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Thomson T, Ellis JI, Fusi M, Prinz N, Lundquist CJ, Bury SJ, Shankar U, Cary SC, Pilditch CA. Effects of catchment land use on temperate mangrove forests. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 940:173579. [PMID: 38823713 DOI: 10.1016/j.scitotenv.2024.173579] [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: 12/16/2023] [Revised: 05/25/2024] [Accepted: 05/25/2024] [Indexed: 06/03/2024]
Abstract
Human land use changes are threatening the integrity and health of coastal ecosystems worldwide. Intensified land use for anthropogenic purposes increases sedimentation rates, pollutants, and nutrient concentrations into adjacent coastal areas, often with detrimental effects on marine life and ecosystem functioning. However, how these factors interact to influence ecosystem health in mangrove forests is poorly understood. This study investigates the effects of catchment human land use on mangrove forest architecture and sedimentary attributes at a landscape-scale. Thirty sites were selected along a gradient of human land use within a narrow latitudinal range, to minimise the effects of varying climatic conditions. Land use was quantified using spatial analysis tools with existing land use databases (LCDB5). Twenty-six forest architectural and sedimentary variables were collected from each site. The results revealed a significant effect of human land use on ten out of 26 environmental variables. Eutrophication, characterised by changes in redox potential, pH, and sediment nutrient concentrations, was strongly associated with increasing human land use. The δ15N values of sediments and leaves also indicated increased anthropogenic nitrogen input. Furthermore, the study identified a positive correlation between human land use and tree density, indicating that increased nutrient delivery from catchments contributes to enhanced mangrove growth. Propagule and seedling densities were also positively correlated with human land use, suggesting potential recruitment success mechanisms. This research underpins the complex interactions between human land use and mangrove ecosystems, revealing changes in carbon dynamics, potential alterations in ecosystem services, and a need for holistic management approaches that consider the interconnectedness of species and their environment. These findings provide essential insights for regional ecosystem models, coastal management, and restoration strategies to address the impacts of human pressures on temperate mangrove forests, even in estuaries that may be relatively healthy.
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Affiliation(s)
- Timothy Thomson
- University of Waikato, School of Science, Tauranga, New Zealand.
| | - Joanne I Ellis
- University of Waikato, School of Science, Tauranga, New Zealand
| | - Marco Fusi
- Dove Marine Laboratory, School of Natural and Environmental Sciences, Newcastle University, Newcastle-upon-Tyne 1NE 7RU, United Kingdom
| | - Natalie Prinz
- University of Waikato, School of Science, Tauranga, New Zealand
| | - Carolyn J Lundquist
- National Institute of Water and Atmospheric Research, Hamilton, New Zealand; School of Environment, University of Auckland, Auckland, New Zealand
| | - Sarah J Bury
- National Institute of Water and Atmospheric Research, Wellington, New Zealand
| | - Ude Shankar
- National Institute of Water and Atmospheric Research, Christchurch, New Zealand
| | - S Craig Cary
- School of Science, University of Waikato, Hamilton, New Zealand
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Chenet T, Schwarz G, Neff C, Hattendorf B, Günther D, Martucci A, Cescon M, Baldi A, Pasti L. Scallop shells as biosorbents for water remediation from heavy metals: Contributions and mechanism of shell components in the adsorption of cadmium from aqueous matrix. Heliyon 2024; 10:e29296. [PMID: 38601540 PMCID: PMC11004421 DOI: 10.1016/j.heliyon.2024.e29296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 03/05/2024] [Accepted: 04/04/2024] [Indexed: 04/12/2024] Open
Abstract
To ascertain their potential for heavy metal pollution remedy, we studied the adsorption mechanism of cadmium onto scallop shells and the interactions between the heavy metal and the shell matrix. Intact shells were used to investigate the uptake and diffusion of the metal contaminant onto the shell carbonatic layers, as well as to evaluate the distribution of major and trace elements in the matrix. LA-ICPMS measurements demonstrate that Cd is adsorbed on a very thin layer on the inner and outer surfaces of the shell. Structural and thermal analyses showed the presence of 9 wt.-% of a CdCO3 phase indicating that the adsorption is mainly a superficial process which involves different processes, including ion exchange of Ca by Cd. In addition, organic components of the shell could contribute to adsorption as highlighted by different metal uptake observed for shells with different colours. In particular, darker shells appeared to adsorb more contaminant than the white ones. The contribution of the organic shell components on the adsorption of heavy metals was also highlighted by the element bulk content which showed higher concentrations of different metals in the darker specimen. Raman spectroscopy allowed to identify the pigments as carotenoids, confirmed by XRD measurements which highlighted the presence of astaxanthin phases. The results presented here provide new insights into the Cd adsorption mechanism highlighting the important contribution given by the organic components present in the biogenic carbonate matrix. Furthermore, the high efficiency of Cd removal from water by scallop shells, supported by adsorption kinetic and isotherm studies, has been demonstrated.
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Affiliation(s)
- Tatiana Chenet
- Department of Environment and Prevention Sciences, University of Ferrara, Via Borsari, 46, 44121, Ferrara, Italy
| | - Gunnar Schwarz
- Laboratory of Inorganic Chemistry, ETH Zürich, Vladimir-Prelog-Weg, 1, 8093, Zürich, Switzerland
| | - Christoph Neff
- Laboratory of Inorganic Chemistry, ETH Zürich, Vladimir-Prelog-Weg, 1, 8093, Zürich, Switzerland
| | - Bodo Hattendorf
- Laboratory of Inorganic Chemistry, ETH Zürich, Vladimir-Prelog-Weg, 1, 8093, Zürich, Switzerland
| | - Detlef Günther
- Laboratory of Inorganic Chemistry, ETH Zürich, Vladimir-Prelog-Weg, 1, 8093, Zürich, Switzerland
| | - Annalisa Martucci
- Department of Physics and Earth Science, University of Ferrara, Via Saragat, 1, 44122, Ferrara, Italy
| | - Mirco Cescon
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Borsari, 46, 44121, Ferrara, Italy
| | - Andrea Baldi
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Borsari, 46, 44121, Ferrara, Italy
| | - Luisa Pasti
- Department of Environment and Prevention Sciences, University of Ferrara, Via Borsari, 46, 44121, Ferrara, Italy
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Doyle B, Bendell LI. An evaluation of the efficacy of shell hash for the mitigation of intertidal sediment acidification. Ecosphere 2022. [DOI: 10.1002/ecs2.4003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Bridget Doyle
- Ecotoxicology Research Group, Department of Biological Sciences Simon Fraser University Burnaby British Columbia Canada
| | - Leah I. Bendell
- Ecotoxicology Research Group, Department of Biological Sciences Simon Fraser University Burnaby British Columbia Canada
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