The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem
Stable isotopes such as δ13C and δ15N are routinely used in trophic ecology as isotope values are derived from diet and recorded subsequent fractionation in consumer tissue. However, this approach necessitates to estimate a priori the fractionation between food source and consumer leading to potenti...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Ecological Indicators |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X23002509 |
| _version_ | 1827985709686849536 |
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| author | Pierre-Yves Pascal Hidetaka Nomaki Yosuke Miyairi Yusuke Yokoyama |
| author_facet | Pierre-Yves Pascal Hidetaka Nomaki Yosuke Miyairi Yusuke Yokoyama |
| author_sort | Pierre-Yves Pascal |
| collection | DOAJ |
| description | Stable isotopes such as δ13C and δ15N are routinely used in trophic ecology as isotope values are derived from diet and recorded subsequent fractionation in consumer tissue. However, this approach necessitates to estimate a priori the fractionation between food source and consumer leading to potential uncertainties. In this context, the development of additional biomarkers enables to have better resolution on feeding habits. Dissolved Inorganic Carbon (DIC) from volcanic activity and bacteria using this DIC presents a strongly depleted natural radiocarbon abundances (Δ14C). Through its activity, the geothermal plant of Bouillante in Guadeloupe (French West Indies) releases sulfur bacteria in shallow environment of the Bay. A previous study reveals ingestion of those bacteria by opportunist species (sea urchin and fish species). In the present study, ten species with different diet and feeding mode were sampled close to the release channel of the geothermal plant and in a control station in order to simultaneously determine their stable isotopes (δ13C and δ15N) and radiocarbon compositions. Compared to models using Δ14C data, models using δ13C and δ15N data underestimate the role of bacteria in diet of urchin and fish species whereas this role is overestimated for all other species. Compared to previous models, radiocarbon would give more realistic and reliable results than the classical use of stable isotope. This study confirms the utility of radiocarbon in food web ecology, particularly at the ecosystems having food sources with contrasting Δ14C values. |
| first_indexed | 2024-04-09T23:19:53Z |
| format | Article |
| id | doaj.art-9dc21549829e416f97ebcccdd0a1d6b1 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-04-09T23:19:53Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-9dc21549829e416f97ebcccdd0a1d6b12023-03-22T04:36:18ZengElsevierEcological Indicators1470-160X2023-04-01148110108The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystemPierre-Yves Pascal0Hidetaka Nomaki1Yosuke Miyairi2Yusuke Yokoyama3Institut de Systématique, Evolution, Biodiversité (ISYEB) UMR 7205, Equipe Biologie de la Mangrove -Université des Antilles, 97159 Pointe-à-Pitre, Guadeloupe, France; Corresponding author.X-Star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Kanagawa 237-0061, JapanAtmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, JapanAtmosphere and Ocean Research Institute, The University of Tokyo, Chiba 277-8564, Japan; Biogeochemistry Research Center (BGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237-0061, Japan; Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Hongo 113-0033, Japan; Graduate Program on Environmental Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Komaba 153-8902, Japan; Research School of Physics, The Australian National University, Canberra ACT, 2601 AustraliaStable isotopes such as δ13C and δ15N are routinely used in trophic ecology as isotope values are derived from diet and recorded subsequent fractionation in consumer tissue. However, this approach necessitates to estimate a priori the fractionation between food source and consumer leading to potential uncertainties. In this context, the development of additional biomarkers enables to have better resolution on feeding habits. Dissolved Inorganic Carbon (DIC) from volcanic activity and bacteria using this DIC presents a strongly depleted natural radiocarbon abundances (Δ14C). Through its activity, the geothermal plant of Bouillante in Guadeloupe (French West Indies) releases sulfur bacteria in shallow environment of the Bay. A previous study reveals ingestion of those bacteria by opportunist species (sea urchin and fish species). In the present study, ten species with different diet and feeding mode were sampled close to the release channel of the geothermal plant and in a control station in order to simultaneously determine their stable isotopes (δ13C and δ15N) and radiocarbon compositions. Compared to models using Δ14C data, models using δ13C and δ15N data underestimate the role of bacteria in diet of urchin and fish species whereas this role is overestimated for all other species. Compared to previous models, radiocarbon would give more realistic and reliable results than the classical use of stable isotope. This study confirms the utility of radiocarbon in food web ecology, particularly at the ecosystems having food sources with contrasting Δ14C values.http://www.sciencedirect.com/science/article/pii/S1470160X23002509δ13Cδ15NΔ14CDietSulfur bacteriaFood web |
| spellingShingle | Pierre-Yves Pascal Hidetaka Nomaki Yosuke Miyairi Yusuke Yokoyama The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem Ecological Indicators δ13C δ15N Δ14C Diet Sulfur bacteria Food web |
| title | The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem |
| title_full | The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem |
| title_fullStr | The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem |
| title_full_unstemmed | The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem |
| title_short | The use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem |
| title_sort | use of radiocarbon to evaluate the trophic role of geothermal bacteria in shallow hydrothermal water ecosystem |
| topic | δ13C δ15N Δ14C Diet Sulfur bacteria Food web |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X23002509 |
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