CR

Belgrandia alcoaensis

DecliningCREUCREU

Overview

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

Belgrandia alcoaensis faces severe threats from water extraction and groundwater depletion in its limited spring habitat range. Urban development and agricultural intensification in the surrounding watershed have altered natural water flow patterns, while pollution from agricultural runoff and domestic wastewater degrades the pristine spring water quality this endemic gastropod requires. Climate change-induced drought conditions further stress the already vulnerable spring ecosystems.

Threat summary

Habitat

This endemic freshwater gastropod inhabits natural spring systems and associated seepage areas with constant water flow and stable temperatures. The species requires pristine water quality with specific mineral compositions typical of limestone karst spring environments.

Wetlands (inland)· majorWetlands (inland) - Permanent rivers/streams· majorRocky areas· major

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Frequently asked questions

Why is Belgrandia alcoaensis classified as Critically Endangered?
Belgrandia alcoaensis 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. Belgrandia alcoaensis faces severe threats from water extraction and groundwater depletion in its limited spring habitat range. Urban development and agricultural intensification in the surrounding watershed have altered natural water flow patterns, while pollution from agricultural runoff and domestic wastewater degrades the pristine spring water quality this endemic gastropod requires. Climate change-induced drought conditions further stress the already vulnerable spring ecosystems.
Where does Belgrandia alcoaensis live?
Belgrandia alcoaensis occurs in Portugal. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Belgrandia alcoaensis?
The main threats to Belgrandia alcoaensis 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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