TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.

The lentic water system formed by the West and East Okoboji lakes and the Big Spirit lake was sampled in four stations spread through the Okoboji lacustrine system on October 9th, 1994. In these samples were determined chemical and biological parameters as depth, Secchis depth, temperature, pH, dis...

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Autor principal:	Campos Ortega,Humberto
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2007
Materias:	Trophic status glacial lakes zooplankton
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292007000300002
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spelling	oai:scielo:S0718-342920070003000022008-01-31TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.Campos Ortega,Humberto Trophic status glacial lakes zooplankton The lentic water system formed by the West and East Okoboji lakes and the Big Spirit lake was sampled in four stations spread through the Okoboji lacustrine system on October 9th, 1994. In these samples were determined chemical and biological parameters as depth, Secchis depth, temperature, pH, dissolved oxygen, electrical conductivity. The content of chlorophyll A between both lakes was also studied, including a comparison in zooplankton. In contrast with the shallow stations, in the deepest stations it was observed stratification due to the presence of thermoclyne and oxiclyne. For the comparison of chlorophyll between both Okoboji lakes, a one-way ANOVA test was applied. Results showed that there were statistically significant differences at 2-meter depth among the stations in both lakes but not in surface waters. Later, a Duncan Multiple Range test was performed to examine the nature of these differences. It showed that only Station SP in East Okoboji differed from the other three with respect to chlorophyll A. The zooplankton comparison showed no differences either in the presence of cladocerans calanoyds and ciclopoyds, or in the total amount of zooplankton. The behavior among the stations only showed statistically significant differences in ciclopoyds.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.25 n.3 20072007-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292007000300002en10.4067/S0718-34292007000300002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Trophic status glacial lakes zooplankton
spellingShingle	Trophic status glacial lakes zooplankton Campos Ortega,Humberto TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.
description	The lentic water system formed by the West and East Okoboji lakes and the Big Spirit lake was sampled in four stations spread through the Okoboji lacustrine system on October 9th, 1994. In these samples were determined chemical and biological parameters as depth, Secchis depth, temperature, pH, dissolved oxygen, electrical conductivity. The content of chlorophyll A between both lakes was also studied, including a comparison in zooplankton. In contrast with the shallow stations, in the deepest stations it was observed stratification due to the presence of thermoclyne and oxiclyne. For the comparison of chlorophyll between both Okoboji lakes, a one-way ANOVA test was applied. Results showed that there were statistically significant differences at 2-meter depth among the stations in both lakes but not in surface waters. Later, a Duncan Multiple Range test was performed to examine the nature of these differences. It showed that only Station SP in East Okoboji differed from the other three with respect to chlorophyll A. The zooplankton comparison showed no differences either in the presence of cladocerans calanoyds and ciclopoyds, or in the total amount of zooplankton. The behavior among the stations only showed statistically significant differences in ciclopoyds.
author	Campos Ortega,Humberto
author_facet	Campos Ortega,Humberto
author_sort	Campos Ortega,Humberto
title	TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.
title_short	TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.
title_full	TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.
title_fullStr	TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.
title_full_unstemmed	TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.
title_sort	trophic status of two glacial lakes, west and east okoboji, in northwest iowa. u.s.a.
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292007000300002
work_keys_str_mv	AT camposortegahumberto trophicstatusoftwoglaciallakeswestandeastokobojiinnorthwestiowausa
_version_	1714203646790467584

TROPHIC STATUS OF TWO GLACIAL LAKES, WEST AND EAST OKOBOJI, IN NORTHWEST IOWA. U.S.A.

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