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<p>Monitoring acute environmental disturbances in mangrove ecosystems poses significant challenges due to substrate complexity and logistical constraints. Field investigations were conducted in a tropical mangrove system following an acute oil spill, utilizing a comparative framework between disturbed and reference sites. The study focused on the Burrow Activity Ratio (BAR) of brachyuran crabs as a biological indicator of disturbance. Our results demonstrate that hydrocarbon exposure induced a significant suppression in faunal vigor, with BAR declining from 77.9% to 55.3% (p = 0.0057). The high sensitivity and statistical significance of BAR suggest its efficacy as a robust early-warning tool. This study suggests that BAR may serve as a practical indicator for rapid ecological assessment of hydrocarbon disturbance in mangrove sediments.</p>

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Burrowing crab activity as an early indicator of hydrocarbon contamination in mangrove sediments using a multi-scale nested monitoring protocol (MNMP)

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Phu Quoc Dao,
  • Le Thanh Hai,
  • Le Thi Trang

摘要

Monitoring acute environmental disturbances in mangrove ecosystems poses significant challenges due to substrate complexity and logistical constraints. Field investigations were conducted in a tropical mangrove system following an acute oil spill, utilizing a comparative framework between disturbed and reference sites. The study focused on the Burrow Activity Ratio (BAR) of brachyuran crabs as a biological indicator of disturbance. Our results demonstrate that hydrocarbon exposure induced a significant suppression in faunal vigor, with BAR declining from 77.9% to 55.3% (p = 0.0057). The high sensitivity and statistical significance of BAR suggest its efficacy as a robust early-warning tool. This study suggests that BAR may serve as a practical indicator for rapid ecological assessment of hydrocarbon disturbance in mangrove sediments.