Branchinecta sandiegonensis
EN

Branchinecta sandiegonensis

Unknown

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

Overview

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

The San Diego fairy shrimp faces severe habitat loss due to urban development and agricultural conversion throughout its limited range in southern California and Baja California. Remaining vernal pools are increasingly fragmented and degraded by invasive plant species, altered hydrology from surrounding development, and contamination from urban runoff and pesticides. Climate change poses an additional threat through altered precipitation patterns that could disrupt the precise seasonal flooding cycles essential for this species' reproduction.

Threat summary

Habitat

Branchinecta sandiegonensis inhabits seasonal vernal pools and ephemeral wetlands in coastal sage scrub and chaparral ecosystems of southern California and northern Baja California. These temporary pools fill with winter rains and dry completely by late spring, creating the specific hydroperiod conditions required for the species' life cycle.

FRESHWATER· major

Frequently asked questions

Why is Branchinecta sandiegonensis classified as Endangered?
Branchinecta sandiegonensis is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. The San Diego fairy shrimp faces severe habitat loss due to urban development and agricultural conversion throughout its limited range in southern California and Baja California. Remaining vernal pools are increasingly fragmented and degraded by invasive plant species, altered hydrology from surrounding development, and contamination from urban runoff and pesticides. Climate change poses an additional threat through altered precipitation patterns that could disrupt the precise seasonal flooding cycles essential for this species' reproduction.
Where does Branchinecta sandiegonensis live?
Branchinecta sandiegonensis occurs in Mexico, and 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 Branchinecta sandiegonensis?
The main threats to Branchinecta sandiegonensis 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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