Jätkvus

Jätkvus is a rare Icelandic term referring to a specific phenomenon observed in certain aquatic ecosystems, characterized by the sudden and rapid transformation of coral and sponge communities into an overgrown, algal-dominated state. The term encompasses processes that lead to a shift in ecosystem structure, often resulting in a decline of biodiversity and habitat complexity.

This phenomenon typically occurs in response to environmental stressors such as increased nutrient loading, elevated sea temperatures, or physical disturbances like storms or human activities. Under these conditions, algal species and opportunistic microorganisms outcompete corals and sponges, forming dense mats that inhibit the recruitment and growth of native species. The result is a less diverse and less resilient ecosystem that can persist for extended periods if conditions remain unfavorable.

Jätkvus is of particular concern in marine conservation and management, as it signals a regime shift that can undermine the ecological functions and services provided by coral and sponge communities, such as habitat provision, water filtration, and nutrient cycling. Understanding the drivers and mechanisms behind jätkvus is essential for developing effective mitigation strategies, including reducing nutrient pollution and establishing protected areas to bolster ecosystem resilience.

The concept has gained attention within scientific research and environmental policy, especially in regions where climate change and pollution threaten coastal and marine biodiversity. Managing jätkvus involves monitoring environmental parameters, promoting sustainable resource use, and restoring habitat quality to prevent or reverse these undesirable community conversions.