Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah)
Physical, chemical and biological variables were measured in the Great Salt Lake during 1985–87, when salinity in the mixolimnion was near 50 g/L, much lower than the 250 g/L maxima recorded in 1963. Decreased salinity has been accompanied by a change in macrozooplankton from one species (Artemia fr...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , |
Other Authors: | |
Format: | Text |
Language: | unknown |
Published: |
Hosted by Utah State University Libraries
1990
|
Subjects: | |
Online Access: | https://digitalcommons.usu.edu/wats_facpub/79 https://doi.org/10.1139/f90-010 |
id |
ftutahsudc:oai:digitalcommons.usu.edu:wats_facpub-1078 |
---|---|
record_format |
openpolar |
spelling |
ftutahsudc:oai:digitalcommons.usu.edu:wats_facpub-1078 2023-07-30T04:07:31+02:00 Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah) Wurtsbaugh, Wayne A. Berry, T. S. National Research Council Canada 1990-01-01T08:00:00Z https://digitalcommons.usu.edu/wats_facpub/79 https://doi.org/10.1139/f90-010 unknown Hosted by Utah State University Libraries https://digitalcommons.usu.edu/wats_facpub/79 doi:10.1139/f90-010 https://doi.org/10.1139/f90-010 Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. Watershed Sciences Faculty Publications cascading effects decreased salinity plankton chemistry physics Great Salt Lake Utah Aquaculture and Fisheries Environmental Sciences Water Resource Management text 1990 ftutahsudc https://doi.org/10.1139/f90-010 2023-07-13T17:35:11Z Physical, chemical and biological variables were measured in the Great Salt Lake during 1985–87, when salinity in the mixolimnion was near 50 g/L, much lower than the 250 g/L maxima recorded in 1963. Decreased salinity has been accompanied by a change in macrozooplankton from one species (Artemia franciscana), to an assemblage with one rotifer, two copepods, Artemia, and the corixid Trichocorixa verticalis. Predation by the corixid may now limit Artemia to low densities (<100∙m−3). The low biomass of Artemia and other zooplankton has reduced grazing pressure on the algal community so that high chlorophyll levels (5-44 mg∙m−3) and low Secchi depths (0.8–2.7 m) are now present throughout the year. The algae presently reduce soluble reactive phosphorus and inorganic nitrogen in the mixolimnion to below 5 and 50 μg∙L−1, respectively. Shading in the 7-m thick mixolimnion by algae, and by purple-sulfur bacteria in the chemocline, decreases light penetration so that the monimolimnion now maintains a nearly constant temperature (9–11 °C) throughout the year. The data support the hypothesis that the effects of corixid predation have cascaded through the Great Salt Lake, affecting herbivores, nutrients and thermal stratification. Text Copepods Rotifer Utah State University: DigitalCommons@USU Canadian Journal of Fisheries and Aquatic Sciences 47 1 100 109 |
institution |
Open Polar |
collection |
Utah State University: DigitalCommons@USU |
op_collection_id |
ftutahsudc |
language |
unknown |
topic |
cascading effects decreased salinity plankton chemistry physics Great Salt Lake Utah Aquaculture and Fisheries Environmental Sciences Water Resource Management |
spellingShingle |
cascading effects decreased salinity plankton chemistry physics Great Salt Lake Utah Aquaculture and Fisheries Environmental Sciences Water Resource Management Wurtsbaugh, Wayne A. Berry, T. S. Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah) |
topic_facet |
cascading effects decreased salinity plankton chemistry physics Great Salt Lake Utah Aquaculture and Fisheries Environmental Sciences Water Resource Management |
description |
Physical, chemical and biological variables were measured in the Great Salt Lake during 1985–87, when salinity in the mixolimnion was near 50 g/L, much lower than the 250 g/L maxima recorded in 1963. Decreased salinity has been accompanied by a change in macrozooplankton from one species (Artemia franciscana), to an assemblage with one rotifer, two copepods, Artemia, and the corixid Trichocorixa verticalis. Predation by the corixid may now limit Artemia to low densities (<100∙m−3). The low biomass of Artemia and other zooplankton has reduced grazing pressure on the algal community so that high chlorophyll levels (5-44 mg∙m−3) and low Secchi depths (0.8–2.7 m) are now present throughout the year. The algae presently reduce soluble reactive phosphorus and inorganic nitrogen in the mixolimnion to below 5 and 50 μg∙L−1, respectively. Shading in the 7-m thick mixolimnion by algae, and by purple-sulfur bacteria in the chemocline, decreases light penetration so that the monimolimnion now maintains a nearly constant temperature (9–11 °C) throughout the year. The data support the hypothesis that the effects of corixid predation have cascaded through the Great Salt Lake, affecting herbivores, nutrients and thermal stratification. |
author2 |
National Research Council Canada |
format |
Text |
author |
Wurtsbaugh, Wayne A. Berry, T. S. |
author_facet |
Wurtsbaugh, Wayne A. Berry, T. S. |
author_sort |
Wurtsbaugh, Wayne A. |
title |
Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah) |
title_short |
Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah) |
title_full |
Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah) |
title_fullStr |
Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah) |
title_full_unstemmed |
Cascading Effects of Decreased Salinity on the Plankton Chemistry, and Physics of the Great Salt Lake (Utah) |
title_sort |
cascading effects of decreased salinity on the plankton chemistry, and physics of the great salt lake (utah) |
publisher |
Hosted by Utah State University Libraries |
publishDate |
1990 |
url |
https://digitalcommons.usu.edu/wats_facpub/79 https://doi.org/10.1139/f90-010 |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
Watershed Sciences Faculty Publications |
op_relation |
https://digitalcommons.usu.edu/wats_facpub/79 doi:10.1139/f90-010 https://doi.org/10.1139/f90-010 |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. |
op_doi |
https://doi.org/10.1139/f90-010 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
47 |
container_issue |
1 |
container_start_page |
100 |
op_container_end_page |
109 |
_version_ |
1772820911098953728 |