Vol.
No.
2, 2025, 100-109.
Homepage: https://ejurnal.
id/jbd Assessing the Global Cultivation Practices of Kappaphycus alvarezii: A Comprehensive Review of Growth Dynamics.
Nutrient Management, and Biochemical Composition Sri Mulyani Bosowa University Email correspondence*: sri.
mulyani@universitasbosowa.
ABSTRACT
Kappaphycus alvarezii is a crucial species for carrageenan production, widely used in various industries.
This review aims to synthesize global research on the cultivation of K.
alvarezii, focusing on growth dynamics, nutrient management, and biochemical composition.
Studies show that growth rates are significantly influenced by cultivation methods, such as longline, raft farming, and Integrated Multi-Trophic Aquaculture (IMTA), each offering distinct advantages in terms of yield and ecological sustainability.
Nutrient management, particularly nitrogen and phosphorus level, plays a critical role in optimizing both biomass and carrageenan quality.
The use of biostimulants and fertilizers has been found to enhance growth and biochemical properties, yet careful nutrient control is essential to prevent negative environmental impacts such as eutrophication.
Genetic diversity, particularly through the selection of wild versus cultivated strains, is another important factor in farm resilience.
Wild strains provide greater environmental adaptability and disease resistance, while selected strains typically offer faster growth and higher yields.
However, the reduced genetic diversity in clonal farming raises concerns about long-term sustainability.
Research gaps identified include the need for long-term studies on the sustainability of farming techniques, particularly in the context of climate change, and more extensive investigations into the ecological and economic benefits of IMTA systems.
Future research should focus on integrating biological, ecological, and economic aspects to optimize K.
alvarezii farming and enhance its contribution to the blue economy.
Keywords: biochemical composition.
carrageenan quality.
growth dynamics.
Kappaphycus alvarezii.
INTRODUCTION
Kappaphycus alvarezii is one of the most commercially significant species of red algae, primarily cultivated for carrageenan production.
This hydrocolloid is widely used in the food, pharmaceutical, and cosmetic industries due to its gelling, thickening, and stabilizing properties.
Carrageenan derived from K.
alvarezii is particularly valuable because it is cost-effective and can be produced using relatively simple farming techniques, which has led to its widespread adoption, especially in tropical coastal regions (Tan et al.
, 2021.
Bimasuci et al.
, 2021.
Montyfar-Romero et al.
, 2.
Its cultivation supports a major segment of the global seaweed market, especially in Southeast Asia.
Indonesia, and the Tropical Eastern Pacific, where it contributes significantly to regional economies through both direct revenue from carrageenan and associated industries, such as aquaculture (Zakaria et al.
, 2019.
Shalvina et , 2.
Beyond its industrial applications, alvarezii plays a critical role in supporting livelihoods, particularly in smallholder aquaculture systems.
It is often cultivated using low-capital, short-cycle methods, making it an accessible means for coastal Additionally.
alvarezii cultivation Jurnal Riset Diwa Bahari Vol.
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id/jbd contributes to the blue economy by providing ecosystem services, such as nutrient biofiltration and carbon sequestration, which are increasingly recognized for their potential to mitigate eutrophication and ocean acidification (Nurdin et al.
Heriansah et al.
, 2.
Through its ability to absorb excess nutrients like nitrogen and phosphorus, alvarezii acts as a biofilter, improving local water quality and supporting coastal restoration efforts (Montyfar-Romero et al.
, 2.
However, the expansion of K.
alvarezii farming is not without its Environmental stressors, diseases, and the need for improved seed quality and management practices all present significant barriers to its widespread success (Kumar et al.
, 2020.
Soelistyowati, 2.
These challenges underline the need for continuous research into optimizing cultivation practices to enhance sustainability and farm productivity.
This review synthesizes global research on the cultivation practices of K.
alvarezii, with a particular focus on growth dynamics, nutrient management, and biochemical composition.
The aim is to provide an integrated overview of the current state of knowledge, identify best practices, and highlight gaps in research that need to be addressed to further optimize K.
alvarezii farming for both economic and environmental benefits.
The primary objective of this review is to synthesize global research on K.
alvarezii cultivation, focusing on the following aspects: .
Cultivation Practices and Growth Dynamics: Understanding the various cultivation techniques used worldwide, including raft farming, longline systems, and integrated aquaculture practices, is essential for improving yield and quality.
Growth dynamics, influenced by environmental factors such as light, temperature, salinity, and nutrient levels, are critical to predicting the performance of K.
alvarezii under different farming conditions.
Nutrient Management: Nutrient management plays a crucial role in optimizing growth and biochemical composition, particularly carrageenan yield.
Evaluating the impact of different nutrient inputs, such as nitrogen, phosphorus, and organic additives like biostimulants, on K.
alvarezii will help identify the most efficient and sustainable practices for farming this species.
Biochemical Composition and Carrageenan Yield: The biochemical properties of K.
alvarezii, particularly its carrageenan content, are influenced by genetic factors and environmental This review will examine how different E ISSN: 3032-3177 cultivation practices and environmental variables affect the biochemical composition of the seaweed, with a focus on optimizing carrageenan yield and quality.
Environmental Sustainability and Ecosystem Services: In addition to its economic value.
alvarezii farming provides measurable ecosystem services, including nutrient biofiltration, carbon sequestration, and habitat The review will explore how these services can be optimized through better cultivation practices, contributing to the broader goals of sustainable aquaculture and blue economy initiatives.
This review will focus on studies published in the last two decades, covering key regions involved in K.
alvarezii farming, including Southeast Asia.
India, the Pacific Islands, and Africa.
These regions are central to the global cultivation of K.
alvarezii, and the farming practices in these areas provide valuable insights into the factors that influence productivity and sustainability.
The review will examine multiple cultivation methods, including: .
Raft farming: A common method in shallow coastal waters, where seaweed is grown on floating .
Longline systems: A method used in deeper waters, where seaweed is cultivated on submerged lines.
Integrated aquaculture:
This system combines seaweed farming with fish or shellfish farming to create a more sustainable, multi-trophic approach.
By analyzing these methods, the review will provide a comprehensive understanding of their respective advantages and limitations, and how they contribute to the overall success of K.
alvarezii farming.
To guide the synthesis of the literature, this review will address the following research questions: .
How do global cultivation practices affect the growth dynamics of This question will explore how different farming systems and environmental conditions influence the growth of K.
alvarezii, helping to identify the most effective practices for maximizing yield.
What are the optimal nutrient management strategies for the sustainable cultivation of K.
This question will focus on evaluating the impact of nutrient inputs on the growth and biochemical composition of K.
particularly carrageenan yield.
How do Jurnal Riset Diwa Bahari Vol.
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id/jbd cultivation techniques influence the biochemical properties of K.
alvarezii? This question will examine the relationship between farming methods, environmental factors, and the biochemical composition of K.
alvarezii, with a particular emphasis on carrageenan quality.
What are the environmental benefits of K.
alvarezii farming, and how can these services be optimized for coastal ecosystem restoration and carbon sequestration? This question will explore the ecosystem services provided by K.
alvarezii, such as nutrient biofiltration and carbon sequestration, and how these can be maximized through improved farming practices.
This review will be structured as follows: .
Methods: This section will describe the search strategy, inclusion and exclusion criteria, and the quality assessment tools used to select the studies included in this review.
Theoretical Framework and Background: This section will discuss relevant theories and models related to growth dynamics, nutrient management, and biochemical composition of K.
It will also highlight the contributions of key researchers and ongoing debates in seaweed farming techniques.
Review of Themes/Findings:
This section will organize the literature into four key themes: growth dynamics and cultivation techniques, nutrient management and biochemical composition, environmental impact and sustainability, and strain selection and genetic diversity.
Each theme will synthesize global research findings, identify key factors influencing outcomes, and highlight the advantages and challenges of various practices.
Discussion: This section will provide a critical analysis of the findings, comparing global cultivation practices, nutrient management strategies, and the environmental and biochemical outcomes of different farming systems.
Conclusion: This section will summarize the key findings, identify gaps in current research, and suggest areas for future studies aimed at improving the sustainability, productivity, and resilience of K.
alvarezii farming practices.
By synthesizing global research on these topics, this review aims to provide actionable recommendations for optimizing K.
cultivation, contributing to both economic sustainability and environmental restoration in coastal areas.
II.
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structured search strategy was employed.
The primary database used for the search was Scopus, which is renowned for its extensive peer-reviewed conference papers, and research reports related to marine biology and aquaculture.
The search strategy employed Boolean operators to combine thematic and exact-phrase terms to capture the most relevant studies.
The following key phrases were used in the search:
AuseaweedcultivationAy anda AuK.
alvareziiAy The search terms were optimized to cover a broad spectrum of studies, ranging from environmental and management research.
refine the search, the following thematic terms were included to target studies related to environmental impact, genetic studies, and .
Environmental and stress-related keywords:
Aunitrate,Ay AuDIN,Ay AuTAN,Ay Aubiofiltration,Ay Aunutrient uptake,Ay Autemperature,Ay Ausalinity,Ay Auepiphyte,Ay Auice-ice diseaseAy (Narvarte et al.
Shalvina et al.
, 2022.
Aris, 2.
Genetic studies: Augenetic,Ay AuCOI,Ay Aucox2-3,Ay Au16SAy (Tan et al.
, 2021.
Soelistyowati, 2.
Cultivation method-specific keywords:
Aulong-line,Ay Auraft,Ay Autank,Ay Auremote sensingAy (Rupert et al.
, 2023.
Soelistyowati, 2.
This approach ensured that the search captured a wide range of studies relevant to the global cultivation practices of K.
with particular attention to its growth environmental impact, and genetic diversity.
The search was limited to English-language studies published within the last 20 years to ensure the inclusion of contemporary research.
Figure 1.
The PRISMA flow diagram detailing the screening and selection process of literature METHODS Search Strategy To ensure a comprehensive synthesis of the global research on K.
alvarezii cultivation, a Source: PRISMA design author Jurnal Riset Diwa Bahari Vol.
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id/jbd A flowchart outlining the process of identifying, screening, and selecting relevant studies based on the inclusion and exclusion criteria.
Inclusion and Exclusion Criteria To ensure that only the most relevant and methodologically rigorous studies were included, strict inclusion and exclusion criteria were applied.
The inclusion criteria are as follows:
Study Type: Only peer-reviewed articles, reports, and government publications were included, ensuring a high level of methodological rigor and academic .
Publication Date: Studies published within the last 10 years .
6Ae2.
were considered to focus on the most recent developments in alvarezii cultivation and related practices.
Focus on Cultivation and Biochemical Properties:
Studies needed to directly address cultivation techniques, growth dynamics, nutrient management, and biochemical composition of K.
This focus ensured that the review remained within its scope of optimizing farming practices and addressing sustainability concerns.
The exclusion criteria included: .
NonEnglish Articles: Articles not available in English were excluded due to the linguistic limitations and to maintain consistency in interpretation.
Studies with Limited Methodological Rigor: Articles that lacked sufficient methodological detail, such as sample size, experimental design, or data accuracy, were excluded to ensure that only high-quality studies contributed to the review.
Irrelevant Topics:
Studies not directly addressing K.
alvarezii or its cultivation, as well as those focused on unrelated species or unrelated aquaculture practices, were excluded to maintain the relevance of the review.
This rigorous screening process was followed by a review of the titles, abstracts, and full-text articles to ensure that only the most relevant studies were included in the final selection.
The final selection included 62 studies, which were assessed based on their contribution to the understanding of cultivation practices, growth dynamics, nutrient management, and biochemical composition of K.
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round of screening involved reviewing titles and abstracts to filter out irrelevant A total of 237 studies were retained for detailed review.
Eligibility Check: Following the title and abstract review, full-text articles were assessed for methodological quality and relevance to the review questions.
Studies that did not meet the inclusion criteria were excluded, and only those with sufficient detail on factors, and biochemical composition were .
Final Selection: After fulltext screening, 62 studies were included in the final review.
These studies were rigorously evaluated to ensure that they met the high standards required for systematic reviews, focusing on the various dimensions of K.
alvarezii farming This diagram provides a visual representation of the systematic literature review process, showing the number of ultimately included in the review.
The methods used to select and assess the literature in this systematic review were designed to ensure comprehensive and high-quality coverage of the relevant The rigorous search strategy, combined with clear inclusion and identification of studies that provide meaningful insights into the global practices, challenges, and opportunities in This methodological approach ensures that the review offers a reliable synthesis of the state-of-the-art research, contributing to the development of best practices for optimizing K.
alvarezii farming Screening and Selection Process The screening and selection process i.
RESULTS AND DISCUSSION
followed a step-by-step approach: .
The cultivation of K.
alvarezii is Identification: The initial step involved searching integral to the seaweed industry, relevant databases like Scopus using the particularly for carrageenan production, keywords and inclusion criteria.
This search which supports a wide array of industries.
returned 2396 records.
Screening: The first Jurnal Riset Diwa Bahari Vol.
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id/jbd This review has synthesized findings across multiple themes that explore growth dynamics, nutrient management, biochemical composition, and genetic diversity, all of which contribute to the optimization and sustainability of K.
While significant progress has been made in understanding and improving cultivation practices, several challenges remain, particularly long-term environmental impact, and genetic management.
The key findings across the four themes of this review provide a holistic understanding of the factors that influence the success of K.
alvarezii cultivation.
Growth Dynamics Cultivation Techniques: Studies consistently show that significantly affects the growth rates and productivity of K.
Methods such as raft farming and IMTA systems offer advantages in nutrient cycling, while simpler methods like longline systems are more prone to environmental disturbances (Nurdin et al.
, 2023.
Heriansah et al.
, 2.
The selection of the appropriate cultivation method is thus essential for optimizing yield and minimizing ecological disruption.
Nutrient Management and Biochemical Composition: Nutrient management is pivotal in influencing both the growth of K.
alvarezii and the quality of carrageenan Studies indicate that nitrogen and phosphorus availability, especially in the form of dissolved inorganic nitrogen (DIN), directly influence both biomass production and carrageenan yield (Narvarte et al.
, 2021.
Shalvina et al.
, 2.
Furthermore, the use of biostimulants has shown promise in biochemical properties, suggesting a pathway for improving productivity while reducing environmental stress (Boa Ventura et al.
, 2.
Environmental Impact and Sustainability of Cultivation: The environmental impacts of alvarezii farming are mixed.
On the one
hand, seaweed farming offers significant ecological benefits such as nutrient
E ISSN: 3032-3177
biofiltration and carbon sequestration (Montyfar-Romero et al.
, 2.
the other hand, intensive cultivation methods may contribute to problems such as epiphyte overgrowth, disease (Mulyaningrum et al.
, 2019.
Aris.
Integrated systems like IMTA provide a more sustainable solution, addressing nutrient waste while enhancing overall farm productivity (Narvarte et al.
, 2021.
Heriansah et , 2.
Strain Selection Genetic Diversity: Genetic diversity is crucial for the long-term sustainability of K.
alvarezii farming.
Wild strains, slower-growing, greater resilience to environmental stressors, while selected strains often outperform in terms of growth rates and carrageenan yield (Zakaria et al.
Tan et al.
, 2.
A balanced approach that integrates both wild and cultivated strains is recommended for ensuring sustainable farm operations and reducing vulnerability to disease and environmental stress (Yahya et , 2024.
Dangan-Galon et al.
, 2.
Cultivation practices for K.
vary globally, and their impacts on growth and yield depend on local environmental conditions and farm management The review reveals that while low-input methods like longline systems dominate large-scale production, they often struggle with issues such as disease, epiphyte overgrowth, and poor biomass (Nurdin Mulyaningrum et al.
, 2.
In contrast, controlled systems like raft farming, vertical farming, and IMTA offer better biomass control and higher yields but come with increased capital and management requirements (MontyfarRomero et al.
, 2.
The choice between low-cost, extensive methods and more controlled, intensive systems must be Jurnal Riset Diwa Bahari Vol.
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id/jbd E ISSN: 3032-3177 made based on environmental conditions, exploration, particularly with regard to financial capacity, and the long-term their environmental impact and scalability sustainability goals of the farm.
in large-scale farming systems.
A significant finding across these studies is Carrageenan yield and quality are key the interaction between farming methods and commercial factors influenced by both local environmental conditions.
Cultivation environmental and genetic factors.
The methods such as vertical farming and IMTA are biochemical composition of K.
particularly effective in nutrient-rich or polluted varies according to environmental waters, where they can help reduce conditions, such as nutrient availability eutrophication and improve water quality.
In and temperature, and cultivation practices.
contrast, longline farming, although cost- Studies have shown that nutrient effective, is better suited for calmer, nutrient- enrichment, particularly through nitrogen limited environments but may not provide the and phosphorus management, can enhance same level of ecological service or biosecurity biomass but may negatively affect (Narvarte et al.
, 2021.
Heriansah et al.
, 2.
carrageenan gel strength and molecular These results underscore the need for site- structure (Shalvina et al.
, 2022.
Bimasuci specific approaches when selecting cultivation et al.
, 2.
Genetic diversity also plays a crucial Nutrient management remains a critical role in carrageenan quality.
Selected determinant of the long-term sustainability of K.
strains, while providing higher yields, may alvarezii farming.
Optimal nutrient inputs not produce carrageenan with inferior gel only enhance growth rates but also influence the strength or reduced sulfate content when biochemical properties of the seaweed, such as compared to wild strains (Zakaria et al.
carrageenan yield and quality.
The review 2019.
Tan et al.
, 2.
These findings highlighted the importance of managing nutrient suggest that strain selection, in ratiosAiparticularly nitrogen and phosphorusAi conjunction with optimal environmental since they directly impact both biomass management, is essential for balancing production and the quality of the extracted high yield with high-quality carrageenan carrageenan (Narvarte et al.
, 2021.
Kumar et al.
, production.
The interaction between genotype and environmental conditions The challenge lies in ensuring that nutrient .
enotype y environmen.
must be management practices are both efficient and carefully considered to achieve the desired Integrated systems such as IMTA biochemical properties and ensure that represent a promising approach to nutrient commercial carrageenan production meets management, as they reduce nutrient waste while industry standards.
providing valuable ecosystem services like Based on the findings synthesized in nutrient biofiltration (Narvarte et al.
, 2021.
this review, several recommendations Heriansah et al.
, 2.
However, large-scale emerge for improving the productivity and implementation of IMTA still faces challenges in ecological impact of K.
alvarezii farming.
terms of operational scalability and high initial capital investment.
Further research is needed to a.
Optimize Cultivation Methods: Farms validate the long-term effectiveness of these should adopt cultivation methods that systems in different geographical contexts.
match the environmental conditions of Additionally, biostimulants and organic the region.
While longline methods are fertilizers have shown potential in enhancing effective in calm waters, more growth and improving biochemical outcomes controlled systems such as IMTA and (Boa Ventura et al.
, 2.
However, the vertical farming should be explored in sustainability of these practices requires further nutrient-rich environments to improve Jurnal Riset Diwa Bahari Vol.
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id/jbd Implement Integrated Nutrient Management:
Nutrient inputs should be carefully calibrated to ensure that growth is optimized without compromising the quality of carrageenan or contributing to eutrophication.
IMTA and controlled nutrient systems, such as bioreactors and recirculating aquaculture systems, should be further investigated for long-term environmental benefits.
Enhance Genetic Diversity: Farmers should use a combination of wild and selected strains to ensure genetic resilience and improve The micropropagation and genetic monitoring can help maintain genetic diversity and prevent the negative effects of monoculture farming.
Promote Precision Farming: The integration of remote sensing and precision farming technologies can help optimize farming operations by providing real-time data on environmental parameters, nutrient levels, and crop health.
This will enable more efficient and adaptive management practices.
Despite the progress in understanding K.
alvarezii cultivation, several gaps in research Long-Term.
Multi-Site Genotype Environment Studies: More research is needed to explore the interactions between genotype, environmental conditions, and farming methods across multiple sites to optimize yield and carrageenan quality (Oort et al.
, 2025.
Tan et al.
, 2.
Validation of IMTA Systems: While IMTA systems show great promise for nutrient recycling and ecological benefits, further large-scale validation is needed to confirm their effectiveness and sustainability across different geographical and operational contexts (Heriansah et al.
, 2025.
Narvarte et , 2.
Improvement of Seed Systems and Genetic Monitoring: Research into seed production E ISSN: 3032-3177 techniques, such as micropropagation and land-based seedbeds, is crucial for improving seed quality, reducing disease outbreaks, and enhancing genetic resilience (Latip et al.
, 2025.
Rupert et al.
, 2.
This discussion synthesizes key findings from the four themes, identifies critical points for improving K.
farming practices, and outlines future research directions necessary to ensure the sustainability and productivity of this important aquaculture species IV.
CONCLUSION
This review has synthesized key findings related to K.
alvarezii cultivation, focusing on growth dynamics, nutrient management strategies, and biochemical composition.
The reviewed literature highlights that K.
growth is influenced by several factors, including cultivation methods, nutrient availability, and environmental conditions such as temperature, salinity, and light The choice of cultivation techniqueAiwhether longline, raft farming, or Integrated Multi-Trophic Aquaculture (IMTA)Aihas significant implications for Moreover, management plays a crucial role in optimizing growth and biochemical yield, particularly in improving carrageenan quality.
Biostimulants and fertilizers have been identified as effective tools for enhancing growth and quality, though the risks of nutrient imbalance and eutrophication remain.
The genetic diversity of K.
strains also emerged as a key factor influencing long-term farm sustainability.
Wild strains provide greater resilience to environmental stressors and diseases, while selected strains yield higher biomass and carrageenan yield.
However, the reduction in genetic diversity associated with clonal propagation poses risks for long-term farm This review identified several research gaps, particularly the need for long-term, multi-site studies to explore genotypeenvironment interactions and their impact on Jurnal Riset Diwa Bahari Vol.
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id/jbd growth, yield, and carrageenan quality.
Furthermore, the potential of IMTA systems for sustainable farming warrants further investigation to assess their scalability and environmental benefits.
Future research should focus on integrated studies that combine biological, ecological, and economic aspects of seaweed farming.
Developing precision aquaculture models, incorporating genetic monitoring, and advancing seed systems will be essential to optimize K.
alvarezii farming practices and ensure its sustainability.
REFERENCES