VU

Stygobromus dejectus

Unknown

Overview

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

Stygobromus dejectus faces severe threats from groundwater contamination and aquifer depletion due to agricultural runoff and urban development in its limited range. The species' obligate dependence on pristine groundwater systems makes it extremely vulnerable to pollution from pesticides, fertilizers, and industrial chemicals that can persist in aquifers for decades. Water table lowering from excessive pumping for irrigation and municipal use directly destroys its habitat by drying up the cave and spring systems where it occurs.

Threat summary

Habitat

This obligate groundwater amphipod inhabits caves, springs, and underground aquifer systems in karst limestone regions. It requires pristine, oxygen-rich groundwater with stable temperatures and minimal chemical contamination.

FRESHWATER· major

Other threatened species in CRANGONYCTIDAE

VU

Stygobromus harai

Unknown
Allocrangonyx hubrichtiVU

Allocrangonyx hubrichti

Unknown
VU

Stygobromus putealis

Unknown
Allocrangonyx pellucidusVU

Allocrangonyx pellucidus

Unknown

Threatened in United States

Curlew SandpiperVU

Curlew Sandpiper

Calidris ferruginea

Declining
Argentinean Horned FrogVU

Argentinean Horned Frog

Ceratophrys ornata

Declining
VU

Paddlefish

Polyodon spathula

Unknown
EN

Polystachya longiscapa

Unknown

Frequently asked questions

Why is Stygobromus dejectus classified as Vulnerable?
Stygobromus dejectus 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. Stygobromus dejectus faces severe threats from groundwater contamination and aquifer depletion due to agricultural runoff and urban development in its limited range. The species' obligate dependence on pristine groundwater systems makes it extremely vulnerable to pollution from pesticides, fertilizers, and industrial chemicals that can persist in aquifers for decades. Water table lowering from excessive pumping for irrigation and municipal use directly destroys its habitat by drying up the cave and spring systems where it occurs.
Where does Stygobromus dejectus live?
Stygobromus dejectus occurs in United States. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Stygobromus dejectus?
The main threats to Stygobromus dejectus 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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