Scientists warn of possible invasive species superspreader event due to stalling near Strait of Hormuz
Scientists Warn of Possible Invasive Species Crisis Near Strait of Hormuz
Tyunews.com – Scientists warn of possible invasive species spreading globally as commercial vessels remain stalled near the Strait of Hormuz amid escalating geopolitical tensions. Marine biologists are raising urgent alarms about a potential ecological crisis triggered by ships sitting idle in one of the world's most critical shipping corridors. According to researchers, the prolonged stationary periods of these commercial vessels could create unprecedented conditions for a massive dispersal of invasive marine organisms across international waterways.
Conflict Disrupts Vital Shipping Corridor
The strategic waterway has become increasingly volatile since hostilities with Iran erupted in February. In response to ongoing military confrontations, Iranian forces have intermittently restricted tanker movements through this essential maritime passage. The strait connects the Persian Gulf to the Gulf of Oman and facilitates the transport of approximately one-fifth of global petroleum supplies, as documented by the U.S. Energy Information Administration.
Recent developments have significantly intensified the situation. American naval forces recently reinstated their blockade following Iranian attacks on oil tankers navigating the narrow strait. Current estimates indicate that more than 1,500 commercial vessels remain anchored in the Persian Gulf, with additional hundreds waiting in the Gulf of Oman for conditions to improve.
Biofouling Creates Invasive Species Highway
A comprehensive study released Wednesday in the journal Biological Invasions highlights how extended periods of inactivity accelerate biofouling on ship hulls. This biological accumulation encompasses microorganisms, algae, aquatic plants, and various invertebrates that attach to vessel surfaces during extended stays.
"Once invasive species take hold of a foreign ecosystem, it's nearly impossible to get rid of them," Tamburri said.
Mario Tamburri, a marine ecologist at the University of Maryland's Center for Environmental Science and lead author of the research, explained that biofilm develops along commercial ship sides before being carried worldwide as vessels move between ports. The consequences extend beyond ecological disruption. Tamburri noted that these invading organisms can generate millions of dollars in damages while affecting commercial operations such as aquaculture and fisheries, ultimately transforming local environments.
Global Shipping Network Connectivity Analysis
The research examined a comprehensive shipping network comprising 3,027 distinct vessels that made 248,362 calls across 3,517 unique ports and anchorages. Analysis of connectivity patterns revealed the potential reach of species transport after ships departed the Gulf region beginning February 27, 2025. One-month projections showed immediate global connectivity, while one-year estimates demonstrated extensive worldwide distribution potential.
Historical precedents illustrate the severity of such invasions. Zebra mussels, originally native to the Caspian and Black Seas located south of Russia and Ukraine, proliferated rapidly throughout the Great Lakes during the 1980s. The National Park Service reports that these organisms now inhabit the Mississippi and St. Croix Rivers, with additional populations established on the West Coast through human-mediated transport.
"We know that these invading organisms can cause millions of dollars' worth of damage and impact -- commercial operations like aquaculture and fisheries -- and change the environment," Tamburri said.
According to the NPS, once zebra mussels establish themselves within a water body, removal becomes exceedingly difficult. Tamburri observed that ecologists have been engaged in this struggle for half a century.
Anti-Fouling Coatings and Future Prevention
Commercial vessels typically feature specialized anti-fouling paint containing chemical compounds designed to prevent marine organisms from adhering to hull surfaces. However, Tamburri explained that extended stationary periods diminish the coating's efficacy, enabling substantial biological growth on vessel exteriors.
Similar conditions emerged during the COVID-19 pandemic when numerous ships worldwide experienced prolonged delays, creating opportunities for extensive biofouling development. As tensions continue to escalate, scientists warn that the current situation near the Strait of Hormuz represents a critical window for preventing what could become a global ecological catastrophe through the transport of invasive marine species.