Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states

In the present study, we examined the variation in composition and biomass of epi-phyton growing on the bulrush Schoenoplectus californicus in a pampean lake that passed through a turbid- and a clear-water period within an annual cycle. Monthly sampling was performed year-round at the center and per...

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Detalles Bibliográficos
Autores principales:	Cano, María Gabriela, Casco, María Adela, Claps, María Cristina
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2012
Materias:	Biología Algal epiphyton Argentina Bulrush Community resilience Light climate Pampean lakes Total phosphorus
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/84113
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-84113
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Biología Algal epiphyton Argentina Bulrush Community resilience Light climate Pampean lakes Total phosphorus
spellingShingle	Biología Algal epiphyton Argentina Bulrush Community resilience Light climate Pampean lakes Total phosphorus Cano, María Gabriela Casco, María Adela Claps, María Cristina Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states
topic_facet	Biología Algal epiphyton Argentina Bulrush Community resilience Light climate Pampean lakes Total phosphorus
description	In the present study, we examined the variation in composition and biomass of epi-phyton growing on the bulrush Schoenoplectus californicus in a pampean lake that passed through a turbid- and a clear-water period within an annual cycle. Monthly sampling was performed year-round at the center and periphery of a bulrush stand. We measured the physicochem-ical parameters in the water column using standardized field and laboratory methods. The epiphy-ton was sampled by sectioning bulrush stems into segments for pigment analysis, abundance measurements, and biovolume quantification. Two different types of communities were observed during the annual cycle. In the turbid-water period, epiphyton biomass and diversity remained low despite sufficient levels of phosphates. An abrupt increase in epiphyton biomass, along with structural changes in the community, occurred after an improvement in water transparency, suggesting that the epiphyton was strongly dependent on underwater light conditions. Differences in epiphyton composition and biomass between the center and the periphery of the bulrush stand were negligible. We conclude that the availability of colonizing surface is not a relevant driver for the colonization and growth of these epiphyton assemblages. The epiphyton in pampean lakes may remain stable and resilient for relatively long periods, even when confronted with environmental perturbations, and changes in these communities will only occur in relation to radical alterations in light and nutrient availability.
format	Articulo Articulo
author	Cano, María Gabriela Casco, María Adela Claps, María Cristina
author_facet	Cano, María Gabriela Casco, María Adela Claps, María Cristina
author_sort	Cano, María Gabriela
title	Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states
title_short	Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states
title_full	Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states
title_fullStr	Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states
title_full_unstemmed	Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states
title_sort	effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states
publishDate	2012
url	http://sedici.unlp.edu.ar/handle/10915/84113
work_keys_str_mv	AT canomariagabriela effectofenvironmentalvariablesonepiphytoninapampeanlakewithstableturbidandclearwaterstates AT cascomariaadela effectofenvironmentalvariablesonepiphytoninapampeanlakewithstableturbidandclearwaterstates AT clapsmariacristina effectofenvironmentalvariablesonepiphytoninapampeanlakewithstableturbidandclearwaterstates
bdutipo_str	Repositorios
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Effect of environmental variables on epiphyton in a pampean lake with stable turbid- and clear-water states

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