An inventory of the algae (excluding diatoms) of lakes and ponds of Harriman and Bear Mountain State Parks (Rockland and Orange Counties, New York, USA)

摘要

Harriman and Bear Mountain State Parks, New York, contain a rich and previously under-documented algal flora. We report 382 algal taxa (excluding diatoms), including 294 taxa not previously reported from the parks. Our inventory suggests that the algal flora has changed significantly since it was last studied in 1918 with a general increase in the number of desmid taxa (Zygnematophyceae) and changes in the species composition of other green algae. We hypothesize that these changes are primarily due to normal succession in constructed lakes. Some of the species encountered are infrequently reported from North America. Consequently Harriman and Bear Mountain State Parks represents an important locality for their study. Factors possibly contributing to the apparent rarity of species are discussed. A new species of Dinobryon (Chrysophyceae: Dinobryaceae) is described: Dinobryon sertularioides. Two new taxonomic combinations are also made: Stauridium tetras var. tetraodon (Chlorophyceae: Hydrodictyaceae) and Cosmarium verrucosum var. alatum (Zygnematophyceae: Desmidiaceae).