Objective: To provide the responsible authority, CONANP Encrucijada, with the taxonomic identity of the folivorous larvae found on mangrove species and associated with their mortality.Design/Methodology/Approach: Through field surveys in affected areas, larval specimens were collected for confinement, rearing, and observation until their metamorphosis into adults. External morphological characters were then reviewed, focusing on wing vein patterns, dorsoventral coloration, the presence of light and dark bands, and circular markings such as ocelli, to determine taxonomic identity using keys and image comparisons.Results: The taxonomic identity of the collected larvae corresponded to two families within the order Lepidoptera: Nymphalidae and Hyblaeidae, and the species Junonia evarete (Cramer) and Hyblaea puera (Cramer), respectively.Study Limitations/Implications: The presence of both species, each capable of consuming large amountsof foliar biomass while exploiting the same host, implies more severe damage to leaf tissue. This necessitates ongoing evaluation and monitoring to understand their impact on the optimal development and recovery of Avicennia germinans.Findings/Conclusions: The results represent the first report of the distribution of these two Lepidoptera species in the La Encrucijada Biosphere Reserve. A comprehensive study on the impact of folivory on Avicennia germinans and its relationship with environmental degradation is urgently needed.

Evidence of bioaccumulation of selected persistent organic pollutants in a tropical estuary in southern Puerto Rico.

Two new oxygenated solanapyrone analogues, nigrosporapyrone E (1) and nigrosporapyrone F (2), were isolated from Nigrospora sp. strain IQ-064, a fungus associated with the bark of black mangrove (Avicennia germinans L.), along with seven known compounds. A targeted metabolomic strategy, on the basis of molecular networking and chemotaxonomic criteria, facilitated the isolation of these compounds. Their structures were characterized using HRESIMS and NMR spectroscopic analysis, whereas their relative configurations were established through NOE correlations. The absolute configuration of the new natural products was determined by comparison of experimental and calculated electronic circular dichroism (ECD) spectra, showing consistency with the recently reported natural product sphasolanapyrone A. Considering previous bioprospecting studies of this fungal strain, the isolated compounds were evaluated for their ability to inhibit human protein tyrosine phosphatase 1B (hPTP1B1-400), a validated target for developing anti-diabetic drugs, as well as for their inhibitory activity against the pathogen Acinetobacter baumannii clinical isolate A564. However, no significant activity was observed in either bioassay. In addition, their ADME properties and probable bioactivity spectrum, predicted through SwissADME and PASS analysis, respectively, were analyzed to investigate alternative molecular targets within this compound family.

Mangrove forests are known for their exceptional carbon storage capacity, but the influence of environmental factors on this service remains understudied. This study examines how environmental conditions shape tree community composition and carbon storage in Mallorquin Swamp, an urban mangrove ecosystem in Barranquilla, Colombia. We assessed tree composition, vegetation structure, soil pH, and salinity across 18 circular plots in areas of Low, Medium, and High salinity. Above ground biomass (AGB) and carbon stock were estimated using allometric equations and wood density databases. Our findings revealed significant salinity differences among sampling areas, especially during the dry season, while soil pH showed minimal variation. Avicennia germinans was dominant in Low salinity areas, Laguncularia racemosa in Medium salinity areas, and Rhizophora mangle in High salinity areas. Trees in Low salinity zones were notably taller and larger, contributing to significantly higher carbon stock (4098.6Mg C) compared to Medium (104.6Mg C) and High (1761Mg C) salinity areas. These results underscore the importance of local environmental factors, particularly salinity, in shaping mangrove structure and carbon dynamics. Identifying such patterns is vital for guiding conservation efforts and carbon policies, particularly in urban and climate-sensitive areas, where focused management can strengthen mangrove resilience and carbon storage.

As coastal regions experience accelerating land loss, artificial substrates may be useful in restoration efforts to replenish sediment and facilitate plant colonization. Recycled glass sand is a potential artificial substrate for marsh building due to its sustainability, availability, and similarity to natural substrates. However, differences in texture and availability of microbiota necessitate investigating how it affects plant growth. We tested the effect of three substrates (conventionally used dredged river sand, recycled glass sand, and a mix) and inoculation with natural soil microbes on the biomass and root architecture of Black mangrove (Avicennia germinans) in a greenhouse experiment. We found neither substrate nor inoculum affected biomass; however, survival was lower in mixed substrate compared to dredged and glass sand, and live inoculum increased survival from 70 to 93%. Substrate affected root architecture: mangroves grown in glass sand had 55% lower fine root length, 51% lower specific root length (length/mass), and 26% larger average root diameter than mangroves grown in dredged sand. Although an unintended fungal infection by Geotrichum candidum killed nearly 90% of infected propagules before the experiment, surviving plants had 81% higher biomass than uninfected plants. These findings suggest that while glass sand does not affect biomass, it may affect root architecture in ways that compromise soil stability. Furthermore, inoculation with live soil may boost restoration planting success across substrates, likely by reintroducing mutualists. Overall, recycled glass sand may be a viable restoration strategy with the caveat that the developing root architecture may differ from that in more natural substrates.

ABSTRACTMangroves are known as highly functional and productive ecosystems despite the numerous human and environmental disturbances they face continuously. These disturbances are known to affect their ecosystem states as well as their biomass allocation in their roots, trunks, stems, and leaves. We utilized a combination of plotless sampling methods and established common allometric equations to examine and compare the aboveground, trunk, and root weights of over 600 Avicennia germinans trees found along the Guyana coastline in natural, degraded, and restored ecosystems. Our results highlighted that while the restored ecosystems possessed taller trees with greater densities, the natural ecosystems possessed trees with greater aboveground (54396.24 kg/ha), trunk (19127.08 kg/ha), and root weights (20984.44 kg/ha) due to greater diameter at breast height values (> 30–40 cm). Furthermore, positive correlation coefficients (0.97 < rs < 1.00) and regression values (p < 0.05) yielded compelling evidence in favor of the relationship between biomass allocation through tree organ weights and ecosystem types. Our findings support the notion that the composition and magnitude of disturbances within an ecosystem may affect mangrove tree biomass, hence influencing the net primary productivity of mangrove forests over time. This may have implications for their ability to accumulate and allocate biomass, as well as store carbon in the future. As such, the proactive conservation of existing mangrove forests is crucial for sustaining their productivity and viability, as well as augmenting their significance in biogeochemical cycles and their role in mitigating climate change.

ABSTRACTMangrove forests are expanding poleward due to ongoing climate change. Near the range limits of mangrove expansion, stressors such as salinity and vapour pressure deficit play a critical role in shaping ecosystem carbon and water fluxes. These stressors, which often compound, are expected to become more severe with ongoing climate change. Here, we analysed the independent and coupled impacts of salinity and VPD stresses on plant hydraulics and photosynthesis in Avicennia germinans in a greenhouse experiment. We exposed A. germinans grown in low‐salinity (10 parts per thousand [ppt]), midrange‐salinity (20 ppt) and high‐salinity (40 ppt) regimes to a 30‐ppt NaCl treatment and to high‐ and low‐VPD conditions. Plants experiencing high osmotic stress had a stronger relationship between ψs and VPD than plants experiencing lower osmotic stress, highlighting the impact of compounding stressors on plant hydraulics. Under osmotic stress and non‐limiting VPD conditions, root traits regulated gas exchange and water movement. Under high VPD, the most dominant water‐regulating traits shifted from roots to leaves, with increased stomatal closure acting to conserve water at the cost of reduced photosynthetic uptake. Isohydricity in A. germinans was revealed to be dynamic. Under increased atmospheric and osmotic stress, plants become more isohydric. While under low stress, they behaved more anisohydrically. Plants maximized carbon gain when chances of embolism were low and minimized water loss at the expense of carbon gain under high‐stress scenarios. Dynamic shifts acted as a resilience mechanism against cavitation, allowing plants to survive under a wide range of conditions. Our results highlight the plasticity of A. germinans' hydraulic strategy and its ability to cope with combined salinity and VPD stresses.

Floral Visitors of Black Mangrove, Avicennia germinans 1, in the Gulf of California Central Coast, Sonora, Mexico

Mangrove ecosystems are of crucial importance in maintaining biodiversity and environmental stability. However, these ecosystems are increasingly threatened by anthropogenic and natural factors. The implementation of conservation strategies that take advantage of the unique functional traits of mangroves is therefore essential for their protection. This study employs the technique of Fourier transform infrared spectroscopy (FT-IR) to analyze the relationship between environmental factors and the functional properties of the leaves of white mangrove (Laguncularia racemosa), black mangrove (Avicennia germinans) and red mangrove (Rhizophora mangle). This analysis provides biochemical fingerprints that reveal the influence of environmental factors on ecosystem functioning, with significant correlations found between spectral bands and environmental variables. Temperature exhibited a correlation with band 1 (3323-3398 cm-1), linked to carbohydrates, proteins, alcohols and phenolic compounds. Salinity and bulk density influenced bands 3 (1717-1729 cm-1) and 4 (1614-1655 cm-1), associated with amide I, pectin, phospholipids and cholesterol esters. The influence of surface soil pH on band 7 (1130-1165 cm-1) reflected the presence of polysaccharides, while subsoil pH aligned with band 6 (1203-1237 cm-1), indicative of lignin and xylans. Furthermore, an association was observed between organic matter content and bands 5 (1462 cm-1) and 8 (999-1103 cm-1), indicating the role of cellulose and pectin in cell structure. Additionally, interstitial soil pH influenced bands 9 (815-884 cm-1) and 10 (719 cm-1), linked to cellulose and amide V stability, respectively. The findings demonstrate the significant impact of environmental factors (temperature, salinity and pH) on the chemical composition of mangrove ecosystems, and the results provide fundamental information on their biochemical adaptations. This supports the development of conservation strategies to improve the resilience and sustainability of these ecosystems. Keywords: mangrove, environmental changes, FT-IR

This study evaluates the diversity and host structure affinity of endophytic fungi in deltaic mangroves (Rhizophora. mangle, Lacugularia racemosa and Avicennia africana) of Iko River Estuary located in the Niger Delta of Nigeria. The endophytes were isolated using culture-dependent methods and identified on the basis of their cultural and morphological characteristics. An overall Simpson Diversity Index (SDI) of 0.9527 with a quantitative species diversity index (Shannon diversity index; HI) of 3.543 were obtained. The black mangrove (A. africana) community had the highest HI of 3.521 and maximum fungal emergence (Colony Frequency; CF of 75), followed by white mangrove (L. racemosa; HI of 2.982), while the least HI of 2.688 was observed for red mangrove (R. mangle). Black mangrove recorded a maximum fungal emergence (CF of 75) and the highest diversity (SDI of 0.9643). Its respiratory root (pneumatophores) was the most colonised (CF of 51) with an SDI of 0.9589. The pneumatophores harboured 43.6% of the culturable fungal colonies (CF = 172) encountered in the ecosystem. A rich species assemblage (56 species) was observed in the deltaic mangroves; however, only culture-dependent isolates were obtained. This explains the low number recorded for the three mangroves investigated compared to the over 200 species of fungal endophytes already associated with mangroves. The mangrove mycobiome was dominated by Aspergilli (50.58%)followed by Penicillium (9.30%) and Aspergillus niger with percentage CF of 30.86 was the most frequently isolated endophyte although statistical analysis revealed high evenness (e^H/S) in the occurrence of endophytes on mangrove plants and plant parts. The black mangrove stem had the most even (e^H/S value of 1) fungal community. Other fungal species, Aspergillus terreus (CF = 18.52%) and Absidia sp (CF = 12.35%) were also prevalent. This investigation provides a checklist of culturable species of endophytic fungi associated with Nigerian mangroves, many of which have been reported to have tremendous biotechnological potential.

Objective:To evaluate the growth of black mangrove (Avicennia germinans L.) in a nine-hectare plantation located in the Ejido La Solución Somos Todos, Paraíso, Tabasco, by assessing the height and diameter of plants established on Tecnosol soils. Design/Methodology/Approach: The plantation was established at a density of 625 plants per hectare. A Completely Randomized Design (CRD) was employed across three plots exhibiting similar edaphic characteristics. In each plot, 69 plants were randomly selected for monitoring. Measurements were conducted six months after planting using a graduated wooden ruler for height and a vernier caliper for diameter. ANOVA was applied to evaluate significant differences between plots, followed by Tukey’s test for multiple comparisons. Results: revealed statistically significant differences in plant growth. Plot 3 recorded the highest average height (75.08 ± 14.3 cm), while Plot 2 showed the greatest average diameter (0.46 ± 0.272 cm). In contrast, Plot 1 exhibited the lowest growth performance (45.33 ± 16.6 cm). These differences were directly associated with site quality despite the common use of landfill soils, certain areas offered more favorable conditions than others. The observed variation underscores the complexity of environmental dynamics influencing mangrove development. Study Limitations/Implications: A key limitation of this study lies in the influence of uncontrolled external factors, emphasizing the need for ongoing, long-term monitoring. Findings/Conclusions: Black mangrove growth is highly dependent on soil characteristics, moisture levels, solar radiation, and salinity.

Objective: To estimate the aboveground biomass and carbon storage of black mangrove (Avicennia germinans). Design/methodology/approach: Field measurements were conducted at 24 monitoring sites within the UMA, each encompassing 30 × 10 meter plots. Tree height and diameter at breast height (DBH) of A. germinans were recorded to estimate aboveground biomass using established allometric equations. Simulations and correlation analysis were performed using Wolfram Mathematica® software. Results: Carbon storage was derived by applying a biomass-to-carbon conversion factor. The average aboveground biomass across the study sites was 41.04 Mg·ha⁻¹, corresponding to an average carbon stock of 19.70 MgC·ha⁻¹. The simulation yielded a coefficient of determination (R²) of 0.734465. Limitations/implications: The study did not comprehensively account for environmental variables such as salinity, water level, and temperature, which may significantly influence biomass accumulation and carbon storage estimates. Findings/conclusions: The results underscore the role of A. germinans in climate change mitigation, highlighting its substantial carbon sequestration potential within the mangrove ecosystems of the Gulf of Mexico.

Objective: To estimate the aboveground biomass and carbon storage of red mangrove (Rhizophora mangle) within a designated conservation area. Design/Methodology/Approach: Data were collected from 24 monitoring sites within the UMA, using 30 × 10 meter plots. Measurements of diameter at breast height (DBH) and tree height were taken for Avicennia germinans individuals to estimate aboveground biomass via allometric equations. Simulations and correlation analyses were performed using Wolfram Mathematica® software. Results: Aboveground biomass varied considerably across sites, ranging from 4.23 Mg·ha⁻¹ at the lowest to 53.88 Mg·ha⁻¹ at the highest, with an overall average of 10.64 Mg·ha⁻¹. The mean carbon storage was 5.09 MgC·ha⁻¹. The modeling approach yielded a high coefficient of determination (R² = 0.991984), indicating strong predictive accuracy and good model fit. Study Limitations/Implications: The analysis was limited to carbon stored in the trunk, excluding other key compartments such as roots, foliage, and soil, which are important contributors to total carbon sequestration in mangrove ecosystems. Findings/Conclusions: The red mangrove population in the ejido “La Solución Somos Todos” demonstrates meaningful carbon storage capacity, though values are lower compared to similar studies in other regions. The strength of the model and the reliability of the estimates underscore the importance of continued research on mangrove carbon dynamics. These findings can support targeted conservation and restoration strategies, reinforcing the role of mangroves in climate change mitigation.

Abstract Mangroves play a crucial role in mitigating hurricane impacts in coastal ecosystems, and their adaptive traits enable regeneration and forest recovery following these disturbances. Yet, how species‐specific regeneration varies across life stages and interacts with environmental conditions is poorly understood. We quantified regeneration rates of three dominant species of mangrove seedlings and saplings (Avicennia germinans, Laguncularia racemosa, and Rhizophora mangle) recovering from a major hurricane. We selected forests with varying light availability and phosphorus (P) gradients in the Everglades (Florida, USA). From 2020 to 2022, we measured biannual stem elongation, height, and density of seedlings and saplings, and collected porewater variables (salinity, sulfide, and inorganic nutrients) and continuous light intensity to assess species‐specific drivers of regeneration. Species‐specific growth rates, total height, and density varied across sites, driven by differences in porewater P and light. Growth rates of R. mangle seedlings and both R. mangle and L. racemosa saplings were influenced by light, while A. germinans growth rates were unaffected. Only R. mangle and L. racemosa saplings were influenced by porewater P, while growth of both seedlings and saplings was unaffected by porewater salinity and sulfide. Mangrove regeneration post‐disturbance is explained by spatial differences in subsidies and stressors and the composition of species and life stages, underscoring complex regeneration strategies in mixed‐species forests.

This study investigated the anti-inflammatory and antioxidant activity of adventitious roots (AR) of Guyanese mangrove Avicennia germinans, used in folk traditional medicine (FTM). Using bio-guided fractionation, we searched for extracts with activities that can be used for therapeutic purposes. Our findings revealed an interesting anti-inflammatory activity of CH2Cl2 and EtOAc fractions from which eight compounds were isolated and identified by NMR: two naphtoquinone derivatives: avicennone C (1) and dehydro-α-lapachone (2), two triterpenes: β-betulinic acid (3) and betulinaldehyde (4), two phenylethanoid glycosides: trans-verbascoside (6) and isoverbascoside (8), one iridoid: geniposidic acid (5) and one naphtoquinone: rubinaphtin A (7). These compounds are described for the first time in the AR of A. germinans. Among them, 3 was the most active and abundant, suggesting that it mainly contributed to the fractions’ activity. This work reports the anti-inflammatory potential of A. germinans AR extracts for the first time and supports its use in FTM.

Por medio de análisis de polen y elementos geoquímicos, de un núcleo de sedimento de 1.5 m de profundidad, se identificaron cambios en la historia vegetal y ambiental de los últimos 3200 años de la Laguna Cementerio ubicada en el poblado de Xcalak, Quintana Roo. Los cambios en la composición y abundancia de Rhizophora mangle, Conocarpus erectus, Avicennia germinans y Laguncularia racemosa permitieron inferir cambios en la variabilidad hidrológica. Al inicio de los 3200 años cal AP se presentaron condiciones húmedas, la vegetación dominante era la selva, compuesta principalmente por elementos de Moraceae, Fabaceae, Euphorbiaceae, Rubiaceae y Bursera simaruba. Durante este periodo, los elementos de manglar estaban dominados por Avicennia germinans junto con la presencia de foraminíferos. El primer registro de Zea mays alrededor de 850 a.C (2800 cal AP) permitió identificar la presencia de actividades agrícolas cerca de la zona desde el Preclásico temprano hasta el Clásico tardío. La especie de manglar dominante era C. erectus, lo que sugiere fuertes cambios en la variabilidad hidrológica. Se lograron identificar, por medio de la curva de Ca/Σ (Ti, Fe, Al), dos periodos de sequía alrededor de 1700 y 850 cal AP, respectivamente. La sequía alrededor de 1700 cal AP podría estar asociada a una intensificación de ENSO y a un cambio en el gradiente de la temperatura superficial del mar y la salinidad que afectan la fuerza de la corriente de chorro del Caribe, provocando una disminución en la cantidad de precipitación para Mesoamérica. Durante ese mismo periodo se registró la mayor reducción de la selva y expansión de la sabana, lo cual permitió el depósito de Pinus sp. La sequía registrada alrededor de 850 cal AP es contemporánea con el periodo Clásico terminal. La comparación con otros registros climáticos de la región y del Circum-Caribe sugieren que las sequías del Clásico terminal estaban alternadas con periodos húmedos. El regreso de las condiciones húmedas alrededor de 700 cal AP permitió la recuperación de la cobertura vegetal. El presente estudio es un registro que aporta nuevas evidencias sobre los cambios en la Laguna Cementerio durante los últimos 3200 años, zona que ha sido poco estudiada desde el punto de vista paleoambiental.

Key messageWood of Laguncularia racemosa (L.) C.F. Gaertn. and Avicennia germinans (L.) L trees have similar chemical properties, while Rhizophora mangle L. is superior in physical-mechanical properties. It is highly suitable for charcoal production and civil construction.ContextWood from mangrove tree species has been widely used by traditional communities on the Amazon coast, although its chemical and physical-mechanical properties are unknown.AimsThis study intends to assess the chemical and physical–mechanical properties of wood from mangrove trees and compare data obtained from the three most dominant species: R. mangle, A. germinans, and L. racemosa.MethodsChemical and physical-mechanical properties of wood were analyzed in five trees of each mangrove species, using standards ASTM D1107-21, ASTM D1106-21, ASTM D1102-84, ASTM D2395-17, and ASTM D143/2014.ResultsAmong the chemical properties, A. germinans presented the highest values for ash, R. mangle for lignin and holocellulose, and L. racemosa for total extractives. Of the physical properties, R. mangle presents high values of basic density, tangential contraction, volumetric variation, and anisotropy coefficient, while A. germinans high values of radial contraction.ConclusionHigher-quality chemical properties present advantages in natural durability and resistance to xylophagous for A. germinans and L. racemosa, while higher lignin has better mechanical resistance for R. mangle and holocellulose and better charcoal production for L. racemosa. Such information is the basis for management in mangroves due to the multiple uses of mangrove wood and deforestation intensity in mangrove forests.

Mangrove forests are vital for flood reduction, yet their failure mechanisms during storms are poorly known, hampering their integration into engineered coastal protection. In this paper, we aimed to unravel the relationship between the resistance of mangrove trees to overturning and root distribution and the properties of the soil, while avoiding damage to natural mangrove forests. We therefore (i) tested the stability of 3D-printed tree mimics that imitate typical shallow mangrove root systems, mimicking both damaged and intact root systems, in sediments representing the soil properties of contrasting mangrove sites, and subsequently (ii) tested if the existing stability models for terrestrial trees are applicable for mangrove tree species, which have unique shallow root systems to survive waterlogged soils. Root systems of different complexities were modeled after Avicennia alba, Avicennia germinans, and Rhizophora stylosa, and printed at a 1:100 scale using material densities matching those of natural tree roots, to ensure the geometric scaling of overturning moments. The mimic stability increased with the soil shear strength and root plate surface area. The optimal root configuration for mimic stability depended on the sediment properties: spreading root systems performed better in softer sediments, while concentrating root biomass near the trunk improved stability in stronger sediments. An adapted terrestrial tree resistance model reproduced our measurements well, suggesting that such models could be adapted to predict the stability of shallow-rooted mangroves living in waterlogged soils. Field tree-pulling experiments are needed to further confirm our conclusions with real-world data, examine complicating factors like root intertwining, and consider mangrove tree properties like aerial roots. Overall, this work establishes a foundation for incorporating mangrove storm damage into hybrid coastal protection systems.

The mangrove ecosystem is reported to have a large diversity of species that develop in environments with high salinity levels. Plant species from mangroves are used in traditional medicine and are potential sources of chemicals entities with therapeutic applications. The present work aims to assess and document the influence of salinity on the antioxidant activity exerted by extracts of mangrove species through spectroscopic and chemical analysis. The highest salinity is recorded in Río Verde (RV) in Petén Neyac (PN), an LPBR site. The leaves of Laguncularia racemosa (from RV and PN) recorded the highest extraction yield (35.29 ± 0.45%). Phytochemical analysis indicated the presence of several families of secondary metabolites in the leaves of Rhizophora mangle, Avicennia germinans, and L. racemosa collected in PN and RV, and the chromatographic profile confirms the complexity of the extracts, especially in L. racemosa-RV. The highest content of chlorophylls, carotenoids, and simple phenols was recorded in R. mangle (in RV and PN); flavonoids were high in A. germinans (RV), and the highest antioxidant activity was recorded in L. racemosa (RV) using the DPPH model (EC50: 39.74 ± 0.91 μg/mL; Emax: 67.82 ± 1.00%). According to HPLC, gallic acid (GA), and quercetin (Q) are important metabolites in L. racemosa. FTIR spectra can identify several chemical groups and fingerprint regions in complex mixtures, such as methanolic extracts of the species under study. In this context, this is the first report on chemical changes resulting from species collected at sites with different degrees of salinity. GA is the main metabolite affected by salinity and participates in the antioxidant activity exerted by the original extract, which could explain the physiological adaptations of L. racemosa and its traditional uses. L. racemosa (RV) is ideal for a bioguided phytochemical study that would yield valuable knowledge about its medicinal properties, support ecological conservation, and drive innovation across multiple industries. Further analytical studies are needed to corroborate the impact of salinity on the biosynthesis of secondary metabolites.

Located at the interface between land and sea, mangroves develop both near the sea and inland. However, mangroves that develop inland have to cope with variable, high salinity; and urban pollution, as is the case with the mangroves of the Ambowé lagoon in Greater Libreville. Salinity is an important parameter for mangrove growth. The aim of this work was; yes itto show the impact of salinity on the density and mechanical strength of A. germinans wood exposed to hydrocarbon pollution. To this end, wood samples taken from the polluted Ambowé site were analyzed in the laboratory for wood and physical-mechanical properties. The data obtained were compared with wood samples taken from the unpolluted Oveng site, which has a higher salinity. The results show that for the polluted wood showed wider rings, lower wood density and mechanical strength with values of 0.91 ± 0.05 and 70.28 MPa, respectively. Also, the rings and vessels of Oveng wood are narrower than those of Ambowé wood. These differences are linked to salinity. Salinity therefore affects the density and mechanical strength of A. germinans wood exposed to hydrocarbon pollution.