publication . Other literature type . 2009

Historical abundance and morphology of Didymosphenia species in Naknek Lake, Alaska

Pite, Danielle P.; Lane, Kelly A.; Hermann, Anna K.; Spaulding, Sarah A.; Finney, Bruce P.;
Open Access English
  • Published: 01 Jan 2009 Journal: Acta Botanica Croatica, volume 68, issue 2 (issn: 0365-0588, eissn: 1847-8476, Copyright policy)
  • Publisher: Division of Biology, Faculty of Science, University of Zagreb
Since the 1980s, nuisance blooms of Didymosphenia geminata (Lyngbye) M. Schmidt have been documented in sites that are warmer and more mesotrophic than historical records indicate. While the invasion of D. geminata in New Zealand is well documented, it is less clear whether nuisance blooms in North America are a new phenomenon. In order to test the hypothesis that D. geminata blooms have increased in recent years, we examined the historical record of this species in sediments of Naknek Lake, in Katmai National Park, Alaska. Chronological control was established by relating the presence of two ash layers to known volcanic eruptions. We identified two species of D...
free text keywords: diatom; Didymosphenia geminata; Didymosphenia clavaherculis; morphology; counting; bloom; stream; lake; invasion; history; Alaska
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