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Martins MVA, Hohenegger J, Bouchet VMP, Damasceno FL, Costa Santos LG, Mendonça Filho JG, Pereira E, Figueira R, Senez-Mello TM, Castelo WFL, Sousa SHM, Vilela CG, Antonioli L, Damasceno R, Ramos E Silva CA, Frontalini F. Application of benthic foraminiferal indices to infer the Ecological Quality Status in the Sepetiba Bay (SE Brazil). CHEMOSPHERE 2024:143435. [PMID: 39357658 DOI: 10.1016/j.chemosphere.2024.143435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 09/22/2024] [Accepted: 09/27/2024] [Indexed: 10/04/2024]
Abstract
The Sepetiba Bay (SB, SE Brazil) is a highly anthropized and industrialized area that has experienced severe environmental degradation in recent decades. This study applies a multiproxy approach to document the response of living benthic foraminifera to environmental stress and to infer the Ecological Quality Status (EcoQS) in SB. Our methodology involved a comprehensive comparison of the density and percentage of benthic foraminiferal species with physicochemical, textural, and geochemical data, specifically the concentrations of potentially toxic elements (PTEs). We also statistically compared two geochemical indices, the pollution load index (PLI) and the potential ecological risk index (PERI), with two ecological indices, the Tolerant Species Index (TSI) and the Exp(H'bc). The TSI and the Exp(H'bc) indices are significantly correlated with the environmental stressors in Sepetiba Bay, namely the PTEs concentrations (As, Cd, Pb, and Zn). The most tolerant species to the enrichment of PTEs and organic matter are Ammonia tepida (Cushman, 1926), Elphidium excavatum (Terquem, 1875), Ammonia buzasi Hayward and Holzmann, 2021 and Ammonia rolshauseni (Cushman & Bermúdez, 1946). The Exp(H'bc) and TSI reveal that most stations located in the inner zone and near the margins of the bay have poor and bad EcoQS, which agrees with the distribution of the environmental stressors. Thus, the current environmental conditions of the inner area of Sepetiba Bay are of great concern. This work also shows that using the TSI and the Exp(H'bc) indices, it is possible to classify EcoQS in transitional coastal environments in the North and South Atlantic transitional waters. This work has relevant scientific and social implications due to its importance in biomonitoring and the management of the coastal regions.
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Affiliation(s)
- Maria Virgínia Alves Martins
- Universidade do Estado do Rio de Janeiro, UERJ, Av. São Francisco Xavier, 524, Maracanã. CEP: 20550-013 Rio de Janeiro, RJ, Brazil; Universidade de Aveiro, GeoBioTec, Departamento de Geociências, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Johann Hohenegger
- Universität Wien, Institut für Paläontologie, Josef Holoubek Platz 2, 1090 Wien, Austria.
| | - Vincent M P Bouchet
- Université de Lille, CNRS, IRD, Université Littoral Côte d'Opale, UMR 8187, LOG, Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, F 59000 Lille, France.
| | - Fabrício Leandro Damasceno
- Universidade do Estado do Rio de Janeiro, UERJ, Av. São Francisco Xavier, 524, Maracanã. CEP: 20550-013 Rio de Janeiro, RJ, Brazil.
| | | | | | - Egberto Pereira
- Universidade do Estado do Rio de Janeiro, UERJ, Av. São Francisco Xavier, 524, Maracanã. CEP: 20550-013 Rio de Janeiro, RJ, Brazil.
| | - Rubens Figueira
- Instituto Oceanográfico, Universidade de São Paulo (IOUSP). Address: Pça. do Oceanográfico, 191, Butantã, São Paulo, Brazil. Zip code: 05508 120.
| | - Thaise M Senez-Mello
- Universidade do Estado do Rio de Janeiro, UERJ, Av. São Francisco Xavier, 524, Maracanã. CEP: 20550-013 Rio de Janeiro, RJ, Brazil; Marine Geology Lab - LAGEMAR, Federal Fluminense University (UFF), Rio de Janeiro, Brazil.
| | - Wellen Fernanda Louzada Castelo
- Universidade do Estado do Rio de Janeiro, UERJ, Av. São Francisco Xavier, 524, Maracanã. CEP: 20550-013 Rio de Janeiro, RJ, Brazil.
| | - Silvia Helena Mello Sousa
- Instituto Oceanográfico, Universidade de São Paulo (IOUSP). Address: Pça. do Oceanográfico, 191, Butantã, São Paulo, Brazil. Zip code: 05508 120.
| | | | - Luzia Antonioli
- Universidade do Estado do Rio de Janeiro, UERJ, Av. São Francisco Xavier, 524, Maracanã. CEP: 20550-013 Rio de Janeiro, RJ, Brazil.
| | - Raimundo Damasceno
- Water and Biomass Research Center - NAB, Fluminense Federal University, Niteroi, Brazil.
| | | | - Fabrizio Frontalini
- Department of Pure and Applied Sciences, Università degli Studi di Urbino "Carlo Bo", 61029, Urbino, Italy.
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2
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Song Q, Zhao F, Hou L, Miao M. Cellular interactions and evolutionary origins of endosymbiotic relationships with ciliates. THE ISME JOURNAL 2024; 18:wrae117. [PMID: 38916437 PMCID: PMC11253213 DOI: 10.1093/ismejo/wrae117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/26/2024] [Accepted: 06/21/2024] [Indexed: 06/26/2024]
Abstract
As unicellular predators, ciliates engage in close associations with diverse microbes, laying the foundation for the establishment of endosymbiosis. Originally heterotrophic, ciliates demonstrate the ability to acquire phototrophy by phagocytizing unicellular algae or by sequestering algal plastids. This adaptation enables them to gain photosynthate and develop resistance to unfavorable environmental conditions. The integration of acquired phototrophy with intrinsic phagotrophy results in a trophic mode known as mixotrophy. Additionally, ciliates can harbor thousands of bacteria in various intracellular regions, including the cytoplasm and nucleus, exhibiting species specificity. Under prolonged and specific selective pressure within hosts, bacterial endosymbionts evolve unique lifestyles and undergo particular reductions in metabolic activities. Investigating the research advancements in various endosymbiotic cases within ciliates will contribute to elucidate patterns in cellular interaction and unravel the evolutionary origins of complex traits.
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Affiliation(s)
- Qi Song
- Medical School, University of Chinese Academy of Sciences, No. 1 Yanqihu East Road, Huairou District, Beijing 100049, China
| | - Fangqing Zhao
- Medical School, University of Chinese Academy of Sciences, No. 1 Yanqihu East Road, Huairou District, Beijing 100049, China
- Institute of Zoology, Chinese Academy of Sciences, 1 Beichen West Road, Chaoyang District, Beijing 100101, China
- Key Laboratory of Systems Health Science of Zhejiang Province, School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, No. 1 Xiangshan Road, Hangzhou 310024, China
| | - Lina Hou
- Medical School, University of Chinese Academy of Sciences, No. 1 Yanqihu East Road, Huairou District, Beijing 100049, China
| | - Miao Miao
- Medical School, University of Chinese Academy of Sciences, No. 1 Yanqihu East Road, Huairou District, Beijing 100049, China
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3
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Morin F, Panova MAZ, Schweizer M, Wiechmann M, Eliassen N, Sundberg P, Cluzel-Burgalat L, Polovodova Asteman I. Hidden aliens: Application of digital PCR to track an exotic foraminifer across the Skagerrak (North Sea) correlates well with traditional morphospecies analysis. Environ Microbiol 2023; 25:2321-2337. [PMID: 37393907 DOI: 10.1111/1462-2920.16458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 06/14/2023] [Indexed: 07/04/2023]
Abstract
The problem of invasive species is a well-studied one, but knowledge of free-living unicellular eukaryotic invasive species is lacking. A potentially invasive foraminifer (Rhizaria), Nonionella sp. T1, was recently discovered in the Skagerrak and its fjords. Digital polymerase chain reaction (dPCR) was applied to track the spread of this non-indigenous species using a new dPCR assay (T1-1). The use of dPCR appears highly complementary to traditional hand picking of foraminiferal shells from the sediment, and is far less time-consuming. This study indicates that Nonionella sp. T1 has bypassed the outer Skagerrak strait, instead becoming established in Swedish west coast fjords, constituting up to half of the living foraminiferal community in fjord mouth areas. The ecology of Nonionella sp. T1 and its potential invasive impacts are still largely unknown, but it appears to be an opportunist using several energy sources such as nitrate respiration and kleptoplasty along with a possibly more efficient reproductive strategy to gain an advantage over the native foraminiferal species. Future ecological studies of Nonionella sp. T1 could be aided by dPCR and the novel Nonionella sp. T1-specific T1-1 assay.
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Affiliation(s)
- Filip Morin
- Department of Marine Science, University of Gothenburg, Gothenburg, Sweden
| | - Marina Antonina Zoe Panova
- Department of Marine Science, University of Gothenburg, Gothenburg, Sweden
- SeAnalytics AB, Gothenburg, Sweden
| | - Magali Schweizer
- Laboratory of Planetology and Geosciences (LPG) UMR6112, University of Angers, CNRS, Angers, France
- Laboratory of Planetology and Geosciences (LPG), Nantes University, CNRS, Nantes, France
- Laboratory of Planetology and Geosciences (LPG), Le Mans University, CNRS, Le Mans, France
| | - Marlene Wiechmann
- Department of Marine Science, University of Gothenburg, Gothenburg, Sweden
| | - Nicole Eliassen
- Department of Marine Science, University of Gothenburg, Gothenburg, Sweden
| | - Per Sundberg
- Department of Marine Science, University of Gothenburg, Gothenburg, Sweden
- SeAnalytics AB, Gothenburg, Sweden
| | | | - Irina Polovodova Asteman
- Department of Marine Science, University of Gothenburg, Gothenburg, Sweden
- Gothenburg Global Biodiversity Centre, University of Gothenburg, Gothenburg, Sweden
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4
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Pinko D, Abramovich S, Rahav E, Belkin N, Rubin-Blum M, Kucera M, Morard R, Holzmann M, Abdu U. Shared ancestry of algal symbiosis and chloroplast sequestration in foraminifera. SCIENCE ADVANCES 2023; 9:eadi3401. [PMID: 37824622 PMCID: PMC10569721 DOI: 10.1126/sciadv.adi3401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 09/07/2023] [Indexed: 10/14/2023]
Abstract
Foraminifera are unicellular organisms that established the most diverse algal symbioses in the marine realm. Endosymbiosis repeatedly evolved in several lineages, while some engaged in the sequestration of chloroplasts, known as kleptoplasty. So far, kleptoplasty has been documented exclusively in the rotaliid clade. Here, we report the discovery of kleptoplasty in the species Hauerina diversa that belongs to the miliolid clade. The existence of kleptoplasty in the two main clades suggests that it is more widespread than previously documented. We observed chloroplasts in clustered structures within the foraminiferal cytoplasm and confirmed their functionality. Phylogenetic analysis of 18S ribosomal RNA gene sequences showed that H. diversa branches next to symbiont-bearing Alveolinidae. This finding represents evidence of of a relationship between kleptoplastic and symbiotic foraminifera.. Analysis of ribosomal genes and metagenomics revealed that alveolinid symbionts and kleptoplasts belong to the same clade, which suggests a common ancestry.
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Affiliation(s)
- Doron Pinko
- Department of Earth and Environmental Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Sigal Abramovich
- Department of Earth and Environmental Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Eyal Rahav
- National Institute of Oceanography, Israel Oceanographic and Limnological Research, Haifa, Israel
| | - Natalia Belkin
- National Institute of Oceanography, Israel Oceanographic and Limnological Research, Haifa, Israel
| | - Maxim Rubin-Blum
- National Institute of Oceanography, Israel Oceanographic and Limnological Research, Haifa, Israel
| | - Michal Kucera
- MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
| | - Raphaël Morard
- MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
| | - Maria Holzmann
- Department of Genetics and Evolution, University of Geneva, Quai Ernest Ansermet 30, Geneva 4 1211, Switzerland
| | - Uri Abdu
- Department of Life Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
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5
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Bouchet VMP, Seuront L, Tsujimoto A, Richirt J, Frontalini F, Tsuchiya M, Matsuba M, Nomaki H. Foraminifera and plastic pollution: Knowledge gaps and research opportunities. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 324:121365. [PMID: 36858101 DOI: 10.1016/j.envpol.2023.121365] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/19/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
Plastic has become one of the most ubiquitous and environmentally threatening sources of pollution in the Anthropocene. Beyond the conspicuous visual impact and physical damages, plastics both carry and release a cocktail of harmful chemicals, such as monomers, additives and persistent organic pollutants. Here we show through a review of the scientific literature dealing with both plastic pollution and benthic foraminifera (Rhizaria), that despite their critical roles in the structure and function of benthic ecosystems, only 0.4% of studies have investigated the effects of micro- and nano-plastics on this group. Consequently, we urge to consider benthic foraminifera in plastic pollution studies via a tentative roadmap that includes (i) the use of their biological, physiological and behavioral responses that may unveil the effects of microplastics and nanoplastics and (ii) the evaluation of the indicative value of foraminiferal species to serve as proxies for the degree of pollution. This appears particularly timely in the context of the development of management strategies to restore coastal ecosystems.
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Affiliation(s)
- Vincent M P Bouchet
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR8187, LOG, Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, 59000, Lille, France.
| | - Laurent Seuront
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR8187, LOG, Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, 59000, Lille, France; Department of Marine Energy and Resource, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan; Department of Zoology and Entomology, Rhodes University, Grahamstown, 6140, South Africa
| | - Akira Tsujimoto
- Faculty of Education, Shimane University, 1060 Nishikawatsu-cho, Matsue-shi, Shimane, 690-8504, Japan
| | - Julien Richirt
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR8187, LOG, Laboratoire d'Océanologie et de Géosciences, Station Marine de Wimereux, 59000, Lille, France; X-star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Fabrizio Frontalini
- Department of Pure and Applied Sciences, Urbino University, 61029, Urbino, Italy
| | - Masashi Tsuchiya
- Research Institute for Global Change (RIGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
| | - Misako Matsuba
- Biodiversity Division, National Institute of Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Hidetaka Nomaki
- X-star, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
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6
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Schweizer M, Jauffrais T, Choquel C, Méléder V, Quinchard S, Geslin E. Trophic strategies of intertidal foraminifera explored with single-cell microbiome metabarcoding and morphological methods: What is on the menu? Ecol Evol 2022; 12:e9437. [PMID: 36407902 PMCID: PMC9666909 DOI: 10.1002/ece3.9437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 11/18/2022] Open
Abstract
In mudflats, interactions and transfers of nutrients and secondary metabolites may drive ecosystems and biodiversity. Foraminifera have complex trophic strategies as they often rely on bacteria and eukaryotes or on potential symbionts for carbon and nitrogen resources. The capacity of these protists to use a wide range of adaptive mechanisms requires clarifying the relationships between them and their microbial associates. Here, we investigate the interactions of three foraminiferal species with nearby organisms in situ, by coupling molecular (cloning/Sanger and high-throughput sequencing) and direct counting and morphological identification with microscopy. This coupling allows the identification of the organisms found in or around three foraminiferal species through molecular tools combined with a direct counting of foraminifera and diatoms present in situ through microscopy methods. Depending on foraminiferal species, and in addition to diatom biomass, diatom frustule shape, size and species are key factors driving the abundance and diversity of foraminifera in mudflat habitats. Three different trophic strategies were deduced for the foraminifera investigated in this study: Ammonia sp. T6 has an opportunistic strategy and is feeding on bacteria, nematoda, fungi, and diatoms when abundant; Elphidium oceanense is feeding mainly on diatoms, mixed with other preys when they are less abundant; and Haynesina germanica is feeding almost solely on medium-large pennate diatoms. Although there are limitations due to the lack of species coverage in DNA sequence databases and to the difficulty to compare morphological and molecular data, this study highlights the relevance of combining molecular with morphological tools to study trophic interactions and microbiome communities of protists at the single-cell scale.
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Affiliation(s)
- Magali Schweizer
- UMR 6112 LPG, Laboratoire de Planétologie et Géosciences, Univ Angers, Nantes Université, Le Mans UniversitéCNRSAngersFrance
| | - Thierry Jauffrais
- UMR 6112 LPG, Laboratoire de Planétologie et Géosciences, Univ Angers, Nantes Université, Le Mans UniversitéCNRSAngersFrance
- UMR 9220 ENTROPIE, Ifremer, IRD, Univ Nouvelle‐Calédonie, Univ La RéunionCNRSNoumeaNew Caledonia
| | - Constance Choquel
- UMR 6112 LPG, Laboratoire de Planétologie et Géosciences, Univ Angers, Nantes Université, Le Mans UniversitéCNRSAngersFrance
- Department of GeologyLund UniversityLundSweden
| | - Vona Méléder
- UR 2160, ISOMer, Institut des Substances et Organismes de la MerNantes UniversitéNantesFrance
| | - Sophie Quinchard
- UMR 6112 LPG, Laboratoire de Planétologie et Géosciences, Univ Angers, Nantes Université, Le Mans UniversitéCNRSAngersFrance
| | - Emmanuelle Geslin
- UMR 6112 LPG, Laboratoire de Planétologie et Géosciences, Univ Angers, Nantes Université, Le Mans UniversitéCNRSAngersFrance
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7
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Kleptoplast distribution, photosynthetic efficiency and sequestration mechanisms in intertidal benthic foraminifera. THE ISME JOURNAL 2022; 16:822-832. [PMID: 34635793 PMCID: PMC8857221 DOI: 10.1038/s41396-021-01128-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/19/2021] [Accepted: 09/22/2021] [Indexed: 11/19/2022]
Abstract
Foraminifera are ubiquitously distributed in marine habitats, playing a major role in marine sediment carbon sequestration and the nitrogen cycle. They exhibit a wide diversity of feeding and behavioural strategies (heterotrophy, autotrophy and mixotrophy), including species with the ability of sequestering intact functional chloroplasts from their microalgal food source (kleptoplastidy), resulting in a mixotrophic lifestyle. The mechanisms by which kleptoplasts are integrated and kept functional inside foraminiferal cytosol are poorly known. In our study, we investigated relationships between feeding strategies, kleptoplast spatial distribution and photosynthetic functionality in two shallow-water benthic foraminifera (Haynesina germanica and Elphidium williamsoni), both species feeding on benthic diatoms. We used a combination of observations of foraminiferal feeding behaviour, test morphology, cytological TEM-based observations and HPLC pigment analysis, with non-destructive, single-cell level imaging of kleptoplast spatial distribution and PSII quantum efficiency. The two species showed different feeding strategies, with H. germanica removing diatom content at the foraminifer's apertural region and E. williamsoni on the dorsal site. All E. williamsoni parameters showed that this species has higher autotrophic capacity albeit both feeding on benthic diatoms. This might represent two different stages in the evolutionary process of establishing a permanent symbiotic relationship, or may reflect different trophic strategies.
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Pérez-Burillo J, Valoti G, Witkowski A, Prado P, Mann DG, Trobajo R. Assessment of marine benthic diatom communities: insights from a combined morphological-metabarcoding approach in Mediterranean shallow coastal waters. MARINE POLLUTION BULLETIN 2022; 174:113183. [PMID: 35090287 DOI: 10.1016/j.marpolbul.2021.113183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/16/2021] [Accepted: 11/20/2021] [Indexed: 06/14/2023]
Abstract
We investigated the advantages and disadvantages of light microscope (LM)-based identifications and DNA metabarcoding, based on a 312-bp rbcL marker, for examining benthic diatom communities from Mediterranean shallow coastal environments. For this, we used biofilm samples collected from different substrata in the Ebro delta bays. We show that 1) Ebro delta bays harbour high-diversity diatom communities [LM identified 249 taxa] and 2) DNA metabarcoding effectively reflects this diversity at genus- but not species level, because of the incompleteness of the DNA reference library. Nevertheless, DNA metabarcoding offers new opportunities for detecting small, delicate and rare diatom species missed by LM and diatoms that lack silica frustules. The primers used, though designed for diatoms, successfully amplified rarely reported members of other stramenopile groups. Combining LM and DNA approaches offers stronger support for ecological studies of benthic microalgal communities in shallow coastal environments than using either approach on its own.
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Affiliation(s)
- Javier Pérez-Burillo
- IRTA-Institute for Food and Agricultural Research and Technology, Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540 Sant Carles de la Ràpita, Tarragona, Spain; Departament de Geografia, Universitat Rovira i Virgili, C/ Joanot Martorell 15, E43500 Vila-seca, Tarragona, Spain
| | - Greta Valoti
- Università Politecnica delle Marche, Piazza Roma, 22, IT60131 Ancona, Italy
| | - Andrzej Witkowski
- Institute of Marine and Environmental Sciences, University of Szczecin, Mickiewicza 16a, 70-383 Szczecin, Poland
| | - Patricia Prado
- IRTA-Institute for Food and Agricultural Research and Technology, Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540 Sant Carles de la Ràpita, Tarragona, Spain
| | - David G Mann
- IRTA-Institute for Food and Agricultural Research and Technology, Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540 Sant Carles de la Ràpita, Tarragona, Spain; Royal Botanic Garden Edinburgh, Edinburgh EH3 5LR, Scotland, UK
| | - Rosa Trobajo
- IRTA-Institute for Food and Agricultural Research and Technology, Marine and Continental Waters Programme, Ctra de Poble Nou Km 5.5, E43540 Sant Carles de la Ràpita, Tarragona, Spain.
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9
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Salonen IS, Chronopoulou PM, Nomaki H, Langlet D, Tsuchiya M, Koho KA. 16S rRNA Gene Metabarcoding Indicates Species-Characteristic Microbiomes in Deep-Sea Benthic Foraminifera. Front Microbiol 2021; 12:694406. [PMID: 34385987 PMCID: PMC8353385 DOI: 10.3389/fmicb.2021.694406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/06/2021] [Indexed: 11/13/2022] Open
Abstract
Foraminifera are unicellular eukaryotes that are an integral part of benthic fauna in many marine ecosystems, including the deep sea, with direct impacts on benthic biogeochemical cycles. In these systems, different foraminiferal species are known to have a distinct vertical distribution, i.e., microhabitat preference, which is tightly linked to the physico-chemical zonation of the sediment. Hence, foraminifera are well-adapted to thrive in various conditions, even under anoxia. However, despite the ecological and biogeochemical significance of foraminifera, their ecology remains poorly understood. This is especially true in terms of the composition and diversity of their microbiome, although foraminifera are known to harbor diverse endobionts, which may have a significant meaning to each species' survival strategy. In this study, we used 16S rRNA gene metabarcoding to investigate the microbiomes of five different deep-sea benthic foraminiferal species representing differing microhabitat preferences. The microbiomes of these species were compared intra- and inter-specifically, as well as with the surrounding sediment bacterial community. Our analysis indicated that each species was characterized with a distinct, statistically different microbiome that also differed from the surrounding sediment community in terms of diversity and dominant bacterial groups. We were also able to distinguish specific bacterial groups that seemed to be strongly associated with particular foraminiferal species, such as the family Marinilabiliaceae for Chilostomella ovoidea and the family Hyphomicrobiaceae for Bulimina subornata and Bulimina striata. The presence of bacterial groups that are tightly associated to a certain foraminiferal species implies that there may exist unique, potentially symbiotic relationships between foraminifera and bacteria that have been previously overlooked. Furthermore, the foraminifera contained chloroplast reads originating from different sources, likely reflecting trophic preferences and ecological characteristics of the different species. This study demonstrates the potential of 16S rRNA gene metabarcoding in resolving the microbiome composition and diversity of eukaryotic unicellular organisms, providing unique in situ insights into enigmatic deep-sea ecosystems.
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Affiliation(s)
- Iines S Salonen
- Ecosystems and Environment Research Program, University of Helsinki, Helsinki, Finland.,SUGAR, X-star, Japan Agency of Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | | | - Hidetaka Nomaki
- SUGAR, X-star, Japan Agency of Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Dewi Langlet
- SUGAR, X-star, Japan Agency of Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan.,UMR 8187 - LOG - Laboratoire d'Océanologie et de Géosciences, Université de Lille - CNRS, Université du Littoral Côte d'Opale, Station Marine de Wimereux, Lille, France.,Evolution, Cell Biology, and Symbiosis Unit, Okinawa Institute of Science and Technology, Okinawa, Japan
| | - Masashi Tsuchiya
- Research Institute for Global Change (RIGC), Japan Agency of Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan
| | - Karoliina A Koho
- Ecosystems and Environment Research Program, University of Helsinki, Helsinki, Finland
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10
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Gomaa F, Utter DR, Powers C, Beaudoin DJ, Edgcomb VP, Filipsson HL, Hansel CM, Wankel SD, Zhang Y, Bernhard JM. Multiple integrated metabolic strategies allow foraminiferan protists to thrive in anoxic marine sediments. SCIENCE ADVANCES 2021; 7:7/22/eabf1586. [PMID: 34039603 PMCID: PMC8153729 DOI: 10.1126/sciadv.abf1586] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 04/05/2021] [Indexed: 05/14/2023]
Abstract
Oceanic deoxygenation is increasingly affecting marine ecosystems; many taxa will be severely challenged, yet certain nominally aerobic foraminifera (rhizarian protists) thrive in oxygen-depleted to anoxic, sometimes sulfidic, sediments uninhabitable to most eukaryotes. Gene expression analyses of foraminifera common to severely hypoxic or anoxic sediments identified metabolic strategies used by this abundant taxon. In field-collected and laboratory-incubated samples, foraminifera expressed denitrification genes regardless of oxygen regime with a putative nitric oxide dismutase, a characteristic enzyme of oxygenic denitrification. A pyruvate:ferredoxin oxidoreductase was highly expressed, indicating the capability for anaerobic energy generation during exposure to hypoxia and anoxia. Near-complete expression of a diatom's plastid genome in one foraminiferal species suggests kleptoplasty or sequestration of functional plastids, conferring a metabolic advantage despite the host living far below the euphotic zone. Through a unique integration of functions largely unrecognized among "typical" eukaryotes, benthic foraminifera represent winning microeukaryotes in the face of ongoing oceanic deoxygenation.
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Affiliation(s)
- Fatma Gomaa
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
| | - Daniel R Utter
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
| | - Christopher Powers
- Department of Cell and Molecular Biology, College of the Environment and Life Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - David J Beaudoin
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | - Virginia P Edgcomb
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | | | - Colleen M Hansel
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | - Scott D Wankel
- Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
| | - Ying Zhang
- Department of Cell and Molecular Biology, College of the Environment and Life Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Joan M Bernhard
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
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11
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Nomaki H, Chen C, Oda K, Tsuchiya M, Tame A, Uematsu K, Isobe N. Abundant Chitinous Structures in Chilostomella (Foraminifera, Rhizaria) and Their Potential Functions. J Eukaryot Microbiol 2021; 68:e12828. [PMID: 33128276 PMCID: PMC7894498 DOI: 10.1111/jeu.12828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 08/28/2020] [Accepted: 10/20/2020] [Indexed: 12/01/2022]
Abstract
Benthic foraminifera, members of Rhizaria, inhabit a broad range of marine environments and are particularly common in hypoxic sediments. The biology of benthic foraminifera is key to understanding benthic ecosystems and relevant biogeochemical cycles, especially in hypoxic environments. Chilostomella is a foraminiferal genus commonly found in hypoxic deep-sea sediments and has poorly understood ecological characteristics. For example, the carbon isotopic compositions of their lipids are substantially different from other co-occurring genera, probably reflecting unique features of its metabolism. Here, we investigated the cytoplasmic and ultrastructural features of Chilostomella ovoidea from bathyal sediments of Sagami Bay, Japan, based on serial semi-thin sections examined using an optical microscope followed by a three-dimensional reconstruction, combined with TEM observations of ultra-thin sections. Observations by TEM revealed the presence of abundant electron-dense structures dividing the cytoplasm. Based on histochemical staining, these structures are shown to be composed of chitin. Our 3D reconstruction revealed chitinous structures in the final seven chambers. These exhibited a plate-like morphology in the final chambers but became rolled up in earlier chambers (toward the proloculus). These chitinous, plate-like structures may function to partition the cytoplasm in a chamber to increase the surface/volume ratio and/or act as a reactive site for some metabolic functions.
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Affiliation(s)
- Hidetaka Nomaki
- SUGAR, X‐starJapan Agency for Marine‐Earth Science and Technology (JAMSTEC)2‐15 Natsushima‐choYokosukaKanagawa237‐0061Japan
| | - Chong Chen
- SUGAR, X‐starJapan Agency for Marine‐Earth Science and Technology (JAMSTEC)2‐15 Natsushima‐choYokosukaKanagawa237‐0061Japan
| | - Kaya Oda
- SUGAR, X‐starJapan Agency for Marine‐Earth Science and Technology (JAMSTEC)2‐15 Natsushima‐choYokosukaKanagawa237‐0061Japan
| | - Masashi Tsuchiya
- Research Institute for Global Change (RIGC)Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)YokosukaKanagawa
237‐0061Japan
| | - Akihiro Tame
- Marine Works Japan Ltd.3‐54‐1 Oppamahigashi‐choYokosukaKanagawa237‐0063Japan
| | - Katsuyuki Uematsu
- Marine Works Japan Ltd.3‐54‐1 Oppamahigashi‐choYokosukaKanagawa237‐0063Japan
| | - Noriyuki Isobe
- Research Institute for Marine Resources Utilization (MRU)Japan Agency for Marine‐Earth Science and Technology (JAMSTEC)YokosukaKanagawa237‐0061Japan
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12
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Bird C, LeKieffre C, Jauffrais T, Meibom A, Geslin E, Filipsson HL, Maire O, Russell AD, Fehrenbacher JS. Heterotrophic Foraminifera Capable of Inorganic Nitrogen Assimilation. Front Microbiol 2020; 11:604979. [PMID: 33343548 PMCID: PMC7744380 DOI: 10.3389/fmicb.2020.604979] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/11/2020] [Indexed: 11/17/2022] Open
Abstract
Nitrogen availability often limits biological productivity in marine systems, where inorganic nitrogen, such as ammonium is assimilated into the food web by bacteria and photoautotrophic eukaryotes. Recently, ammonium assimilation was observed in kleptoplast-containing protists of the phylum foraminifera, possibly via the glutamine synthetase/glutamate synthase (GS/GOGAT) assimilation pathway imported with the kleptoplasts. However, it is not known if the ubiquitous and diverse heterotrophic protists have an innate ability for ammonium assimilation. Using stable isotope incubations (15N-ammonium and 13C-bicarbonate) and combining transmission electron microscopy (TEM) with quantitative nanoscale secondary ion mass spectrometry (NanoSIMS) imaging, we investigated the uptake and assimilation of dissolved inorganic ammonium by two heterotrophic foraminifera; a non-kleptoplastic benthic species, Ammonia sp., and a planktonic species, Globigerina bulloides. These species are heterotrophic and not capable of photosynthesis. Accordingly, they did not assimilate 13C-bicarbonate. However, both species assimilated dissolved 15N-ammonium and incorporated it into organelles of direct importance for ontogenetic growth and development of the cell. These observations demonstrate that at least some heterotrophic protists have an innate cellular mechanism for inorganic ammonium assimilation, highlighting a newly discovered pathway for dissolved inorganic nitrogen (DIN) assimilation within the marine microbial loop.
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Affiliation(s)
- Clare Bird
- Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, United Kingdom.,School of GeoSciences, Grant Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Charlotte LeKieffre
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,UMR CNRS 6112 LPG, Bio-Indicateurs Actuels et Fossiles, Université d'Angers, Angers, France
| | - Thierry Jauffrais
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
| | - Anders Meibom
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,Centre for Advanced Surface Analysis, Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland
| | - Emmanuelle Geslin
- UMR CNRS 6112 LPG, Bio-Indicateurs Actuels et Fossiles, Université d'Angers, Angers, France
| | | | - Olivier Maire
- Université de Bordeaux, EPOC, UMR 5805, Talence, France.,CNRS, EPOC, UMR 5805, Talence, France
| | - Ann D Russell
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA, United States
| | - Jennifer S Fehrenbacher
- College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States
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13
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Coulombier N, Nicolau E, Le Déan L, Barthelemy V, Schreiber N, Brun P, Lebouvier N, Jauffrais T. Effects of Nitrogen Availability on the Antioxidant Activity and Carotenoid Content of the Microalgae Nephroselmis sp. Mar Drugs 2020; 18:E453. [PMID: 32872415 PMCID: PMC7551860 DOI: 10.3390/md18090453] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 02/07/2023] Open
Abstract
Nephroselmis sp. was previously identified as a species of interest for its antioxidant properties owing to its high carotenoid content. In addition, nitrogen availability can impact biomass and specific metabolites' production of microalgae. To optimize parameters of antioxidant production, Nephroselmis sp. was cultivated in batch and continuous culture conditions in stirred closed photobioreactors under different nitrogen conditions (N-repletion, N-limitation, and N-starvation). The aim was to determine the influence of nitrogen availability on the peroxyl radical scavenging activity (oxygen radical absorbance capacity (ORAC) assay) and carotenoid content of Nephroselmis sp. Pigment analysis revealed a specific and unusual photosynthetic system with siphonaxanthin-type light harvesting complexes found in primitive green algae, but also high lutein content and xanthophyll cycle pigments (i.e., violaxanthin, antheraxanthin, and zeaxanthin), as observed in most advanced chlorophytes. The results indicated that N-replete conditions enhance carotenoid biosynthesis, which would correspond to a higher antioxidant capacity measured in Nephroselmis sp. Indeed, peroxyl radical scavenging activity and total carotenoids were higher under N-replete conditions and decreased sharply under N-limitation or starvation conditions. Considering individual carotenoids, siphonaxanthin, neoxanthin, xanthophyll cycle pigments, and lycopene followed the same trend as total carotenoids, while β-carotene and lutein stayed stable regardless of the nitrogen availability. Carotenoid productivities were also higher under N-replete treatment. The peroxyl radical scavenging activity measured with ORAC assay (63.6 to 154.9 µmol TE g-1 DW) and the lutein content (5.22 to 7.97 mg g-1 DW) were within the upper ranges of values reported previously for other microalgae. Furthermore, contents of siphonaxanthin ere 6 to 20% higher than in previous identified sources (siphonous green algae). These results highlight the potential of Nephroselmis sp. as a source of natural antioxidant and as a pigment of interest.
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Affiliation(s)
| | - Elodie Nicolau
- Ifremer, RBE/BRM/LPBA, Rue de l’île d’Yeu, 44311 Nantes, France; (E.N.); (N.S.)
| | - Loïc Le Déan
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 9220 ENTROPIE, BP 32078, 98800 Nouméa, New Caledonia; (L.L.D.); (V.B.); (P.B.); (T.J.)
| | - Vanille Barthelemy
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 9220 ENTROPIE, BP 32078, 98800 Nouméa, New Caledonia; (L.L.D.); (V.B.); (P.B.); (T.J.)
| | - Nathalie Schreiber
- Ifremer, RBE/BRM/LPBA, Rue de l’île d’Yeu, 44311 Nantes, France; (E.N.); (N.S.)
| | - Pierre Brun
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 9220 ENTROPIE, BP 32078, 98800 Nouméa, New Caledonia; (L.L.D.); (V.B.); (P.B.); (T.J.)
| | - Nicolas Lebouvier
- ISEA, EA7484, Université de la Nouvelle Calédonie, Campus de Nouville, 98851 Nouméa, New Caledonia;
| | - Thierry Jauffrais
- Ifremer, IRD, Univ Nouvelle-Calédonie, Univ La Réunion, UMR 9220 ENTROPIE, BP 32078, 98800 Nouméa, New Caledonia; (L.L.D.); (V.B.); (P.B.); (T.J.)
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14
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LeKieffre C, Spero HJ, Fehrenbacher JS, Russell AD, Ren H, Geslin E, Meibom A. Ammonium is the preferred source of nitrogen for planktonic foraminifer and their dinoflagellate symbionts. Proc Biol Sci 2020; 287:20200620. [PMID: 32546098 PMCID: PMC7329048 DOI: 10.1098/rspb.2020.0620] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The symbiotic planktonic foraminifera Orbulina universa inhabits open ocean oligotrophic ecosystems where dissolved nutrients are scarce and often limit biological productivity. It has previously been proposed that O. universa meets its nitrogen (N) requirements by preying on zooplankton, and that its symbiotic dinoflagellates recycle metabolic ‘waste ammonium’ for their N pool. However, these conclusions were derived from bulk 15N-enrichment experiments and model calculations, and our understanding of N assimilation and exchange between the foraminifer host cell and its symbiotic dinoflagellates remains poorly constrained. Here, we present data from pulse-chase experiments with 13C-enriched inorganic carbon, 15N-nitrate, and 15N-ammonium, as well as a 13C- and 15N- enriched heterotrophic food source, followed by TEM (transmission electron microscopy) coupled to NanoSIMS (nanoscale secondary ion mass spectrometry) isotopic imaging to visualize and quantify C and N assimilation and translocation in the symbiotic system. High levels of 15N-labelling were observed in the dinoflagellates and in foraminiferal organelles and cytoplasm after incubation with 15N-ammonium, indicating efficient ammonium assimilation. Only weak 15N-assimilation was observed after incubation with 15N-nitrate. Feeding foraminifers with 13C- and 15N-labelled food resulted in dinoflagellates that were labelled with 15N, thereby confirming the transfer of 15N-compounds from the digestive vacuoles of the foraminifer to the symbiotic dinoflagellates, likely through recycling of ammonium. These observations are important for N isotope-based palaeoceanographic reconstructions, as they show that δ15N values recorded in the organic matrix in symbiotic species likely reflect ammonium recycling rather than alternative N sources, such as nitrates.
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Affiliation(s)
- Charlotte LeKieffre
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland.,UMR CNRS 6112 - LPG-BIAF, Université d'Angers, 49045 Angers Cedex, France
| | - Howard J Spero
- Department of Earth and Planetary Sciences, University of California Davis, Davis, CA 95616, USA
| | - Jennifer S Fehrenbacher
- College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA
| | - Ann D Russell
- Department of Earth and Planetary Sciences, University of California Davis, Davis, CA 95616, USA
| | - Haojia Ren
- Department of Geosciences, National Taiwan University, Taipei, Taiwan
| | - Emmanuelle Geslin
- UMR CNRS 6112 - LPG-BIAF, Université d'Angers, 49045 Angers Cedex, France
| | - Anders Meibom
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland.,Center for Advanced Surface Analysis, Institute of Earth Sciences, University of Lausanne, Switzerland
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15
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Jauffrais T, LeKieffre C, Schweizer M, Jesus B, Metzger E, Geslin E. Response of a kleptoplastidic foraminifer to heterotrophic starvation: photosynthesis and lipid droplet biogenesis. FEMS Microbiol Ecol 2020; 95:5427914. [PMID: 30947330 DOI: 10.1093/femsec/fiz046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 04/02/2019] [Indexed: 01/21/2023] Open
Abstract
The aim of this work is to document the complex nutritional strategy developed by kleptoplastic intertidal foraminifera. We study the mixotrophic ability of a common intertidal foraminifer, Elphidium williamsoni, by (i) investigating the phylogenetic identity of the foraminiferal kleptoplasts, (ii) following their oxygenic photosynthetic capacity and (iii) observing the modification in cellular ultrastructural features in response to photoautotrophic conditions. This was achieved by coupling molecular phylogenetic analyses and TEM observations with non-destructive measurements of kleptoplast O2 production over a 15-day experimental study. Results show that the studied E. williamsoni actively selected kleptoplasts mainly from pennate diatoms and had the ability to produce oxygen, up to 13.4 nmol O2 cell-1 d-1, from low to relatively high irradiance over at least 15 days. Ultrastructural features and photophysiological data showed significant differences over time, the number of lipid droplets, residual bodies and the dark respiration increased; whereas, the number of kleptoplasts decreased accompanied by a minor decrease of the photosynthetic rate. These observations suggest that in E. williamsoni kleptoplasts might provide extra carbon storage through lipid droplets synthesis and highlight the complexity of E. williamsoni feeding strategy and the necessity of further dedicated studies regarding mechanisms developed by kleptoplastidic foraminifera for carbon partitioning and storage.
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Affiliation(s)
- Thierry Jauffrais
- UMR CNRS 6112 LPG-BIAF, Bio-Indicateurs Actuels et Fossiles, Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers CEDEX 1, France.,Ifremer, RBE/LEAD, 101 Promenade Roger Laroque, 98897 Nouméa, New Caledonia, France
| | - Charlotte LeKieffre
- UMR CNRS 6112 LPG-BIAF, Bio-Indicateurs Actuels et Fossiles, Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers CEDEX 1, France
| | - Magali Schweizer
- UMR CNRS 6112 LPG-BIAF, Bio-Indicateurs Actuels et Fossiles, Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers CEDEX 1, France
| | - Bruno Jesus
- EA2160, Laboratoir Mer Molécules Santé, 2 rue de la Houssinière, Université de Nantes, 4433 Nantes Cedex 1, France
| | - Edouard Metzger
- UMR CNRS 6112 LPG-BIAF, Bio-Indicateurs Actuels et Fossiles, Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers CEDEX 1, France
| | - Emmanuelle Geslin
- UMR CNRS 6112 LPG-BIAF, Bio-Indicateurs Actuels et Fossiles, Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers CEDEX 1, France
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