Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Phytoplankton assemblages in coastal waters of the northern Ionian Sea (eastern Mediterranean), with special reference to cyanobacteria |
| Abstract | Sampling cruises were carried out on three coastal stations of the Northern Ionian Sea over one year to investigate the effects of environmental factors on phytoplankton and picophytoplankton composition and succession. Larger phytoplankton (micro and nano fractions) was determined by using the Utermöhl settling technique, while picophytoplankton fraction by epifluorescence microscopy. Furthermore, microbiological procedures were applied to investigate cyanobacterial diversity in the studied area. Results evidenced that the most striking feature of phytoplankton communities was the high spatial variability in terms of abundance and biomass, which showed specific coastal Mediterranean values. Undetermined phytoflagellates and diatoms were the dominant groups of the Utermöhl fraction of phytoplankton, while round to rod-shaped small sized cyanobacteria represented the picophytoplankton fraction. Our data evidenced that in Northern Ionian Sea the phytoplankton development was related to phosphorus availability and to nitrogen-rich waters. Also the picophytoplankton seasonal trend was significantly correlated to N-compounds as well as to water temperature. In addition to the typical picoplanktonic Synechococcus, the culture techniques allowed us to isolate and identify cyanobacteria belonging to the pleurocapsalean genus Stanieria and the oscillatoriacean genera Geitlerinema, Leiblenia, Leptolyngbya, Oscillatoria, Pseudanabaena and Spirulina. These species represent a minor fraction of the total cyanobacterial community in terms of biomass, but their importance is related to their contribution to the phytoplankton diversity. |
| Source | Journal of the Marine Biological Association of the United Kingdom (Print) 86, pp. 927–937 |
| Keywords | PhytoplanktonCyanobacteriaEcologyTaxonomyIonian Sea |
| Journal | Journal of the Marine Biological Association of the United Kingdom (Print) |
| Editor | Marine Biological Association of the United Kingdom,, Cambridge, Regno Unito |
| Year | 2006 |
| Type | Articolo in rivista |
| DOI | 10.1017/S0025315406013889 |
| Authors | Caroppo C., Turicchia S., Margheri M.C. |
| Text | 166932 2006 10.1017/S0025315406013889 ISI Web of Science WOS 000241311000001 Phytoplankton Cyanobacteria Ecology Taxonomy Ionian Sea Phytoplankton assemblages in coastal waters of the northern Ionian Sea eastern Mediterranean , with special reference to cyanobacteria Caroppo C., Turicchia S., Margheri M.C. Istituto Ambiente Marino Costiero, Sede di Taranto CNR Istituto per lo Studio degli Ecosistemi, Sede di Firenze CNR Sampling cruises were carried out on three coastal stations of the Northern Ionian Sea over one year to investigate the effects of environmental factors on phytoplankton and picophytoplankton composition and succession. Larger phytoplankton micro and nano fractions was determined by using the Utermohl settling technique, while picophytoplankton fraction by epifluorescence microscopy. Furthermore, microbiological procedures were applied to investigate cyanobacterial diversity in the studied area. Results evidenced that the most striking feature of phytoplankton communities was the high spatial variability in terms of abundance and biomass, which showed specific coastal Mediterranean values. Undetermined phytoflagellates and diatoms were the dominant groups of the Utermohl fraction of phytoplankton, while round to rod shaped small sized cyanobacteria represented the picophytoplankton fraction. Our data evidenced that in Northern Ionian Sea the phytoplankton development was related to phosphorus availability and to nitrogen rich waters. Also the picophytoplankton seasonal trend was significantly correlated to N compounds as well as to water temperature. In addition to the typical picoplanktonic Synechococcus, the culture techniques allowed us to isolate and identify cyanobacteria belonging to the pleurocapsalean genus Stanieria and the oscillatoriacean genera Geitlerinema, Leiblenia, Leptolyngbya, Oscillatoria, Pseudanabaena and Spirulina. These species represent a minor fraction of the total cyanobacterial community in terms of biomass, but their importance is related to their contribution to the phytoplankton diversity. 86 Caroppo_et_al_JMBA_2006 Caroppo_et_al_JMBA_2006.pdf Articolo in rivista Marine Biological Association of the United Kingdom, 0025 3154 Journal of the Marine Biological Association of the United Kingdom Print Journal of the Marine Biological Association of the United Kingdom Print J. Mar. Biol. Assoc. U.K. Print Journal of the Marine Biological Association of the United Kingdom. Print JMBA Print TURICCHIA SILVIA MARGHERI MARIA CRISTINA carmela.caroppo CAROPPO CARMELA TA.P04.002.001 Fascia Costiera e Ambienti di Transizione analisi strutturale e funzionale delle componenti biotiche ed abiotiche degli ecosistemi per lo sviluppo sostenibile delle attivita TA.P02.006.010 Diversita strutturale e funzionale della comunita microbica di habitat terrestri polari e glaciali |