Isoetes taiwanensis
CR

Isoetes taiwanensis

Unknown

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

Overview

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

Isoetes taiwanensis faces severe threats from habitat destruction due to agricultural expansion and urban development in Taiwan's lowland areas. The species' extremely restricted range makes it particularly vulnerable to water pollution from agricultural runoff and industrial activities. Dam construction and water diversion projects have altered natural water flow patterns in the few remaining wetland habitats where this quillwort survives.

Threat summary

Habitat

Isoetes taiwanensis inhabits shallow freshwater pools, seasonal wetlands, and marshy areas in Taiwan's lowland regions. The species requires clean, nutrient-poor waters with sandy or muddy substrates where it can establish its distinctive rosette growth form.

Other threatened species in ISOETACEAE

EN

Gascoyne Quillwort

Isoetes boryana

Declining
VU

Azorean Quillwort

Isoetes azorica

Declining
EN

Greek Quillwort

Isoetes haussknechtii

Unknown
CR

Isoetes hewitsonii

Unknown

Frequently asked questions

Why is Isoetes taiwanensis classified as Critically Endangered?
Isoetes taiwanensis 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. Isoetes taiwanensis faces severe threats from habitat destruction due to agricultural expansion and urban development in Taiwan's lowland areas. The species' extremely restricted range makes it particularly vulnerable to water pollution from agricultural runoff and industrial activities. Dam construction and water diversion projects have altered natural water flow patterns in the few remaining wetland habitats where this quillwort survives.
Where does Isoetes taiwanensis live?
Isoetes taiwanensis 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 Isoetes taiwanensis?
The main threats to Isoetes taiwanensis 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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