On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline

Medusa blooms are a scarcely known phenomenon. For temperate, southwestern Atlantic waters, reports of such events are almost nonexistent. This research reports the analysis of a total of 1043 plankton samples taken from 1993 to 2006 and benthic samples collected by seasonal SCUBA diving since 1997...

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Autores principales:	Genzano,Gabriel, Mianzan,Hermes, Diaz-Briz,Luciana, Rodríguez,Carolina
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2008
Materias:	Cnidaria Hydrozoa Leptomedusae bloom Buenos Aires coast southwestern Atlantic Ocean
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2008000200011
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spelling	oai:scielo:S0718-560X20080002000112009-01-23On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shorelineGenzano,GabrielMianzan,HermesDiaz-Briz,LucianaRodríguez,Carolina Cnidaria Hydrozoa Leptomedusae bloom Buenos Aires coast southwestern Atlantic Ocean Medusa blooms are a scarcely known phenomenon. For temperate, southwestern Atlantic waters, reports of such events are almost nonexistent. This research reports the analysis of a total of 1043 plankton samples taken from 1993 to 2006 and benthic samples collected by seasonal SCUBA diving since 1997 along the Buenos Aires coast. The medusa Obelia longissima was observed in very low densities and frequen-cies, except in October 2003, when a bloom of this species was detected. Soon afterward, two consecutive massive accumulations of O. longissima and Amphisbetia operculata colonies were detected on the coast by the mhabitants of Mar del Plata (38°00'S-57°32'W) and the coastal Mar Chiquita Lagoon (37°32'S-57°19'W) between March and April 2004. The colonies of both species were collected from the shoreline at low tide at both sites. The environmental factors of that period seemed to be particularly appropriate for promoting optimum growth conditions for these hydroid species. This paper reports and describes the mentioned abnormal phe-nomena, providing baseline information on these little-understood events.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.36 n.2 20082008-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2008000200011en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Cnidaria Hydrozoa Leptomedusae bloom Buenos Aires coast southwestern Atlantic Ocean
spellingShingle	Cnidaria Hydrozoa Leptomedusae bloom Buenos Aires coast southwestern Atlantic Ocean Genzano,Gabriel Mianzan,Hermes Diaz-Briz,Luciana Rodríguez,Carolina On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline
description	Medusa blooms are a scarcely known phenomenon. For temperate, southwestern Atlantic waters, reports of such events are almost nonexistent. This research reports the analysis of a total of 1043 plankton samples taken from 1993 to 2006 and benthic samples collected by seasonal SCUBA diving since 1997 along the Buenos Aires coast. The medusa Obelia longissima was observed in very low densities and frequen-cies, except in October 2003, when a bloom of this species was detected. Soon afterward, two consecutive massive accumulations of O. longissima and Amphisbetia operculata colonies were detected on the coast by the mhabitants of Mar del Plata (38°00'S-57°32'W) and the coastal Mar Chiquita Lagoon (37°32'S-57°19'W) between March and April 2004. The colonies of both species were collected from the shoreline at low tide at both sites. The environmental factors of that period seemed to be particularly appropriate for promoting optimum growth conditions for these hydroid species. This paper reports and describes the mentioned abnormal phe-nomena, providing baseline information on these little-understood events.
author	Genzano,Gabriel Mianzan,Hermes Diaz-Briz,Luciana Rodríguez,Carolina
author_facet	Genzano,Gabriel Mianzan,Hermes Diaz-Briz,Luciana Rodríguez,Carolina
author_sort	Genzano,Gabriel
title	On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline
title_short	On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline
title_full	On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline
title_fullStr	On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline
title_full_unstemmed	On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline
title_sort	on the occurrence of obelia medusa blooms and empirical evidence of unusual massive accumulations of obelia and amphisbetia hydroids on the argentina shoreline
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2008000200011
work_keys_str_mv	AT genzanogabriel ontheoccurrenceofobeliamedusabloomsandempiricalevidenceofunusualmassiveaccumulationsofobeliaandamphisbetiahydroidsontheargentinashoreline AT mianzanhermes ontheoccurrenceofobeliamedusabloomsandempiricalevidenceofunusualmassiveaccumulationsofobeliaandamphisbetiahydroidsontheargentinashoreline AT diazbrizluciana ontheoccurrenceofobeliamedusabloomsandempiricalevidenceofunusualmassiveaccumulationsofobeliaandamphisbetiahydroidsontheargentinashoreline AT rodriguezcarolina ontheoccurrenceofobeliamedusabloomsandempiricalevidenceofunusualmassiveaccumulationsofobeliaandamphisbetiahydroidsontheargentinashoreline
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On the occurrence of Obelia medusa blooms and empirical evidence of unusual massive accumulations of Obelia and Amphisbetia hydroids on the Argentina shoreline

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