Search results for "oceanic"
showing 10 items of 642 documents
Effect of different substrata on rhizome growth, leaf biometry and shoot density of Posidonia oceanica
2013
The effects of different substratum typologies on Posidonia oceanica growth and morphology were estimated in four Sicilian meadows using Generalized and Linear Mixed Models combined with retrodating and biometric analyses. Substratum exerted a multiple effect, resulting in different biometric features for P. oceanica shoots settled on rock from those growing on sand and matte. On rock, values for growth rate, leaf length and shoot surface were lower than those on other substrata, with 42%, 23% and 32% the highest degree of difference respectively. The present study may have interesting methodological consequences for the comprehensive understanding of the causative variables potentially aff…
Estimating Posidonia oceanica shoot length by using Multibeam Sonar System
2010
The use of high-resolution seismo-acoustic echosounder imaging for estimation carbon sink in P. oceanica dead matte
2009
Borer polychaetes in seagrass sheaths: a shelter or a trophic relationship? Preliminary results based on carbon and nitrogen stable isotopes
2009
Uso del Sistema Sonar Multi-Beam (MBSS) per la cartografia delle comunità bentoniche
2008
Influenza del substrato su crescita dei rizomi e biometria fogliare di Posidonia oceanica
2011
Posidonia oceanica living in enclosed coastal lagoon as model for testing the effect of climate change on organism near their limit of thermal tolera…
2009
Seagrass litter decomposition in a semi-enclosed coastal ecosystem: a litterbag experiment
2009
Osservazioni sugli endofiti fungini in Posidonia oceanica
2016
La presenza di funghi endofiti in rizomi radici e foglie di Posidonia oceanica (L.) Delille è stata valutata nell’ambito di uno studio morfologico ed ecologico condotto in differenti ambienti mediterranei. In particolare, su individui prelevati in 5 diversi siti costieri siciliani, sono state effettuate osservazioni mirate alla visualizzazione di strutture miceliari nei tessuti dell’ospite, all’isolamento di colonie fungine su substrati artificiali agarizzati e alla loro identificazione su basi morfologiche e molecolari. Le indagini, sebbene tuttora in corso, rilevano la costante presenza di microrganismi fungini endofiti negli organi saggiati sia pure con differenti valori di frequenza d’i…
δ13C and δ15N variability in Posidonia oceanica associated with seasonality and plant fraction
2003
The carbon and nitrogen isotopic compositions of fractions of the seagrass Posidonia oceanica (L.) Delile in a Mediterranean shallow environment (Stagnone di Marsala, western Sicily) were investigated seasonally throughout 1998. The stable isotope ratios of seagrass leaves (intermediate and adult), rhizomes, leaf litter and aegagropiles were compared over 1 year in order to distinguish between seasonal and plant part variability. Significant differences in the isotopic composition tested using ANOVA were observed as a function of both plant fraction and season. There was an overall trend towards less discrimination against 13C in summer (average δ13C ∼ -10‰) than in winter (average δ13C ∼ -…