Harnessing green tide Ulva biomass for carbon dioxide sequestration

Reviews in Environmental Science and Bio/Technology, Год журнала: 2024, Номер unknown

Опубликована: Сен. 2, 2024

Green tides, characterised by massive blooms of the seaweed Ulva, pose a significant threat to coastal economies and marine ecosystems. This review explores potential repurposing harmful Ulva for carbon sequestration, addressing critical global issue CO2 emission. We conducted comprehensive literature examined conversion shoreline biomass into biochar through pyrolysis, process that can be implemented directly at biorefineries. approach not only facilitates sequestration but also mitigates greenhouse gas emissions enhances soil quality amendments. Our covers data from 2008 2022, focusing on during green tide episodes in China Korea. assessment indicates has sequester approximately 3.85 million tons equivalent (CO2e), with about 1.93 CO2e potentially stabilised conversion. Furthermore, we hypothetical techno-economic analysis assessing sustainability economic viability cultivation production sequestration. These findings suggest combined could financially viable profitable. Despite challenges posed our highlights their role mitigating climate change.

Язык: Английский

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The Impact of Beach Wrack on Greenhouse Gas Emissions from Coastal Soils

Climate, Год журнала: 2025, Номер 13(5), С. 91 - 91

Опубликована: Апрель 30, 2025

The existing management strategies of macrophyte beach wrack are not always environmentally sound. In this study, we tried to assess the impact presence or absence on CO2 flux and possibility creating an sound recycling based their removal from processing into biochar. study was conducted coast Sea Japan in bay Kievka. Picarro G4301 portable laser gas analyzer used measure fluxes areas with without wrack. 23 times higher at plots wrack, compared after manual average, there a 1.6-fold decrease flow values Considering frequency emissions area, which is associated frequent cyclones storms, it possible organize systematic cleaning for production Creating projects conversion biochar can have both environmental economic benefits. benefits include reduction wrack; long-term storage carbon biomass form biochar; soils (carbon sequestration) correct technology introducing soil. However, more accurate assessment, monitoring seasonal measurements calculations entire technological chain production, risks, footprint necessary.

Язык: Английский

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A Comparison of Multiple Macroalgae Cultivation Systems and End-Use Strategies of Saccharina latissima and Gracilaria tikvahiae Based on Techno-Economic Analysis and Life Cycle Assessment

Sustainability, Год журнала: 2023, Номер 15(15), С. 12072 - 12072

Опубликована: Авг. 7, 2023

Macroalgae can be processed into various products with the potential to substitute land-based crops; their cultivation bioextract nutrients from coastal waters. This study investigated economic cost and environmental impacts of multiple seaweed platforms, strategies, processing/end-use strategies through techno-economic analysis (TEA) life cycle assessment (LCA) a focus on Saccharina latissima Gracilaria tikvahiae. Cultivation platforms included single-layer longline, dual-layer strip, strip systems. Processing/end-use biofuel, dried sea vegetables, marketable commercial fertilizer, animal feed. Economic costs decreased were highest using common longline system ($4.44 kg−1 dry weight (dw) S. $6.73 dw G. tikvahiae when cultivated rotation). The use reduced $2.19 for $3.43 Seaweed drying was major contributor macroalgae processing. Yet, all scenarios achieved benefits marine eutrophication. best performance observed biomass assuming offset vegetable production, or used as biofeedstock anaerobic digestion combined heat power.

Язык: Английский

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Macroalgal eukaryotic microbiome composition indicates novel phylogenetic diversity and broad host spectrum of oomycete pathogens

Environmental Microbiology, Год журнала: 2024, Номер 26(6)

Опубликована: Май 31, 2024

Abstract Seaweeds are important components of marine ecosystems with emerging potential in aquaculture and as sources biofuel, food products pharmacological compounds. However, an increasingly recognised threat to natural industrial seaweed populations is infection parasitic single‐celled eukaryotes from the relatively understudied oomycete lineage. Here we examine eukaryomes diverse brown, red green macroalgae collected polar (Baffin Island), cold‐temperate (Falkland Islands) tropical (Ascension Island) locations, a focus on closely related diatom taxa. Using 18S rRNA gene amplicon sequencing, show unexpected genetic taxonomic diversity eukaryomes, strong broad‐brush association between eukaryome composition geographic location, some evidence structure macroalgal phylogenetic relationships (phylosymbiosis). fraction showed disparate patterns structure, highlighting much weaker geography no phylosymbiosis. We present several novel haplotypes most common Eurychasma dicksonii report for first time cosmopolitan distribution absence host specificity this pathogen. This indicates rich pathogens highlights that these may be generalist highly adaptable environmental conditions.

Язык: Английский

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A comprehensive index for assessing the sustainable blue economy: A Japanese application

Ocean & Coastal Management, Год журнала: 2024, Номер 258, С. 107401 - 107401

Опубликована: Окт. 4, 2024

Язык: Английский

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Global ocean spatial suitability for macroalgae offshore cultivation and sinking

Frontiers in Marine Science, Год журнала: 2023, Номер 10

Опубликована: Ноя. 30, 2023

Macroalgae offshore cultivation and sinking is considered a potentially practical approach for ocean-based carbon dioxide removal. However, several considerations need to be resolved assess the effectiveness sustainability of this approach. Currently, studies focus on area required climate-relevant sequestration through macroalgae without considering realistic, global spatial limitations. This study uses spatially-explicit suitability assessment model optimised open-ocean afforestation site designation. By applying specific maritime, ecological industrial constraints, two maps are produced: a) suitable areas sinking, b) only (for purposes). These data provide more realistic quantifying ocean surface (including corresponding depths) within spatially sustainable framework. The resulting estimate respective EEZs world countries. A total calculated at 10.8M km 2 , whereas sinking-only account 32.8M ocean. implications patterns national levels discussed. We suggest that concept ‘g row nearshore, sink offshore’ should explored as an alternative cultivation.

Язык: Английский

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Supporting ecosystem services of habitat and biodiversity in temperate seaweed (Saccharina spp.) farms

Marine Environmental Research, Год журнала: 2023, Номер 191, С. 106162 - 106162

Опубликована: Сен. 11, 2023

Язык: Английский

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Carbon and Nitrogen Deposits of Macroalgal Origin on a Tropical Seagrass Meadow

Ecosystem Health and Sustainability, Год журнала: 2024, Номер 10

Опубликована: Янв. 1, 2024

How would the biodiversity of macroalgae modify carbon (C) and nitrogen (N) stocks within a blue habitat? We addressed this knowledge gap by quantifying biomass macroalgal origins across seascape seagrass meadow. Such information is warranted due to paucity data on deposits that function as allochthonous inputs into an ecosystem’s pool organic matter. Macroalgae were collected from Merambong shoal (Johor, Malaysia) in December 2020 February 2021. C N analyses performed matter, measurements upscaled represent estimates. Stocks origin meadow estimated at 10.71 ± 1.3 Mg 0.75 0.11 N. The was heterogeneous, which similarly reflected taxa-specific variability up 44.7% 4.9% highest cumulative contributed members Ulvaceae for Corallinaceae Lithophyllaceae among calcifying species. morphology habit 35 species found provided indicators their autochthonous versus nature based benthic or drifting tendencies. Predictors factored indices not evident, although Evenness index partially explained it spatial level. model still able pinpoint clusters hotspots meadow, allowing management measures protection reserves while mitigating release excess

Язык: Английский

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Pacifying seaweed: imagining docile objects for novel blue bioeconomies

MAST. Maritime studies/Maritime studies, Год журнала: 2024, Номер 23(3)

Опубликована: Июль 23, 2024

Язык: Английский

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Carbon dioxide removal (CDR) potential in temperate macroalgal forests: A comparative study of chemical and biological net ecosystem production (NEP)

Marine Pollution Bulletin, Год журнала: 2024, Номер 210, С. 117327 - 117327

Опубликована: Ноя. 25, 2024

Язык: Английский

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