Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado

Eutrophic temperate and sub-tropical lakes often exhibit a marked vertical structure during the warm season that involves important spatial differences of physical, chemical and biological variables. Therefore, zooplankton is exposed to a highly heterogeneous environment in the vertical dimension. I...

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Autores principales:	RAMOS-JILIBERTO,RODRIGO, ZÚÑIGA,LUIS R.
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2001
Materias:	Chile Daphnia depth-selection diel vertical migration zooplankton
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000300007
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spelling	oai:scielo:S0716-078X20010003000072002-06-13Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El PlateadoRAMOS-JILIBERTO,RODRIGOZÚÑIGA,LUIS R. Chile Daphnia depth-selection diel vertical migration zooplankton Eutrophic temperate and sub-tropical lakes often exhibit a marked vertical structure during the warm season that involves important spatial differences of physical, chemical and biological variables. Therefore, zooplankton is exposed to a highly heterogeneous environment in the vertical dimension. In this work, We analyze the depth-distribution of the cladoceran Daphnia ambigua in the eutrophic, monomictic lake El Plateado at midday and midnight, along with its relationship with the vertical distribution of water temperature and dissolved oxygen concentration. We also attempt to define whether or not this population exhibits a diel vertical migration. The results show significant changes in the day/night vertical distribution of D. ambigua during its growing season, with the exception of the last date. Also, the data revealed that average depth selected by D. ambigua becomes shallower with time, and the amplitude of the vertical migration decreases throughout the season. During the period of lake stratification, temperature appears positively correlated, and oxygen negatively correlated to the frequency of D. ambigua. It is suggested that oxygen concentration plays a crucial role in modulating the vertical migration behavior of D. ambigua in lake El Plateado, which has important consequences for understanding the atypical pattern of population dynamics exhibited by this speciesinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.74 n.3 20012001-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000300007en10.4067/S0716-078X2001000300007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chile Daphnia depth-selection diel vertical migration zooplankton
spellingShingle	Chile Daphnia depth-selection diel vertical migration zooplankton RAMOS-JILIBERTO,RODRIGO ZÚÑIGA,LUIS R. Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado
description	Eutrophic temperate and sub-tropical lakes often exhibit a marked vertical structure during the warm season that involves important spatial differences of physical, chemical and biological variables. Therefore, zooplankton is exposed to a highly heterogeneous environment in the vertical dimension. In this work, We analyze the depth-distribution of the cladoceran Daphnia ambigua in the eutrophic, monomictic lake El Plateado at midday and midnight, along with its relationship with the vertical distribution of water temperature and dissolved oxygen concentration. We also attempt to define whether or not this population exhibits a diel vertical migration. The results show significant changes in the day/night vertical distribution of D. ambigua during its growing season, with the exception of the last date. Also, the data revealed that average depth selected by D. ambigua becomes shallower with time, and the amplitude of the vertical migration decreases throughout the season. During the period of lake stratification, temperature appears positively correlated, and oxygen negatively correlated to the frequency of D. ambigua. It is suggested that oxygen concentration plays a crucial role in modulating the vertical migration behavior of D. ambigua in lake El Plateado, which has important consequences for understanding the atypical pattern of population dynamics exhibited by this species
author	RAMOS-JILIBERTO,RODRIGO ZÚÑIGA,LUIS R.
author_facet	RAMOS-JILIBERTO,RODRIGO ZÚÑIGA,LUIS R.
author_sort	RAMOS-JILIBERTO,RODRIGO
title	Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado
title_short	Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado
title_full	Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado
title_fullStr	Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado
title_full_unstemmed	Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado
title_sort	depth-selection patterns and diel vertical migration of daphnia ambigua (crustacea: cladocera) in lake el plateado
publisher	Sociedad de Biología de Chile
publishDate	2001
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000300007
work_keys_str_mv	AT ramosjilibertorodrigo depthselectionpatternsanddielverticalmigrationofdaphniaambiguacrustaceacladocerainlakeelplateado AT zunigaluisr depthselectionpatternsanddielverticalmigrationofdaphniaambiguacrustaceacladocerainlakeelplateado
_version_	1718439510321135616

Depth-selection patterns and diel vertical migration of Daphnia ambigua (Crustacea: Cladocera) in lake El Plateado

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