Grass-wrack Pondweed
CR

Grass-wrack Pondweed

Potamogeton compressus

UnknownDDEUDDEU

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

Overview

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

Wrack-like Pondweed faces severe population declines due to widespread habitat destruction and degradation of freshwater ecosystems. Eutrophication from agricultural runoff and urban development has dramatically altered water chemistry in many of its remaining habitats, while drainage of wetlands for agriculture and development has eliminated numerous historical populations.

Threat summary

Habitat

Shallow freshwater lakes, ponds, slow-flowing rivers, and alkaline waters, typically in nutrient-poor to moderately nutrient-rich aquatic environments. The species grows submerged in clear waters at depths of 0.5-3 meters, often in calcareous or brackish conditions.

Other threatened species in Potamogetonaceae

Potamogeton angustifoliusCR

Potamogeton angustifolius

Unknown
Opposite-leaved PondweedEN

Opposite-leaved Pondweed

Groenlandia densa

Unknown
Flat-stalked PondweedCR

Flat-stalked Pondweed

Potamogeton friesii

Unknown
Horned PondweedVU

Horned Pondweed

Zannichellia palustris

Unknown

Frequently asked questions

Why is Grass-wrack Pondweed classified as Critically Endangered?
Grass-wrack Pondweed 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. Wrack-like Pondweed faces severe population declines due to widespread habitat destruction and degradation of freshwater ecosystems. Eutrophication from agricultural runoff and urban development has dramatically altered water chemistry in many of its remaining habitats, while drainage of wetlands for agriculture and development has eliminated numerous historical populations.
Where does Grass-wrack Pondweed live?
Grass-wrack Pondweed 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 Grass-wrack Pondweed?
The main threats to Grass-wrack Pondweed 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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