Introduction

Mangroves are among the world’s most productive and ecologically significant ecosystems. These salt-tolerant trees and shrubs occupy intertidal zones of tropical and subtropical coastlines, where they provide a wide array of ecological and economic services despite covering only about 0.1% of Earth’s land area (1, 2). Their structurally complex habitats support exceptionally high biodiversity and function as critical interfaces between terrestrial and marine environments. By linking these systems, mangrove forests facilitate species movement, nutrient exchange, and energy flow, thereby contributing substantially to coastal ecological integrity and human well-being (3, 4).

Ecologically, mangroves regulate climate by acting as nursery habitats for aquatic fauna, stabilizing coastlines, buffering storm surges, and storing large quantities of atmospheric carbon (5, 6). Economically, they provide cost-effective natural protection from coastal hazards while supporting fisheries, timber and non-timber forest products, and a variety of nature-based livelihoods. Despite these benefits, mangroves are under increasing pressure from multiple anthropogenic and climatic drivers. However, these threats vary significantly across regions: shrimp aquaculture and land conversion dominate losses in Southeast Asia, coastal infrastructure expansion is a primary driver in South Asia and West Africa, while accelerated subsidence and sea-level rise disproportionately affect small island nations and deltaic regions (9, 3). Understanding these spatial and thematic variations is essential for effective conservation.

Although mangrove ecosystems have been widely studied, current research reveals important knowledge gaps. Existing literature is often regionally biased, with heavy concentration in Southeast Asia, creating limited global comparability. Considerable uncertainty persists regarding key ecological processes such as the magnitude of detrital outwelling, regional differences in carbon stock estimates, and variation in restoration success under different hydrological conditions. Similarly, economic assessments lack standard valuation frameworks, limiting their integration into policy instruments such as carbon markets, coastal planning, and payment-for-ecosystem-services programs.

Given these gaps, this review aims to provide a comprehensive, integrative synthesis of the ecological functions and socio-economic significance of mangroves at a global scale. Specifically, it aims to: 1) Compare ecological processes across different biogeographic regions, highlighting convergences and divergences. 2) Critically evaluate contrasting evidence-particularly in areas such as carbon dynamics, outwelling, and hydrological resilience. 3) Synthesize economic valuations of mangrove services, including fisheries, NTFPs, ecotourism, carbon credits, and emerging biotechnological applications. 4) Identify research gaps and policy challenges relevant to conservation, restoration, and climate adaptation.

By addressing these objectives, this review moves beyond descriptive accounts to provide a structured, evidence-based evaluation of mangrove ecosystem services, emphasizing their importance for long-term environmental stability, coastal resilience, and sustainable community livelihoods.

Methodology

A comprehensive literature search was conducted between January and July 2024 across Web of Science, Scopus, ScienceDirect, Google Scholar, SpringerLink, and institutional repositories such as FAO, UNEP and IUCN, using combinations of keywords including “mangroves,” “ecological functions,” “blue carbon,” “nursery habitats,” “coastal protection,” “economic valuation,” “NTFPs,” “ecotourism,” and “aquaculture impacts.” The search covered studies published between 1990 and 2024. Articles were included if they examined ecological or economic aspects of mangrove ecosystems, presented original data or validated analyses, described clear methodology, and were available in English, whereas anecdotal reports, non-reviewed sources, conference abstracts without full text, and studies focused solely on unrelated wetland types were excluded. A total of 312 records were identified, 72 duplicates were removed, and 230 full texts were screened; ultimately, 135 studies fulfilled all inclusion criteria. Extracted data were synthesized thematically and classified into ecological and economic domains. Blue Carbon frameworks to ensure structural consistency. The methodology also explicitly acknowledges publication bias (positive results being overrepresented), regional citation bias heavily favouring Southeast Asia, and methodological differences across studies (e.g., field plots vs. remote sensing) that influence comparability. A PRISMA-style flow diagram documenting identification, screening, eligibility assessment, and inclusion steps was prepared for transparency (10), as shown in Figure 1.

Ecological Significance

Mangrove ecosystems provide a wide array of essential ecological services that underpin biodiversity, protect coastlines, regulate water quality, and store significant quantities of carbon. Their unique structural adaptations such as aerial roots, pneumatophores, prop roots, dense canopies, and high sediment-trapping capacity create complex, layered habitats that support diverse terrestrial, estuarine, and marine communities. As biodiversity hotspots, mangroves offer critical breeding, feeding, and nursery grounds for fish, crustaceans, birds, and other wildlife.

Globally, mangroves are regarded as some of the most ecologically valuable habitats, functioning as natural buffers that absorb wave energy, reduce storm impacts, and prevent shoreline erosion. They also enhance water quality by trapping sediments, immobilizing heavy metals, and filtering pollutants before these reach open waters. Importantly, mangroves serve as highly efficient carbon sinks, storing large amounts of organic carbon in both biomass and sediments, thereby contributing significantly to global climate regulation, as shown in Figures 2 and 3.

["Figure", "https://etflin.com/file/figure/20251222032029607460391.png", "Figure 1. PRISMA flow diagram outlining the identification, screening, eligibility assessment, and inclusion of studies in this review.", "", "78%", "1"]

["Figure", "https://etflin.com/file/figure/202512220321371252957400.png", "Figure 2. Diagram showing ecological significance of Mangroves.", "", "100%", "2"]

Biodiversity Conservation

Mangrove forests function as vital biodiversity hotspots in tropical and subtropical coastal regions, supporting remarkable terrestrial and aquatic species diversity through their unique structural complexity. Features such as dense prop roots, pneumatophores, and stratified canopies create multiple microhabitats that sustain rich and interconnected ecological communities (3, 4, 11). One of the most critical ecological functions of mangroves is their role as breeding, nursery, and rearing grounds for a wide range of marine organisms of both ecological and economic importance (3, 4, 11). Juvenile stages of numerous fishes, shrimps, crabs, and mollusks depend on the protective structure of mangrove roots for shelter, predator avoidance, and foraging, significantly increasing their chances of survival (12, 13). Empirical studies indicate that nearly 75% of commercially harvested tropical fish species utilize mangrove habitats during some phase of their life cycle, highlighting their indispensable contribution to coastal fisheries productivity (14, 15).

The structural complexity of mangrove habitats also supports high shrimp productivity (16), including species of major commercial value such as tiger prawns (Penaeus monodon) and sea crabs (Scylla paramamosain), as well as brackish-water fishes like barramundi (Lates calcarifer) and Nile tilapia (Oreochromis niloticus) (17).

Mangroves provide essential habitats for a wide array of resident and migratory bird species including herons, egrets, kingfishers, storks, sea eagles, and ospreys serving as nesting, roosting, and stopover sites along major coastal flyways (18-20). Across biogeographical regions, between 150 and 250 bird species have been documented within mangrove landscapes (21).

Beyond avifauna, mangroves sustain a diverse assemblage of mammals (e.g., proboscis monkeys Nasalis larvatus, fishing cats Prionailurus viverrinus), reptiles (including crocodiles and snakes), and invertebrates such as fiddler crabs and mangrove tree crabs that play crucial roles in nutrient cycling (22, 23). Southeast Asia, recognized as the global epicentre of mangrove biodiversity, exhibits["Figure", "https://etflin.com/file/figure/202512220322171118801446.jpg", "Figure 3. Different ecological role of Mangroves.", "", "100%", "2"]particularly high species richness and endemism (4). For example, Malaysia’s approximately 9,000 hectares of mangrove forests support extensive marine and estuarine life, including seagrasses (Gracilaria spp.), algae, fungi, and diverse fish communities, with species distributions influenced by tidal dynamics and seasonal salinity patterns (24). These ecosystems also enhance ecotourism potential, notably illustrated by the famous firefly (Photuris lucicrescens) congregations along the Kampung Kuantan riverbanks in Malaysia (25). Toward temperate intertidal zones, mangroves continue to support burrowing species such as clams, mussels, fiddler crabs, and polychaetes (17).

Coastal Protection & Stabilization

Mangroves function as highly effective natural coastal defence systems through a combination of hydrodynamic and geomorphological mechanisms. Their dense vegetation and complex root architectures exhibit strong wave-attenuation capacity, reducing wave energy by 13–90% over a 100-meter mangrove belt (26-28) and lowering storm-surge heights by approximately 5–50 cm per kilometre of forest width (29). These protective benefits were clearly demonstrated during Hurricane Wilma (2005), when mangroves in Florida reduced inland flooding by nearly 70% (30), and following the 2004 Indian Ocean tsunami, during which mangrove belts absorbed up to 70% of incoming wave energy (31, 32).

Beyond wave reduction, mangrove root systems significantly enhance shoreline stability by trapping sediments and facilitating vertical accretion. They can retain up to 80% of incoming sediments (33) and contribute to long-term elevation gain through sediment accumulation processes (34, 35). These functions are particularly critical in erosion-prone zones such as Vietnam and Malaysia, where coastal erosion can reach 50 m/year and currently affects nearly 30% of shoreline segments (28, 36).

In addition to physical protection, mangroves provide economically viable alternatives to engineered coastal barriers. For instance, Philippine mangroves offer an estimated USD 1.6 billion in annual storm-damage prevention (6, 36). Their proven cost-effectiveness, coupled with demonstrated performance during extreme climatic events (37), underscores the value of mangrove conservation as a nature-based solution for enhancing coastal resilience an increasingly urgent need as climate change drives higher storm frequency and intensity (38).

Water Quality and Nutrient Cycling

Mangrove ecosystems play a crucial role in maintaining coastal water quality through their ability to trap pollutants, retain excess nutrients such as nitrogen and phosphorus, and capture suspended solids from agricultural and urban runoff. Their intricate root structures and sediment-binding capacity significantly reduce turbidity and prevent eutrophication in adjacent ecosystems, thereby protecting sensitive habitats such as seagrass beds and coral reefs from sedimentation and nutrient overload (39, 8). By stabilizing sediments and minimizing water cloudiness, mangroves enhance seagrass growth parameters including shoot density, root length, and overall biomass while supporting the health of nearby coral reef systems.

Mangroves also contribute substantially to regional biogeochemical cycles and function as integral nodes in the tropical coastal blue carbon network. These ecosystems store large amounts of organic carbon in both biomass and sediments, reinforcing the need for integrated conservation approaches across interconnected mangrove–seagrass–coral reef systems (41, 42, 44, 45).

The long-standing hypothesis that mangrove-derived detritus supports offshore productivity has been revisited in recent years. While traditional models emphasize strong detrital “outwelling,” new mass-balance and tracer studies suggest that export may be less extensive than previously assumed. Dissolved organic matter appears to play a more significant role than particulate detritus in fueling adjacent food webs, and benthic communities show variable dependence on mangrove-derived detrital inputs (46).

Microbial processes within mangrove soils further enhance nutrient cycling. Microbial communities facilitate nitrogen fixation, denitrification, and organic matter decomposition, thereby increasing nutrient bioavailability, supporting plant growth, and suppressing pathogenic bacteria ultimately promoting higher biodiversity across the ecosystem (47). Through these mechanisms, mangroves function as effective nutrient processors, recycling excess terrestrial inputs and preventing nutrient accumulation that could otherwise trigger harmful algal blooms (48). Detritus from leaf litter and organic debris forms the foundation of complex food webs within and around mangrove ecosystems (49).

Importantly, mangrove sediments act as sinks for heavy metals and organic contaminants through adsorption and plant uptake, providing a natural buffer against anthropogenic pollution (50). This function is especially vital in regions exposed to intense agricultural runoff, aquaculture effluents, and urban wastewater discharge, where mangroves mitigate ecological degradation and help maintain coastal water quality.

Carbon Stores

Mangrove forests span 105 countries, with Indonesia, Brazil, Malaysia, and Papua New Guinea together holding nearly half of the global mangrove area. These ecosystems are among the most carbon-dense in the tropics, storing substantially larger quantities of carbon per unit area than most terrestrial forests, making them indispensable for climate-change mitigation (51). Studies across Southeast Asia particularly from Indonesia consistently report some of the highest carbon stocks worldwide, with values commonly ranging between 863–1073 Mg C ha⁻¹ in mature stands supported by large trees and deep organic sediments (52).

A broader synthesis reveals a coherent pattern: structurally complex, undisturbed mangroves function as powerful long-term carbon sinks, with annual sequestration rates often exceeding those of many tropical terrestrial forests and capturing more than 2 tons of carbon per hectare per year (53, 66). Quantifying these pools remains critical for evaluating mangrove contributions to global ecosystem services (7). More than 80% of this carbon typically resides below ground, stored in sediments and dense root systems (21, 7, 54). Soil carbon accumulation driven by litterfall, woody debris, and slow decomposition is strongly modulated by forest structure (tree height, basal area) and hydrological conditions such as salinity and dissolved oxygen (54, 7).

Although intact mangroves act as efficient, long-term carbon sinks, their degradation rapidly reverses this role. Disturbance exposes deep anoxic sediments to oxygen, accelerating decomposition and releasing substantial CO₂; for instance, conversion of mangroves to pasture generates emissions far higher than equivalent deforestation in the Amazon (55). Nevertheless, remaining intact mangroves still offset the majority of emissions from global mangrove loss up to 94% (55).

Global assessments estimate that mangroves collectively store approximately 21,896.56 Mt CO₂-equivalent, with 2,817.23 Mt contained in above-ground biomass and 19,079.32 Mt within the top 1 m of soil (59, 60). National inventories indicate that Indonesia holds the highest stock (61). Soil carbon typically extends 0.5–3 m deep, accounting for 49–98% of total ecosystem carbon (62).

Importantly, differences in reported values across studies often reflect contrasting methodological approaches. Local case studies such as plot-based measurements from Indonesia use direct biomass sampling and sediment coring, providing fine-scale, high-resolution estimates but limited spatial coverage. In contrast, global carbon stock assessments rely heavily on remote sensing, upscaled biomass models, and harmonised datasets, which capture large-scale patterns but may smooth out local heterogeneity. Recognising these methodological differences helps reconcile apparent variation in reported values and underscores the need for integrative approaches combining field data with remote-sensing products to improve regional and global carbon accounting.

Economic Significance

Mangroves hold immense economic importance by supporting fisheries, aquaculture, timber, fuelwood, and honey production, which sustain the livings of millions of coastal communities. They act as natural bio-shields, minimizing the economic losses from floods and storms, while simultaneously promoting ecotourism and offering avenues for sustainable coastal development, as shown in Figures 4 and 5.

Fisheries Support

Mangroves serve as vital nursery grounds for commercially important fish and crustaceans, with their intricate root systems providing shelter from predators and currents for juvenile species (12, 63). Healthy mangrove forests directly enhance fishery productivity, as evidenced by positive["Figure", "https://etflin.com/file/figure/20251222032317791673651.png", "Figure 4. Different economic significances of Mangrove ecosystems.", "", "100%", "2"]correlations between mangrove presence and fish catch rates in adjacent waters (64). This productivity is highest in mangroves with robust growth, freshwater inputs, and intact ecosystems, particularly along fringe habitats where fish populations concentrate (65). The structural complexity of roots, tidal channels, and pools further supports fisheries by offering refuge and sustaining prey like bivalves (65). Beyond nursery functions, mangroves sustain food webs through organic matter export (e.g., detritus) to seagrass beds and coral reefs, amplifying fishery yields (3). These ecosystem services underpin artisanal and commercial fisheries globally, supporting millions of livelihoods (6, 15). However, mangrove loss from aquaculture, deforestation, and urbanization has severely degraded fishery resources (66). Notably, while fish catches peak near human settlements where fishing effort and markets converge these mangroves face heightened threats from pollution and overfishing (65). Targeted conservation and sustainable management of these vulnerable areas are essential for securing both ecological integrity and long-term economic benefits.

Timber and Non-Timber Forest Products (NTFPs)

Mangrove forests ecosystem serve as vital reservoirs of both timber and non-timber  forest products (NTFPs), supporting coastal communities through diverse economic and medicinal resources. The durable wood of Rhizophora, Avicennia, Bruguiera, Xylocarpus, and Sonneratia species is highly valued  for its resistance to decay and damage by insects, making it ideal for construction (housing, boat building, furniture), fuelwood, and charcoal (7, 67-69). Beyond timber, mangroves provide nutritious fodder, particularly from Avicennia marina, sustaining livestocks (70). The medicinal potential of mangroves is equally significant, with traditional applications ranging from treating skin ailments and ulcers to dysentery (71, 68, 72). Bioactive compounds from species like Nypa fruticans and Ceriops spp. exhibit antimicrobial properties, while the mangrove-associated tunicate Ecteinascidia turbinata shows promise in cancer research (73, 74). Additionally, tannins from Rhizophora mucronata and Ceriops tagal are vital for leather tanning and dyeing (71).["Figure", "https://etflin.com/file/figure/20251222032526668048810.jpg", "Figure 5. Mangrove ecosystems.", "", "100%", "2"]Mangroves further bolster local economies through NTFPs like honey (75) and fisheries (76), while their role in carbon sequestration and coastal protection highlights their ecological value (77, 55). However, overharvesting and habitat degradation threaten these ecosystems (78), necessitating community-based conservation and sustainable harvesting practices (8). Balancing utilization with preservation is key to ensuring mangroves continue to sustain livelihoods while maintaining their critical ecological functions.

Ecotourism and Recreation

Successful ecotourism models in Bali’s mangrove forestsand Vietnam’s Cần Giờ Biosphere Reserve demonstrate how tourism can be effectively integrated with biodiversity conservation (84, 85). Beyond recreation, mangrove ecotourism serves important educational functions. Research tourism, student field visits, and nature-based learning activities contribute to scientific understanding and promote environmental awareness (86). Health and wellness tourism, including meditation and therapeutic retreats, further utilize the calming and restorative qualities of mangrove environments (87).

These diverse activities align closely with multiple Sustainable Development Goals particularly those related to responsible consumption, climate action, and marine ecosystem protection (88). The economic contributions are substantial, with ecotourism generating employment, supporting small-scale enterprises, and providing alternative income streams for coastal communities (89). In regions such as the Sundarbans and the Everglades, tourism revenue directly supports conservation and management programs, reinforcing local incentives for ecosystem protection (79, 83). Overall, mangrove ecotourism represents a sustainable strategy for coastal zone management under increasing climatic and environmental pressures.

Water Filtration

Mangrove ecosystems function as highly efficient natural water purification systems in coastal environments. Their complex root networks trap sediments and contaminants (90), reducing offshore turbidity while offering protection against shoreline erosion (91). This filtration capacity safeguards adjacent habitats particularly coral reefs and seagrass meadows from sedimentation and nutrient overload, thus supporting the goals outlined in SDG 14: Life Below Water (92).

The saline environment in which mangroves thrive exemplifies their exceptional filtering capabilities. Some mangrove species can remove up to 90% of sodium ions from seawater (93) through a specialized multilayered root epidermis that selectively restricts Na⁺ entry (94). For instance, Rhizophora stylosa roots demonstrate a hierarchical pore structure with an elevated zeta potential in the outer layer, effectively excluding sodium ions and providing a model for sustainable desalination technologies (95).

In the Río Coco Solo estuary of Panama, mangrove vegetation significantly mitigates anthropogenic nutrient inputs (96-99). Many mangrove species also support phytostabilization of toxic metals within intertidal soils (99), reducing the mobility and ecological impact of heavy metals in polluted estuaries. These services are particularly crucial in regions experiencing high nutrient loads from agriculture, aquaculture, and urban wastewater.

Genetic Resources with Biotechnological Potential

Mangroves, adapted to extreme intertidal conditions, possess unique genetic and biochemical traits that enable them to withstand salinity, waterlogging, and oxidative stress. These specialized adaptations offer promising applications in biotechnology (100). Numerous mangrove-associated microorganisms such as Penicillium, Chaetomium, Humicola, Melanocarpus, and Bacillus species are utilized in diverse industrial sectors including pulp and paper processing, animal feed manufacturing, bakery and beverage fermentation, and xylitol production (101).

Marine algae such as Codium fragile, C. latum, C. dwarkense, and C. tomentosum produce compounds like phyllacoid, agar, carrageenan, and alginate, all demonstrating anticoagulant properties (102, 103). Fungal extracts containing ethyl acetate derivatives act as biopesticides (104, 105). Halophilic bacteria synthesize polyketide synthases (PKSs) responsible for producing medically important compounds such as erythromycin, rapamycin, tetracycline, lovastatin, and resveratrol (106).

Other enzymes including catalase, peroxidase, oxidase, polyphenol oxidase, and ascorbic acid oxidase from Pseudomonas aeruginosa, P. alcaligenes, and Methylococcus spp. hold significant industrial value (107). Additional enzymes such as proteases, amylases, lipases, and esterases produced by members of Vibronales, Actinomycetales, and Bacillales are used in food, pharmaceutical, and biofuel industries (108). Phytase derived from Bacillus circulans, B. licheniformis, and B. pantothenicus is important in agriculture (109), while lipopeptides and glycolipids from Bacillus subtilis and Pseudomonas aeruginosa act as effective biosurfactants (110).

Mangrove-associated fungi such as Preussia aurantiaca synthesize auranticins A and B with strong antimicrobial properties (111). Aigialus parvus yields aigialomycins A–E and hypothemicin, compounds with notable antimicrobial activity (112). Actinomycetes produce secondary metabolites exhibiting anti-cancer, anti-tumor, and anti-infective activities (113). Xylaria species generate xyloketals A–E, known inhibitors of acetylcholinesterase (114), while isoflavones and prostaglandin derivatives from Phomopsis, Paecilomyces, Sargassum, and Halorosellinia species display anti-cancer effects (115).

Bacteria such as Pseudomonas, Shewanella, Sphingomonas, Arthrobacter, Marinobacter, Alcanivorax, Microbulbifer, Micrococcus, Cellulomonas, Dietzia, and Gordonia contribute to bioremediation by degrading polyaromatic hydrocarbons and oil contaminants (116-121). Basidiomycetes enhance remediation efforts through the production of laccase (122, 123). Phosphatases from B. licheniformis, Chryseomonas luteola, Pseudomonas stutzeri, and Aspergillus niger provide agricultural benefits (124, 125), while halophilic archaea such as Halococcus synthesize L-asparaginase for industrial use (126). Enzymes like xylanase and ligninase, produced by Aspergillus niger and Phlebia spp., are used in paper and biofuel industries (127). Biosurfactants from Leuconobacter, B. subtilis, and P. aeruginosa have wide biotechnological applications (128). Fusarium species release enniatin G, an antimicrobial compound (129), while Verruculina enalia produces enalin A and B with similar activities (114, 130-132). Additionally, fungal metabolites such as β-carboline, adenosine, and 8-hydroxy-3,5-dimethylisochroman-1-one show potent anti-tumor properties (132). Stress-adapted genes from mangrove plants further provide valuable resources for developing crops tolerant to salinity and drought. NHX-type antiporters and osmoprotectant biosynthetic genes from Avicennia marina and Rhizophora species, when expressed in Arabidopsis, significantly improve stress tolerance (133). The microbial associates of the seagrass Syringodium isoetifolium showed notable antibacterial activity, with Actinomycetes sp. (Act01) emerging as the most potent isolate against antibiotic-resistant and fish bacterial pathogens. Phylogenetic and GC–MS analyses confirmed Act01 as a Streptomyces species producing a major anthraquinone compound, highlighting its potential as a novel antibacterial agent (134). Collectively, mangrove-associated microorganisms represent powerful reservoirs of novel bioactive metabolites and genetic resources with applications in pharmaceuticals, bioremediation, and climate-resilient agriculture (135).

A growing body of literature from 1991–2025 documents expanding mangrove research across Western Asia, with major themes centred on biodiversity, climate change adaptation, and socio-economic relevance (136). Reviews highlight key strengths such as the robustness of Avicennia marina and rising institutional collaboration (136). However, persistent weaknesses including fragmented governance and insufficient data integration are compounded by threats from climate change, industrial expansion, and transboundary pollution (136).

Research Gaps and Future Directions

Based on the synthesis of 135 studies, several cross-cutting research gaps emerge. First, empirical work is heavily concentrated in Southeast Asia, with limited data from Latin America, Africa, Western Asia, and small island states, underscoring the need for harmonized field and remote-sensing assessments in under-represented regions. Second, blue carbon research focuses largely on above-ground biomass and the top 1 m of soil, with deep soil carbon, lateral fluxes, and post-disturbance dynamics remaining poorly understood, calling for long-term, depth-resolved carbon studies. Third, economic valuations of fisheries, NTFPs, ecotourism, and carbon credits employ heterogeneous methods and rarely adopt standardized TEV or PES frameworks, limiting robust analysis of trade-offs and opportunity costs. Fourth, evidence on coastal protection, water filtration, and pollution control is often site-specific and short-term, highlighting the need for multi-site, long-term monitoring that links mangrove structure and water-quality regulation to risk-reduction metrics and downstream ecosystem health. Finally, biotechnological potential, governance, and carbon-credit schemes are underexplored beyond discovery-level studies; future research should move towards pre-clinical/industrial pipelines, rigorous analysis of governance and equity, robust MRV frameworks for blue carbon projects, and long-term evaluation of hydrologically sound restoration designs under climate-change scenarios.

Conclusion

Mangroves are among the planet’s most valuable yet increasingly threatened ecosystems. Although they occupy a relatively small portion of global coastlines, their ecological and socio-economic contributions are disproportionately large. Ecologically, mangroves function as biodiversity hotspots, nursery habitats for aquatic species, natural coastal defense systems, and highly efficient blue carbon stores substantially mitigating the impacts of climate change. Economically, they support millions of livelihoods through fisheries, timber and non-timber products, ecotourism, and emerging carbon-credit markets, while offering cost-effective alternatives to engineered coastal infrastructure. However, escalating pressures ranging from pollution and deforestation to aquaculture expansion and sea-level rise underscore the urgency of integrated conservation strategies. Protecting and restoring mangroves is both an ecological necessity and a socio-economic imperative, as their loss would jeopardize food security, coastal resilience, and climate regulation for millions of people. Future efforts must therefore prioritize ecosystem-based management, combining habitat restoration, community participation, robust policy frameworks, and sustainable resource use. Recognizing mangroves as both ecological keystones and economic assets will be essential for ensuring their continued role as nature-based solutions for a resilient and sustainable future.