CISR: Didymo (or Rock Snot)

Aquatic Invasive Species

CISR: Didymo (or Rock Snot)

Wednesday, October 28th, 2009

The Situation: Didymo or rock snot, is a highly invasive species of freshwater diatom that can form large and extensive mats in rivers, streams, and lakes. Didymo is native to cool temperate areas of the northern Hemisphere including Europe, North America, and Asia. In 2004, didymo was discovered infesting freshwater rivers in the South Island […]

CISR: Chytrid Fungus

Saturday, August 8th, 2009

The Situation: Upwards of 40% of amphibian species are in decline worldwide, owing to several factors such as habitat loss, environmental degradation, pollutants, and disease. Recently the fungal pathogen Batrachochytrium dendrobatidis has emerged as a major threat to amphibians. Amphibians infected with B. dendrobatidis develop chytridiomycosis, which eventually causes death in susceptible species. The first […]

CISR: Quagga & Zebra Mussles

Thursday, May 28th, 2009

The Situation: Quagga and zebra mussels are aquatic invasive species that are native to eastern Europe. The quagga mussel originated from Dnieper River drainage of Ukraine. The zebra mussel was first described from the lakes of southeast Russia and its natural distribution also includes the Black and Caspian Seas. Quagga and zebra mussels get their […]

CISR: New Zealand Mud Snail

Wednesday, May 27th, 2009

The Situation: As the common name indicates, this invasive pest is native to New Zealand. New Zealand mud snail has had a long invasion history. It was first found in the United Kingdom in 1859, the western Baltic in Europe in 1887, the Mediterranean and eastern Europe were invaded in the 1950’s. The snail has […]

CISR: Caulerpa taxifolia

Wednesday, May 27th, 2009

The Situation: Caulerpa taxifolia is an invasive alga that is causing serious environmental problems in the Mediterranean Sea. This invasive weed was discovered in southern California and New South Wales, Australia in 2000.  Caulerpa taxifolia was officially eradicated from southern California in 2006. Caulerpa taxifolia is native in tropical waters with populations naturally occurring in […]

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Center for Invasive Species Research

Director of CISR
E-mail: mark.hoddle@ucr.edu
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E-mail: michael.lewis@ucr.edu