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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

Best hatching patterns of some resting stages submitted to laboratory controlled conditions: a) Fabrea salina cysts; b) Hexarthra fennica eggs; c) Brachionus sp. eggs; d) Artemia parthenogenetica eggs; e) Moina salina ephippia. The values reported on the x-axis correspond to the storage time (in days); the y-axis represents the hatching percentages.
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Figure 4: Best hatching patterns of some resting stages submitted to laboratory controlled conditions: a) Fabrea salina cysts; b) Hexarthra fennica eggs; c) Brachionus sp. eggs; d) Artemia parthenogenetica eggs; e) Moina salina ephippia. The values reported on the x-axis correspond to the storage time (in days); the y-axis represents the hatching percentages.

Mentions: Laboratory experiments under controlled conditions let us to estimate the hatching success of some species (Figure 4). In Fabrea salina (Ciliophora) 100% of hatching was obtained in equinox conditions (12 h light, 12 h dark; at a salinity of 46‰ after 1 week). In Hexarthra fennica (Rotifera) the maximum hatching (93%) was obtained in summer light conditions (14 h light; 10 h dark; at a salinity of 46‰ after 2 weeks). In Brachionus sp. (Rotifera) a hatching peak (66,7%) occurred after 3 days at a salinity of 46‰, under summer light conditions. Artemia sp. (Crustacea Anostraca) showed the maximum hatching-rate under summer conditions (67% at a salinity of 36‰ after 3 days). Moina salina (Crustacea Cladocera) showed an hatching peak (70%) occurring at a salinity of 26‰ after 2 weeks, in summer light conditions.


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

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

Best hatching patterns of some resting stages submitted to laboratory controlled conditions: a) Fabrea salina cysts; b) Hexarthra fennica eggs; c) Brachionus sp. eggs; d) Artemia parthenogenetica eggs; e) Moina salina ephippia. The values reported on the x-axis correspond to the storage time (in days); the y-axis represents the hatching percentages.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 4: Best hatching patterns of some resting stages submitted to laboratory controlled conditions: a) Fabrea salina cysts; b) Hexarthra fennica eggs; c) Brachionus sp. eggs; d) Artemia parthenogenetica eggs; e) Moina salina ephippia. The values reported on the x-axis correspond to the storage time (in days); the y-axis represents the hatching percentages.
Mentions: Laboratory experiments under controlled conditions let us to estimate the hatching success of some species (Figure 4). In Fabrea salina (Ciliophora) 100% of hatching was obtained in equinox conditions (12 h light, 12 h dark; at a salinity of 46‰ after 1 week). In Hexarthra fennica (Rotifera) the maximum hatching (93%) was obtained in summer light conditions (14 h light; 10 h dark; at a salinity of 46‰ after 2 weeks). In Brachionus sp. (Rotifera) a hatching peak (66,7%) occurred after 3 days at a salinity of 46‰, under summer light conditions. Artemia sp. (Crustacea Anostraca) showed the maximum hatching-rate under summer conditions (67% at a salinity of 36‰ after 3 days). Moina salina (Crustacea Cladocera) showed an hatching peak (70%) occurring at a salinity of 26‰ after 2 weeks, in summer light conditions.

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