Spiral Tasselweed
VU

Spiral Tasselweed

Ruppia cirrhosa

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Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Ruppia_cirrhosa

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Spiral Tasselweed faces severe decline due to coastal development and water quality degradation in its shallow marine habitats. Rising sea levels and increased storm intensity associated with climate change threaten the delicate balance of salinity and water depth that this species requires. Pollution from agricultural runoff and urban development introduces excess nutrients and contaminants that disrupt the aquatic ecosystems where R. cirrhosa grows.

Threat summary

Habitat

Spiral Tasselweed inhabits shallow coastal waters, salt marshes, and brackish lagoons where it grows submerged in sandy or muddy substrates. The species requires specific salinity levels and calm waters, typically found in protected bays, estuaries, and coastal wetlands.

TERRESTRIAL· major

Frequently asked questions

Why is Spiral Tasselweed classified as Vulnerable?
Spiral Tasselweed is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Spiral Tasselweed faces severe decline due to coastal development and water quality degradation in its shallow marine habitats. Rising sea levels and increased storm intensity associated with climate change threaten the delicate balance of salinity and water depth that this species requires. Pollution from agricultural runoff and urban development introduces excess nutrients and contaminants that disrupt the aquatic ecosystems where R. cirrhosa grows.
Where does Spiral Tasselweed live?
Spiral Tasselweed occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Spiral Tasselweed?
The main threats to Spiral Tasselweed are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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