Aquatic Pygmyweed
CR

Aquatic Pygmyweed

Crassula aquatica

UnknownDDEUDDEU

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

Overview

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

Wrinkle-seed Pygmyweed faces severe threats from habitat loss due to wetland drainage, agricultural conversion, and urban development of its specialized aquatic environments. Climate change and altered hydrological patterns further threaten the ephemeral pools and shallow water bodies this species depends upon for survival.

Threat summary

Habitat

Shallow freshwater pools, pond margins, muddy shores of lakes and rivers, and seasonally flooded areas with exposed mineral substrates. The species typically occurs in ephemeral wetlands and disturbed aquatic habitats from lowland to montane elevations.

FRESHWATER· major

Threatened in Åland Islands

Scarce BlackneckCR

Scarce Blackneck

Lygephila craccae

Unknown
EN

Dolichopus notatus

Unknown
Haplodrassus cognatusCR

Haplodrassus cognatus

Unknown
Yellow-breasted BuntingCR

Yellow-breasted Bunting

Emberiza aureola

Declining

Frequently asked questions

Why is Aquatic Pygmyweed classified as Critically Endangered?
Aquatic Pygmyweed is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Wrinkle-seed Pygmyweed faces severe threats from habitat loss due to wetland drainage, agricultural conversion, and urban development of its specialized aquatic environments. Climate change and altered hydrological patterns further threaten the ephemeral pools and shallow water bodies this species depends upon for survival.
Where does Aquatic Pygmyweed live?
Aquatic Pygmyweed occurs in Åland Islands, Austria, Bolivia, Brazil, Canada, and Chile (plus 41 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Aquatic Pygmyweed?
The main threats to Aquatic Pygmyweed 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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