Evaluating the Habitat Conditions of Bruguiera hainesii C.G. Rogers 1919 in Con Dao National Park, Vietnam
Аннотация
Purpose. Con Dao is an archipelago located off the southern coast of Vietnam and is administratively part of Ba Ria – Vung Tau province. Socio-economic development and tourism expansion have exerted pressure on the local environment, increasing the risk of pollution from domestic wastewater and solid waste. Additionally, coastal erosion due to increasingly strong currents has reduced sediment deposition capacity, directly impacting the habitat of the critically endangered mangrove species Bruguiera hainesii C.G. Rogers 1919.
Materials and methods. This study analyzed soil samples from mangrove forests surrounding Hon Ba Island in Con Dao National Park to assess the risk of heavy metal pollution in the area. Additionally, the Digital Shoreline Analysis System (DSAS) was applied to monitor and analyze changes in the mangrove shoreline at specific locations, providing an accurate assessment of environmental changes affecting the distribution of Bruguiera hainesii.
Results. The research findings reveal that Bruguiera hainesii in Con Dao is influenced by various environmental factors. The low phosphorus (P₂O₅) levels in the soil may hinder tree growth, as phosphorus is a crucial nutrient for the mangrove ecosystem. Although the concentrations of heavy metals such as Cd, Pb, and Zn remain within safe limits, potential environmental concerns persist.
Notably, satellite imagery analysis conducted since 2016 using DSAS, which examined shoreline variations through 571 cross-sections, has provided essential insights into coastal dynamics, erosion patterns, and sediment deposition changes. The results highlight the significant impact of tidal waves, leading to accelerated coastal erosion and reduced sediment accumulation - an essential process for mangrove forest regeneration. These factors threaten the population size and long-term survival of B. hainesii, a species already classified as extremely rare in nature.
Conclusion. The research findings provide essential scientific evidence for Ba Ria – Vung Tau province to develop effective sediment management strategies aimed at protecting and restoring mangrove ecosystems, particularly the habitat of Bruguiera hainesii.
EDN: IQVEVQ
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Copyright (c) 2025 Thi Thu Trang Hoang, Mai Phuong Pham, Van Dien Pham, Quoc Khanh Nguyen, Le Hung Trinh, Dinh Duy Vu
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