthonous and autochthonous organic matters. We hypothesized that: 1) the dietary allochthonous contribution for fish in headwater stream food webs positively relate with canopy cover; and 2) essential fatty acids originate from autochthonous organic matter regardless of canopy covers, because essential fatty acids, such as 20:5ω3 and 22:6ω3, are normally absent in allochthonous organic matters. We investigated predatory fish Salvelinus leucomaenis stomach contents in four headwater stream systems, which are located in subarctic region in northern Japan. In addition, stable carbon and nitrogen isotope ratios, fatty acid profile, and stable carbon isotope ratios of essential fatty acids were analyzed. Bulk stable carbon analysis showed the major contribution of autochthonous sources to assimilated carbon in S. leucomaenis. Surface baits in the stomach had intermediate stable carbon isotope ratios between autochthonous and allochthonous organic matter, indicating aquatic carbon was partly assimilated by surface baits. Stable carbon isotope ratios of essential fatty acids showed a positive relationship between autochthonous sources and S. leucomaenis across four study sites. This study demonstrated that the main supplier of dietary carbon and essential fatty acids was autochthonous organic matter even in headwater stream ecosystems under high canopy cover. |
format |
Text |
author |
Fujibayashi, Megumu Miura, Yoshie Suganuma, Reina Takahashi, Shinji Sakamaki, Takashi Miyata, Naoyuki Kazama, So |
author_facet |
Fujibayashi, Megumu Miura, Yoshie Suganuma, Reina Takahashi, Shinji Sakamaki, Takashi Miyata, Naoyuki Kazama, So |
author_sort |
Fujibayashi, Megumu |
title |
Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs |
title_short |
Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs |
title_full |
Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs |
title_fullStr |
Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs |
title_full_unstemmed |
Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs |
title_sort |
origin of carbon and essential fatty acids in higher trophic level fish in headwater stream food webs |
publisher |
MDPI |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770133/ http://www.ncbi.nlm.nih.gov/pubmed/31540333 https://doi.org/10.3390/biom9090487 |
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Subarctic |
genre_facet |
Subarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770133/ http://www.ncbi.nlm.nih.gov/pubmed/31540333 http://dx.doi.org/10.3390/biom9090487 |
op_rights |
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.3390/biom9090487 |
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Biomolecules |
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9 |
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487 |
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