Professor at RMIT. Director, Centre for Nature Positive Solutions. Blue carbon, wetlands, nature markets. Account not actively maintained.
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Articles by Peter Macreadie
Marine carbon removal at a crossroads
Marine carbon dioxide removal must advance through rigorous, transparent science, but caution cannot become paralysis. With billions of tonnes of carbon removal likely to be needed each year, we need to test promising approaches responsibly while uncertainty remains.
Can floating wetlands decrease wastewater emissions?
Our new research found a surprisingly simple way to cut greenhouse gas emissions from open wastewater treatment lagoons: growing plants on buoyant rafts. Water treatment companies have made progress in reducing emissions from their operations, including switching to renewable energy. But the greenhouse gases produced by the biological and chemical processes used to treat wastewater - particularly in open treatment ponds - are harder to tackle.
Floating Wetlands a Promising Way to Decrease Wastewater Emissions
Treating dirty waste water solves one environmental problem but creates another by releasing large amounts of climate emissions. As microorganisms break down sewage, they release carbon dioxide, methane and nitrous oxide – three potent greenhouse gases. Our new research found a surprisingly simple way to cut greenhouse gas emissions from open wastewater treatment lagoons: growing plants on buoyant rafts.
Floating wetlands a promising way to decrease wastewater emissions: new research
Treating dirty waste water solves one environmental problem but creates another by releasing large amounts of climate emissions. As microorganisms break down sewage, they release carbon dioxide, methane and nitrous oxide – three potent greenhouse gases. Our new research found a surprisingly simple way to cut greenhouse gas emissions from open wastewater treatment lagoons: growing plants on buoyant rafts.
Floating wetlands a promising way to decrease wastewater emissions: new research
Treating dirty waste water solves one environmental problem but creates another by releasing large amounts of climate emissions. As microorganisms break down sewage, they release carbon dioxide, methane and nitrous oxide – three potent greenhouse gases. Our new research found a surprisingly simple way to cut greenhouse gas emissions from open wastewater treatment lagoons: growing plants on buoyant rafts.
Global blue carbon losses from salt marshes exceed restoration gains
Abstract Salt marsh soil organic carbon (SOC) is a key blue carbon pool affected by both disturbance and restoration; yet its long-term global dynamics remains poorly understood. Here we provide the global assessment of surface SOC changes in salt marshes from 2002 to 2019, combining multi-source remote sensing imagery with the machine learning calibrated by field observations.
Priority questions for the next decade of blue carbon science
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Abstract Blue carbon ecosystems, classically defined as mangroves, tidal marshes and seagrasses, but increasingly expanded to include ecosystems such as tidal flats, macroalgal forests and shelf sediments, contribute to climate change mitigation and biodiversity support.
By Peter Macreadie, George E. Biddulph, Pere Masqué, Hilary Kennedy, Jimena Samper-Villarreal, J. Patrick Megonigal, Vanessa Hatje, Jana Friedrich, Sigit D. Sasmito, Kenta Watanabe, Inés Mazarrasa, Dorte Krause-Jensen, Janine Adams, Miguel Cifuentes-Jara, Ariane Arias-Ortiz, Andre S Rovai, Milica Stankovic, Kirsten Isensee, Ana M. Queirós, Luzhen Chen, Jorge A. Herrera-Silveira, Catriona L. Hurd, Ken W. Krauss, Anna Lafratta, Maria Palacios, María Palacios, William Austin, Hannah K. Morrissette, Tania E. Romero-Gonzalez, Rashid Ismail
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Nature
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Can Environmental Markets Pay for More Sustainable Farm Dams? A Cost–Benefit Analysis
1 Introduction Agriculture is one of the most water-intensive sectors and currently consumes nearly 70% of global freshwater resources (Aivazidou et al. 2016; Lobell and Burke 2009; Malek et al. 2018; UN Water 2009). Meeting this demand under a changing climate increasingly relies on artificial waterbodies such as farm dams, which are small structures (typically 102–105 m2) constructed across rural landscapes to store water for livestock and irrigation (Dobes et al. 2021; Malerba et al. 2021).
Additionality requirements of carbon markets could penalize Indigenous stewardship - Nature Climate Change
Despite strong evidence that Indigenous stewardship sustains biodiversity and carbon stocks, carbon markets typically reward recovery from degradation rather than protection, often excluding Indigenous-managed lands. Rethinking additionality could align climate mitigation with care, equity and long-term ecosystem stewardship.
Barriers and Enablers to Blue Carbon Projects in Africa: A Horizon Scan Analysis
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Mangrove sediment carbon burial offset by methane emissions from mangrove tree stems - Nature Geoscience
Abstract Mangroves are recognized globally as important blue carbon ecosystems for mitigating climate change due to their remarkable carbon sequestration potential. However, methane emissions from these ecosystems can partially offset their net carbon burial capacity. Although methane oxidation within soils can minimize these emissions, the contribution of methane released directly through mangrove tree stems remains underexplored.
A critical analysis of marine carbon sequestration opportunities in South Korea
Citation: Macreadie PI, Ross FWR, Duarte CM, Won Hong J, Yoon H-S (2025) A critical analysis of marine carbon sequestration opportunities in South Korea. PLOS Clim 4(5): e0000591. https://doi.org/10.1371/journal.pclm.0000591 Editor: Liqiang Xu, Hefei University of Technology, CHINA Published: May 5, 2025 Copyright: © 2025 Macreadie et al.
Author Correction: Carbon burial in sediments below seaweed farms matches that of Blue Carbon habitats - Nature Climate Change
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Correction to: Nature Climate Change https://doi.org/10.1038/s41558-024-02238-1, published online 17 January 2025. In the version of the article initially published, there were errors in the affiliations which have now been amended in the HTML and PDF versions of the article so that Simon Davis and Al-Jeria Abdul are affiliated with Seadling, Kota Kinabalu, Sabah, Malaysia and Noumie Surugau is affiliated with Seaweed Research Unit, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia.
By Carlos Duarte, Antonio Delgado-Huertas, Elisa Martí, Tomohiro Kuwae, Masakazu Hori, Toshihiro Miyajima, Nichole Price, Aurora M. Ricart, Noumie Surugau, Xi Xiao, Ik Kyo Chung, Hatim Albasri, Dorte Krause-Jensen, Annette Bruhn, Teis Boderskov, Kasper Hancke, Ana R. Borrero-Santiago, Fred Pascal, Lanto Ranivoarivelo, Ricardo Riquelme, Marcela Avila, Peter Macreadie
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Nature
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Trends in Market‐Based Blue Carbon Projects
1 Introduction The recognition of blue carbon (BC) ecosystems (primarily mangroves, seagrasses and tidal marshes) (Lovelock and Duarte 2019) as an effective natural climate solution (Macreadie et al. 2021) paved the way for their inclusion within carbon markets. BC ecosystems are efficient at capturing and storing carbon, in their soils and plant biomass, often surpassing terrestrial ecosystems (McLeod et al. 2011).
Climate Effects on Belowground Tea Litter Decomposition Depend on Ecosystem and Organic Matter Types in Global Wetlands
Environmental Science & Technology Cite this: Environ. Sci. Technol. 2024, XXXX, XXX Click to copy citationCitation copied! . This publication is licensed under CC-BY-NC-ND 4.0 . You are free to share (copy and redistribute) this article in any medium or format within the parameters below: Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. Non-Commercial (NC): Only non-commercial uses of the work are permitted.
Climate Effects on Belowground Tea Litter Decomposition Depend on Ecosystem and Organic Matter Types in Global Wetlands
Environmental Science & Technology Cite this: Environ. Sci. Technol. 2024, XXXX, XXX Click to copy citationCitation copied! . This publication is licensed under CC-BY-NC-ND 4.0 . You are free to share (copy and redistribute) this article in any medium or format within the parameters below: Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. Non-Commercial (NC): Only non-commercial uses of the work are permitted.
Global Change Biology | Environmental Change Journal | Wiley Online Library
1 INTRODUCTION Carbon dioxide (CO2) draw down from the atmosphere into the coastal and shallow ocean can provide a substrate for photosynthesis-driven production of organic tissues (sequestration) and their subsequent burial into marine sediments (Barbier et al., 2011; Nellemann et al., 2009).
Plastic Paradox in Blue Carbon Ecosystems
Download Hi-Res ImageDownload to MS-PowerPointCite This:Environ. Sci. Technol. 2024, XXXX, XXX This article has not yet been cited by other publications.
Plastic Paradox in Blue Carbon Ecosystems
Download Hi-Res ImageDownload to MS-PowerPointCite This:Environ. Sci. Technol. 2024, XXXX, XXX This article has not yet been cited by other publications.
Rocio Araya‐Lopez's research works
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Trends in the application of remote sensing in blue carbon science
12 of 13 | ARAYA-LOPEZ et al.
Trends in the application of remote sensing in blue carbon science
1 INTRODUCTION In recent years, natural climate solutions have become an emerging option to mitigate and adapt to climate change impacts (Griscom et al., 2017). Natural climate solutions focus on ecosystem management approaches (e.g., conservation, restoration, and reforestation) to enhance carbon sequestration and reduce greenhouse gas emissions.
Our unsung farm dams provide vital habitat to threatened species of frogs Original
Frogs are in trouble. While many of the world’s animal species are now at risk from habitat loss, climate change and other human pressures, frogs are particularly at risk. That’s because they rely on fresh water – and rivers, creeks and lakes are especially vulnerable to threats and habitat loss. Freshwater creatures are going extinct faster than land or sea-based lifeforms.
Multi-scale mapping of Australia’s terrestrial and blue carbon stocks and their continental and bioregional drivers - Communications Earth & Environment
Using an environmental correlation methodology, we harmonised and modelled the SOC stocks in terrestrial and BCE. The approach uses climatic, edaphic, biotic, multi-scale terrain, and oceanographic variables. Our research builds on that of ref. 38 by supplementing the dataset with samples from native forests and BCE and further developing the modelling.
A global horizon scan of issues impacting marine and coastal biodiversity conservation - Nature Ecology & Evolution
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Abstract The biodiversity of marine and coastal habitats is experiencing unprecedented change. While there are well-known drivers of these changes, such as overexploitation, climate change and pollution, there are also relatively unknown emerging issues that are poorly understood or recognized that have potentially positive or negative impacts on marine and coastal ecosystems.
By James E. Herbert-Read, Ann Thornton, Diva Amon, Isabelle Côté, Maria P. Dias, Sally Keith, Emma McKinley, Lloyd S. Peck, Omar Defeo, Emma Johnston, Peter Macreadie, Anna Metaxas, David Obura, Alberto R. Piola, Anthony Richardson, Paul Thompson, Gordon Watson, Thomas Worthington, Steven Degraer, Irene R. Schloss
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Nature
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Plastics in blue carbon ecosystems: a call for global cooperation on climate change goals
Blue carbon ecosystems (BCEs; figure), comprising tidal marshes, mangrove forests, and seagrass meadows, contribute more than 50% of the total organic carbon buried in global marine sediments, despite occupying only 0·5% of the sea floor. 1 Duarte CM Losada IJ Hendriks IE Mazarrasa I Marbà N The role of coastal plant communities for climate change mitigation and adaptation. Nat Clim Chang.
Spatial and temporal variability of green turtle and dugong herbivory in seagrass meadows of the southern Great Barrier Reef (GBR)
NOTE Spatial and temporal variability of green turtle and dugong herbivory in seagrass meadows of the southern Great Barrier Reef (GBR) Abigail L. Scott1,2,*, Paul H. York1, Peter I. Macreadie3, Michael A.
Macroalgal Blooms Trigger the Breakdown of Seagrass Blue Carbon
Intensive macroalgal blooms, a source of labile organic carbon (LOC) induced by coastal nutrient loading in some seagrass ecosystems, create ideal conditions for enhanced recalcitrant organic carbon (ROC) loss via the cometabolism effect. Here, we carried out a 62-day laboratory experiment to see if density-dependent addition of macroalgal biomass can influence the seagrass decomposition process, including seagrass detritus carbon chemistry, greenhouse emissions, and bacterial communities.
The Value of Australia’s Coastline
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The Value of Australia’s Coastline Simon Reeves, Chris Gillies, And James Fitzsimons Australia And Paul Carnell, Alejandro Navarro, Holger Jänes, Ashley Whitt, Mary Young, Peter Macreadie, Emily Nicholson And Dan Ierodiaconou 2020-02-29 02:20:50 New technology reveals the value of the coast like never before Flight mission loaded, check. Winds under 15 knots, check. No pedestrians or airplanes in the area, check. Camera on, check.” “Arming!” yells the pilot, as, the buzzing of rotors fills the air.
By Simon Reeves, James Fitzsimons Australia, Paul E. Carnell, Alejandro Navarro Verified, Holger Jänes, Ashley Whitt Verified, Mary Young, Peter Macreadie, Emily Nicholson, Dan Ierodiaconou
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ECO Magazine
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Correction to ‘Blue Carbon stocks of Great Barrier Reef deep-water seagrasses’
Biol. Lett.12, 20180529. (Published online 12 December 2018) (doi:10.1098/rsbl.2018.0529) In our original paper [1], an error occurred in the calculations of organic carbon values in sediment cores resulting in the reporting of values one order of magnitude less than the actual values. Below we amend incorrect references to the organic carbon values in the text and on the y-axis for figure 2d. Figure 2d.
Australian vegetated coastal ecosystems as global hotspots for climate change mitigation
Abstract Policies aiming to preserve vegetated coastal ecosystems (VCE; tidal marshes, mangroves and seagrasses) to mitigate greenhouse gas emissions require national assessments of blue carbon resources. Here, we present organic carbon (C) storage in VCE across Australian climate regions and estimate potential annual CO2 emission benefits of VCE conservation and restoration.
The future of Blue Carbon science
Abstract The term Blue Carbon (BC) was first coined a decade ago to describe the disproportionately large contribution of coastal vegetated ecosystems to global carbon sequestration. The role of BC in climate change mitigation and adaptation has now reached international prominence. To help prioritise future research, we assembled leading experts in the field to agree upon the top-ten pending questions in BC science.
Optimal soil carbon sampling designs to achieve cost-effectiveness: a case study in blue carbon ecosystems
Blue carbon: Optimal soil carbon sampling designs to achieve cost-effectiveness: a case study in blue carbon ecosystems Mary A. Young, Peter I. Macreadie, Clare Duncan, Paul E. Carnell, Emily Nicholson, Oscar Serrano, Carlos M. Duarte, Glenn Shiell, Jeff Baldock, Daniel Ierodiaconou Biol. Lett. 2018 14 20180416; DOI: 10.1098/rsbl.2018.0416. Published 26 September 2018
A multi-criteria decision approach to decommissioning of offshore oil and gas infrastructure
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Tackling unethical authorship deals on scientific publications
The research excellence of academics is often measured by the quantity and quality of their scholarly publications. But how do we know that all authors listed on a publication have actually been involved in the research? Is our “publish or perish” culture encouraging the development of unethical, fraudulent co-authorship deals? The number of authors on scientific papers has been growing. In 2011, the average number of authors on a paper stood at 4.5, up from 3.8 in 2007.
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