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Yahyaoui K, Traikia M, Rihouey C, Picton L, Gardarin C, Ksouri WM, Laroche C. Chemical characterization of polysaccharides from Gracilaria gracilis from Bizerte (Tunisia). Int J Biol Macromol 2024; 266:131127. [PMID: 38527684 DOI: 10.1016/j.ijbiomac.2024.131127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 03/08/2024] [Accepted: 03/22/2024] [Indexed: 03/27/2024]
Abstract
Polysaccharides were extracted from Gracilaria gracilis collected from Manzel Jemil Lake in Bizerte Tunisia, with two different solvents (water and NaOH 0.3 M). Different assays were performed on samples (total sugars, neutral sugars, uronic acids, anhydrogalactose, proteins, sulphates, pyruvates), followed by high performance anion-exchange chromatography (HPAEC) to observe the monosaccharide composition, high pressure size exclusion chromatography with multi-angle laser light scattering (HPSEC-MALS) to obtain the molecular mass, Fourier transform infrared spectroscopy (FTIR), and 1D and 2D nuclear magnetic resonance (NMR) to access to structural data. Results have shown that the polysaccharide extracted from Gracilaria gracilis collected from Manzel Jemil Lake in Bizerte Tunisia, is of agar type but with high molecular mass and some original structural features. Hence, the sample was found to contain 9 % of pyruvate groups and is partly sulphated at the C4 of β-d-galactose and methylated on C2 of anhydro-α-l-galactose. The polymer from G. gracilis from Bizerte thus presents a never described structure that could be interesting for further rheological or biological activities applications.
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Affiliation(s)
- K Yahyaoui
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, F-63000 Clermont-Ferrand, France; Laboratory of Aromatic and Medicinal Plants, Center of Biotechnology, Technopark of Borj-Cedria, Hammam-Lif, Tunisia
| | - M Traikia
- Université Clermont Auvergne, CNRS, ICCF, F-63000 Clermont-Ferrand, France
| | - C Rihouey
- Université de Rouen, Laboratoire Polymères Biopolymères Surfaces, F-76821 Mont Saint Aignan, France
| | - L Picton
- Université de Rouen, Laboratoire Polymères Biopolymères Surfaces, F-76821 Mont Saint Aignan, France
| | - C Gardarin
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, F-63000 Clermont-Ferrand, France
| | - W Megdiche Ksouri
- Laboratory of Aromatic and Medicinal Plants, Center of Biotechnology, Technopark of Borj-Cedria, Hammam-Lif, Tunisia
| | - C Laroche
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, F-63000 Clermont-Ferrand, France.
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2
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Kolzenburg R, Moreira H, Storey C, Ragazzola F. Structural integrity and skeletal trace elements in intertidal coralline algae across the Northeast Atlantic reveal a distinct separation of the leading and the trailing edge populations. MARINE ENVIRONMENTAL RESEARCH 2023; 190:106086. [PMID: 37481877 DOI: 10.1016/j.marenvres.2023.106086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 06/28/2023] [Accepted: 07/05/2023] [Indexed: 07/25/2023]
Abstract
Intertidal macroalgae, such as coralline algae, represent an essential structural element and substrate in rocky coastal zones. They have a high degree of flexibility allowing their survival in environments with severe mechanical stress during tidal cycles. This study characterised the genicula and intergenicula of the calcifying red algae Corallina officinalis across its geographic distribution in the Northeast Atlantic. Poleward populations have constructed more sturdy cell walls compared to equatorward populations, potentially due to greater local adaptations to higher frequency and intensity of environmental factors like storms and wave action. Southern populations showed a lack of local adaptation culminating in survival rather than thriving within their current environment, hence, they are located at the margin of this species' favourable conditions. Results clarify significant differences between latitudes and indicate a north-to-south gradient in this species' skeletal elemental composition. Northern populations were dominated by cadmium, whereas chromium was the major trace element found in southern populations. In the future, these characteristics could lead to a permanent decline and a decrease in the ecosystem functions of C. officinalis in the southern locations in the Northeast Atlantic, which may be accelerated by predicted future climatic changes.
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Affiliation(s)
- Regina Kolzenburg
- ENEA Marine Environment Research Centre, Via Forte Santa Teresa, 19032, Pozzuolo di Lerici, SP, Italy; Institute of Marine Sciences, University of Portsmouth, Portsmouth, UK.
| | - Hugo Moreira
- Géosciences Montpellier CNRS, Université de Montpellier, 34090, Montpellier, France; School of the Environment, Geography and Geosciences, University of Portsmouth, Portsmouth, UK
| | - Craig Storey
- School of the Environment, Geography and Geosciences, University of Portsmouth, Portsmouth, UK
| | - Federica Ragazzola
- Genova Marine Centre, Stazione Zoologica Anton Dohrn, Piazza del Principe, 4, 16126 Genova GE, Italy
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3
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Melbourne LA, Brodie J, Rayfield EJ, Titelboim D, Lord OT, Schmidt DN. Environmental impacts on the structural integrity of British rhodoliths. Sci Rep 2023; 13:13473. [PMID: 37596363 PMCID: PMC10439216 DOI: 10.1038/s41598-023-40292-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 08/08/2023] [Indexed: 08/20/2023] Open
Abstract
Coralline algae form complex habitats which are biodiversity hotspots. Experimental studies suggest that climate change will decrease coralline algal structural integrity. These experiments, however, lack information on local morphological variability and how much structural change would be needed to threaten habitat formation. Here, using finite element modelling, we assess variability in cellular structure and chemical composition of the carbonate skeleton of four coralline algal species from Britain in contemporary and historical specimens collected over the last 130 years. Cellular and mineral properties are highly variable within species, between sites and through time, with structurally weaker cells in the southern species and contemporary material compared to northern taxa and historical material. Yet, temporal differences in strength were smaller than spatial differences. Our work supports long term experiments which show the adaptation potential of this group. Our results suggest that future anthropogenic climate change may lead to loss of habitat complexity in the south and expansion of structurally weaker southern species into northern sites.
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Affiliation(s)
- Leanne A Melbourne
- School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, UK.
- Earth and Planetary Sciences, American Museum of Natural History, New York, NY, 10024, USA.
| | - Juliet Brodie
- Department of Life Sciences, Natural History Museum, London, SW7 5BD, UK
| | - Emily J Rayfield
- School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, UK
| | - Danna Titelboim
- School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, UK
- Department of Earth Sciences, University of Oxford, Oxford, OX1 3AN, UK
| | - Oliver T Lord
- School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, UK
| | - Daniela N Schmidt
- School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, UK
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4
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Qui-Minet ZN, Davoult D, Grall J, Delaunay C, Six C, Cariou T, Martin S. Physiology of maerl algae: Comparison of inter- and intraspecies variations. JOURNAL OF PHYCOLOGY 2021; 57:831-848. [PMID: 33316844 DOI: 10.1111/jpy.13119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/09/2020] [Accepted: 11/08/2020] [Indexed: 06/12/2023]
Abstract
Free-living red coralline algae play an important role in the carbon and carbonate cycles of coastal environments. In this study, we examined the physiology of free-living coralline algae-forming maerl beds in the Bay of Brest (Brittany, France), where Lithothamnion corallioides is the dominant maerl (i.e., rhodolith) species. Phymatolithon calcareum and Lithophyllum incrustans are also present (in lower abundances) at a specific site in the bay. We aimed to assess how maerl physiology is affected by seasonality and/or local environmental variations at the inter- and intraspecific levels. Physiological measurements (respiration, photosynthetic, and calcification rates) were performed using incubation chambers in winter and summer to compare (1) the dominant maerl species at three sites and (2) three coexisting maerl species at one site. Comparison of the three coexisting maerl species suggests that L. corallioides is the best adapted to the current environmental conditions in the Bay of Brest, because this species is the most robust to dissolution in the dark in winter and has the highest calcification efficiency in the light. Comparisons of L. corallioides metabolic rates between stations showed that morphological variations within this species are the main factor affecting its photosynthetic and calcification rates. Environmental factors such as freshwater inputs also affect its calcification rates in the dark. In addition to interspecies variation in maerl physiology, there were intraspecific variations associated with direct (water physico-chemistry) or indirect (morphology) local environmental conditions. This study demonstrates the plasticity of maerl physiology in response to environmental changes, which is fundamental for maerl persistence.
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Affiliation(s)
- Zujaila Nohemy Qui-Minet
- CNRS, UMR 7144 Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff, Sorbonne Université, Place Georges Teissier, 29688, Roscoff Cedex, France
| | - Dominique Davoult
- CNRS, UMR 7144 Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff, Sorbonne Université, Place Georges Teissier, 29688, Roscoff Cedex, France
| | - Jacques Grall
- IUEM, Université de Bretagne Occidentale, Place Nicolas Copernic, 29280, Plouzané, France
| | - Coralie Delaunay
- CNRS, UMR 7144 Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff, Sorbonne Université, Place Georges Teissier, 29688, Roscoff Cedex, France
| | - Christophe Six
- CNRS, UMR 7144 Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff, Sorbonne Université, Place Georges Teissier, 29688, Roscoff Cedex, France
| | - Thierry Cariou
- CNRS, Fédération de Recherche FR2424, Station Biologique de Roscoff, Sorbonne Université, Place Georges Teissier, 29680, Roscoff, France
| | - Sophie Martin
- CNRS, UMR 7144 Adaptation et Diversité en Milieu Marin, Station Biologique de Roscoff, Sorbonne Université, Place Georges Teissier, 29688, Roscoff Cedex, France
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5
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Bhagooli R, Mattan-Moorgawa S, Kaullysing D, Louis YD, Gopeechund A, Ramah S, Soondur M, Pilly SS, Beesoo R, Wijayanti DP, Bachok ZB, Monrás VC, Casareto BE, Suzuki Y, Baker AC. Chlorophyll fluorescence - A tool to assess photosynthetic performance and stress photophysiology in symbiotic marine invertebrates and seaplants. MARINE POLLUTION BULLETIN 2021; 165:112059. [PMID: 33677415 DOI: 10.1016/j.marpolbul.2021.112059] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 12/30/2020] [Accepted: 01/01/2021] [Indexed: 06/12/2023]
Abstract
Chlorophyll a fluorescence is increasingly being used as a rapid, non-invasive, sensitive and convenient indicator of photosynthetic performance in marine autotrophs. This review presents the methodology, applications and limitations of chlorophyll fluorescence in marine studies. The various chlorophyll fluorescence tools such as Pulse-Amplitude-Modulated (PAM) and Fast Repetition Rate (FRR) fluorometry used in marine scientific studies are discussed. Various commonly employed chlorophyll fluorescence parameters are elaborated. The application of chlorophyll fluorescence in measuring natural variations, stress, stress tolerance and acclimation/adaptation to changing environment in primary producers such as microalgae, macroalgae, seagrasses and mangroves, and marine symbiotic invertebrates, namely symbiotic sponges, hard corals and sea anemones, kleptoplastic sea slugs and giant clams is critically assessed. Stressors include environmental, biological, physical and chemical ones. The strengths, limitations and future perspectives of the use of chlorophyll fluorescence technique as an assessment tool in symbiotic marine organisms and seaplants are discussed.
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Affiliation(s)
- Ranjeet Bhagooli
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius; The Biodiversity and Environment Institute, Réduit, Mauritius; The Society of Biology (Mauritius), Réduit, Mauritius; Institute of Oceanography and Environment (INOS), Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia.
| | - Sushma Mattan-Moorgawa
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius; The Biodiversity and Environment Institute, Réduit, Mauritius
| | - Deepeeka Kaullysing
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius; The Biodiversity and Environment Institute, Réduit, Mauritius
| | - Yohan Didier Louis
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius
| | - Arvind Gopeechund
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius; The Biodiversity and Environment Institute, Réduit, Mauritius
| | - Sundy Ramah
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius
| | - Mouneshwar Soondur
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius; The Biodiversity and Environment Institute, Réduit, Mauritius
| | - Sivajyodee Sannassy Pilly
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius
| | - Rima Beesoo
- Department of Biosciences & Ocean Studies, Faculty of Science & Pole of Research Excellence, Sustainable Marine Biodiversity Research Group, University of Mauritius, Réduit 80837, Mauritius
| | | | - Zainudin Bin Bachok
- Institute of Oceanography and Environment (INOS), Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
| | - Víctor Cubillos Monrás
- Instituto de Ciencias Marinas y Limnológicas, Laboratorio Costero de Recursos Acuáticos de Calfuco, Universidad Austral de Chile, Valdivia, Chile
| | | | - Yoshimi Suzuki
- Shizuoka University, 836 Oya, Suruga, Shizuoka, Shizuoka, Japan
| | - Andrew Charles Baker
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA
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6
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Wolfe K, Nguyen HD, Davey M, Byrne M. Characterizing biogeochemical fluctuations in a world of extremes: A synthesis for temperate intertidal habitats in the face of global change. GLOBAL CHANGE BIOLOGY 2020; 26:3858-3879. [PMID: 32239581 DOI: 10.1111/gcb.15103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 03/17/2020] [Indexed: 05/24/2023]
Abstract
Coastal and intertidal habitats are at the forefront of anthropogenic influence and environmental change. The species occupying these habitats are adapted to a world of extremes, which may render them robust to the changing climate or more vulnerable if they are at their physiological limits. We characterized the diurnal, seasonal and interannual patterns of flux in biogeochemistry across an intertidal gradient on a temperate sandstone platform in eastern Australia over 6 years (2009-2015) and present a synthesis of our current understanding of this habitat in context with global change. We used rock pools as natural mesocosms to determine biogeochemistry dynamics and patterns of eco-stress experienced by resident biota. In situ measurements and discrete water samples were collected night and day during neap low tide events to capture diurnal biogeochemistry cycles. Calculation of pHT using total alkalinity (TA) and dissolved inorganic carbon (DIC) revealed that the mid-intertidal habitat exhibited the greatest flux over the years (pHT 7.52-8.87), and over a single tidal cycle (1.11 pHT units), while the low-intertidal (pHT 7.82-8.30) and subtidal (pHT 7.87-8.30) were less variable. Temperature flux was also greatest in the mid-intertidal (8.0-34.5°C) and over a single tidal event (14°C range), as typical of temperate rocky shores. Mean TA and DIC increased at night and decreased during the day, with the most extreme conditions measured in the mid-intertidal owing to prolonged emersion periods. Temporal sampling revealed that net ecosystem calcification and production were highest during the day and lowest at night, particularly in the mid-intertidal. Characterization of biogeochemical fluctuations in a world of extremes demonstrates the variable conditions that intertidal biota routinely experience and highlight potential microhabitat-specific vulnerabilities and climate change refugia.
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Affiliation(s)
- Kennedy Wolfe
- Marine Spatial Ecology Lab, School of Biological Sciences and ARC Centre of Excellence for Coral Reef Studies, University of Queensland, St Lucia, Qld, Australia
- School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
| | - Hong D Nguyen
- School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
| | - Madeline Davey
- Centre for Biodiversity and Conservation Science, School of Biological Sciences, University of Queensland, St Lucia, Qld, Australia
| | - Maria Byrne
- School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
- School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia
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7
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Saleh A, Vajed Samiei J, Amini-Yekta F, Seyed Hashtroudi M, Chen CTA, Fumani NS. The carbonate system on the coral patches and rocky intertidal habitats of the northern Persian Gulf: Implications for ocean acidification studies. MARINE POLLUTION BULLETIN 2020; 151:110834. [PMID: 32056626 DOI: 10.1016/j.marpolbul.2019.110834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 12/07/2019] [Accepted: 12/15/2019] [Indexed: 06/10/2023]
Abstract
This research characterizes the temporal and spatial variability of the seawater carbonate chemistry on the near-shore waters of the northern Persian Gulf and Makran Sea. In general, normalized total alkalinity (nAT) showed a westward decrease along the coasts of Makran Sea and the Persian Gulf. Intertidal seawater was always supersaturated in terms of calcium carbonate minerals during the daytime. Rocky shore waters in the Persian Gulf were sinks for CO2 in the winter during the daytime. The nAT decreased from Larak to Khargu Island by 81 μmol/kg. As expected, the two hypothetical drivers of bio-calcification, i.e., Ω and the [HCO3-]/[H+] ratio, were significantly related at a narrow range of ambient temperature. However, as data were pooled over seasons and study sites, in contrast to ΩAr, the [HCO3-]/[H+] ratio showed a slight dependence on temperature, suggesting that the ratio should be investigated as a more reliable factor in future biocalcification researches.
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Affiliation(s)
- Abolfazl Saleh
- Iranian National Institute for Oceanography and Atmospheric Science, No. 3, Etemadzadeh St., Fatemi Ave., Tehran 1411813389, Iran.
| | - Jahangir Vajed Samiei
- Department of Marine Ecology, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | - Fatemeh Amini-Yekta
- Iranian National Institute for Oceanography and Atmospheric Science, No. 3, Etemadzadeh St., Fatemi Ave., Tehran 1411813389, Iran
| | - Mehri Seyed Hashtroudi
- Iranian National Institute for Oceanography and Atmospheric Science, No. 3, Etemadzadeh St., Fatemi Ave., Tehran 1411813389, Iran
| | - Chen-Tung Arthur Chen
- Department of Oceanography, National Sun Yat-sen University, Kaohsiung 80424, Taiwan, ROC.
| | - Neda Sheijooni Fumani
- Iranian National Institute for Oceanography and Atmospheric Science, No. 3, Etemadzadeh St., Fatemi Ave., Tehran 1411813389, Iran
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8
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McCoy SJ, Santillán-Sarmiento A, Brown MT, Widdicombe S, Wheeler GL. Photosynthetic Responses of Turf-forming Red Macroalgae to High CO 2 Conditions. JOURNAL OF PHYCOLOGY 2020; 56:85-96. [PMID: 31553063 DOI: 10.1111/jpy.12922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 08/18/2019] [Indexed: 06/10/2023]
Abstract
Seaweeds are important components of near-shore ecosystems as primary producers, foundation species, and biogeochemical engineers. Seaweed communities are likely to alter under predicted climate change scenarios. We tested the physiological responses of three perennial, turf-building, intertidal rhodophytes, Mastocarpus stellatus, Osmundea pinnatifida, and the calcified Ellisolandia elongata, to elevated pCO2 over 6 weeks. Responses varied between these three species. E. elongata was strongly affected by high pCO2 , whereas non-calcified species were not. Elevated pCO2 did not induce consistent responses of photosynthesis and respiration across these three species. While baseline photophysiology differed significantly between species, we found few clear effects of elevated pCO2 on this aspect of macroalgal physiology. We found effects of within-species variation in elevated pCO2 response in M. stellatus, but not in the other species. Overall, our data confirm the sensitivity of calcified macroalgae to elevated pCO2 , but we found no evidence suggesting that elevated pCO2 conditions will have a strong positive or negative impact on photosynthetic parameters in non-calcified macroalgae.
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Affiliation(s)
- Sophie J McCoy
- Department of Biological Science, Florida State University, 319 Stadium Drive, Tallahassee, Florida, 32306-4295, USA
- Plymouth Marine Laboratory, Prospect Place, Plymouth, Devon, PL1 3DH, UK
| | - Alex Santillán-Sarmiento
- School of Biological and Marine Sciences, University of Plymouth, 4th Floor Davy Building, Drake Circus, Plymouth, PL4 8AA, UK
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale 1, 80121, Napoli, Italy
- Faculty of Engineering, National University of Chimborazo, Av. Antonio José de Sucre Km 1 1/2 via Guano, EC 060108, Riobamba, Ecuador
| | - Murray T Brown
- School of Biological and Marine Sciences, University of Plymouth, 4th Floor Davy Building, Drake Circus, Plymouth, PL4 8AA, UK
| | - Stephen Widdicombe
- Plymouth Marine Laboratory, Prospect Place, Plymouth, Devon, PL1 3DH, UK
| | - Glen L Wheeler
- Marine Biological Association of the UK, Citadel Hill, Plymouth, PL1 2PB, UK
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9
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Qui-Minet ZN, Coudret J, Davoult D, Grall J, Mendez‐Sandin M, Cariou T, Martin S. Combined effects of global climate change and nutrient enrichment on the physiology of three temperate maerl species. Ecol Evol 2019; 9:13787-13807. [PMID: 31938482 PMCID: PMC6953553 DOI: 10.1002/ece3.5802] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/02/2019] [Accepted: 10/03/2019] [Indexed: 01/20/2023] Open
Abstract
Made up of calcareous coralline algae, maerl beds play a major role as ecosystem engineers in coastal areas throughout the world. They undergo strong anthropogenic pressures, which may threaten their survival. The aim of this study was to gain insight into the future of maerl beds in the context of global and local changes. We examined the effects of rising temperatures (+3°C) and ocean acidification (-0.3 pH units) according to temperature and pH projections (i.e., the RCP 8.5 scenario), and nutrient (N and P) availability on three temperate maerl species (Lithothamnion corallioides, Phymatolithon calcareum, and Lithophyllum incrustans) in the laboratory in winter and summer conditions. Physiological rates of primary production, respiration, and calcification were measured on all three species in each treatment and season. The physiological response of maerl to global climate change was species-specific and influenced by seawater nutrient concentrations. Future temperature-pH scenario enhanced maximal gross primary production rates in P. calcareum in winter and in L. corallioides in both seasons. Nevertheless, both species suffered an impairment of light harvesting and photoprotective mechanisms in winter. Calcification rates at ambient light intensity were negatively affected by the future temperature-pH scenario in winter, with net dissolution observed in the dark in L. corallioides and P. calcareum under low nutrient concentrations. Nutrient enrichment avoided dissolution under future scenarios in winter and had a positive effect on L. incrustans calcification rate in the dark in summer. In winter conditions, maximal calcification rates were enhanced by the future temperature-pH scenario on the three species, but P. calcareum suffered inhibition at high irradiances. In summer conditions, the maximal calcification rate dropped in L. corallioides under the future global climate change scenario, with a potential negative impact on CaCO3 budget for maerl beds in the Bay of Brest where this species is dominant. Our results highlight how local changes in nutrient availability or irradiance levels impact the response of maerl species to global climate change and thus point out how it is important to consider other abiotic parameters in order to develop management policies capable to increase the resilience of maerl beds under the future global climate change scenario.
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Affiliation(s)
- Zujaila Nohemy Qui-Minet
- Sorbonne UniversitésCNRSUMR 7144 Adaptation et Diversité en Milieu MarinStation Biologique de RoscoffRoscoffFrance
| | - Jérôme Coudret
- Sorbonne UniversitésCNRSUMR 7144 Adaptation et Diversité en Milieu MarinStation Biologique de RoscoffRoscoffFrance
| | - Dominique Davoult
- Sorbonne UniversitésCNRSUMR 7144 Adaptation et Diversité en Milieu MarinStation Biologique de RoscoffRoscoffFrance
| | - Jacques Grall
- Université de Bretagne OccidentaleIUEMPlouzanéFrance
| | - Miguel Mendez‐Sandin
- Sorbonne UniversitésCNRSUMR 7144 Adaptation et Diversité en Milieu MarinStation Biologique de RoscoffRoscoffFrance
| | - Thierry Cariou
- Sorbonne UniversitésCNRS, FR2424Station Biologique de RoscoffRoscoffFrance
| | - Sophie Martin
- Sorbonne UniversitésCNRSUMR 7144 Adaptation et Diversité en Milieu MarinStation Biologique de RoscoffRoscoffFrance
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10
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Kolzenburg R, Nicastro KR, McCoy SJ, Ford AT, Zardi GI, Ragazzola F. Understanding the margin squeeze: Differentiation in fitness-related traits between central and trailing edge populations of Corallina officinalis. Ecol Evol 2019; 9:5787-5801. [PMID: 31160999 PMCID: PMC6540663 DOI: 10.1002/ece3.5162] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/18/2019] [Accepted: 03/19/2019] [Indexed: 11/25/2022] Open
Abstract
ABSTRACT Assessing population responses to climate-related environmental change is key to understanding the adaptive potential of the species as a whole. Coralline algae are critical components of marine shallow water ecosystems where they function as important ecosystem engineers. Populations of the calcifying algae Corallina officinalis from the center (southern UK) and periphery (northern Spain) of the North Atlantic species natural distribution were selected to test for functional differentiation in thermal stress response. Physiological measurements of calcification, photosynthesis, respiration, growth rates, oxygen, and calcification evolution curves were performed using closed cell respirometry methods. Species identity was genetically confirmed via DNA barcoding. Through a common garden approach, we identified distinct vulnerability to thermal stress of central and peripheral populations. Southern populations showed a decrease in photosynthetic rate under environmental conditions of central locations, and central populations showed a decline in calcification rates under southern conditions. This shows that the two processes of calcification and photosynthesis are not as tightly coupled as previously assumed. How the species as whole will react to future climatic changes will be determined by the interplay of local environmental conditions and these distinct population adaptive traits. OPEN RESEARCH BADGES This article has earned an Open Materials Badge for making publicly available the components of the research methodology needed to reproduce the reported procedure and analysis. All materials are available at https://doi.pangaea.de/10.1594/PANGAEA.899568.
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Affiliation(s)
| | - Katy R. Nicastro
- Centre of Marine Sciences (CCMAR)University of AlgarveFaroPortugal
| | - Sophie J. McCoy
- Department of Biological SciencesFlorida State UniversityTallahasseeFlorida
| | - Alex T. Ford
- Institute of Marine SciencesUniversity of PortsmouthPortsmouthUK
| | - Gerardo I. Zardi
- Department of Zoology and EntomologyRhodes UniversityGrahamstownSouth Africa
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11
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Legrand E, Riera P, Bohner O, Coudret J, Schlicklin F, Derrien M, Martin S. Impact of ocean acidification and warming on the productivity of a rock pool community. MARINE ENVIRONMENTAL RESEARCH 2018; 136:78-88. [PMID: 29472033 DOI: 10.1016/j.marenvres.2018.02.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 02/05/2018] [Accepted: 02/11/2018] [Indexed: 06/08/2023]
Abstract
This study examined experimentally the combined effect of ocean acidification and warming on the productivity of rock pool multi-specific assemblages, composed of coralline algae, fleshy algae, and grazers. Natural rock pool communities experience high environmental fluctuations. This may confer physiological advantage to rock pool communities when facing predicted acidification and warming. The effect of ocean acidification and warming have been assessed at both individual and assemblage level to examine the importance of species interactions in the response of assemblages. We hypothesized that rock pool assemblages have physiological advantage when facing predicted ocean acidification and warming. Species exhibited species-specific responses to increased temperature and pCO2. Increased temperature and pCO2 have no effect on assemblage photosynthesis, which was mostly influenced by fleshy algal primary production. The response of coralline algae to ocean acidification and warming depended on the season, which evidenced the importance of physiological adaptations to their environment in their response to climate change. We suggest that rock pool assemblages are relatively robust to changes in temperature and pCO2, in terms of primary production.
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Affiliation(s)
- Erwann Legrand
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France.
| | - Pascal Riera
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Olivier Bohner
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Jérôme Coudret
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Ferdinand Schlicklin
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Marie Derrien
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
| | - Sophie Martin
- Sorbonne Université, CNRS, UMR7144, EFEB, Station Biologique de Roscoff, 29680 Roscoff, France
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12
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Nitrogen Starvation Impacts the Photosynthetic Performance of Porphyridium cruentum as Revealed by Chlorophyll a Fluorescence. Sci Rep 2017; 7:8542. [PMID: 28819147 PMCID: PMC5561210 DOI: 10.1038/s41598-017-08428-6] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/12/2017] [Indexed: 11/08/2022] Open
Abstract
Nitrogen is one of the most important nutrients needed for plants and algae to survive, and the photosynthetic ability of algae is related to nitrogen abundance. Red algae are unique photosynthetic eukaryotic organisms in the evolution of algae, as they contain phycobilisomes (PBSs) on their thylakoid membranes. In this report, the in vivo chlorophyll (Chl) a fluorescence kinetics of nitrogen-starved Porphyridium cruentum were analyzed to determine the effects of nitrogen deficiency on photosynthetic performance using a multi-color pulse amplitude modulation (PAM) chlorophyll fluorometer. Due to nitrogen starvation, the photochemical efficiency of PSII and the activity of PSII reaction centers (RCs) decreased, and photoinhibition of PSII occurred. The water-splitting system on the donor side of PSII was seriously impacted by nitrogen deficiency, leading to the inactivation of the oxygen-evolving complex (OEC) and decreased light energy conversion efficiency. In nitrogen-starved cells, a higher proportion of energy was used for photochemical reactions, and thermal dissipation was reduced, as shown by qP and qN. The ability of nitrogen-starved cells to tolerate and resist high photon flux densities was weakened. Our results showed that the photosynthetic performance of P. cruentum was severely impacted by nitrogen deficiency.
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13
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Brodie J, Williamson C, Barker GL, Walker RH, Briscoe A, Yallop M. Characterising the microbiome of Corallina officinalis, a dominant calcified intertidal red alga. FEMS Microbiol Ecol 2016; 92:fiw110. [PMID: 27222222 DOI: 10.1093/femsec/fiw110] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2016] [Indexed: 01/17/2023] Open
Abstract
The living prokaryotic microbiome of the calcified geniculate (articulated) red alga, Corallina officinalis from the intertidal seashore is characterised for the first time based on the V6 hypervariable region of 16S rRNA. Results revealed an extraordinary diversity of bacteria associated with the microbiome. Thirty-five prokaryotic phyla were recovered, of which Proteobacteria, Cyanobacteria, Bacteroidetes, Actinobacteria, Planctomycetes, Acidobacteria, Verrucomicrobia, Firmicutes and Chloroflexi made up the core microbiome. Unclassified sequences made up 25% of sequences, suggesting insufficient sampling of the world's oceans/macroalgae. The greatest diversity in the microbiome was on the upper shore, followed by the lower shore then the middle shore, although the microbiome community composition did not vary between shore levels. The C. officinalis core microbiome was broadly similar in composition to those reported in the literature for crustose coralline algae (CCAs) and free-living rhodoliths. Differences in relative abundance of the phyla between the different types of calcified macroalgal species may relate to the intertidal versus subtidal habit of the taxa and functionality of the microbiome components. The results indicate that much work is needed to identify prokaryotic taxa, and to determine the nature of the relationship of the bacteria with the calcified host spatially, temporally and functionally.
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Affiliation(s)
- Juliet Brodie
- Department of Life Sciences, Genomics and Microbial Biodiversity, Natural History Museum, Cromwell Road, London SW7, 5BD, UK
| | - Christopher Williamson
- Department of Life Sciences, Genomics and Microbial Biodiversity, Natural History Museum, Cromwell Road, London SW7, 5BD, UK
| | - Gary L Barker
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Rachel H Walker
- Department of Life Sciences, Genomics and Microbial Biodiversity, Natural History Museum, Cromwell Road, London SW7, 5BD, UK
| | - Andrew Briscoe
- Department of Life Sciences, Genomics and Microbial Biodiversity, Natural History Museum, Cromwell Road, London SW7, 5BD, UK
| | - Marian Yallop
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
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14
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Perkins RG, Williamson CJ, Brodie J, Barillé L, Launeau P, Lavaud J, Yallop ML, Jesus B. Microspatial variability in community structure and photophysiology of calcified macroalgal microbiomes revealed by coupling of hyperspectral and high-resolution fluorescence imaging. Sci Rep 2016; 6:22343. [PMID: 26923719 PMCID: PMC4770322 DOI: 10.1038/srep22343] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 02/09/2016] [Indexed: 11/09/2022] Open
Abstract
Calcifying coralline macroalgae provide biogenic habitats colonised by epiphytic microalgae that contribute significantly to community productivity. Georeferenced hyperspectral and high-resolution fluorescence imaging were coupled to microspatially mapped community composition and relative biomass of macroalgal host and epiphyte microalgal groups, and their weighted contributions to productivity within host fronds of Corallina officinalis on upper and lower zones of a rocky shore were determined. Lower shore epiphytes were dominated by filamentous diatoms (Bacillariophyta), confined to the apex of the frond structure, which were low light acclimated but retained a high capacity for photoprotective down regulation and contributed up to 51% of total community productivity. Upper shore epiphytes were dominated by green algae (Chlorophyta) and single-celled diatoms (principally Cocconeis spp.), which were high light acclimated but present at far lower relative biomass and contributed negligibly to productivity. The host, C. officinalis was the main primary producer. Variation in light environment resulting from differences in shore height and shading within the host macroalga, likely play a large role in determining patterns in epiphyte community structure, biomass and productivity observed. Additionally, microspatial gradients in photophysiological parameters along the host macroalga likely resulted from age-dependent variation in pigments as well as the gradient in light environment.
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Affiliation(s)
- R G Perkins
- School of Earth and Ocean Sciences, Cardiff University, Cardiff, Glamorgan, CF10 3AT, UK
| | - C J Williamson
- School of Earth and Ocean Sciences, Cardiff University, Cardiff, Glamorgan, CF10 3AT, UK.,Natural History Museum, Department of Life Sciences, Cromwell Road, London SW7 5BD, UK
| | - J Brodie
- Natural History Museum, Department of Life Sciences, Cromwell Road, London SW7 5BD, UK
| | - L Barillé
- Université de Nantes, Labotoire de Mer Molécules Santé EA 2160, Faculté des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France
| | - P Launeau
- LUNAM Université, Université de Nantes, Laboratoire de Planétologie et Géodynamique UMR 6112, Faculté des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France
| | - J Lavaud
- UMR7266 LIENSs 'Littoral, Environnement et Sociétés', CNRS/Université de La Rochelle, Institut du Littoral et de l'Environnement, La Rochelle, France
| | - M L Yallop
- School of Biological Sciences, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK
| | - B Jesus
- Université de Nantes, Labotoire de Mer Molécules Santé EA 2160, Faculté des Sciences et des Techniques, B.P. 92208, 44322 Nantes cedex 3, France.,University of Lisboa, Faculty of Sciences, BioISI - Biosystems &Integrative Sciences Institute, Campo Grande, 1749-016 Lisboa, Portugal
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