Comparison of epiphyte algal assemblages on the leaves of marine seagrasses Posidonia oceanica (L.) Delile, Cymodocea nodosa (Ucria) Asch, and the lessepsian Halophila stipulacea (Forssk.) Asch in Chebba (East of Tunisia)

2021 ◽  
Author(s):  
Lotfi Mabrouk ◽  
Mounir Ben Brahim ◽  
Amel Jebara ◽  
Imed Jribi
Keyword(s):  
Posidonia Oceanica ◽  
Cymodocea Nodosa ◽  
Halophila Stipulacea ◽  
Algal Assemblages

Variability of foraminifera associations in seagrass ecosystems in shallow water during winter (Kerkennah – Southern Tunisian coasts)

2017 ◽  
Vol 98 (8) ◽  
pp. 1945-1954 ◽  
Author(s):  
Raida Trabelsi ◽  
Jannet Elloumi ◽  
Asma Hamza ◽  
Najla Ayadi ◽  
Ihsen Zghal ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Benthic Foraminifera ◽  
Statistical Study ◽  
Environmental Parameters ◽  
Posidonia Oceanica ◽  
Cymodocea Nodosa ◽  
Seagrass Species ◽  
Halophila Stipulacea ◽  
Seagrass Ecosystem ◽  
Seagrass Ecosystems

This study intends to reliably estimate the general status of the benthic and the epiphytic foraminifera community related to each studied seagrass ecosystem (Posidonia oceanica,Cymodocea nodosaandHalophila stipulacea) distributed in different shallow sites in the coastal archipelago of Kerkennah (Gulf of Gabes, Tunisia) during winter. We were able to first sort and subsequently identify some characteristics conditioning their behaviour. Twenty-four species of foraminifera were encountered. Among them, three epiphytic species identified on these seagrass leaves had a much lower abundance than those in the sediment. We were interested in highlighting the foraminiferal community related toHalophila stipulacea, since this seagrass species is newly introduced into the Mediterranean sea. Thanks to the statistical study, we were able to identify the favourable habitat for epiphytic and benthic foraminifera among the three seagrass ecosystems. A correlation between the identified foraminifera species and some environmental parameters was addressed using a variety of software.

scholarly journals Distribution and seasonality of the marine macrophytes from Antikyra Gulf (Viotia, Greece)

2001 ◽  
Vol 2 (1) ◽  
pp. 79
Author(s):  
P. MALEA ◽  
S. HARITONIDIS
Keyword(s):  
Posidonia Oceanica ◽  
Qualitative Composition ◽  
Cymodocea Nodosa ◽  
Halophila Stipulacea ◽  
Marine Macrophytes ◽  
First Time

The Gulf of Antikyra (Viotia) with a bauxitic substrate was aggravated by wastes discharged from an Aluminium factory where the Parnassos bauxite is treated Seasonal collections of macrophytes from stations selected inside the Antikyra Gulf were carried out. 85 species of macroalgae were totally collected, out of which 16 belonged to Chlorophyceae, 12 to Phaeophyceae and 57 to Rhodophyceae. There has been no obvious difference in the qualitative composition of the macroalgae as we move away from the area where the wastes are being discharged. Moreover, the stations where depths are greater exhibit different qualitative composition that those with smaller depths. The presence of phanerogams and especially that of Halophila stipulacea, the Lessepsian immigrant, encountered for the first time in the Korinthiakos Gulf, was also evident. The biomass of the three phanerogams decreased with the order: Posidonia oceanica>Cymodocea nodosa>Halophila stipulacea. The biomass of C. nodosaand P. oceanica was higher in July, while that of H. stipulacea was lower in July and higher in March and September.

Temporal Dynamics and Biomass Partitioning in Three Adriatic Seagrass Species: Posidonia oceanica, Cymodocea nodosa, Zostera marina

2002 ◽  
Vol 23 (1) ◽  
pp. 51-67 ◽  
Author(s):  
Paolo Guidetti ◽  
Maurizio Lorenti ◽  
Maria Cristina Buia ◽  
Lucia Mazzella
Keyword(s):  
Zostera Marina ◽  
Temporal Dynamics ◽  
Posidonia Oceanica ◽  
Biomass Partitioning ◽  
Cymodocea Nodosa ◽  
Seagrass Species

scholarly journals A Comparison of Abundance and Diversity of Epiphytic Microalgal Assemblages on the Leaves of the SeagrassesPosidonia oceanica(L.) andCymodocea nodosa(Ucria) Asch in Eastern Tunisia

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Lotfi Mabrouk ◽  
Mounir Ben Brahim ◽  
Asma Hamza ◽  
Mabrouka Mahfoudhi ◽  
Med Najmeddine Bradai
Keyword(s):  
Growth Rate ◽  
Species Composition ◽  
Posidonia Oceanica ◽  
Cymodocea Nodosa ◽  
Seagrass Species ◽  
Light Penetration ◽  
Grazing Effect ◽  
Abundance And Diversity ◽  
Fast Growing Species ◽  
Host Characteristics

We studied spatial patterns in assemblages of epiphytic microalgae on the leaves of two seagrass species with different morphologies and longevity,Cymodocea nodosaandPosidonia oceanica, which cooccur in Chebba in Eastern Tunisia. Epiphyte assemblages were described for each species in summer. Epiphyte microalgal assemblages were more abundant on the leaves ofC. nodosabut more diversified on the leaves ofP. oceanica. We suggest that the differences in species composition and abundance between those seagrass species may reflect an interaction of timescales of seagrass longevity with timescales of algal reproductive biology. Short-livedC. nodosawas dominated by fast growing species such as the cyanobacteria speciesOscillatoriasp., whileP. oceanicaleaves were colonized by more mature and diversified species such as Prorocentrales. Local environmental conditions (hydrodynamics, light penetration), host characteristics (meadow type, shapes forms of leaves, life span, and growth rate), and grazing effect seem also to be responsible for these dissimilarities in epiphytic microalgae communities.

scholarly journals Marine Seagrasses Transplantation in Confined and Coastal Adriatic Environments: Methods and Results

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2289
Author(s):  
Daniele Curiel ◽  
Sandra Kraljević Pavelić ◽  
Agata Kovačev ◽  
Chiara Miotti ◽  
Andrea Rismondo
Keyword(s):  
Twentieth Century ◽  
Zostera Marina ◽  
Adriatic Sea ◽  
Posidonia Oceanica ◽  
Cymodocea Nodosa ◽  
Anthropogenic Pressures ◽  
Northern Adriatic Sea ◽  
Northern Adriatic ◽  
The North ◽  
Over Time

The anthropogenic pressures of the twentieth century have seriously endangered the Mediterranean coastal zone; as a consequence, marine seagrass habitats have strongly retreated, mostly those of Posidonia oceanica. For this reason, over time, restoration programs have been put in place through transplantation activities, with different success. These actions have also been conducted with other Mediterranean marine seagrasses. The results of numerous transplanting operations conducted in the Northern Adriatic Sea and lagoons with Cymodocea nodosa, Zostera marina and Z. noltei and in the Central and Southern Adriatic Sea with P. oceanica (only within the project Interreg SASPAS), are herein presented and compared, taking also into account the presence of extensive meadows of C. nodosa, Z. marina and Z. noltei, along the North Adriatic coasts and lagoons.

scholarly journals Depth-acclimation of photosynthesis, morphology and demography of Posidonia oceanica and Cymodocea nodosa in the Spanish Mediterranean Sea

2002 ◽  
Vol 236 ◽  
pp. 89-97 ◽  
Author(s):  
B Olesen ◽  
S Enríquez ◽  
CM Duarte ◽  
K Sand-Jensen
Keyword(s):  
Mediterranean Sea ◽  
Posidonia Oceanica ◽  
Cymodocea Nodosa

Elective affinities or random choice within the seagrass holobiont? The case of the native Posidonia oceanica (L.) Delile and the exotic Halophila stipulacea (Forssk.) Asch. from the same site (Limassol, Cyprus)

2021 ◽  
pp. 103420
Author(s):  
Chiara Conte ◽  
Alice Rotini ◽  
Gidon Winters ◽  
Marlen I. Vasquez ◽  
Giulia Piazza ◽  
...  
Keyword(s):  
Posidonia Oceanica ◽  
Random Choice ◽  
Halophila Stipulacea ◽  
Elective Affinities
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