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Egg banks in hypersaline lakes of the South-East Europe.

Moscatello S, Belmonte G - Saline Syst. (2009)

Bottom Line: The study concerned the bottom sediments of Khersonesskoe and Koyashskoe lakes in the Crimea (Ukraine), Nartë saltworks (Albania), Vecchia Salina at Torre Colimena (Apulia, Italy), Pantano Grande and Pantano Roveto at Vendicari (Sicily, Italy).The cyst banks of lakes were found to be well separated in the representation derived from a statistical multivariate data analysis.The cyst banks contained more species than those recorded over a multi-year sampling effort in the water column.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy. salvatore.moscatello@virgilio.it

ABSTRACT
The cyst banks of 6 coastal hypersaline lakes of South-East Europe have been investigated. The study concerned the bottom sediments of Khersonesskoe and Koyashskoe lakes in the Crimea (Ukraine), Nartë saltworks (Albania), Vecchia Salina at Torre Colimena (Apulia, Italy), Pantano Grande and Pantano Roveto at Vendicari (Sicily, Italy). A total of 19 cyst types were recognised. The cyst banks of lakes were found to be well separated in the representation derived from a statistical multivariate data analysis. For all the lakes examined a comparison was possible between the resting community in sediments (cyst bank) and the active one in the water. The cyst banks contained more species than those recorded over a multi-year sampling effort in the water column. The study of cyst hatching, performed on 5 cyst types under lab conditions, demonstrated that cysts do not hatch under the same conditions. Furthermore, each cyst type shows a wide range of preferential hatching conditions, which allow us to confirm the ecological generalism of salt lake species.

No MeSH data available.


Related in: MedlinePlus

Resting stages (cysts) of plankton organisms collected in the sediment of the studied hypersaline lakes. In some groups the outer sculpturing may help in taxon identification: a) resting eggs of large branchiopods (a1 Phallocryptus spinosa; a2 Artemia parthenogenetica) (range 200–400 μm); b) ephippium of anomopod cladocerans (Moina salina) holding one resting egg (range 0,5–1 mm); c) types of spherical resting eggs in calanoid copepods (range 80–200 μm); d) types of monogonont rotifers resting eggs (d2 Hexarthra fennica; d3 Brachionus sp.; d4 Ptygura sp.)(range 80–200 μm); (e) flask-shaped cyst in ciliates (Fabrea salina) (range 80–200 μm); f) undetermined spherical resting eggs (range 80–200 μm); g) type of spherical resting eggs in turbellarians (range 80–200 μm).
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Figure 1: Resting stages (cysts) of plankton organisms collected in the sediment of the studied hypersaline lakes. In some groups the outer sculpturing may help in taxon identification: a) resting eggs of large branchiopods (a1 Phallocryptus spinosa; a2 Artemia parthenogenetica) (range 200–400 μm); b) ephippium of anomopod cladocerans (Moina salina) holding one resting egg (range 0,5–1 mm); c) types of spherical resting eggs in calanoid copepods (range 80–200 μm); d) types of monogonont rotifers resting eggs (d2 Hexarthra fennica; d3 Brachionus sp.; d4 Ptygura sp.)(range 80–200 μm); (e) flask-shaped cyst in ciliates (Fabrea salina) (range 80–200 μm); f) undetermined spherical resting eggs (range 80–200 μm); g) type of spherical resting eggs in turbellarians (range 80–200 μm).

Mentions: A total of 19 cyst morphotypes were found (only 13 are given in Figure 1) in the 6 hypersaline lakes studied. Seven of them have been identified at the genus level, also due to the successful hatching experiments carried out in laboratory conditions. On the average, the number of cyst morphotypes extracted from the sediment cores was more than double the number of the active organisms found in the plankton over the study time [see Additional file 1]. The richest cyst bank was that of Vecchia Salina (17 morphotypes), and the poorest was that of lake Koyashskoe (5 morphotypes).


Egg banks in hypersaline lakes of the South-East Europe.

Moscatello S, Belmonte G - Saline Syst. (2009)

Resting stages (cysts) of plankton organisms collected in the sediment of the studied hypersaline lakes. In some groups the outer sculpturing may help in taxon identification: a) resting eggs of large branchiopods (a1 Phallocryptus spinosa; a2 Artemia parthenogenetica) (range 200–400 μm); b) ephippium of anomopod cladocerans (Moina salina) holding one resting egg (range 0,5–1 mm); c) types of spherical resting eggs in calanoid copepods (range 80–200 μm); d) types of monogonont rotifers resting eggs (d2 Hexarthra fennica; d3 Brachionus sp.; d4 Ptygura sp.)(range 80–200 μm); (e) flask-shaped cyst in ciliates (Fabrea salina) (range 80–200 μm); f) undetermined spherical resting eggs (range 80–200 μm); g) type of spherical resting eggs in turbellarians (range 80–200 μm).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2662865&req=5

Figure 1: Resting stages (cysts) of plankton organisms collected in the sediment of the studied hypersaline lakes. In some groups the outer sculpturing may help in taxon identification: a) resting eggs of large branchiopods (a1 Phallocryptus spinosa; a2 Artemia parthenogenetica) (range 200–400 μm); b) ephippium of anomopod cladocerans (Moina salina) holding one resting egg (range 0,5–1 mm); c) types of spherical resting eggs in calanoid copepods (range 80–200 μm); d) types of monogonont rotifers resting eggs (d2 Hexarthra fennica; d3 Brachionus sp.; d4 Ptygura sp.)(range 80–200 μm); (e) flask-shaped cyst in ciliates (Fabrea salina) (range 80–200 μm); f) undetermined spherical resting eggs (range 80–200 μm); g) type of spherical resting eggs in turbellarians (range 80–200 μm).
Mentions: A total of 19 cyst morphotypes were found (only 13 are given in Figure 1) in the 6 hypersaline lakes studied. Seven of them have been identified at the genus level, also due to the successful hatching experiments carried out in laboratory conditions. On the average, the number of cyst morphotypes extracted from the sediment cores was more than double the number of the active organisms found in the plankton over the study time [see Additional file 1]. The richest cyst bank was that of Vecchia Salina (17 morphotypes), and the poorest was that of lake Koyashskoe (5 morphotypes).

Bottom Line: The study concerned the bottom sediments of Khersonesskoe and Koyashskoe lakes in the Crimea (Ukraine), Nartë saltworks (Albania), Vecchia Salina at Torre Colimena (Apulia, Italy), Pantano Grande and Pantano Roveto at Vendicari (Sicily, Italy).The cyst banks of lakes were found to be well separated in the representation derived from a statistical multivariate data analysis.The cyst banks contained more species than those recorded over a multi-year sampling effort in the water column.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy. salvatore.moscatello@virgilio.it

ABSTRACT
The cyst banks of 6 coastal hypersaline lakes of South-East Europe have been investigated. The study concerned the bottom sediments of Khersonesskoe and Koyashskoe lakes in the Crimea (Ukraine), Nartë saltworks (Albania), Vecchia Salina at Torre Colimena (Apulia, Italy), Pantano Grande and Pantano Roveto at Vendicari (Sicily, Italy). A total of 19 cyst types were recognised. The cyst banks of lakes were found to be well separated in the representation derived from a statistical multivariate data analysis. For all the lakes examined a comparison was possible between the resting community in sediments (cyst bank) and the active one in the water. The cyst banks contained more species than those recorded over a multi-year sampling effort in the water column. The study of cyst hatching, performed on 5 cyst types under lab conditions, demonstrated that cysts do not hatch under the same conditions. Furthermore, each cyst type shows a wide range of preferential hatching conditions, which allow us to confirm the ecological generalism of salt lake species.

No MeSH data available.


Related in: MedlinePlus