NPSpecies

Specimen(s) collected during a study of coastal rock pools of Lake Superior at Isle Royale. Two shoreline zones were differentiated using a line between upslope “lichen zone” pools and downslope “splash zone” pools. See citation for details. Distribution — Wide Nearctic range, from AK to NT, Newfoundland and south to CA, NY, and broadly in the southeast including the Carolinas. Ecology — Standing or slow flowing water, including low dissolved oxygen and on many substrates, but also rivers with moderate to fast flow. Utilizes widespread habitats south of treeline, but only permanent ponds in the arctic. Also found in marine coastal rock pools above high tide line. Remarks — Very common at IRNP, clearly a habitat generalist with emergence from a wide range of pool types.