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Aggarwal R, Jain N, Dubey GP. Design, synthesis and characterization of tetra substituted 2,3-dihydrothiazole derivatives as DNA and BSA targeting agents: advantages of the visible-light-induced multicomponent approach. RSC Adv 2024; 14:23152-23176. [PMID: 39040709 PMCID: PMC11262567 DOI: 10.1039/d4ra02331e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 06/22/2024] [Indexed: 07/24/2024] Open
Abstract
This report describes the visible-light-induced one-pot multicomponent regioselective synthesis of a series of 5-aroyl-3-((arylidene)amino)-2-((arylidene)hydrazono)-4-methyl-2,3-dihydrothiazoles as DNA and BSA targeting agents. The multicomponent condensation of thiocarbohydrazide and aldehydes with α-bromo-1,3-diketones, generated in situ by the bromination of unsymmetrical 1,3-diketones with NBS using white LED light as an environmental friendly source in the presence of EtOAc solvent furnished the titled 2,3-dihydrothiazole derivatives in excellent yields. The exact regioisomeric structure was identified unambiguously by employing multinuclear 2D-NMR spectroscopy [1H-13C] HMBC; [1H-13C] HMQC and [1H-15N] HMBC. Furthermore, the binding characteristics of the synthesized 2,3-dihydrothiazole derivatives were assessed with double-stranded calf-thymus DNA duplex (ct-DNA) and bovine serum albumin (BSA). Initial screening of all the synthesized 2,3-dihydrothiazole derivatives using various in silico techniques including molecular reactivity analysis, Lipinski rule and molecular docking, concluded 5-(4'-chlorobenzoyl)-3-((4''-methoxybenzylidene)amino)-2-(4'''-methoxybenzylidene)hydrazono)-4-methyl-2,3-dihydrothiazole derivative 6a as the most suitable compound for studying binding interaction with DNA and BSA. Additionally, to illustrate the ex vivo binding mode of 6a with DNA and BSA, several spectroscopic techniques viz. UV-visible, circular dichroism (CD), steady-state fluorescence and competitive displacement assays were carried out.
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Affiliation(s)
- Ranjana Aggarwal
- Department of Chemistry, Kurukshetra University Kurukshetra 136119 Haryana India
- CSIR-National Institute of Science Communication and Policy Research New Delhi 110012 India +91-9896740740
| | - Naman Jain
- Department of Chemistry, Kurukshetra University Kurukshetra 136119 Haryana India
| | - Gyan Prakash Dubey
- Department of Chemistry, Kurukshetra University Kurukshetra 136119 Haryana India
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2
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Bayley DTI, Brewin PE, James R, McCarthy AH, Brickle P. Identifying marine invasion threats and management priorities through introduction pathway analysis in a remote sub-Antarctic ecosystem. Ecol Evol 2024; 14:e11299. [PMID: 38654709 PMCID: PMC11036081 DOI: 10.1002/ece3.11299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 04/02/2024] [Accepted: 04/05/2024] [Indexed: 04/26/2024] Open
Abstract
The threat from novel marine species introductions is a global issue. When non-native marine species are introduced to novel environments and become invasive, they can affect biodiversity, industry, ecosystem function, and both human and wildlife health. Isolated areas with sensitive or highly specialised endemic species can be particularly impacted. The global increase in the scope of tourism and other human activities, together with a rapidly changing climate, now put these remote ecosystems under threat. In this context, we analyse invasion pathways into South Georgia and the South Sandwich Islands (SGSSI) for marine non-native species via vessel biofouling. The SGSSI archipelago has high biodiversity and endemism, and has historically been highly isolated from the South American mainland. The islands sit just below the Polar Front temperature boundary, affording some protection against introductions. However, the region is now warming and SGSSI increasingly acts as a gateway port for vessel traffic into the wider Antarctic, amplifying invasion likelihood. We use remote Automatic Identification System vessel-tracking data over a 2-year period to map vessel movement and behaviour around South Georgia, and across the 'Scotia Sea', 'Magellanic' and northern 'Continental High Antarctic' ecoregions. We find multiple vessel types from locations across the globe frequently now enter shallow inshore waters and stop for prolonged periods (weeks/months) at anchor. Vessels are active throughout the year and stop at multiple port hubs, frequently crossing international waters and ecoregions. Management recommendations to reduce marine invasion likelihood within SGSSI include initiating benthic and hull monitoring at the identified activity/dispersion hubs of King Edward Point, Bay of Isles, Gold Harbour, St Andrews Bay and Stromness Bay. More broadly, regional collaboration and coordination is necessary at neighbouring international ports. Here vessels need increased pre- and post-arrival biosecurity assessment following set protocols, and improved monitoring of hulls for biofouling to pre-emptively mitigate this threat.
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Affiliation(s)
- Daniel T. I. Bayley
- South Atlantic Environment Research InstituteStanleyFalkland Islands
- Centre for Biodiversity and Environment ResearchUniversity College LondonLondonUK
| | - Paul E. Brewin
- South Atlantic Environment Research InstituteStanleyFalkland Islands
- Shallow Marine Surveys GroupStanleyFalkland Islands
| | - Ross James
- Government of South Georgia & the South Sandwich IslandsStanleyFalkland Islands
| | - Arlie H. McCarthy
- Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB)OldenburgGermany
- Alfred‐Wegener‐InstitutHelmholtz‐Zentrum für Polar‐ Und MeeresforschungBremerhavenGermany
| | - Paul Brickle
- South Atlantic Environment Research InstituteStanleyFalkland Islands
- Shallow Marine Surveys GroupStanleyFalkland Islands
- School of Biological Sciences (Zoology)University of AberdeenAberdeenUK
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3
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Page HN, McCoy S, Spencer RGM, Burnham KA, Hewett C, Johnson M. Effects of ocean acidification on growth and photophysiology of two tropical reef macroalgae. PLoS One 2023; 18:e0286661. [PMID: 37976304 PMCID: PMC10655979 DOI: 10.1371/journal.pone.0286661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 05/21/2023] [Indexed: 11/19/2023] Open
Abstract
Macroalgae can modify coral reef community structure and ecosystem function through a variety of mechanisms, including mediation of biogeochemistry through photosynthesis and the associated production of dissolved organic carbon (DOC). Ocean acidification has the potential to fuel macroalgal growth and photosynthesis and alter DOC production, but responses across taxa and regions are widely varied and difficult to predict. Focusing on algal taxa from two different functional groups on Caribbean coral reefs, we exposed fleshy (Dictyota spp.) and calcifying (Halimeda tuna) macroalgae to ambient and low seawater pH for 25 days in an outdoor experimental system in the Florida Keys. We quantified algal growth, calcification, photophysiology, and DOC production across pH treatments. We observed no significant differences in the growth or photophysiology of either species between treatments, except for lower chlorophyll b concentrations in Dictyota spp. in response to low pH. We were unable to quantify changes in DOC production. The tolerance of Dictyota and Halimeda to near-future seawater carbonate chemistry and stability of photophysiology, suggests that acidification alone is unlikely to change biogeochemical processes associated with algal photosynthesis in these species. Additional research is needed to fully understand how taxa from these functional groups sourced from a wide range of environmental conditions regulate photosynthesis (via carbon uptake strategies) and how this impacts their DOC production. Understanding these species-specific responses to future acidification will allow us to more accurately model and predict the indirect impacts of macroalgae on coral health and reef ecosystem processes.
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Affiliation(s)
- Heather N. Page
- Elizabeth Moore International Center for Coral Reef Research and Restoration, Mote Marine Laboratory, Summerland Key, FL, United States of America
- Sea Education Association, Woods Hole, MA, United States of America
| | - Sophie McCoy
- University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | | | - Katherine A. Burnham
- Elizabeth Moore International Center for Coral Reef Research and Restoration, Mote Marine Laboratory, Summerland Key, FL, United States of America
| | - Clay Hewett
- Elizabeth Moore International Center for Coral Reef Research and Restoration, Mote Marine Laboratory, Summerland Key, FL, United States of America
- Jacksonville University, Jacksonville, Fl, United States of America
| | - Maggie Johnson
- Smithsonian Marine Station, Fort Pierce, FL, United States of America
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4
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Canham R, Rourke J, Ydenberg RC. The exploitation of biofilm by migrant western sandpipers ( Calidrismauri). Heliyon 2023; 9:e17268. [PMID: 37408920 PMCID: PMC10319247 DOI: 10.1016/j.heliyon.2023.e17268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 06/10/2023] [Accepted: 06/13/2023] [Indexed: 07/07/2023] Open
Abstract
Assessing the quality of migratory shorebird stopover sites requires good measures of food availability. We developed simple methods to measure biofilm grazing by migrant western sandpipers (Calidris mauri), a species for which biofilm is an important dietary component. We used a field-portable chlorofluorometer to measure the density of chlorophyll-a (Chl-a) in surficial biofilms on Roberts Bank, a large intertidal mudflat in British Columbia, Canada, during northward migration. Chl-a density begins at a low level during each diurnal emersion period, and increases steadily during emersion at 4.1 mg m-2 h-1 for a total of ∼24.6 mg m-2 over a typical 6 h emersion period and ∼41 mg m-2 over a 10 h emersion period. Western sandpipers grazed at 1.35-1.45 mg Chl-a m-2 min-1, thus biofilm production supports 17.6 min m-2 of grazing time during a 6 h low tide period and 29.3 min m-2 during a 10 h period. During peak northward migration, the average grazing intensity of western sandpipers over an intertidal emersion period was 3.3-6.4 min m-2, suggesting that biofilm accumulation was 2.7-8.8 fold greater than the amount consumed. We found Chl-a density was highest (∼65 mg per m2) within 40 m of the shoreline. Grazing intensity was lowest close to shore, where predation risk from falcon attacks is highest. Grazing intensity peaked at 240 m and then declined, lowering Chl-a density at greater distances to a uniform level of ∼54 mg m-2. These results indicate that interactions between biofilm production and sandpiper grazing underlie spatio-temporal patterns in biofilm abundance on Roberts Bank.
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Affiliation(s)
- Rachel Canham
- Department of Biological Sciences, Simon Fraser University, Burnaby BC V5A 1S6 Canada
- Canadian Wildlife Service, Environment and Climate Change Canada, Pacific Wildlife Research Centre, 5421 Robertson Road, Delta, British Columbia, V4K3N2, Canada
| | - James Rourke
- Ausenco 18th Floor, 4515 Central Boulevard, Burnaby, British Columbia, V5H 0C6, Canada
| | - Ronald C. Ydenberg
- Department of Biological Sciences, Simon Fraser University, Burnaby BC V5A 1S6 Canada
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Sacramento MMA, Borges J, Correia FJS, Calado R, Rodrigues JMM, Patrício SG, Mano JF. Green approaches for extraction, chemical modification and processing of marine polysaccharides for biomedical applications. Front Bioeng Biotechnol 2022; 10:1041102. [PMID: 36568299 PMCID: PMC9773402 DOI: 10.3389/fbioe.2022.1041102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 11/24/2022] [Indexed: 12/13/2022] Open
Abstract
Over the past few decades, natural-origin polysaccharides have received increasing attention across different fields of application, including biomedicine and biotechnology, because of their specific physicochemical and biological properties that have afforded the fabrication of a plethora of multifunctional devices for healthcare applications. More recently, marine raw materials from fisheries and aquaculture have emerged as a highly sustainable approach to convert marine biomass into added-value polysaccharides for human benefit. Nowadays, significant efforts have been made to combine such circular bio-based approach with cost-effective and environmentally-friendly technologies that enable the isolation of marine-origin polysaccharides up to the final construction of a biomedical device, thus developing an entirely sustainable pipeline. In this regard, the present review intends to provide an up-to-date outlook on the current green extraction methodologies of marine-origin polysaccharides and their molecular engineering toolbox for designing a multitude of biomaterial platforms for healthcare. Furthermore, we discuss how to foster circular bio-based approaches to pursue the further development of added-value biomedical devices, while preserving the marine ecosystem.
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Affiliation(s)
| | - João Borges
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Fernando J. S. Correia
- Laboratory of Scientific Illustration, Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Ricardo Calado
- Centre for Environmental and Marine Studies (CESAM), Department of Biology, University of Aveiro, Aveiro, Portugal
| | - João M. M. Rodrigues
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Sónia G. Patrício
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - João F. Mano
- CICECO–Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
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6
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Jan S, Mahboob U. Online mentoring: challenges and strategies. Pak J Med Sci 2022; 38:2272-2277. [PMID: 36415261 PMCID: PMC9676597 DOI: 10.12669/pjms.38.8.5804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/28/2021] [Accepted: 09/05/2022] [Indexed: 09/09/2023] Open
Abstract
OBJECTIVES To gain insights into the e-mentoring experience, needs of the stakeholders (mentors and mentees) challenges and strategies to overcome the challenges. METHODS Qualitative exploratory study was conducted in Islamic International Medical College, from February 2021 to July 2021. The study duration was six months. Six 'Semi-structured interviews' of mentors and two 'focus group discussions' with mentees were conducted. A purposeful sampling technique was employed to select the respondents. Data were audio taped and transcribed verbatim. After that analysis of data was done by inductive content analysis. Data were coded line by line. Open codes were combined to form categories, which were combined to form themes through abstraction. RESULTS Data was analyzed by using Atlas.ti. After analyzing data from mentors and mentees, 21 open codes sorted into 15 categories and abstracted to from five major themes. Participants talked about the problems of online sessions like; connectivity issues, impaired interaction, nonspecific goals, unaware of MS Teams use. They suggested strategies to make these sessions more practical; like workshops for training, face to face sessions before online mode, blended approach, careful selection of mentors and mentees. All were satisfied with security and witnessed anonymity and privacy. CONCLUSION Online mentoring can help students feel less lonely through social contact. E-mentoring provides flexibility to those who would usually deal with discrimination to being mentored because of their gender, ethnicity, disability or geographical location.
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Affiliation(s)
- Sadiq Jan
- Dr. Sadiq Jan, FCPS. MHPE. Assistant Professor Obstetrics and Gynecology, Islamic International Medical College, Rawalpindi, Pakistan
| | - Usman Mahboob
- Dr. Usman Mahboob, MBBS, MPH, FHEA (UK), DHPE (UK), Fellow FAIMER (USA). Associate Professor Medical Education, Institute of Health Professions Education & Research, Khyber Medical University, Peshawar, Pakistan
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7
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Guo SS, Wang ZG. Glyceroglycolipids in marine algae: A review of their pharmacological activity. Front Pharmacol 2022; 13:1008797. [PMID: 36339569 PMCID: PMC9633857 DOI: 10.3389/fphar.2022.1008797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 10/10/2022] [Indexed: 12/02/2022] Open
Abstract
Glyceroglycolipids are major metabolites of marine algae and have a wide range of applications in medicine, cosmetics, and chemistry research fields. They are located on the cell surface membranes. Together with glycoproteins and glycosaminoglycans, known as the glycocalyx, they play critical roles in multiple cellular functions and signal transduction and have several biological properties such as anti-oxidant and anti-inflammatory properties, anti-viral activity, and anti-tumor immunity. This article focused on the sources and pharmacological effects of glyceroglycolipids, which are naturally present in various marine algae, including planktonic algae and benthic algae, with the aim to highlight the promising potential of glyceroglycolipids in clinical treatment.
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Affiliation(s)
- Sha-sha Guo
- Key Laboratory of Theory of TCM, Ministry of Education of China, Shandong University of Traditional Chinese Medicine, Jinan, China
- Institute of Traditional Chinese Medicine Literature and Culture, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Zhen-guo Wang
- Key Laboratory of Theory of TCM, Ministry of Education of China, Shandong University of Traditional Chinese Medicine, Jinan, China
- Institute of Traditional Chinese Medicine Literature and Culture, Shandong University of Traditional Chinese Medicine, Jinan, China
- *Correspondence: Zhen-guo Wang,
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8
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Álvarez EA, Klemm K, Hoppenrath M, Cembella A, John U, Karlson B. Temporal and spatial distribution of epibenthic dinoflagellates in the Kattegat-Skagerrak, NE Atlantic-Focus on Prorocentrum lima and Coolia monotis. HARMFUL ALGAE 2022; 118:102318. [PMID: 36195412 PMCID: PMC9580043 DOI: 10.1016/j.hal.2022.102318] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 07/23/2022] [Accepted: 08/30/2022] [Indexed: 06/16/2023]
Abstract
Epibenthic dinoflagellates occur globally and include many toxin-producing species of concern to human health and benthic ecosystem function. Such benthic harmful algal blooms (BHABs) have been well described from tropical and sub-tropical coastal environments, but assessments from north temperate waters, e.g., northern Europe, and polar regions are scarce. The present study addressed the biodiversity and distribution of potentially toxic epibenthic dinoflagellate populations along the west coast of Sweden (Kattegat-Skagerrak) by morphological and molecular criteria. Morphological analysis conducted by light- and electron-microscopy was then linked by DNA barcoding of the V4 region of 18S rRNA gene sequences to interpret taxonomic and phylogenetic relationships. The presence of two potentially toxigenic epibenthic dinoflagellates, Prorocentrum lima (Ehrenberg) F.Stein and Coolia monotis Meunier was confirmed, along with a description of their spatial and temporal distribution. For P. lima, one third of the cell abundance values exceeded official alarm thresholds for potentially toxic BHAB events (>1000 cells gr-1 of macroalgae fresh weight). The same species were recorded consecutively for two summers, but without significant temporal variation in cell densities. SEM analyses confirmed the presence of other benthic Prorocentrum species: P. fukuyoi complex, P. cf. foraminosum and P. cf. hoffmannianum. Analyses of the V4 region of the 18S rRNA gene also indicated the presence P. compressum, P. hoffmannianum, P. foraminosum, P. fukuyoi, and P. nanum. These findings provide the first biogeographical evidence of toxigenic benthic dinoflagellates along the west coast of Sweden, in the absence of ongoing monitoring to include epibenthic dinoflagellates. Harmful events due to the presence of Coolia at shellfish aquaculture sites along the Kattegat-Skagerrak are likely to be rather marginal because C. monotis is not known to be toxigenic. In any case, as a preliminary assessment, the results highlight the risk of diarrhetic shellfish poisoning (DSP) events caused by P. lima, which may affect the development and sustainability of shellfish aquaculture in the region.
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Affiliation(s)
- Elena Alabarces Álvarez
- Swedish Meteorological and Hydrological Institute, Research and Development, Oceanography, Sven Källfelts gata 15, 426 71 Västra Frölunda, Sweden
| | - Kerstin Klemm
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Mona Hoppenrath
- Senckenberg am Meer, Deutsches Zentrum für Marine Biodiversitätsforschung (DZMB) Südstrand 44, D-26382 Wilhelmshaven, Germany
| | - Allan Cembella
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Uwe John
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany; Helmholtz Institute for Functional Marine Biodiversity, Ammerländer Heersstraße 231, 26129 Oldenburg, Germany
| | - Bengt Karlson
- Swedish Meteorological and Hydrological Institute, Research and Development, Oceanography, Sven Källfelts gata 15, 426 71 Västra Frölunda, Sweden.
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Wolfram U, Peña Fernández M, McPhee S, Smith E, Beck RJ, Shephard JD, Ozel A, Erskine CS, Büscher J, Titschack J, Roberts JM, Hennige SJ. Multiscale mechanical consequences of ocean acidification for cold-water corals. Sci Rep 2022; 12:8052. [PMID: 35577824 PMCID: PMC9110400 DOI: 10.1038/s41598-022-11266-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 04/13/2022] [Indexed: 12/03/2022] Open
Abstract
Ocean acidification is a threat to deep-sea corals and could lead to dramatic and rapid loss of the reef framework habitat they build. Weakening of structurally critical parts of the coral reef framework can lead to physical habitat collapse on an ecosystem scale, reducing the potential for biodiversity support. The mechanism underpinning crumbling and collapse of corals can be described via a combination of laboratory-scale experiments and mathematical and computational models. We synthesise data from electron back-scatter diffraction, micro-computed tomography, and micromechanical experiments, supplemented by molecular dynamics and continuum micromechanics simulations to predict failure of coral structures under increasing porosity and dissolution. Results reveal remarkable mechanical properties of the building material of cold-water coral skeletons of 462 MPa compressive strength and 45-67 GPa stiffness. This is 10 times stronger than concrete, twice as strong as ultrahigh performance fibre reinforced concrete, or nacre. Contrary to what would be expected, CWCs retain the strength of their skeletal building material despite a loss of its stiffness even when synthesised under future oceanic conditions. As this is on the material length-scale, it is independent of increasing porosity from exposure to corrosive water or bioerosion. Our models then illustrate how small increases in porosity lead to significantly increased risk of crumbling coral habitat. This new understanding, combined with projections of how seawater chemistry will change over the coming decades, will help support future conservation and management efforts of these vulnerable marine ecosystems by identifying which ecosystems are at risk and when they will be at risk, allowing assessment of the impact upon associated biodiversity.
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Affiliation(s)
- Uwe Wolfram
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK.
| | - Marta Peña Fernández
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK
| | - Samuel McPhee
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK
| | - Ewan Smith
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK
| | - Rainer J Beck
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK
| | - Jonathan D Shephard
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK
| | - Ali Ozel
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK
| | - Craig S Erskine
- School of Engineering and Physical Sciences, Institute of Mechanical, Process and Energy Engineering, Heriot-Watt University, Edinburgh, UK
| | - Janina Büscher
- Biological Oceanography Research Group, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | - Jürgen Titschack
- Marum Center for Marine Sciences, University of Bremen, Bremen, Germany
- Marine Research Department, Senckenberg am Meer, Wilhelmshaven, Germany
| | - J Murray Roberts
- Changing Oceans Research Group, School of GeoSciences, University of Edinburgh, Edinburgh, UK
| | - Sebastian J Hennige
- Changing Oceans Research Group, School of GeoSciences, University of Edinburgh, Edinburgh, UK
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10
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Venney CJ, Wellband KW, Normandeau E, Houle C, Garant D, Audet C, Bernatchez L. Thermal regime during parental sexual maturation, but not during offspring rearing, modulates DNA methylation in brook charr ( Salvelinus fontinalis). Proc Biol Sci 2022; 289:20220670. [PMID: 35506232 PMCID: PMC9065957 DOI: 10.1098/rspb.2022.0670] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 04/11/2022] [Indexed: 01/04/2023] Open
Abstract
Epigenetic inheritance can result in plastic responses to changing environments being faithfully transmitted to offspring. However, it remains unclear how epigenetic mechanisms such as DNA methylation can contribute to multigenerational acclimation and adaptation to environmental stressors. Brook charr (Salvelinus fontinalis), an economically important salmonid, is highly sensitive to thermal stress and is of conservation concern in the context of climate change. We studied the effects of temperature during parental sexual maturation and offspring rearing on whole-genome DNA methylation in brook charr juveniles (fry). Parents were split between warm and cold temperatures during sexual maturation, mated in controlled breeding designs, then offspring from each family were split between warm (8°C) and cold (5°C) rearing environments. Using whole-genome bisulfite sequencing, we found 188 differentially methylated regions (DMRs) due to parental maturation temperature after controlling for family structure. By contrast, offspring rearing temperature had a negligible effect on offspring methylation. Stable intergenerational inheritance of DNA methylation and minimal plasticity in progeny could result in the transmission of acclimatory epigenetic states to offspring, priming them for a warming environment. Our findings have implications pertaining to the role of intergenerational epigenetic inheritance in response to ongoing climate change.
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Affiliation(s)
- Clare J. Venney
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, Canada G1 V 0A6
| | - Kyle W. Wellband
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, Canada G1 V 0A6
| | - Eric Normandeau
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, Canada G1 V 0A6
| | - Carolyne Houle
- Département de Biologie, Université de Sherbrooke, Sherbrooke, QC, Canada J1 K 2R1
| | - Dany Garant
- Département de Biologie, Université de Sherbrooke, Sherbrooke, QC, Canada J1 K 2R1
| | - Céline Audet
- Institut des sciences de la mer de Rimouski (ISMER), Université du Québec à Rimouski (UQAR), Rimouski, QC, Canada G5 L 2Z9
| | - Louis Bernatchez
- Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, QC, Canada G1 V 0A6
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11
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Gelippi M, Caraveo-Patiño J, Gauger MFW, Popp BN, Panigada S, Marcín-Medina R. Isotopic composition of the eastern gray whale epidermis indicates contribution of prey outside Arctic feeding grounds. Sci Rep 2022; 12:7055. [PMID: 35488113 PMCID: PMC9054758 DOI: 10.1038/s41598-022-10780-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 04/08/2022] [Indexed: 11/09/2022] Open
Abstract
Eastern gray whales' distribution range and plasticity in feeding behavior complicates the understanding of critical life-history such as pregnancy and lactation. Our goal was to determine if females who experienced gestation, gave birth, and lactated their calves, assimilated a high proportion of benthic amphipods from the Bering Sea, which are considered the species' main prey. We used Bayesian stable isotope mixing models to estimate the probability of contribution of food items sampled along the species' distributional range, using isotopic data on amphipods from the Bering Sea, mysids from Vancouver Island, and amphipods and polychaetes from Ojo de Liebre Lagoon. We sampled epidermal tissue from lactating females (n = 25) and calves (n = 34) and analyzed their carbon and nitrogen isotopic composition. Model outcome indicated that benthic amphipods from the Bering Sea were not the primary food for the eastern gray whale. Each mother performed a different feeding strategy, and prey from Vancouver Island were generally as important as that from the Bering Sea. Moreover, model results indicate a constant use of Ojo de Liebre Lagoon as a feeding ground. Our results appear to agree with previous studies that report continuous feeding by females to satisfy certain physiological requirements (e.g., fatty acids omega-6) during migration and breeding time. Future investigations of the isotopic composition of all those prey items that could be assimilated by the eastern gray whale emerge as critical. Both historical and recent information, that would provide insights in the species feeding ecology under past and present environmental conditions, should be considered as equally important to establish conservation and management plans.
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Affiliation(s)
- Michelle Gelippi
- Centro de Investigaciones Biológicas del Noroeste S.C., La Paz, B.C.S., México
| | | | - Marco F W Gauger
- Centro de Investigaciones Biológicas del Noroeste S.C., La Paz, B.C.S., México
| | - Brian N Popp
- Department of Earth Sciences, University of Hawaii at Manoa, Honolulu, HI, USA
| | | | - Rocío Marcín-Medina
- Asociación de Investigación y Conservación de Mamíferos Marinos y su Hábitat A.C., La Paz, B.C.S., México
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12
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McDonough LK, Andersen MS, Behnke MI, Rutlidge H, Oudone P, Meredith K, O'Carroll DM, Santos IR, Marjo CE, Spencer RGM, McKenna AM, Baker A. A new conceptual framework for the transformation of groundwater dissolved organic matter. Nat Commun 2022; 13:2153. [PMID: 35444183 PMCID: PMC9021313 DOI: 10.1038/s41467-022-29711-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 03/16/2022] [Indexed: 11/09/2022] Open
Abstract
Groundwater comprises 95% of the liquid fresh water on Earth and contains a diverse mix of dissolved organic matter (DOM) molecules which play a significant role in the global carbon cycle. Currently, the storage times and degradation pathways of groundwater DOM are unclear, preventing an accurate estimate of groundwater carbon sources and sinks for global carbon budgets. Here we reveal the transformations of DOM in aging groundwater using ultra-high resolution mass spectrometry combined with radiocarbon dating. Long-term anoxia and a lack of photodegradation leads to the removal of oxidised DOM and a build-up of both reduced photodegradable formulae and aerobically biolabile formulae with a strong microbial signal. This contrasts with the degradation pathway of DOM in oxic marine, river, and lake systems. Our findings suggest that processes such as groundwater extraction and subterranean groundwater discharge to oceans could result in up to 13 Tg of highly photolabile and aerobically biolabile groundwater dissolved organic carbon released to surface environments per year, where it can be rapidly degraded. These findings highlight the importance of considering groundwater DOM in global carbon budgets.
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Affiliation(s)
- Liza K McDonough
- Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Rd, Lucas Heights, NSW, 2234, Australia. .,Connected Waters Initiative Research Centre, UNSW Sydney, Sydney, NSW, 2052, Australia.
| | - Martin S Andersen
- Connected Waters Initiative Research Centre, UNSW Sydney, Sydney, NSW, 2052, Australia.,School of Civil and Environmental Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Megan I Behnke
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, 32310, USA
| | - Helen Rutlidge
- Connected Waters Initiative Research Centre, UNSW Sydney, Sydney, NSW, 2052, Australia.,School of Civil and Environmental Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Phetdala Oudone
- Connected Waters Initiative Research Centre, UNSW Sydney, Sydney, NSW, 2052, Australia.,School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Karina Meredith
- Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Rd, Lucas Heights, NSW, 2234, Australia
| | - Denis M O'Carroll
- Connected Waters Initiative Research Centre, UNSW Sydney, Sydney, NSW, 2052, Australia.,School of Civil and Environmental Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Isaac R Santos
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, 2450, Australia
| | - Christopher E Marjo
- Mark Wainwright Analytical Centre, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Robert G M Spencer
- Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, 32310, USA
| | - Amy M McKenna
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310-4005, USA
| | - Andy Baker
- Connected Waters Initiative Research Centre, UNSW Sydney, Sydney, NSW, 2052, Australia.,School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, 2052, Australia
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13
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Ferraz MA, Kiyama AC, Primel EG, Barbosa SC, Castro ÍB, Choueri RB, Gallucci F. Does pH variation influence the toxicity of organic contaminants in estuarine sediments? Effects of Irgarol on nematode assemblages. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152944. [PMID: 35007601 DOI: 10.1016/j.scitotenv.2022.152944] [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: 10/13/2021] [Revised: 12/21/2021] [Accepted: 01/03/2022] [Indexed: 06/14/2023]
Abstract
Natural pH values in coastal waters vary largely among locations, ecosystems, and time periods; still, there is an ongoing acidification trend. In this scenario, more acidic pH values can alter bioavailability of organic contaminants, to organisms. Despite this, interactive effects between pH and chemical substances are not usually considered in Ecological Risk Assessment protocols. This study investigated the effects of pH on the toxicity of a hydrophobic organic compound on a benthic community using a microcosm experiment setup to assess the response of nematode assemblages exposed to environmentally relevant concentrations of Irgarol at two natural pH conditions. Estuarine nematode assemblages were exposed to two concentrations of Irgarol at pH 7.0 and 8.0 for periods of 7 and 35 days. Lower diversity of nematode genera was observed at the highest tested Irgarol concentration (1281 ± 65 ng.g-1). The results showed that the effects of Irgarol contamination were independent of pH variation, indicating no influence of acidification within this range on the toxicity of Irgarol to benthic meiofauna. However, the results showed that estuarine nematode assemblages are impacted by long-term exposure to low (but naturally occurring) pHs. This indicates that estuarine organisms may be under naturally high physiological pressure and that permanent changes in the ecosystem's environmental factors, such as future coastal ocean acidification, may drive organisms closer to the edges of their tolerance windows.
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Affiliation(s)
- Mariana Aliceda Ferraz
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
| | - Ana Carolina Kiyama
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
| | - Ednei Gilberto Primel
- Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, RS 96201-900, Brazil
| | - Sergiane Caldas Barbosa
- Escola de Química e Alimentos, Laboratório de Análise de Compostos Orgânicos e Metais (LACOM), Universidade Federal do Rio Grande, Av Itália, km 8, Rio Grande, RS 96201-900, Brazil
| | - Ítalo Braga Castro
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
| | - Rodrigo Brasil Choueri
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil.
| | - Fabiane Gallucci
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100 Santos, SP, Brazil
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14
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Guedes GHS, Araújo FG. Underwater drones reveal different fish community structures on the steep slopes of a tropical reservoir. HYDROBIOLOGIA 2022; 849:1301-1312. [PMID: 35125510 PMCID: PMC8800835 DOI: 10.1007/s10750-021-04790-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 12/13/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
UNLABELLED A new approach for visual fish survey in reservoirs using underwater drones (remotely operated vehicle- ROV) is presented. The ROV was applied to identify abiotic gradients and to compare fish assemblages on the steep slopes in a tropical reservoir. The tested hypothesis is that fish are concentrated in the littoral zone due to the better physicochemical and habitat conditions, compared to deep and hypoxic layers. Twelve species were recorded (seven native, five exotic), with all species occurring in the littoral zone, seven species in the transition, and four in the profundal zone. A greater fish abundance and richness was found in the littoral zone corroborating the main hypothesis. The littoral zone was dominated by exotic cichlids (Cichla spp., Coptodon rendalli), while native catfish (Loricariichthys castaneus, Pimelodella lateristriga) occupied deeper areas. The fish distribution seems to be driven by local factors, such as oxygen availability and habitat structure. The preference for the littoral zone by alien cichlids may have led to the extirpation/decrease of native characids and induced catfishes to occupy deep habitats. Underwater drones can be a valuable tool for the simultaneous collection of abiotic/biotic data, especially in deep reservoirs with complex habitats, resulting in advances in the environmental monitoring. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10750-021-04790-9.
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Affiliation(s)
- Gustavo Henrique Soares Guedes
- Laboratório de Ecologia de Peixes, Universidade Federal Rural Do Rio de Janeiro, Km 7, BR-465, 23890-000, Seropédica, Rio de Janeiro, Brazil
| | - Francisco Gerson Araújo
- Laboratório de Ecologia de Peixes, Universidade Federal Rural Do Rio de Janeiro, Km 7, BR-465, 23890-000, Seropédica, Rio de Janeiro, Brazil
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15
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Nilsson E, Sadler-Riggleman I, Beck D, Skinner MK. Differential DNA methylation in somatic and sperm cells of hatchery vs wild (natural-origin) steelhead trout populations. ENVIRONMENTAL EPIGENETICS 2021; 7:dvab002. [PMID: 34040807 PMCID: PMC8132314 DOI: 10.1093/eep/dvab002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 03/09/2021] [Accepted: 03/01/2021] [Indexed: 05/06/2023]
Abstract
Environmental factors such as nutrition, stress, and toxicants can influence epigenetic programming and phenotypes of a wide variety of species from plants to humans. The current study was designed to investigate the impacts of hatchery spawning and rearing on steelhead trout (Oncorhynchus mykiss) vs the wild fish on a molecular level. Additionally, epigenetic differences between feeding practices that allow slow growth (2 years) and fast growth (1 year) hatchery trout were investigated. The sperm and red blood cells (RBC) from adult male slow growth/maturation hatchery steelhead, fast growth/maturation hatchery steelhead, and wild (natural-origin) steelhead were collected for DNA preparation to investigate potential alterations in differential DNA methylation regions (DMRs) and genetic mutations, involving copy number variations (CNVs). The sperm and RBC DNA both had a large number of DMRs when comparing the hatchery vs wild steelhead trout populations. The DMRs were cell type specific with negligible overlap. Slow growth/maturation compared to fast growth/maturation steelhead also had a larger number of DMRs in the RBC samples. A number of the DMRs had associated genes that were correlated to various biological processes and pathologies. Observations demonstrate a major epigenetic programming difference between the hatchery and wild natural-origin fish populations, but negligible genetic differences. Therefore, hatchery conditions and growth/maturation rate can alter the epigenetic developmental programming of the steelhead trout. Interestingly, epigenetic alterations in the sperm allow for potential epigenetic transgenerational inheritance of phenotypic variation to future generations. The impacts of hatchery exposures are not only important to consider on the fish exposed, but also on future generations and evolutionary trajectory of fish in the river populations.
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Affiliation(s)
- Eric Nilsson
- Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA
| | - Ingrid Sadler-Riggleman
- Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA
| | - Daniel Beck
- Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA
| | - Michael K Skinner
- Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA
- Correspondence address. Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA. Tel: +1-509-335-1524; E-mail:
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