Phytoplankton dynamics in two reservoirs with different trophic state (Lake Rosamarina and Lake Arancio, Sicily, Italy)

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Abstract

Two man-made Sicilian lakes of differing trophic status were sampled weekly for a year, in order to compare their phytoplankton dynamics and to identify their driving factors. The water bodies store comparable volumes but the eutrophic Lake Arancio may be considered to be a shallow lake whereas the mesotrophic Lake Rosamarina is deep. The dynamics of their principal physical, chemical and biological features were analysed using, among others, Canonical Community Ordination. The results obtained suggest that increased nutrient availability causes an increase of phytoplankton biomass but no community change nor any alteration to the typical assemblages supported. The major influence in the more eutrophic lake was exerted by physical variates and, in particular, by the underwater light climate regime, whereas a significant influence of nutrients was observed in the mesotrophic one. Moreover, an assemblage of species able to regulate their buoyancy, or adapted to frequent dark/light cycles was characteristic of the eutrophic lake. We hypothesize that the physical characteristics of a water body and secondary modifications induced by increased nutrient availability, e.g. higher phytoplankton biomass, contraction of the euphotic depth, selective grazing, may drive the seasonal succession of phytoplankton in the upper part of the trophic spectrum.
Original languageEnglish
Pages (from-to)163-178
Number of pages16
JournalHydrobiologia
Volume369-370
Publication statusPublished - 1998

All Science Journal Classification (ASJC) codes

  • Aquatic Science

Cite this

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title = "Phytoplankton dynamics in two reservoirs with different trophic state (Lake Rosamarina and Lake Arancio, Sicily, Italy)",
abstract = "Two man-made Sicilian lakes of differing trophic status were sampled weekly for a year, in order to compare their phytoplankton dynamics and to identify their driving factors. The water bodies store comparable volumes but the eutrophic Lake Arancio may be considered to be a shallow lake whereas the mesotrophic Lake Rosamarina is deep. The dynamics of their principal physical, chemical and biological features were analysed using, among others, Canonical Community Ordination. The results obtained suggest that increased nutrient availability causes an increase of phytoplankton biomass but no community change nor any alteration to the typical assemblages supported. The major influence in the more eutrophic lake was exerted by physical variates and, in particular, by the underwater light climate regime, whereas a significant influence of nutrients was observed in the mesotrophic one. Moreover, an assemblage of species able to regulate their buoyancy, or adapted to frequent dark/light cycles was characteristic of the eutrophic lake. We hypothesize that the physical characteristics of a water body and secondary modifications induced by increased nutrient availability, e.g. higher phytoplankton biomass, contraction of the euphotic depth, selective grazing, may drive the seasonal succession of phytoplankton in the upper part of the trophic spectrum.",
author = "Rossella Barone and {Naselli Flores}, Luigi",
year = "1998",
language = "English",
volume = "369-370",
pages = "163--178",
journal = "Hydrobiologia",
issn = "0018-8158",
publisher = "Springer Netherlands",

}

TY - JOUR

T1 - Phytoplankton dynamics in two reservoirs with different trophic state (Lake Rosamarina and Lake Arancio, Sicily, Italy)

AU - Barone, Rossella

AU - Naselli Flores, Luigi

PY - 1998

Y1 - 1998

N2 - Two man-made Sicilian lakes of differing trophic status were sampled weekly for a year, in order to compare their phytoplankton dynamics and to identify their driving factors. The water bodies store comparable volumes but the eutrophic Lake Arancio may be considered to be a shallow lake whereas the mesotrophic Lake Rosamarina is deep. The dynamics of their principal physical, chemical and biological features were analysed using, among others, Canonical Community Ordination. The results obtained suggest that increased nutrient availability causes an increase of phytoplankton biomass but no community change nor any alteration to the typical assemblages supported. The major influence in the more eutrophic lake was exerted by physical variates and, in particular, by the underwater light climate regime, whereas a significant influence of nutrients was observed in the mesotrophic one. Moreover, an assemblage of species able to regulate their buoyancy, or adapted to frequent dark/light cycles was characteristic of the eutrophic lake. We hypothesize that the physical characteristics of a water body and secondary modifications induced by increased nutrient availability, e.g. higher phytoplankton biomass, contraction of the euphotic depth, selective grazing, may drive the seasonal succession of phytoplankton in the upper part of the trophic spectrum.

AB - Two man-made Sicilian lakes of differing trophic status were sampled weekly for a year, in order to compare their phytoplankton dynamics and to identify their driving factors. The water bodies store comparable volumes but the eutrophic Lake Arancio may be considered to be a shallow lake whereas the mesotrophic Lake Rosamarina is deep. The dynamics of their principal physical, chemical and biological features were analysed using, among others, Canonical Community Ordination. The results obtained suggest that increased nutrient availability causes an increase of phytoplankton biomass but no community change nor any alteration to the typical assemblages supported. The major influence in the more eutrophic lake was exerted by physical variates and, in particular, by the underwater light climate regime, whereas a significant influence of nutrients was observed in the mesotrophic one. Moreover, an assemblage of species able to regulate their buoyancy, or adapted to frequent dark/light cycles was characteristic of the eutrophic lake. We hypothesize that the physical characteristics of a water body and secondary modifications induced by increased nutrient availability, e.g. higher phytoplankton biomass, contraction of the euphotic depth, selective grazing, may drive the seasonal succession of phytoplankton in the upper part of the trophic spectrum.

UR - http://hdl.handle.net/10447/335311

UR - https://link.springer.com/article/10.1023/A:1017063708180

M3 - Article

VL - 369-370

SP - 163

EP - 178

JO - Hydrobiologia

JF - Hydrobiologia

SN - 0018-8158

ER -