Invasive Species Compendium - Didymosphenia geminata
New York Invasive Species Information - Rock Snot, Didymo
New York Invasive Species Clearinghouse.
NEANS Panel Online Guide - Didymo (a.k.a. rock snot)
Northeast Aquatic Nuisance Species Panel.
Global Invasive Species Database - Didymosphenia
IUCN. Species Survival Commission. Invasive Species Specialist Group.
Yosemite National Park - Invasive Species: Didymo a.k.a. "Rock Snot" (Mar 2017; PDF | 192 KB)
DOI. National Park Service.
See also: Environmental Factors - Invasive Species for more information
Biodiversity and Pest Control - Didymo
Otago Regional Council (New Zealand).
Aquatic Invasive Species: Rock Snot (Didymo/Cymbella) Risk Analysis for Arizona (Jul 2010; PDF | 178 KB)
Arizona Game and Fish Department.
See also: Aquatic Invasive Species for
additional risk analyses and related species information
Nuisance Species Threatens Maine Streams and
Rivers: Didymo or "Rock Snot"
Maine Department of Environmental Protection.
Nuisance & Invasive Species - Didymo (Rock Snot)
New York Department of Environmental Conservation.
Invasive Plants in Pennsylvania: Didymo (PDF | 153 KB)
Pennsylvania Department of Conservation and Natural Resources.
See also: Invasive Plant Fact Sheets for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands
AIS Action Plan: Didymo (Jun 2011; PDF | 193 KB)
Pennsylvania Fish and Boat Commission.
See also: Aquatic Invasive Species for more action plans
Didymo (Invasive Freshwater
Algae) in Virginia
Virginia Department of Game and Inland Fisheries.
(Rock Snot) Fact Sheet
West Virginia Department of Natural Resources.
Didymo (or Rock Snot)
University of California - Riverside. Center for Invasive Species Research.
How Didymo Became Rock Snot (Dec 2009)
University of Minnesota. Minnesota Sea Grant. Seiche Newsletter.
Pennsylvania State University. Pennsylvania Sea Grant.
See also: Aquatic Invasive Species: Resources for additional species information