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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ftmdpi:oai:mdpi.com:/2218-273X/9/9/487/ 2023-08-20T04:10:03+02:00 Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs Megumu Fujibayashi Yoshie Miura Reina Suganuma Shinji Takahashi Takashi Sakamaki Naoyuki Miyata So Kazama agris 2019-09-13 application/pdf https://doi.org/10.3390/biom9090487 EN eng Multidisciplinary Digital Publishing Institute Natural and Bio-inspired Molecules https://dx.doi.org/10.3390/biom9090487 https://creativecommons.org/licenses/by/4.0/ Biomolecules; Volume 9; Issue 9; Pages: 487 fatty acids dietary sources allochthonous Salvelinus leucomaenis Text 2019 ftmdpi https://doi.org/10.3390/biom9090487 2023-07-31T22:36:30Z 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 MDPI Open Access Publishing Biomolecules 9 9 487 |
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Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
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fatty acids dietary sources allochthonous Salvelinus leucomaenis |
spellingShingle |
fatty acids dietary sources allochthonous Salvelinus leucomaenis Megumu Fujibayashi Yoshie Miura Reina Suganuma Shinji Takahashi Takashi Sakamaki Naoyuki Miyata So Kazama Origin of Carbon and Essential Fatty Acids in Higher Trophic Level Fish in Headwater Stream Food Webs |
topic_facet |
fatty acids dietary sources allochthonous Salvelinus leucomaenis |
description |
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 |
Megumu Fujibayashi Yoshie Miura Reina Suganuma Shinji Takahashi Takashi Sakamaki Naoyuki Miyata So Kazama |
author_facet |
Megumu Fujibayashi Yoshie Miura Reina Suganuma Shinji Takahashi Takashi Sakamaki Naoyuki Miyata So Kazama |
author_sort |
Megumu Fujibayashi |
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 |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/biom9090487 |
op_coverage |
agris |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Biomolecules; Volume 9; Issue 9; Pages: 487 |
op_relation |
Natural and Bio-inspired Molecules https://dx.doi.org/10.3390/biom9090487 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/biom9090487 |
container_title |
Biomolecules |
container_volume |
9 |
container_issue |
9 |
container_start_page |
487 |
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1774723950496972800 |