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Morphological plasticity of dominant species in response to nutrients dynamics in Bidighinzu reservoir of Sardinia, Italy

Aktan, Yelda and Lugliè, Antonella Gesuina Laura and Sechi, Nicola (2009) Morphological plasticity of dominant species in response to nutrients dynamics in Bidighinzu reservoir of Sardinia, Italy. Turkish Journal of Fisheries and Aquatic Sciences, Vol. 9 (2), p. 137-144. ISSN 1303-2712. Article.

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DOI: 10.4194/trjfas.2009.0203

Abstract

The aim of this study was to describe the effect of environmental factors on the variation in population structure of phytoplankton in a hypertrophic reservoir and to analyse the size variability of dominant species, and finally to try to find a linkage between environmental factors and phytoplankton size structure. Species composition and dynamics of phytoplankton were typical of highly trophic conditions and were frequently characterized by the dominance of cyanobacteria, Microcystis, Anabaena, Aphanizomenon. Some environmental parameters play an important role in determining the phytoplankton community succession and their size structure, favoring or limiting the growth of the different groups of the phytoplankton. The results indicate that, overall nutrient concentrations in Bidighinzu Lake were not limiting the phytoplankton growth in general. On the contrary, concentrations of nutrient were always above the required levels for phytoplankton growth. The results show that phytoplankton community succession and their seasonal variability of size structure (consequently cell surface area, cell volume and surface area to volume ratio) were mostly influenced by the temperature and nutrients. However, these affecting factors (especially nutrients) on seasonal variability of size structure of common species in Lake Bidighinzu showed difference among the species.

Item Type:Article
ID Code:4704
Status:Published
Refereed:Yes
Uncontrolled Keywords:Phytoplankton, surface-volume ratio, C-R-S strategies, environmental factor
Subjects:Area 05 - Scienze biologiche > BIO/07 Ecologia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Central Fisheries Research Institute
ISSN:1303-2712
Copyright Holders:© Central Fisheries Research Institute (CFRI) Trabzon, Turkey and Japan International Cooperation Agency (JICA)
Deposited On:18 Oct 2010 16:09

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