1
|
Abu-Zied RH, Orif MI, Bantan RA, Al-Farawati R, Ghandourah MA, Aljahdali MH. Sources and pathways of carbon and nitrogen of macrophytes and sediments using stable isotopes in Al-Kharrar Lagoon, eastern Red Sea coast, Saudi Arabia. PLoS One 2024; 19:e0299562. [PMID: 38662683 PMCID: PMC11045092 DOI: 10.1371/journal.pone.0299562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/13/2024] [Indexed: 04/28/2024] Open
Abstract
Elemental ratios (δ13C, δ15N and C/N) and carbon and nitrogen concentrations in macrophytes, sediments and sponges of the hypersaline Al-Kharrar Lagoon (KL), central eastern Red Sea coast, were measured to distinguish their sources, pathways and see how they have been influenced by biogeochemical processes and terrestrial inputs. The mangroves and halophytes showed the most depleted δ13C values of -27.07±0.2 ‰ and -28.34±0.4 ‰, respectively, indicating their preferential 12C uptake, similar to C3-photosynthetic plants, except for the halophytes Atriplex sp. and Suaeda vermiculata which showed δ13C of -14.31±0.6 ‰, similar to C4-plants. Macroalgae were divided into A and B groups based on their δ13C values. The δ13C of macroalgae A averaged -15.41±0.4 ‰, whereas macroalgae B and seagrasses showed values of -7.41±0.8 ‰ and -7.98 ‰, suggesting uptake of HCO3- as a source for CO2 during photosynthesis. The δ13C of sponges was -10.7±0.3 ‰, suggesting that macroalgae and seagrasses are their main favoured diets. Substrates of all these taxa showed δ13C of -15.52±0.8 ‰, suggesting the KL is at present a macroalgae-dominated lagoon. The δ15N in taxa/sediments averaged 1.68 ‰, suggesting that atmospheric N2-fixation is the main source of nitrogen in/around the lagoon. The heaviest δ15N (10.58 ‰) in halophytes growing in algal mats and sabkha is possibly due to denitrification and ammonia evaporation. The macrophytes in the KL showed high C %, N %, and C/N ratios, but this is not indicated in their substrates due possibly to a rapid turnover of dense, hypersaline waters carrying most of the detached organic materials out into the Red Sea. The δ13C allowed separation of subaerial from aquatic macrophytes, a proxy that could be used when interpreting paleo-sea level or paleoclimatic changes from the coastal marine sediments.
Collapse
Affiliation(s)
- Ramadan H. Abu-Zied
- Marine Geology Department, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Geology Department, Faculty of Science, Mansoura University, El-Mansoura, Egypt
| | - Mohammed I. Orif
- Marine Chemistry Department, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Rashad A. Bantan
- Marine Geology Department, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Radwan Al-Farawati
- Marine Chemistry Department, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed A. Ghandourah
- Marine Chemistry Department, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed H. Aljahdali
- Marine Geology Department, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
2
|
Okumura Y, Furutono T, Ito K, Hara M. Influence of submarine topography and sediment environment on microbial assemblages in a coastal lagoon in northeastern Japan. MARINE POLLUTION BULLETIN 2023; 194:115404. [PMID: 37591020 DOI: 10.1016/j.marpolbul.2023.115404] [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: 01/26/2023] [Revised: 07/10/2023] [Accepted: 08/06/2023] [Indexed: 08/19/2023]
Abstract
The relationships among eutrophication, anoxia, and microbial distribution were investigated for Nagatsura-Ura Lagoon on the northeastern Pacific coast of Japan. In September 2017, the bottom environment in a small area of the inner part of the lagoon (which has a basin-shaped bottom topology) was eutrophic and anoxic, with high carbon, nitrogen, phosphate, acid-volatile sulfide, and low dissolved oxygen and oxidation-reduction potential. Dissolved oxygen levels improved during the winter. Bacillariophyta (diatoms) were the main organic component according to pigment analysis and next-generation sequencing of nucleic acids in seawater samples. Phylum Proteobacteria was dominant among the bacterial flora in the sediment but the proportions of Class Epsilon-proteobacteria and Chlorobium (a green sulfur-utilizing bacterium) were high in the inner part of the lagoon compared to other stations, and these groups were also present in winter. Apparently groups able to thrive in both anoxic and aerobic conditions were predominant in the inner part of the lagoon.
Collapse
Affiliation(s)
- Yutaka Okumura
- Fisheries Resources Institute, National Research and Development Agency, Japan Fisheries Research and Education Agency, 3-27-5 Shinhama, Shiogama, Miyagi 985-0001, Japan.
| | - Tarou Furutono
- IDEA Consultants Inc., 1-1-11, Nishikimachi, Aoba, Sendai, Miyagi 980-0012, Japan
| | - Kinuko Ito
- Graduate School of Agricultural Science, Tohoku University, 468-1, Aramaki, Aoba, Aoba, Sendai, Miyagi 980-0845 Japan
| | - Motoyuki Hara
- Graduate School of Agricultural Science, Tohoku University, 468-1, Aramaki, Aoba, Aoba, Sendai, Miyagi 980-0845 Japan
| |
Collapse
|
3
|
Microbial Origin of the Organic Matter Preserved in the Cayo Coco Lagoonal Network, Cuba. MINERALS 2020. [DOI: 10.3390/min10020143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The southern part of the tropical Cayo Coco Island (Cuba) hosts a complex, highly evaporative and marine-fed lagoonal network. In the easternmost lagoon of this network, hypersaline conditions favour the development of complex sedimentary microbial ecosystems within the water column at the bottom water-sediment interface and on the shore. Some of these ecosystems are producing microbial mats and biofilms with variable mineralisation rates, depending on their location. Since the mineralisation of these microbial deposits is rare, the sedimentary record does not provide a direct window on the evolution of these ecosystems or their distribution through space and time. However, microbial deposits also produce copious amounts of organic matter, which may be used to decipher any microbial-related origin within the sedimentary record. Microbial mats and biofilms were identified as the potential source of organic material in addition to the surrounding mangrove, soils and suspended particulate matter (SPM). The origin and evolution of the sedimentary organic matter preserved within the lagoonal sediments has been analysed using geochemical parameters such as elemental (TOC, TN and [C/N]atomic ratio) and isotopic (δ13Corg and δ15NTN) signals on four sedimentary cores retrieved from different locations in the lagoon and compared with the geochemical signatures of the potential sources. Despite the high potential for organic matter accumulation in the studied lagoon, the TOC and TN downcore values in sediments that were analysed (i.e., micritic muds and bioclastic sands) remain very low compared to the sediment-water interface. The relative contributions of the different potential sources of organic matter were estimated using [C/N]atomic ratios and δ13Corg values. The δ15NTN signature was discarded as a source signature as it records synsedimentary, early diagenetic, secondary evolution of the nitrogen signal associated with OM remineralisation (i.e., denitrification). Finally, among the microbial deposits, the slime recognised in the permanently submersed zone of the waterbody appears to be the main contributor to the organic matter preserved within the sediments of the lagoon. SPM, mainly composed of microbial-rich particles, also contribute and cannot be ruled out as a source.
Collapse
|
4
|
Spatial and temporal distribution in the biochemical composition of sedimentary organic matter in a tropical estuary along the west coast of India. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-018-0128-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
5
|
Álvarez-Vázquez MÁ, González-Prieto SJ, Prego R. Possible impact of environmental policies in the recovery of a Ramsar wetland from trace metal contamination. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 637-638:803-812. [PMID: 29758435 DOI: 10.1016/j.scitotenv.2018.05.022] [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: 01/15/2018] [Revised: 04/26/2018] [Accepted: 05/02/2018] [Indexed: 06/08/2023]
Abstract
The Umia-Grove Intertidal Complex is located within the Ria of Arousa (NW Iberian Peninsula). Out of its significance for wintering shorebirds it has been included in the Ramsar List of Wetlands of International Importance as well as in international protection networks such as the European Natura 2000 and Important Bird and Biodiversity Areas-BirdLife International. In a sediment analysis conducted in the year 1999, the wetland was found to have been contaminated by potentially toxic trace metals, to wit: Cr, Cu, Ni, and Pb. Sediment samples retrieved in 2014 to make an updated assessment of the condition of the ecosystem showed evidence of the presence of selected trace elements, namely, Cd, Co, Cr, Cu, Ni, Pb, and Zn, within or slightly above the background ranges of local, regional, and general references. In the 15-year time frame between the two samplings there has been noticeable change in the relationship between nature and society as a consequence of the entry into force of a number of regulations aimed at avoiding the emission of contaminants; among others, the ban of Pb in gasoline, the deployment of wastewater treatment plants according to the European Water Framework Directive, and the limitation of the use of Cu pesticides. With the ensuing drop of human pressure, the self-purifying capacity of the ecosystem has effectively contributed to the wetland's recovery. Nevertheless, the application of a normalized enrichment factor to the more recent set of samples suggests the presence of relict low contamination by Cd, Cu, and Ni in localized areas. The compared analysis of the wetland condition in the two years is a sign of the success of the policies and regulations for environmental protection, but further work and more effectiveness are necessary in order to preserve threatened ecosystems of such importance as the Umia-Grove wetland.
Collapse
Affiliation(s)
- Miguel Ángel Álvarez-Vázquez
- Department of History, Art and Geography, GEAAT Group, University of Vigo, As Lagoas s/n, 32004 Ourense, Spain; Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, 36208 Vigo, Spain.
| | - Serafín Jesús González-Prieto
- Instituto de Investigaciones Agrobiológicas de Galicia (IIAG-CSIC), Av. de Vigo s/n, Campus Universitario Sur, 15780 Santiago de Compostela, Spain
| | - Ricardo Prego
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, 36208 Vigo, Spain
| |
Collapse
|
6
|
Natali C, Bianchini G. Natural vs anthropogenic components in sediments from the Po River delta coastal lagoons (NE Italy). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:2981-2991. [PMID: 29260480 DOI: 10.1007/s11356-017-0986-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 12/10/2017] [Indexed: 06/07/2023]
Abstract
The Sacca di Goro and Sacca di Scardovari are two coastal lagoons of the Po River delta facing the northern Adriatic Sea. They are sensitive ecosystems both from the naturalistic and socio-economic point of view, since they are included in a natural park and are high productivity shellfish sites. Bottom sediments from the two lagoons have been analysed for their textural and geochemical (major and trace elements by XRF) composition in order to identify natural backgrounds and anthropogenic inputs. OC, N and δ13COC data have been also carried out by EA-IRMS to highlight the association of heavy metals with inorganic or organic sedimentary components. Results show that abundances of siderophile (Cr, Ni, Co) heavy metals in samples from the two lagoons are generally in the range of those recorded in alluvial sediments from the neighbours and are associated with the finest (clayey) fraction. Among chalcophile heavy metals, Pb and Zn display significant enrichments relative to the local geochemical backgrounds suggesting anthropogenic sources. They appear to be preferentially associated with the sedimentary organic matter that, according to the isotopic composition, is mainly formed by the incorporation of different proportions of macroalgae and macrophytes that have a significant bioaccumulation capacity. Taking into consideration that the extent of the algal biomass is sensitive to anthropogenic pressure and climatic changes, the trace element budget of sediments from these lagoons has to be monitored in the future, also to assess the impact of heavy metals on shellfish production.
Collapse
Affiliation(s)
- Claudio Natali
- Department of Physics and Earth Sciences, University of Ferrara, Saragat 1, 44123, Ferrara, Italy
| | - Gianluca Bianchini
- Department of Physics and Earth Sciences, University of Ferrara, Saragat 1, 44123, Ferrara, Italy.
| |
Collapse
|
7
|
Misic C, Gaozza L, Petrillo M, Covazzi Harriague A. The allochthonous material input in the trophodynamic system of the shelf sediments of the Gulf of Tigullio (Ligurian Sea, NW Mediterranean). MARINE ENVIRONMENTAL RESEARCH 2016; 120:9-19. [PMID: 27419366 DOI: 10.1016/j.marenvres.2016.07.001] [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: 03/24/2016] [Revised: 06/28/2016] [Accepted: 07/04/2016] [Indexed: 06/06/2023]
Abstract
The organic allochthonous material input in the benthic system of a NW Mediterranean shelf area was studied using a three-pronged approach, focusing firstly on the evaluation of the sedimentary stable isotope ratios and organic matter (OM) composition, then on the OM recycling processes performed by the microbial organisms, and finally on the potential trophic relationships between the macrobenthic organisms. The highest allochthonous signal, indicating continental input, was observed within the 50-m isobath, while at the 80-m isobath the marine signal was higher, pointing to a rather low continental influence approximately 5 km from the shore. Heavier rainfall, often generating abrupt allochthonous inputs by river outfalls, led to a wider spread of fine sediment particles. Carbohydrates were the compounds that best represented the continental input and these compounds were associated with potential recycling activities by microbiota, pointing to the entry of these C-containing allochthonous materials into the microbial food web. The macrofaunal deposit-feeders used sedimentary OM characterised by a continental signature as a food source, although the isotopic ratios of the organisms also pointed to selective feeding on materials that had a marine signature, especially at our offshore sampling stations. Predators fed on deposit- or suspension-feeders, with a potential selection of the latter during the highest inputs of continental materials occurring in winter.
Collapse
Affiliation(s)
- Cristina Misic
- Dipartimento di Scienze Della Terra, Dell'Ambiente e Della Vita (DiSTAV), Università di Genova, C.so Europa 26, 16132 Genova, Italy.
| | - Luigi Gaozza
- Dipartimento di Scienze Della Terra, Dell'Ambiente e Della Vita (DiSTAV), Università di Genova, C.so Europa 26, 16132 Genova, Italy
| | - Mario Petrillo
- Dipartimento di Scienze Della Terra, Dell'Ambiente e Della Vita (DiSTAV), Università di Genova, C.so Europa 26, 16132 Genova, Italy
| | - Anabella Covazzi Harriague
- Dipartimento di Scienze Della Terra, Dell'Ambiente e Della Vita (DiSTAV), Università di Genova, C.so Europa 26, 16132 Genova, Italy
| |
Collapse
|
8
|
Lemesle S, Mussio I, Rusig AM, Menet-Nédélec F, Claquin P. Impact of seaweed beachings on dynamics of δ(15)N isotopic signatures in marine macroalgae. MARINE POLLUTION BULLETIN 2015; 97:241-254. [PMID: 26095988 DOI: 10.1016/j.marpolbul.2015.06.010] [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: 03/25/2015] [Revised: 06/03/2015] [Accepted: 06/04/2015] [Indexed: 06/04/2023]
Abstract
A fine-scale survey of δ(15)N, δ(13)C, tissue-N in seaweeds was conducted using samples from 17 sampling points at two sites (Grandcamp-Maisy (GM), Courseulles/Mer (COU)) along the French coast of the English Channel in 2012 and 2013. Partial triadic analysis was performed on the parameter data sets and revealed the functioning of three areas: one estuary (EstA) and two rocky areas (GM(∗), COU(∗)). In contrast to oceanic and anthropogenic reference points similar temporal dynamics characterized δ(15)N signatures and N contents at GM(∗) and COU(∗). Nutrient dynamics were similar: the N-concentrations in seawater originated from the River Seine and local coastal rivers while P-concentrations mainly from these local rivers. δ(15)N at GM(∗) were linked to turbidity suggesting inputs of autochthonous organic matter from large-scale summer seaweed beachings made up of a mixture of Rhodophyta, Phaeophyta and Chlorophyta species. This study highlights the coupling between seaweed beachings and nitrogen sources of intertidal macroalgae.
Collapse
Affiliation(s)
- Stéphanie Lemesle
- Normandie Université, Université de Caen Basse-Normandie, F-14032 Caen, France; UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UniCaen, Esplanade de la Paix, F-14032 Caen, France
| | - Isabelle Mussio
- Normandie Université, Université de Caen Basse-Normandie, F-14032 Caen, France; UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UniCaen, Esplanade de la Paix, F-14032 Caen, France.
| | - Anne-Marie Rusig
- Normandie Université, Université de Caen Basse-Normandie, F-14032 Caen, France; UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UniCaen, Esplanade de la Paix, F-14032 Caen, France
| | - Florence Menet-Nédélec
- IFREMER, Laboratoire Environnement Ressources de Normandie, Avenue du Général de Gaulle, 14520 Port-en-Bessin, France
| | - Pascal Claquin
- Normandie Université, Université de Caen Basse-Normandie, F-14032 Caen, France; UMR BOREA, CNRS-7208, IRD-207, MNHN, UPMC, UniCaen, Esplanade de la Paix, F-14032 Caen, France
| |
Collapse
|