55 research outputs found
Proceedings of the 2nd Annual Beaufort Marine Biodiscovery Research Workshop
This publication presents the background and aims of the 2nd Annual Marine Biodiscovery Workshop 2009. Presentations relating to progress achieved in the marine biodiscovery research area through the Irish Beaufort Marine Biodiscovery Research Awards have been captured in extended abstracts.Marine research Sub-Programme 2007-'13Funder: Marine Institut
Light environment and Seasonal Dynamics of Microalgae in the Annual Sea Ice at Terra Nova Bay, Ross Sea, Antarctica
We investigated the physical conditions of the Spring pack ice environment at Terra Nova Bay to understand their influence on the structure and physiology of sympagic microalgae. Bio-optical methods were used to study the availability and spectral quality of solar radiation, both inside and underneath the ice cover. Pack ice thickness was around 2.5 m, with a temperature between -2 and -7°C. On average, only 1.4% of surface PAR penetrated to the bottom ice and less than 0.6% below platelet ice level. Surface UV-B radiation under the bottom ice was 0.2-0.4%. Biomass concentrations up to 2400 mg Chl a m-3, dominated by two species of diatoms (Entomoneis kjellmannii and Nitschia cf. stellata), showed marked spatial and temporal patterns. Maximum values were in the platelet ice during the first half of November, and in the bottom ice two weeks later. Strong shade adaptation characteristics emerged clearly and explained the relevant abundance of microalgae within the sea ice, with specific absorption coefficients (a*) as low as 0.005 m2 (mg Chl a)-1 and the photo-acclimation index (Ek) in the range of in situ irradiance. The biomass specific production values were low, around 0.12-0.13 mg C mg Chl a-1 h-1. The hypothesis suggesting bottom ice colonization by platelet ice microalgae is supported here
Light environment and seasonal dynamics of microalgae in the annual sea ice at Terra Nova Bay (Ross Sea, Antarctica).
Stime di biomassa e produzione primaria nel Canale di Sicilia, attraverso misure di fluorescenza in vivo della clorofilla a.
La fluorescenza in vivo del fitoplancton come metodo di indagine della biomassa in mare: due casi di studio nel Canale di Sicilia
La microflora simpagica bioindicatrice di condizioni ambientali estreme nell'ecosistema pack-ice.
Compostos bioativos e atividade antioxidante em mirtilo (Vaccinium spp) de plantas com dois e cinco anos de idade.
Postharvest Quality during Refrigerated Storage of 'Nadorcott' Mandarin.
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SYMPLEX Experiment: first results on oceanic mesoscale dynamics and related primary production from AVHRR and SeaWIFS satellite data and field experiments
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