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Desiccation and recolonization of phytobenthos in a regulated desert river: Colorado River at Lees Ferry, Arizona, USA

We tested the recolonization of the phytobenthic community in the tailwaters of Glen Canyon Dam following long‐ and short‐term experimentally induced desiccation. The response of Cladophora glomerata, Oscillatoria spp., miscellaneous phytobenthos species and periphyton was studied over 18 weeks usin...

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Bibliographic Details
Published in:Regulated rivers 1998-11, Vol.14 (6), p.519-532
Main Authors: Benenati, Peggy L., Shannon, Joseph P., Blinn, Dean W.
Format: Article
Language:English
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Summary:We tested the recolonization of the phytobenthic community in the tailwaters of Glen Canyon Dam following long‐ and short‐term experimentally induced desiccation. The response of Cladophora glomerata, Oscillatoria spp., miscellaneous phytobenthos species and periphyton was studied over 18 weeks using three treatments: (1) undisturbed control cobbles from the submerged zone; (2) cobbles desiccated and replaced into the submerged zone; and (3) cobbles desiccated and replaced into the varial zone. Periphyton density and compositional response resulting from these treatments were also examined. Desiccation treatments were significantly different in biomass from controls throughout the study. The biomass of desiccated and replaced river cobbles averaged
ISSN:0886-9375
1099-1646
DOI:10.1002/(SICI)1099-1646(1998110)14:6<519::AID-RRR518>3.0.CO;2-H