Home / Environment / From Shoreline Saver to Nuisance: Hawaii's Mangrove Story
From Shoreline Saver to Nuisance: Hawaii's Mangrove Story
29 Oct
Summary
- Red mangroves were planted in 1902 to stabilize Hawaii's coastlines.
- The invasive trees now hinder drainage and create foul odors.
- Mangroves reduce vital habitat for endangered native waterbirds.
In 1902, red mangroves were introduced to Hawaii, primarily on Molokai, with the goal of stabilizing coastal mudflats against erosion. This well-intentioned project, documented in a 1998 U.S. Forest Service paper, soon revealed unforeseen consequences.
The fast-spreading mangroves quickly invaded canals and streams across the Hawaiian islands, becoming a nuisance. They trap debris, impede water drainage, and can create foul odors, leading to costly removal efforts in areas like Kailua, Oahu.
Beyond immediate nuisances, the red mangroves pose a significant threat to native wildlife. They occupy areas crucial for the recovery of four endemic waterbirds, including the endangered Hawaiian stilt, by replacing their preferred feeding and nesting grounds.
